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One-dimension Zn1-xCoxS solid solution and carbon nano-composite photocatalyst and preparation method thereof

A carbon nanocomposite, zn1-xcoxs technology, applied in the field of one-dimensional Zn1-xCoxS solid solution and carbon nanocomposite photocatalyst and its preparation, can solve the problems of limiting photocatalytic activity, improvement, harsh conditions, etc., and achieve strong photocatalysis Ability, simple process, high stability effect

Active Publication Date: 2016-09-28
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing preparation method requires high temperature and high pressure, harsh conditions, and the large particle size (about 100nm) caused by agglomeration limits the further improvement of its photocatalytic activity

Method used

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  • One-dimension Zn1-xCoxS solid solution and carbon nano-composite photocatalyst and preparation method thereof
  • One-dimension Zn1-xCoxS solid solution and carbon nano-composite photocatalyst and preparation method thereof
  • One-dimension Zn1-xCoxS solid solution and carbon nano-composite photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Weigh 4.7598g Zn(NO 3 ) 2 ·6H 2 O, 1.1641g Co(NO 3 ) 2 ·6H 2 O and 6.4044g sodium salicylate, Zn(NO 3 ) 2 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 O was dissolved in 100mL deionized water to prepare a mixed salt solution, sodium salicylate was dissolved in 150mL deionized water to prepare a salt solution, and the prepared two salt solutions were poured into a four-necked flask, and an electric stirrer was started Rotate at a constant speed to mix the salt solution evenly;

[0024] 2) Weigh 2g NaOH and dissolve it in 100mL deionized water to prepare lye, add it dropwise to the mixed salt solution at a rate of 2 drops / s, a pink precipitate gradually precipitates in the solution, and adjust the pH value of the solution to 6.8 , raised the temperature to 90°C, and reacted at this temperature for 24 hours. After the reaction, the precipitate was taken out, centrifuged, washed 3 times with deionized water, and the product was dried at 50°C for 6 hours to obtain salicylate ...

Embodiment 2

[0034] 1) Weigh 5.3548g Zn(NO 3 ) 2 ·6H 2 O, 0.5821g Co(NO 3 ) 2 ·6H 2 O and 9.6066g sodium salicylate, Zn(NO 3 ) 2 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 O was dissolved in 100mL deionized water to prepare a mixed salt solution, sodium salicylate was dissolved in 150mL deionized water to prepare a salt solution, and the prepared two salt solutions were poured into a four-necked flask, and an electric stirrer was started Rotate at a constant speed to mix the salt solution evenly;

[0035] 2) Weigh 2g NaOH and dissolve it in 100mL deionized water to make lye, add it dropwise to the mixed salt solution at a rate of 2 drops / s, a pink precipitate gradually precipitates in the solution, and adjust the pH value of the solution to 6.7 , raised the temperature to 90°C, and reacted at this temperature for 24 hours. After the reaction, the precipitate was taken out, centrifuged, washed 3 times with deionized water, and the product was dried at 50°C for 6 hours to obtain a one-dimensio...

Embodiment 3

[0040] 1) Weigh 4.1649g Zn(NO 3 ) 2 ·6H 2 O, 1.7462g Co(NO 3 ) 2 ·6H 2 O and 9.6066g sodium salicylate, Zn(NO 3 ) 2 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 O was dissolved in 100mL deionized water to prepare a mixed salt solution, sodium salicylate was dissolved in 150mL deionized water to prepare a salt solution, and the prepared two salt solutions were poured into a four-necked flask, and an electric stirrer was started Rotate at a constant speed to mix the salt solution evenly;

[0041] 2) Weigh 2g NaOH and dissolve it in 100mL deionized water to make lye, add it dropwise to the mixed salt solution at a rate of 2 drops / s, a pink precipitate gradually precipitates in the solution, and adjust the pH value of the solution to 6.7 , raised the temperature to 90°C, and reacted at this temperature for 24 hours. After the reaction, the precipitate was taken out, centrifuged, washed 3 times with deionized water, and the product was dried at 50°C for 6 hours to obtain a one-dimensio...

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Abstract

The invention discloses a one-dimension Znl-xCoxS solid solution and carbon nano-composite photocatalyst and a preparation method thereof. The preparation method comprises the following steps: synthesizing a layered dual-metal zinc-cobalt hydroxide precursor of salicylic acid root intercalation from a zinc salt, a cobalt salt and salicylic acid serving as raw materials according to a co-precipitation method; performing a gas-solid phase reaction on the precursor and H2S gas; and roasting in an inertia gas atmosphere to obtain the one-dimensional ZnL-xCoxS solid solution and carbon nano-composite photocatalyst. The catalyst has high stability and a large specific surface area, and nanoparticles of the solid solution are uniform in sizes and have small particle diameters being 3-5 nanometers. Graphite carbon is taken as a substrate, so that the one-dimension feature of the material is kept, and the conductivity and stability of the material are improved remarkably. The catalyst has high photocatalytic performance, and particularly has remarkable photocatalytic activity under visible light. Compared with the conventional synthetic method, the preparation method has the advantages that a template agent and a modifier do not need to be introduced, and the photocatalyst has the characteristics of environmental friendliness, economical efficiency, adoption of readily-available raw materials, low cost, and suitability for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of photocatalyst preparation, in particular to a one-dimensional Zn 1-x co x S solid solution and carbon nanocomposite photocatalyst and preparation method thereof. Background technique [0002] ZnS is a semiconductor material with a direct wide band gap, and has a large band gap (3.66eV). As a transition metal sulfide, ZnS has many excellent properties, among which photocatalysis is one of its unique properties. ZnS has strong photocatalytic activity in the presence of ultraviolet light excitation and the presence of sacrificial agents, but the wide band gap of ZnS limits its absorption of visible light. Since the solid solution can adjust the valence band and conduction band position of the semiconductor at the same time, the solid solution nanoparticles formed by replacing the zinc ions in ZnS with other metal cations can narrow the forbidden band width and expand its absorption of visible light, there...

Claims

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Application Information

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IPC IPC(8): B01J27/043B82Y30/00B82Y40/00C02F1/30C02F101/38
CPCB82Y30/00B82Y40/00C02F1/30B01J27/043C02F2305/10C02F2101/40B01J35/33B01J35/40B01J35/613B01J35/615B01J35/39
Inventor 王连英刘改利王东阳魏博文
Owner BEIJING UNIV OF CHEM TECH
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