CN105032435A - Preparation method of cobalt-zinc oxide composite catalyst - Google Patents
Preparation method of cobalt-zinc oxide composite catalyst Download PDFInfo
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- CN105032435A CN105032435A CN201510324603.1A CN201510324603A CN105032435A CN 105032435 A CN105032435 A CN 105032435A CN 201510324603 A CN201510324603 A CN 201510324603A CN 105032435 A CN105032435 A CN 105032435A
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Abstract
The invention provides a preparation method of a cobalt-zinc oxide composite catalyst. The preparation method comprises the following steps: (1) taking 2.5891g of ZnCl2, and dissolving ZnCl2 in 30mL of deionized water so as to obtain a ZnCl2 solution after ZnCl2 is completely dissolved; (2), adding 15g of glucose into the heated ZnCl2 solution once while stirring so as to ensure that the glucose is rapidly dissolved, thereby obtaining a solution X; (3), adding 0.2811g of CoSO4.7H2O into the heated solution X once while stirring, and further heating to evaporate the moisture, thereby obtaining a brownish black solid; and (4), drying the brownish black solid in a drying box at a temperature of 100 DEG C for 8 hours, transferring to an evaporation dish, putting the evaporation dish into a calcining box at a temperature of 600 DEG C, and calcining for 4 hours so as to obtain the cobalt-zinc oxide composite catalyst. The cobalt-zinc oxide composite catalyst is capable of efficiently catalyzing Oxone to degrade no less than 25mg.L<-1> rhdamine B wastewater under sunlight, has the advantages of high adsorption catalysis capability, stable performance, no toxicity, high efficiency, low price and the like, can be applied to degradation of organic pollutants which are difficult in biological degradation, and has relatively high market application prospect.
Description
Technical field
The invention belongs to catalysis material technical field, be specifically related to a kind of can the preparation method of cobalt-zinc oxide composite catalyst of efficient catalytic Oxone rhodamine B degradation waste water from dyestuff.
Background technology
Rhodamine B take xanthene as the fluorescent dye of parent, is widely used in the aspects such as food dyeing, fluorescence labeling and dye coloring because it has nonselective tinting strength, tinting power and feature not easy to fade.But toxicologic study subsequently shows: rhodamine B has potential carcinogenic and mutagenicity, now forbidden using as food additives by China.Rhdamine B waste water is also one of typical difficult for biological degradation organic wastewater, adopts conventional biological treatment removal effect not ideal enough.
Oxone (2KHSO
5kHSO
4k
2sO
4) be the trade name of peroxosulphuric hydrogen potassium complex salt, its active material is single peroxosulphuric hydrogen potassium KHSO
5.Due to a SO
3 ?replace the unique texture that HOOH forms asymmetric peroxide, make it be easy to excite and produce a large amount of potentiometric titrations (SO
4 -).Oxone/Co
2+a kind of oxidation system being similar to Fenton reagent, transition metal Co
2+can catalysis Oxone produce in a large number active, oxidability is strong and the SO of non-selectivity
4 -organic pollution materials exhaustive oxidation in water body is CO by free radical
2, H
2o and inorganic salts.This technology is high because for the treatment of effeciency, especially in the removal of difficult for biological degradation pollutant, has excellent performance, makes it become the study hotspot of people's concern always.
Oxone/Co
2+in oxidation system, the water miscible cobaltous sulfate of normal employing is as catalyst, and cobaltous sulfate will be ionized into Co
2+be present in the aqueous solution, Co in course of reaction
2+sO can be impelled as catalyst
4 -a large amount of generations of free radical, thus ensure carrying out smoothly of oxidation reaction.The cobalt salt of solubility can after the completion of reaction with water discharge, but " cobalt " belongs to heavy metal element, can enrichment in vivo, can be accumulated, therefore have potential damaging effect to ecological environment and human health by food chain in human body.Experimental studies have found that: Oxone/Co
2+oxidation system to process waste water time pH value no requirement (NR), the in most cases better processing effect of centering waste water.Therefore in order to avoid the pollution of soluble heavy metal cobalt, in the present invention, with zinc chloride, glucose and cobaltous sulfate for raw material, prepared and do not found in the literature, water-fast within the scope of pH value 4-13, callable cobalt-zinc oxide composite catalyst.
Summary of the invention
The technical problem that the present invention solves there is provided a kind of preparation method of cobalt-zinc oxide composite catalyst, the oxidation system that obtained cobalt-zinc oxide composite catalyst and Oxone form can not only effective rhodamine B degradation waste water from dyestuff, and cobalt-zinc oxide composite catalyst can recycling, avoids secondary environmental pollution.
The present invention adopts following technical scheme for solving the problems of the technologies described above, and a kind of preparation method of cobalt-zinc oxide composite catalyst, is characterized in that comprising the following steps: (1) gets 2.5891gZnCl
2be dissolved in 30mL deionized water, completely to be dissolved, obtain ZnCl
2solution; (2) disposable ZnCl 15g glucose being joined heat
2in solution, limit edged stirs, and makes it dissolve rapidly, obtains solution X; (3) in the solution X of heating, disposablely 0.2811gCoSO is added
47H
2o, limit edged stirs, and continues heating evaporation moisture, obtains brownish black solid; (4) brownish black solid is put into the dry 8h of drying baker of 100 DEG C, be transferred in evaporating dish to be placed in 600 DEG C of calcining casees and calcine 4h and obtain cobalt-zinc oxide composite catalyst.
Cobalt-zinc oxide composite catalyst that the present invention obtains within the scope of pH value 4-13 under have insoluble preferably, there is good crystal formation and catalytic performance simultaneously, but also there is necessarily visible light-responded photocatalysis performance, can efficient catalytic Oxone degraded>=25mgL under sunshine
-1rhdamine B waste water, have absorb that catalytic is strong, stable performance, the advantage such as nontoxic and cost effective, the degraded of difficult for biological degradation organic pollution can be applied to, there is stronger market application foreground.
Accompanying drawing explanation
Fig. 1 is the field emission scanning electron microscope figure of cobalt-zinc oxide composite catalyst that embodiment 3 obtains, and its essential element contained is cobalt and oxygen;
Fig. 2 is the field emission scanning electron microscope figure of cobalt-zinc oxide composite catalyst that embodiment 3 obtains, and its essential element contained is zinc and oxygen.
Detailed description of the invention
By the following examples foregoing of the present invention is described in further details, but this should be interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following embodiment.All technology realized based on foregoing of the present invention all belong to scope of the present invention.
Embodiment 1
(1) 2.5891gZnCl is got
2be dissolved in 30mL deionized water, completely to be dissolved, obtain ZnCl
2solution; (2) disposable ZnCl 15g glucose being joined heat
2in solution, limit edged stirs, and makes it dissolve rapidly, obtains solution X; (3) in the solution X of heating, disposablely 0.2811gCoSO is added
47H
2o, limit edged stirs, and continues heating evaporation moisture, obtains brownish black solid; (4) brownish black solid is put into the dry 8h of drying baker of 100 DEG C, be transferred in evaporating dish to be placed in 600 DEG C of calcining casees and calcine 4h and obtain cobalt-zinc oxide composite catalyst that cobalt mass content is 5%.Under normal temperature indoor conditions by 0.01g cobalt-zinc oxide composite catalyst 15min to 25mgL
-1the degradation efficiency of rhdamine B waste water be 10.42%.
Embodiment 2
(1) 4.4067gZnCl is got
2be dissolved in 30mL deionized water, completely to be dissolved, obtain ZnCl
2solution; (2) disposable ZnCl 15g glucose being joined heat
2in solution, limit edged stirs, and makes it dissolve rapidly, obtains solution X; (3) in the solution X of heating, disposablely 0.2811gCoSO is added
47H
2o, limit edged stirs, and continues heating evaporation moisture, obtains brownish black solid; (4) brownish black solid is put into the dry 8h of drying baker of 100 DEG C, be transferred in evaporating dish to be placed in 600 DEG C of calcining casees and calcine 4h and obtain cobalt-zinc oxide composite catalyst that cobalt mass content is 3%.0.01molL under normal temperature indoor conditions
-1in the oxidation system that Oxone solution and 0.005g cobalt-zinc oxide composite catalyst form, 13min is to 25mgL
-1the degradation efficiency of rhdamine B waste water be 94.5%.
Embodiment 3
(1) 2.5891gZnCl is got
2be dissolved in 30mL deionized water, completely to be dissolved, obtain ZnCl
2solution; (2) disposable ZnCl 15g glucose being joined heat
2in solution, limit edged stirs, and makes it dissolve rapidly, obtains solution X; (3) in the solution X of heating, disposablely 0.2811gCoSO is added
47H
2o, limit edged stirs, and continues heating evaporation moisture, obtains brownish black solid; (4) brownish black solid is put into the dry 8h of drying baker of 100 DEG C, be transferred in evaporating dish to be placed in 600 DEG C of calcining casees and calcine 4h and obtain cobalt-zinc oxide composite catalyst that cobalt mass content is 5%.0.01molL under normal temperature indoor conditions
-1in the oxidation system that Oxone solution and 0.005g cobalt-zinc oxide composite catalyst form, 13min is to 25mgL
-1the degradation efficiency of rhdamine B waste water be 99.58%.
Embodiment 4
(1) 1.8107gZnCl is got
2be dissolved in 30mL deionized water, completely to be dissolved, obtain ZnCl
2solution; (2) disposable ZnCl 15g glucose being joined heat
2in solution, limit edged stirs, and makes it dissolve rapidly, obtains solution X; (3) in the solution X of heating, disposablely 0.2811gCoSO is added
47H
2o, limit edged stirs, and continues heating evaporation moisture, obtains brownish black solid; (4) brownish black solid is put into the dry 8h of drying baker of 100 DEG C, be transferred in evaporating dish to be placed in 600 DEG C of calcining casees and calcine 4h and obtain cobalt-zinc oxide composite catalyst that cobalt mass content is 7%.0.01molL under normal temperature indoor conditions
-1in the oxidation system that Oxone solution and 0.005g cobalt-zinc oxide composite catalyst form, 13min is to 25mgL
-1the degradation efficiency of rhdamine B waste water be 97.37%.
Embodiment above describes general principle of the present invention, principal character and advantage; the technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; under the scope not departing from the principle of the invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the scope of protection of the invention.
Claims (1)
1. a preparation method for cobalt-zinc oxide composite catalyst, is characterized in that comprising the following steps: (1) gets 2.5891gZnCl
2be dissolved in 30mL deionized water, completely to be dissolved, obtain ZnCl
2solution; (2) disposable ZnCl 15g glucose being joined heat
2in solution, limit edged stirs, and makes its rapid solution, obtains solution X; (3) in the solution X of heating, disposablely 0.2811gCoSO is added
47H
2o, limit edged stirs, and continues heating evaporation moisture, obtains brownish black solid; (4) brownish black solid is put into the dry 8h of drying baker of 100 DEG C, be transferred in evaporating dish to be placed in 600 DEG C of calcining casees and calcine 4h and obtain cobalt-zinc oxide composite catalyst.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09192496A (en) * | 1996-01-12 | 1997-07-29 | Matsushita Electric Works Ltd | Photocatalyst and self-cleaning articles having the same |
| CN101947454A (en) * | 2010-09-08 | 2011-01-19 | 中南大学 | Transitional metal-doped zinc oxide mesoporous material with visible light catalytic activity and preparation method thereof |
| CN104275173A (en) * | 2014-07-30 | 2015-01-14 | 浙江师范大学 | Carbon-coated metal-doped zinc oxide composite photocatalysis nano material and preparation method thereof |
-
2015
- 2015-06-15 CN CN201510324603.1A patent/CN105032435A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09192496A (en) * | 1996-01-12 | 1997-07-29 | Matsushita Electric Works Ltd | Photocatalyst and self-cleaning articles having the same |
| CN101947454A (en) * | 2010-09-08 | 2011-01-19 | 中南大学 | Transitional metal-doped zinc oxide mesoporous material with visible light catalytic activity and preparation method thereof |
| CN104275173A (en) * | 2014-07-30 | 2015-01-14 | 浙江师范大学 | Carbon-coated metal-doped zinc oxide composite photocatalysis nano material and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| QINGKONG CHEN等: "Combination of heterogeneous Fenton-like reaction and photocatalysis using Co–TiO2 nanocatalyst for activation of KHSO5 with visible light irradiation at ambient conditions", 《JOURNAL OF ENVIRONMENTAL SCIENCES》 * |
| QINGKONG CHEN等: "Synergistic effect of bifunctional Co–TiO2 catalyst on degradation of Rhodamine B: Fenton-photo hybrid process", 《CHEMICAL ENGINEERING JOURNAL》 * |
| 欧阳林莉等: "钴掺杂氧化锌纳米材料的制备、表征及可见光光催化性能研究", 《湖南有色金属》 * |
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Application publication date: 20151111 |