CN104014326A - Efficient photocatalyst for bismuth vanadate nanorod and preparation method of catalyst - Google Patents
Efficient photocatalyst for bismuth vanadate nanorod and preparation method of catalyst Download PDFInfo
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- CN104014326A CN104014326A CN201410292842.9A CN201410292842A CN104014326A CN 104014326 A CN104014326 A CN 104014326A CN 201410292842 A CN201410292842 A CN 201410292842A CN 104014326 A CN104014326 A CN 104014326A
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Abstract
The invention relates to an efficient photocatalyst for a bismuth vanadate nanorod and a preparation method of the catalyst. The morphology of the catalyst is rodlike, the size is nano-scale, the diameter of the nanorod is 15-30nm, the draw ratio is 5-40, the specific surface area is 28.2m<2>.g<-1>, the crystal phase is a monoclinic scheelite phase, and the growth direction is [010] direction. The preparation method comprises the following steps: firstly, dissolving bismuth nitrate pentahydrate, and sodium oleate or oleic acid into water, acutely stirring, and then adding ammonium metavanadate to a mixed solution; carrying out water heating for 6-48 hours under the condition at 70-200 DEG C, and centrifugally washing and drying to obtain the bismuth vanadate nanorod. Compared with the prior art, the synthesis method adopted by the invention is simple in equipment, convenient to operate, short in synthesis cycle, high in repeatability, few in raw material species, low in cost, environmental friendly, free of pollution and high in yield, the prepared bismuth vanadate nanorod is high in adsorption capacity, and the toxic pollutants and decomposition water can be abnormally efficiently degraded under radiation of an ultraviolet light, a visible light and a natural light.
Description
Technical field
The present invention relates to a kind of photochemical catalyst, especially relate to a kind of pucherite nanometer rods high efficiency photocatalyst and preparation method thereof.
Background technology
Ecological deterioration and energy crisis are two outstanding social difficult problems that restrict at present human kind sustainable development and affect human life quality.Solar energy, as a kind of inexhaustible clean energy resource, is subject to the mankind's very big attention, and the universal of solar energy generation technology not only effectively alleviated energy shortage problem, also alleviated from the side to a certain extent environmental pressure; Similarly, utilize solar energy directly to administer some problem of environmental pollution and be also more and more subject to people's attention, and developed various technological means.
In environmental pollution, the main pollutant of a class is water body and airborne toxic organic compound, and especially, in the waste water of the industrial discharges such as weaving, printing and dyeing, papermaking, the organic matter of the difficult natural degradation such as organic dyestuff occupies very high ratio in waste water; In drinking water and newly-decorated room air, also contain the micro-content organism that can cause to the person significant damage, as the DBPs monoxone in running water etc. and new clothes repair the house between in the formaldehyde that discharges etc.; Air pollution in the laboratory of scientific research institutions and the factory building of chemical enterprise is troubling equally.Research shows, some semiconductors under illumination except can being directly converted to electric energy, the electronics being produced by optical excitation and hole have respectively suitable reducing power and oxidability, if photohole can move to semiconductor surface, just can produce nontoxic carbon dioxide by a variety of toxic organic compounds of oxidative degradation, provide a very significant approach for utilizing solar energy to curb environmental pollution.At present, the degradable organic semiconductor that people have found has a variety of, wherein titanium dioxide is maximum also the most ripe studied a kind of photochemical catalyst, it is very many that it has advantages of that cost is low, chemical stability good, unglazed burn into is environment friendly and pollution-free etc., but because of greater band gap (3.2eV), can only produce response to the ultraviolet light that accounts for sunshine 4%, thereby efficiency is very low, becomes the principal element that limits its application.Therefore research and development have titanium dioxide advantage and the high photochemical catalyst of capacity usage ratio is very urgent.
Pucherite is a kind of novel photocatalyst, there is multiple crystal formation, but it is optimum that the photocatalysis performance of monocline scheelite type pucherite is proved to be, its band gap is only 2.4eV, can be to a wide range of visible light-responded, thereby the shortcoming that has overcome the low-yield utilization rate of titanium dioxide, has excellent visible light photocatalysis active; In addition, the chemical stability of pucherite and photostability are superior equally, and nontoxic pollution-free, thereby are also often used as coating.In view of the excellent specific property of pucherite, also more and more for the research work of pucherite, people have also had clearer understanding to its light-catalysed physical essence.However,, due to factors such as electron-hole recombination rate in pucherite are high, and charge transport properties is poor, still there is ample room for improvement for its photocatalytic activity.At present, people have to a certain degree improved the photocatalytic activity of pucherite by preparing the technological means such as composite construction, doping, load, but this mode cost is higher; The another kind of mode that improves its photocatalytic activity is to control the pattern of pucherite crystal, generally achieve the goal by adding various chelating agents or surfactant, and obtain obvious effect, ball-type, dumbbell shape nano particle, regular octahedron shape, rescinded angle octahedral build are nanocrystalline, quantum pipe, nanometer sheet etc. all existing institute are reported.
As everyone knows, large specific area is one of target of various photochemical catalysts pursuits, because huge specific area can provide more reaction site, improve the speed of photocatalysis degradation organic contaminant, and the main approach of raising pucherite specific area is to reduce the size of the pucherite crystal of preparation; The size that reduces pucherite can also shorten light induced electron and hole migration to the transmission range of catalyst surface, improves the survival rate in light induced electron hole; In addition, plane of crystal defect is also to improve the key factor of photochemical catalyst adsorption capacity.Study and also show, the photocatalytic activity otherness of the different crystal faces of pucherite is very large, and light induced electron especially easily { is being assembled [Li, R. on 010} crystal face; Zhang, F.; Wang, D.; Yang, J.; Li, M.; Zhu, J.; Zhou, X.; Han, H.; Li, C., Spatial separation of photogenerated electrons and holes among{010}and{110}crystal facets of BiVO
4.Nature communications, 2013.4:p.143.] but only have the hole ability oxidative degradation toxic organic compound producing under illumination, therefore be orientated in bar-shaped pucherite crystal in [010], electronics will preferentially be gathered in nanometer rods two ends, so not only improve the separative efficiency of electron hole, also make hole more stable be distributed in nanometer rods side, be very beneficial for organic degraded.Therefore exploitation is a kind of simple, and cost is low, and the method for green non-pollution is prepared and had exhibiting high surface defect, nano-scale, to have [010] orientation pucherite nanometer rods tool and be of great significance.
Summary of the invention
Object of the present invention is exactly to provide a kind of surface can produce a large amount of oxygen room in order to overcome the defect that above-mentioned prior art exists, and specific area is high, toxic organic pollutant is there is to pucherite nanometer rods high efficiency photocatalyst of very strong adsorption capacity and preparation method thereof.
Object of the present invention can be achieved through the following technical solutions: a kind of pucherite nanometer rods high efficiency photocatalyst, it is characterized in that, and the pattern of this catalyst is bar-shaped, size is at nanoscale, this nanometer rods diameter is 15-30nm, and draw ratio is 5-40, and specific area is 28.2m
2g
-1, crystalline phase is monocline scheelite phase, the direction of growth is [010] direction.
A preparation method for pucherite nanometer rods high efficiency photocatalyst, is characterized in that, the method comprises the following steps:
(1) five nitric hydrate bismuths are dissolved in and in deionized water, obtain the solution that concentration is 0～0.1mol/L, taking PTFE (polytetrafluoroethylene (PTFE)) liner of water heating kettle as container, stirring 10～60min makes described solution form the turbid liquid of uniform milky, then adding amount of substance is enuatrol or the oleic acid of 0.5～6 times of five nitric hydrate bismuth, stir the stable milk-white coloured suspension of the above formation of 30min, be designated as solution A;
(2) will be dissolved in deionized water with the ammonium metavanadate of the amount of substance such as five nitric hydrate bismuths, be stirred to it and dissolve and form light yellow transparent solution, be designated as solution B;
(3) solution B step (2) being obtained adds the A solution in PTFE liner while stirring, then continues to stir 0.5～8h, obtains uniform light yellow mixed liquor C;
(4) mixed liquor C step (3) being obtained transfers in hydrothermal reaction kettle, adds one of magnet, under 70～200 DEG C of conditions, reacts 6～48h, naturally cools to room temperature;
(5) deionized water, ethanol and the normal butane for product that step (4) are obtained wash and centrifugal 3～6 times, and are dried 4～24h at 40～100 DEG C, obtain luteotestaceous pucherite nanometer rods, are designated as BVO-NRs;
(6) by dry step (5) the pucherite nanometer rods heat treatment 0.5～6h under 180～260 DEG C of conditions obtaining, obtain the pucherite nanometer rods of modification, be designated as HT-BVO-NRs.
The enuatrol that step (1) is described or the amount of substance of oleic acid are 2-4 times of five nitric hydrate bismuths.
Preferably 90～120 DEG C of the reaction temperatures of the high-temperature high-pressure reaction kettle described in step (4), the reaction time is 18～30h preferably; In described high-temperature high-pressure reaction kettle, can not add magnet, add the magnet can Reaction time shorten.
The described heat treatment modification temperature of step (6) is 210～250 DEG C.
Wherein, bismuth nitrate need mix prior to enuatrol/oleic acid, could mix with ammonium metavanadate again (or ammonium metavanadate elder generation mixes with enuatrol/oleic acid, then mix with bismuth nitrate.
The present invention prepares the low-temperature hydrothermal synthetic method that pucherite nanometer rods adopts, and makees pattern controlling agent with the free of contamination enuatrol/oleic acid of cheapness, without regulating pH and adding other poisonous additives, equipment requirement is low, easy to operation, and reaction time is short, productive rate is high, favorable repeatability.In hydrothermal reaction process, different pattern controlling agents causes their difference at aspects such as sterically hindered, polarity because of its molecular structure difference, thereby can regulate and control to generate the crystal of different-shape, enuatrol/enuatrol belongs to anion surfactant, there are water-wet side and hydrophobic side, when using enuatrol/oleic acid as pattern controlling agent, its water-wet side can with Bi
3+form complex, guiding Bi
3+with VO
3-be assembled into together, be finally assembled into and have [010] orientation, diameter is 15～30nm, the nanometer rods that draw ratio is 5～40; This nanometer rods monodispersity is good, and specific area is large, and a large amount of V are contained on surface
4+the oxygen room that induction produces, thus very strong to Adsorption of Organic ability; Electrons is selectively accumulated in nanometer rods two ends, thereby electron hole separative efficiency is high, has just had very high photocatalytic activity without the follow-up modification of complex and expensive; By nanometer rods being carried out to, after a Low Temperature Heat Treatment, can improve its crystallinity, reduce defect concentration in crystal, the resistance while having reduced carrier mobility, thus further improve the photocatalytic activity of nanometer rods.No matter this is in pure bismuth vanadate photocatalyst by the nano-rod photo-catalyst adsorbing and photocatalysis gathers, or through in the bismuth vanadate photocatalyst of modification, is all outstanding persons, has very significantly cost advantage and cost performance.
In order to check the photocatalytic activity of pucherite nanometer rods prepared by the present invention, the rhodamine B simulated wastewater that is 10mg/L with 50ml mass concentration by the pucherite nano-rod photo-catalyst of 0.6mmol mixes, be that 350W the xenon lamp of being furnished with 420nm optical filter irradiate with power, measure the change in concentration of rhodamine B simulated wastewater, and with compare as the result of photochemical catalyst using business-like Degussa P25.Experiment showed, pucherite nanometer rods BVO-NRs of the present invention to the adsorption rate of rhodamine B up to 61%, and can be in 16min, rhodamine B is degradable; Although the HT-BVO-NRs that heat treatment obtains after implementing decreases (still up to 23%) to the adsorption rate of rhodamine B, its photocatalytic activity is higher, in 9min, just rhodamine B can be decomposed completely; By comparison, under the same terms, only can degrade in 20min 4% rhodamine B of P25.From their polymerization kinetics curves, more can find out intuitively, BVO-NRs photochemical catalyst is 38 times of P25 to the degradation rate of rhodamine B, HT-BVO-NRs photochemical catalyst has been 88 times of P25 to the degradation rate of rhodamine, the activity of the pucherite nano-rod photo-catalyst that therefore the present invention obtains is far above P25, also most of photochemical catalyst of having reported higher than other, has very high commercial value.The pucherite nano-rod photo-catalyst the present invention relates to also can be used on the field of photolysis water hydrogen gas or oxygen and other and the energy and environmental correclation.
Compared with prior art, pucherite nano-rod photo-catalyst of the present invention, surface can produce a large amount of oxygen room, and specific area is high, and toxic organic pollutant is had to very strong adsorption capacity; This nanometer rods can be prolonged [010] direction growth, thereby promotes the separation in light induced electron hole, makes it can very effective degradable organic pollutant under visible ray; This preparation method need have the advantages such as preparation technology is simple, with low cost, environment friendly and pollution-free.
Brief description of the drawings
Fig. 1 is the shape appearance figure of the prepared BVO-NRs photochemical catalyst of embodiment 1 under transmission electron microscope;
Fig. 2 is the high resolution graphics of the prepared BVO-NRs photochemical catalyst of embodiment 1;
Fig. 3 is the XRD spectra of the prepared BVO-NRs of embodiment 1 and HT-BVO-NRs photochemical catalyst;
Fig. 4 is the curve map of the prepared BVO-NRs of embodiment 1 and HT-BVO-NRs photochemical catalyst rhodamine B degradation under visible ray condition, is referenced as blank test and the curve map during as photochemical catalyst taking gyp Degussa P25;
Fig. 5 is the speed constant contrast of the prepared BVO-NRs of embodiment 1 and HT-BVO-NRs photochemical catalyst rhodamine B degradation under visible ray condition, is referenced as the speed constant during as photochemical catalyst taking gyp Degussa P25;
Stability test when Fig. 6 is the prepared HT-BVO-NRs photocatalyst for degrading rhodamine B of embodiment 1.
Detailed description of the invention
Below by specific embodiment, the present invention is described in further detail, and following examples can make those skilled in the art more fully understand the present invention, but do not limit the present invention in any way.
Embodiment 1
The first step: the five nitric hydrate bismuths of getting 0.4mmol are dissolved in 20ml deionized water, taking the PTFE liner of water heating kettle as container, stir 30min and form the turbid liquid of uniform milky, then add the enuatrol of 1.2mmol, stir 60min to obtain stable milk-white coloured suspension, be designated as solution A;
Second step: the ammonium metavanadate of getting 0.4mmol is dissolved in 20ml deionized water, is stirred to it and dissolves formation light yellow transparent solution, is designated as solution B;
The 3rd step: solution B is added to the A solution in PTFE liner while stirring, then continue to stir 2h, obtain uniform light yellow mixed liquor C;
The 4th step: the turbid liquid C mixing transfers in high-temperature high-pressure reaction kettle, adds one piece to stir magneton, under 100 DEG C of conditions, reacts 24h, naturally cools to room temperature;
The 5th step: deionized water, ethanol and the normal butane for product that obtain are washed and centrifugal 4 times, and be dried 12h at 60 DEG C, obtain luteotestaceous pucherite nanometer rods, be designated as BVO-NRs;
The 6th step: by the dry pucherite nanometer rods heat treatment 2h under 230 DEG C of conditions obtaining, obtain the pucherite nanometer rods of modification, be designated as HT-BVO-NRs.
As seen from Figure 1, the prepared bismuth vanadate photocatalyst of the present embodiment 1 is nanometer rods pattern, and monodispersity is good, and diameter is about 20nm, and draw ratio is 5～30.
As seen from Figure 2, perpendicular to the interplanar distance of the crystal face of nanorod growth direction and pucherite, { 040} interplanar distance matches, and proves that this pucherite nanometer rods prolongs [010] direction and extend.
Compared with the standard spectrogram (JCPDS NO.14-0688) of the BVO-NRs in Fig. 3 and the XRD spectra of HT-BVO-NRs and monocline scheelite phase pucherite, all fit like a glove, illustrate that pucherite nanometer rods prepared by the present embodiment 1 is highly active monocline scheelite-type structure, heat treatment modification subsequently does not change its crystal structure; But the XRD spectra by contrast BVO-NRs and HT-BVO-NRs can be found out, the crystal perfection of HT-BVO-NRs is more excellent, defect still less, more be conducive to carrier transmission therein, thereby its photocatalytic activity is also higher, and also corresponding its adsorption capacity to organic pollution that reduced of the minimizing of defect.
Utilize the prepared BVO-NRs of the present embodiment 1 and HT-BVO-NRs rhodamine B degradation under visible ray condition, and taking business-like Degussa P25 as contrast, the degradation curve obtaining as shown in Figure 4, can see, BVO-NRs rhodamine B of adsorbable 61% before illumination, and can be in 16min by degradable rhodamine B fall; HT-BVO-NRs rhodamine B of adsorbable 23% before illumination, and can in 9min, rhodamine B completely be divided and be taken off: by contrast, P25 has only adsorbed approximately 3% rhodamine B before illumination, 4% the rhodamine B of only having degraded in 20min.Fig. 5 is BVO-NRs, the reaction rate constant comparison diagram of HT-BVO-NRs and P25, as can be seen from the figure, BVO-NRs is 38 times of P25 to the degradation rate of rhodamine B, and HT-BVO-NRs is to the degradation rate of rhodamine 88 times of P25 especially, the photochemical catalyst that therefore prepared by the present embodiment 1 has very superior photocatalysis performance.
As can be seen from Figure 6, the HT-BVO-NRs photochemical catalyst that the present embodiment 1 obtains, rhodamine B degradation under the same conditions, after five circulations, its adsorption capacity and photo-catalysis capability have no significant change, and have shown goodish stability, significant for its practical application.
Embodiment 2
Preparation method in the present embodiment is identical with embodiment 1, and difference is only preparation process conditional difference, and in the step 1 and step 2 of the present embodiment, the amount of substance of bismuth nitrate, ammonium metavanadate and enuatrol all doubles compared with embodiment 1, and all the other conditions are constant.
Characterize with the bismuth vanadate photocatalyst that the means such as transmission electron microscope, X-ray diffraction are prepared the present embodiment 2.Transmission electron microscope results shows that the bismuth vanadate photocatalyst that the present embodiment 2 obtains is nano bar-shape, and monodispersity is good, and diameter is about 25nm, and draw ratio is 10～35, and prolongs [010] direction and extend.X-ray diffraction result shows that the pucherite nanometer rods obtaining is monocline scheelite phase.
Embodiment 3
Preparation method in the present embodiment is identical with embodiment 1, and difference is only preparation process conditional difference, and the step 4 hydro-thermal reaction time of the present embodiment is 48h, does not add magneton, and all the other conditions are constant.
Characterize with the bismuth vanadate photocatalyst that the means such as transmission electron microscope, X-ray diffraction are prepared the present embodiment 3.Transmission electron microscope results shows that the bismuth vanadate photocatalyst that the present embodiment 3 obtains is nano bar-shape, and monodispersity is good, and diameter is about 20nm, and draw ratio is 10～40, and prolongs [010] direction and extend.X-ray diffraction result shows that the pucherite nanometer rods obtaining is monocline scheelite phase.
Embodiment 4
Preparation method in the present embodiment is identical with embodiment 1, and difference is only preparation process conditional difference, and the step 6 heat treatment temperature of the present embodiment is 250 DEG C, and all the other conditions are constant.
Characterize with the bismuth vanadate photocatalyst that the means such as transmission electron microscope, X-ray diffraction are prepared the present embodiment 2.Transmission electron microscope results shows that the bismuth vanadate photocatalyst that the present embodiment 2 obtains is nano bar-shape, and monodispersity is good, and diameter is about 20nm, and draw ratio is 5～30, and prolongs [010] direction and extend.X-ray diffraction result shows that the pucherite nanometer rods obtaining is monocline scheelite phase, and the adsorption capacity of HT-BVO-NRs is lower, is only 15%.
Embodiment 5
The first step: the five nitric hydrate bismuths of getting 2mmol are dissolved in 20ml deionized water, taking the PTFE liner of water heating kettle as container, stir 60min and form the turbid liquid of uniform milky, then add the enuatrol of 12mmol, stir 60min to obtain stable milk-white coloured suspension, be designated as solution A;
Second step: the ammonium metavanadate of getting 2mmol is dissolved in 20ml deionized water, is stirred to it and dissolves formation light yellow transparent solution, is designated as solution B;
The 3rd step: solution B is added to the A solution in PTFE liner while stirring, then continue to stir 8h, obtain uniform light yellow mixed liquor C;
The 4th step: the turbid liquid C mixing transfers in high-temperature high-pressure reaction kettle, adds one piece to stir magneton, under 200 DEG C of conditions, reacts 6h, naturally cools to room temperature;
The 5th step: the ethanol that is 1: 0.1 by volume ratio by the product obtaining and the washing of the mixed solution of normal butane also centrifugal 5 times, and at 100 DEG C, be dried 4h, and obtain luteotestaceous pucherite nanometer rods, be designated as BVO-NRs;
The 6th step: by the dry pucherite nanometer rods heat treatment 0.5h under 260 DEG C of conditions obtaining, obtain the pucherite nanometer rods of modification, be designated as HT-BVO-NRs.
Embodiment 6
The first step: the five nitric hydrate bismuths of getting 0.2mmol are dissolved in 20ml deionized water, taking the PTFE liner of water heating kettle as container, stir 10min and form the turbid liquid of uniform milky, then add the enuatrol of 0.1mmol, stir 30min to obtain stable milk-white coloured suspension, be designated as solution A;
Second step: the ammonium metavanadate of getting 0.2mmol is dissolved in 20ml deionized water, is stirred to it and dissolves formation light yellow transparent solution, is designated as solution B;
The 3rd step: solution B is added to the A solution in PTFE liner while stirring, then continue to stir 0.5h, obtain uniform light yellow mixed liquor C;
The 4th step: the turbid liquid C mixing transfers in high-temperature high-pressure reaction kettle, adds one piece to stir magneton, under 70 DEG C of conditions, reacts 48h, naturally cools to room temperature;
The 5th step: the ethanol that is 1: 2 by volume ratio by the product obtaining and the washing of the mixed solution of normal butane also centrifugal 5 times, and at 40 DEG C, be dried 24h, and obtain luteotestaceous pucherite nanometer rods, be designated as BVO-NRs;
The 6th step: by the dry pucherite nanometer rods heat treatment 6h under 180 DEG C of conditions obtaining, obtain the pucherite nanometer rods of modification, be designated as HT-BVO-NRs.
Although by reference to the accompanying drawings the preferred embodiments of the present invention are described above; but the present invention is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not departing from the scope situation that aim of the present invention and claim protect, can also make the concrete conversion of a lot of forms, within these all belong to protection scope of the present invention.
Claims (5)
1. a pucherite nanometer rods high efficiency photocatalyst, is characterized in that, the pattern of this catalyst is bar-shaped, and size is at nanoscale, and this nanometer rods diameter is 15-30nm, and draw ratio is 5-40, and specific area is 28.2m
2g
-1, crystalline phase is monocline scheelite phase, the direction of growth is [010] direction.
2. a preparation method for pucherite nanometer rods high efficiency photocatalyst as claimed in claim 1, is characterized in that, the method comprises the following steps:
(1) five nitric hydrate bismuths are dissolved in and in deionized water, obtain the solution that concentration is 1～100mmol/L, taking the PTFE liner of water heating kettle as container, stirring 10～60min makes described solution form the turbid liquid of uniform milky, then adding amount of substance is enuatrol or the oleic acid of 0.5～6 times of five nitric hydrate bismuth, stir the stable milk-white coloured suspension of the above formation of 30min, be designated as solution A;
(2) will be dissolved in deionized water with the ammonium metavanadate of the amount of substance such as five nitric hydrate bismuths, be stirred to it and dissolve and form light yellow transparent solution, be designated as solution B;
(3) solution B step (2) being obtained adds the A solution in PTFE liner while stirring, then continues to stir 0.5～8h, obtains uniform light yellow mixed liquor C;
(4) mixed liquor C step (3) being obtained transfers in hydrothermal reaction kettle, adds one of magnet, under 70～200 DEG C of conditions, reacts 6～48h, naturally cools to room temperature;
(5) product deionized water step (4) being obtained or the washing of the mixed solution of ethanol and normal butane also centrifugal 3～6 times, and at 40～100 DEG C, be dried 4～24h, obtain luteotestaceous pucherite nanometer rods, be designated as BVO-NRs;
(6) by dry step (5) the pucherite nanometer rods heat treatment 0.5～6h under 180～260 DEG C of conditions obtaining, obtain the pucherite nanometer rods of modification, be designated as HT-BVO-NRs.
3. the preparation method of a kind of pucherite nanometer rods high efficiency photocatalyst according to claim 2, is characterized in that, the enuatrol that step (1) is described or the amount of substance of oleic acid are 2-4 times of five nitric hydrate bismuths.
4. the preparation method of a kind of pucherite nanometer rods high efficiency photocatalyst according to claim 2, is characterized in that, preferably 90～120 DEG C of the reaction temperatures of the described high-temperature high-pressure reaction kettle of step (4), and the reaction time is 18～30h preferably; In described high-temperature high-pressure reaction kettle, can not add magnet, can Reaction time shorten but add magnet.
5. the preparation method of a kind of pucherite nanometer rods high efficiency photocatalyst according to claim 2, is characterized in that, the described heat treatment modification temperature of step (6) is 210～250 DEG C.
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| CN114931941A (en) * | 2022-03-25 | 2022-08-23 | 山东大学 | Semiconductor photocatalytic material, preparation method and application in preparation of imine |
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