CN109331841A - A kind of CdS nanometer snowflake photocatalyst and its preparation method and application - Google Patents
A kind of CdS nanometer snowflake photocatalyst and its preparation method and application Download PDFInfo
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- CN109331841A CN109331841A CN201811534454.1A CN201811534454A CN109331841A CN 109331841 A CN109331841 A CN 109331841A CN 201811534454 A CN201811534454 A CN 201811534454A CN 109331841 A CN109331841 A CN 109331841A
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- 239000011941 photocatalyst Substances 0.000 title claims abstract description 19
- 241000533950 Leucojum Species 0.000 title claims description 32
- 238000002360 preparation method Methods 0.000 title claims description 20
- 239000003054 catalyst Substances 0.000 claims abstract description 33
- SOIFLUNRINLCBN-UHFFFAOYSA-N ammonium thiocyanate Chemical compound [NH4+].[S-]C#N SOIFLUNRINLCBN-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000013078 crystal Substances 0.000 claims abstract description 9
- 239000000126 substance Substances 0.000 claims abstract description 5
- AUIZLSZEDUYGDE-UHFFFAOYSA-L cadmium(2+);diacetate;dihydrate Chemical compound O.O.[Cd+2].CC([O-])=O.CC([O-])=O AUIZLSZEDUYGDE-UHFFFAOYSA-L 0.000 claims abstract 8
- 229910052980 cadmium sulfide Inorganic materials 0.000 claims description 46
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 32
- HUKFCVYEXPZJJZ-UHFFFAOYSA-N cadmium;hydrate Chemical compound O.[Cd] HUKFCVYEXPZJJZ-UHFFFAOYSA-N 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 21
- 238000006243 chemical reaction Methods 0.000 claims description 20
- 229960000583 acetic acid Drugs 0.000 claims description 16
- 239000012362 glacial acetic acid Substances 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000008367 deionised water Substances 0.000 claims description 11
- 229910021641 deionized water Inorganic materials 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000013033 photocatalytic degradation reaction Methods 0.000 claims description 5
- 238000005286 illumination Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- WUPHOULIZUERAE-UHFFFAOYSA-N 3-(oxolan-2-yl)propanoic acid Chemical compound OC(=O)CCC1CCCO1 WUPHOULIZUERAE-UHFFFAOYSA-N 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims 2
- PQLVXDKIJBQVDF-UHFFFAOYSA-N acetic acid;hydrate Chemical compound O.CC(O)=O PQLVXDKIJBQVDF-UHFFFAOYSA-N 0.000 claims 1
- 238000001816 cooling Methods 0.000 claims 1
- 238000011049 filling Methods 0.000 claims 1
- 239000002159 nanocrystal Substances 0.000 claims 1
- 230000007935 neutral effect Effects 0.000 claims 1
- 238000000967 suction filtration Methods 0.000 claims 1
- 238000001027 hydrothermal synthesis Methods 0.000 abstract description 11
- 230000003197 catalytic effect Effects 0.000 abstract description 6
- 230000015556 catabolic process Effects 0.000 abstract description 4
- 238000006731 degradation reaction Methods 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 239000004065 semiconductor Substances 0.000 abstract description 3
- 238000002474 experimental method Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000000969 carrier Substances 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000007146 photocatalysis Methods 0.000 description 6
- 230000001699 photocatalysis Effects 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 229960000935 dehydrated alcohol Drugs 0.000 description 5
- 238000011010 flushing procedure Methods 0.000 description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 238000006555 catalytic reaction Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000035484 reaction time Effects 0.000 description 4
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 4
- 229940043267 rhodamine b Drugs 0.000 description 4
- ZMZDMBWJUHKJPS-UHFFFAOYSA-N thiocyanic acid Chemical compound SC#N ZMZDMBWJUHKJPS-UHFFFAOYSA-N 0.000 description 4
- 239000003643 water by type Substances 0.000 description 4
- 238000011109 contamination Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- QYTOONVFPBUIJG-UHFFFAOYSA-N azane;cyanic acid Chemical compound [NH4+].[O-]C#N QYTOONVFPBUIJG-UHFFFAOYSA-N 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 235000007516 Chrysanthemum Nutrition 0.000 description 1
- 244000189548 Chrysanthemum x morifolium Species 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000002173 high-resolution transmission electron microscopy Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002057 nanoflower Substances 0.000 description 1
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000001782 photodegradation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/02—Sulfur, selenium or tellurium; Compounds thereof
- B01J27/04—Sulfides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
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Abstract
本发明公开了一种CdS纳米雪花光催化剂，所述催化剂形状呈现为由六个叶片状结构组成的六边形雪花状结构，直径为2～8μm；其中每个叶片状结构长度为1～4μm，宽度为0.5～2μm；其主要暴露晶面为002面。是以二水乙酸镉、硫氰酸铵为主要原料，通过简单水热方法制得。本发明的光催化剂以窄带隙半导体CdS，结合高活性暴露面(002)，可提高光子吸收、迁移率；在光照作用下，有利于载流子分子，另外产生的载流子，提高了光催化反应活性。实验证实：在太阳光(尤其是紫外光和可见光)下本发明的催化剂对有机污染模型物的降解具有良好的催化性能，市场应用前景广阔。
The invention discloses a CdS nano-snowflake photocatalyst. The shape of the catalyst is a hexagonal snowflake-like structure composed of six leaf-like structures, and the diameter is 2-8 μm; wherein the length of each leaf-like structure is 1-4 μm , with a width of 0.5-2 μm; its main exposed crystal plane is the 002 plane. It is prepared by simple hydrothermal method with cadmium acetate dihydrate and ammonium thiocyanate as main raw materials. The photocatalyst of the present invention uses the narrow band gap semiconductor CdS, combined with the highly active exposed surface (002), which can improve the photon absorption and mobility; under the action of light, it is beneficial to the carrier molecules, and the additionally generated carriers improve the photon absorption rate. catalytic activity. Experiments have confirmed that the catalyst of the present invention has good catalytic performance for the degradation of organic pollution model substances under sunlight (especially ultraviolet light and visible light), and has broad market application prospects.
Description
Technical field
The present invention relates to a kind of photochemical catalysts and the preparation method and application thereof more particularly to a kind of CdS nanometers of snowflake light to urge
Agent and the preparation method and application thereof；Belong to nano material photocatalysis technology field.
Background technique
Photochemical catalyst is that one kind itself is not involved in reaction and accelerates photochemically reactive substance.Photocatalysis is photochemistry and urge
The combination of agent.Under the overall background of environmental pollution and energy crisis, photocatalysis prepares clean energy resource-hydrogen and drop
Solving organic pollutant is a kind of high effective green environmentally friendly new technology developed in recent years.But its grinding as new function material
Hair, also faces many limitations, and if catalytic performance is single, catalyst efficiency, inactivation and secondary pollution, sun light utilization efficiency is low
Deng (for plum at, Tao Yang, Lu Lichen, Zhou Weijun, the wide Photodegradation catalyst of Korea Spro's book and its application study progress [J] chemical industry are novel
Material, 2018,46 (10): 57-62.).Based on this, exploitation and building heterojunction structure have become and obtain novel high-performance light at present
The important means of catalysis material.
Titanium dioxide is catalysis material more mature at present, wherein nano-titanium dioxide P25, nano titania
Ball, nano flower, the nano materials such as nanometer rods have good ultraviolet catalytic performance, and photocatalysis performance has wide coverage.
But there are still many following disadvantages for even mature catalysis material: high catalytic activity face exposes less, recycling separation is difficult, only
It is excited under ultraviolet light conditions, sun light utilization efficiency low equal (Chen Shunsheng, Cao Xin, Chen Chunhui, Zhou Yuwen, the small chrysanthemum .TiO of Lu2Base is multiple
Light combination Research advance in catalysts for production [J] functional material, 2018,49 (07): 7039-7049+7056.).Therefore it is highly desirable out
The superior photochemical catalyst of the performance for sending out new.However so far, for CdS nanometers of snowflake photochemical catalysts and its preparation, and benefit
Use high activity exposure (002 crystal face) CdS nanometers of snowflakes as photochemical catalyst in catalyzing and degrading pollutant using rarely seen report
Road.
Summary of the invention
For the deficiency of photochemical catalyst and preparation method thereof in the prior art, the problem to be solved in the present invention is to provide one kind
CdS nanometers of snowflake photochemical catalysts and preparation method thereof with its as photochemical catalyst in solar radiation (ultraviolet light, visible light) condition
The application of organic contamination model object in lower photocatalytic degradation processing water.
CdS nanometers of snowflake photochemical catalyst of the present invention, it is characterised in that: the catalyst is CdS nanocrystalline, vulcanization
Cadmium crystal phase is hexagonal phase, and shape is rendered as the hexagon snow shaped structure being made of six bladed structures, and diameter is 2~8 μ
m；Wherein each bladed structure length is 1~4 μm, and width is 0.5~2 μm；The main exposed crystal face of the CdS nanometers of snowflake
For 002 face.
Wherein: the catalyst shape is rendered as the hexagon snow shaped structure being made of six bladed structures, diameter
Preferably 5 μm ± 1 μm；Wherein each bladed structure length is preferably 2.5 μm ± 0.5 μm, and width is preferably 1.5 μm of ± 0.5 μ
m。
The preparation method of CdS nanometers of snowflake photochemical catalyst of the present invention, step is:
(1) two water cadmium acetates and ammonium thiocyanate are weighed respectively, are dissolved in deionized water, glacial acetic acid is added after dissolution,
It is stirring evenly and then adding into hydrothermal reaction kettle, compactedness is controlled the 50%~80% of reactor volume；Then sealing reaction
Kettle is put it into drying box, heating reaction；
(2) cooled to room temperature, product filter after rinsing, are dry after reaction, obtain CdS nanometers of snowflake photocatalysis
Agent powder；
It is characterized by:
Step (1) the two water cadmium acetate and the ammonium thiocyanate ratio of 2:1~2:5 in mass ratio weigh respectively, composition two
Water cadmium acetate+ammonium thiocyanate mixture, and it is added to the mixture and deionized water, glacial acetic acid in hydrothermal reaction kettle
Weight ratio is successively: 1~1.2 part of mixture of two water cadmium acetates+ammonium thiocyanate, 100 parts of deionized water, glacial acetic acid 0.5
~0.7 part；Wherein, the stirring and dissolving time after two water cadmium acetates and ammonium thiocyanate are added in deionized water is no less than 30min, molten
The mixing time that glacial acetic acid is added after solution is no less than 10min；The condition of the heating reaction is: controlling hydrothermal temperature 150
~220 DEG C, react 10h~20h；
Step (2) the product purging method is: by products therefrom dehydrated alcohol repeated flushing to neutrality.
In the preparation method of above-mentioned CdS nanometers of snowflake photochemical catalyst: step (1) the two water cadmium acetate and ammonium thiocyanate are excellent
Choosing the ratio of 2:3 in mass ratio weigh respectively, form two water cadmium acetates+ammonium thiocyanate mixture, and make the mixture with
Deionized water, glacial acetic acid are added to the weight ratio in hydrothermal reaction kettle: two water cadmium acetates+ammonium thiocyanate
1 part of mixture, 100 parts of deionized water, 0.5 part of glacial acetic acid；The condition of the heating reaction is preferably: hydrothermal temperature control being made to exist
180~200 DEG C, react 15h~20h.
Further, in the preparation method of above-mentioned CdS nanometers of snowflake photochemical catalyst: the item of step (1) the heating reaction
Part is preferably: being made solvent temperature control at 200 DEG C, is reacted 20h.
The CdS nanometers of snowflake photochemical catalyst of the present invention photocatalytic degradation organic contamination model object under illumination condition is answered
With.
From the experimental result of photocatalytic degradation curve it can be seen that utilizing CdS nanometers of snowflake photocatalysis of the present invention
Agent sample ultraviolet light (UV) and visible light (Vis) irradiation under degrade to rhodamine B solution, respectively through 20min,
It is degradable to 100% after 80min irradiation.
The invention discloses a kind of CdS nanometers of snowflake photochemical catalysts and the preparation method and application thereof.Preparation method is benefit
With the efficient light absorption of narrow gap semiconductor CdS, excellent electron mobility and good chemical stability, with its work
For photochemical catalyst starting point, it is successfully prepared using hydro-thermal method with effective UV and catalyzing and degrading pollutant by visible light and exposure
The photochemical catalyst in CdS high activity face (002 crystal face).The photochemical catalyst is with narrow gap semiconductor CdS, in conjunction with high activity exposure
(002), photonic absorption, mobility can be improved；Under illumination effect, be conducive to carrier molecule, the carrier in addition generated mentions
High light-catalyzed reaction activity.Experiment confirms: the catalyst pair of the invention under sunlight (especially ultraviolet light and visible light)
The degradation of organic contamination model object has good catalytic performance, especially significant to rhodamine B degradation effect.With wide
Market application prospect.
Detailed description of the invention
Fig. 1 is X-ray diffraction (XRD) map of the CdS nanometer snowflake photochemical catalyst sample of preparation.
Fig. 2 is scanning electron microscope (SEM) photo of the CdS nanometer snowflake photochemical catalyst sample of preparation.
Fig. 3 be preparation CdS nanometer snowflake photochemical catalyst sample low power under transmission electron microscope (TEM) photo.
Fig. 4 is high power transmission electron microscope (TEM) photo and partial enlargement of the CdS nanometer snowflake photochemical catalyst sample of preparation
High-resolution-ration transmission electric-lens (HRTEM) photo.
Fig. 5 is the CdS nanometer snowflake photochemical catalyst sample of preparation in ultraviolet light (a), it is seen that the degradation under light (b) illumination
Figure.
Specific embodiment
The content of present invention is described in detail combined with specific embodiments below.Example as described below be only it is of the invention compared with
Good embodiment, is not intended to limit the present invention in any form, according to the technical essence of the invention to implementation
Any simple modification that mode is made, equivalent variations and modification, belong in the range of technical solution of the present invention.
The present invention be using raw material or reagent be conventional commercial product.
Embodiment 1:
(1) two water cadmium acetates, thiocyanic acid are weighed respectively for the ratio of 2:3 (two water cadmium acetates: ammonium thiocyanate) in mass ratio
Ammonium, composition mixture, then ratio takes 1 part of two water cadmium acetate+ammonium thiocyanate by weight, is dissolved in 100 parts of deionized waters, stirring
30min ± 5min makes it completely dissolved, and then proceedes to that 0.5 part of glacial acetic acid is added, continues to stir evenly 10 ± 5min and fall back
In thermal response kettle, compactedness is controlled the 80% of reactor volume, is then sealed hydrothermal reaction kettle, is put it into drying box,
Make hydrothermal temperature control at 200 DEG C, the reaction time controls in 20h.
(2) after reaction then cooled to room temperature, products therefrom dehydrated alcohol repeated flushing to neutrality are taken out
Filter, it is dry, obtain CdS nanometers of snowflake photocatalyst powders；
By the German Brooker D8X- x ray diffractometer x analysis (knot of resulting CdS nanometers of snowflake photocatalyst powder sample
Fruit sees Fig. 1)；By XRD spectrum it can be seen that it is that CdS is nanocrystalline that prepared photochemical catalyst, which prepares sample, and in PDF card number
77-2306 fits like a glove, and the table cadmium sulfide crystal phase is hexagonal phase.
By resulting CdS nanometers of snowflake photocatalyst powder sample with Czech's TESCAN VEGA3 scanning electron microscope into
Row morphology analysis (result is shown in Fig. 2)；Resulting CdS nanometers of snowflake photocatalyst powder sample JEOL company of Japan is produced
JEM 2100F type transmission electron microscope is observed (result is shown in Fig. 3), and under sample part high power and high resolution mode
It observes (result is shown in Fig. 4)；It is nanocrystalline to can be seen that the CdS by above-mentioned stereoscan photograph and transmission electron microscope photo, is in six
Side shape snow-shaped diameter of movement is 5 μm ± 1 μm；It can be seen that the CdS nanometers of snowflake additionally by high-resolution-ration transmission electric-lens picture
Main exposed crystal face be 002 face.
Resulting CdS nanometers of snowflake photocatalyst powder sample ultraviolet light (UV) and visible light (Vis) are irradiated lower pair
Rhodamine B is degraded (result is shown in Fig. 5 a and 5b).It can be seen that from photocatalytic degradation curve and utilize resulting CdS nanometers
Snowflake photocatalyst powder sample degrades to rhodamine B solution under ultraviolet light (UV) and visible light (Vis) irradiation,
It is degradable to 100% after 20min, 80min irradiation respectively.
Embodiment 2:
(1) range is that 1:1 (two water cadmium acetates: ammonium thiocyanate) weigh two water cadmium acetates, thiocyanic acid respectively in mass ratio
Ammonium, composition mixture, then ratio takes 1 part of two water cadmium acetate+ammonium thiocyanate by weight, is dissolved in 100 parts of deionized waters, stirring
30min ± 5min makes it completely dissolved, and then proceedes to that 0.5 part of glacial acetic acid is added, continues to stir evenly 10 ± 5min and fall back
In thermal response kettle, compactedness is controlled the 50% of reactor volume, is then sealed hydrothermal reaction kettle, is put it into drying box,
Make hydrothermal temperature control at 150 DEG C, the reaction time controls in 10h.
(2) after reaction then cooled to room temperature, products therefrom dehydrated alcohol repeated flushing to neutrality are taken out
Filter, it is dry, obtain CdS nanometers of snowflake photocatalyst powders；
Embodiment 3:
(1) range is that the ratio of 2:5 (two water cadmium acetates: ammonium thiocyanate) weighs two water cadmium acetates, sulphur respectively in mass ratio
Ammonium cyanate, composition mixture, then ratio takes 1.2 part of two water cadmium acetate+ammonium thiocyanate by weight, is dissolved in 100 parts of deionized waters
In, stirring 30min ± 5min makes it completely dissolved, and then proceedes to that 0.7 part of glacial acetic acid is added, continues after stirring evenly 10 ± 5min
It pours into hydrothermal reaction kettle, compactedness is controlled the 60%% of reactor volume, is then sealed hydrothermal reaction kettle, is put it into dry
In dry case, make hydrothermal temperature control at 220 DEG C, the reaction time controls in 15h.
(2) after reaction then cooled to room temperature, products therefrom dehydrated alcohol repeated flushing to neutrality are taken out
Filter, it is dry, obtain CdS nanometers of snowflake photocatalyst powders；
Embodiment 4:
(1) range is that the ratio of 2:3 (two water cadmium acetates: ammonium thiocyanate) weighs two water cadmium acetates, sulphur respectively in mass ratio
Ammonium cyanate, composition mixture, then ratio takes 1 part of two water cadmium acetate+ammonium thiocyanate by weight, is dissolved in 100 parts of deionized waters,
Stirring 30min ± 5min makes it completely dissolved, and then proceedes to that 0.5 part of glacial acetic acid is added, and continues to fall after stirring evenly 10 ± 5min
Enter in hydrothermal reaction kettle, compactedness is controlled the 70% of reactor volume, is then sealed hydrothermal reaction kettle, is put it into drying box
In, make hydrothermal temperature control at 160 DEG C, the reaction time controls in 18h.
(2) after reaction then cooled to room temperature, products therefrom dehydrated alcohol repeated flushing to neutrality are taken out
Filter, it is dry, obtain CdS nanometers of snowflake photocatalyst powders.
Claims (6)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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