Method for synthesizing attapulgite composite photocatalyst

A technology of attapulgite and synthesis method, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of low utilization rate of solar energy, difficulty in catalyst recovery, etc. , to achieve the effect of good catalytic effect, low cost and no environmental pollution

Inactive Publication Date: 2008-02-13
HUAIYIN TEACHERS COLLEGE
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AI Technical Summary

Problems solved by technology

However, the environment-friendly photocatalytic technology also has disadvantages such as difficulty in catalyst recovery and low utilization rate of solar energy.

Method used

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  • Method for synthesizing attapulgite composite photocatalyst
  • Method for synthesizing attapulgite composite photocatalyst
  • Method for synthesizing attapulgite composite photocatalyst

Examples

Experimental program
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Effect test

example 1

[0016] Example 1: Att-SnO was synthesized according to the following steps 2 -TiO 2 (1 / 3) composite photocatalyst:

[0017] a) Weigh 15 g of attapulgite and disperse it in 450 mL of deionized water, stir, ultrasonicate for 40 minutes, put it into a water bath and cook for 2 days to make attapulgite suspension;

[0018] b) Weigh m(SnCl 2 .2H 2 (O)=15g, add 600mL of dilute HCl with pH=3 to dissolve it, stir for a while; then add 30g of superfine attapulgite, stir for 2h to make it fully dispersed; use 2mol / L NH 3 ·H 2 O solution, adjust the pH of the solution to 7, stir for 2h, let stand and age for 1d, filter with suction, dry the precursor at 90°C, grind it and put it in a muffle furnace at 400°C for 6h to prepare Att-SnO 2 catalytic material.

[0019] c) Weigh 10gAtt-SnO 2 , put into 60mL n-butyl titanate / ethanol mixed solution with a volume ratio of 1 / 4, stir for 2 hours to make it fully dispersed; add dropwise an ethanol solution containing 5% deionized water until a...

example 2

[0026] Example 2: Att-SnO was synthesized according to the following steps 2 -TiO 2 (1 / 1) Composite photocatalyst:

[0027] a) Weigh 15g of attapulgite and disperse it in 300mL of deionized water, stir, ultrasonicate for 20min, put it in a water bath and cook for 1d to make attapulgite suspension;

[0028] b) Weigh m(SnCl 2 .2H 2 (O)=15g, add 600mL of dilute HCl with pH=1 to dissolve it, stir for a while; then add 15g of superfine attapulgite, stir for 1h to make it fully dispersed; use 1mol / L NH 3 ·H 2 O solution, adjust the pH of the solution to 4, stir for 1h, let stand and age for 1d, filter with suction, dry the precursor at 70°C, grind it and put it in a muffle furnace at 100°C for 6h to prepare Att-SnO 2 catalytic material.

[0029] c) Weigh 10gAtt-SnO 2 , put into 20mL n-butyl titanate / ethanol mixed solution with a volume ratio of 1 / 2, stir for 1h to fully disperse; add dropwise an ethanol solution containing 1% deionized water until a colloid is formed, and con...

example 3

[0030] Example 3: Att-SnO was synthesized according to the following steps 2 -TiO 2 (1 / 2) composite photocatalyst:

[0031] a) Weigh 15g of attapulgite and disperse it in 380mL of deionized water, stir, ultrasonicate for 30min, put it in a water bath and cook for 1.5d to make attapulgite suspension;

[0032] b) Weigh m(SnCl 2 .2H 2 (O)=15g, add 500mL of dilute HCl with pH=2 to dissolve it, stir for a while; then add 22g of superfine attapulgite, stir for 1.5h to make it fully dispersed; use 1.5mol / L NH 3 ·H 2 O solution, adjust the pH of the solution to 5, stir for 1.5h, stand and age for 1d, filter with suction, dry the precursor at 80°C, grind it and put it in a muffle furnace at 250°C for 4.5h to prepare Att-SnO 2 catalytic material.

[0033] c) Weigh 10gAtt-SnO 2 , put into 45mL n-butyl titanate / ethanol mixed solution with a volume ratio of 1 / 3, stir for 1.5h to fully disperse; add dropwise an ethanol solution containing 3% deionized water until a colloid is formed,...

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Abstract

The present invention discloses a synthesis method of an attapulgite composite photocatalyst. Firstly the attapulgite is stirred, ultrasonic treated and steam-cooked in deionized water to obtain an ultrafine attapulgite suspension; secondly a hydrochloric acid with the pH value from 1 to 3 dissolves SnCl2, and the ultrafine attapulgite is added into the solution, then NH3 {question mark} H2O is used to adjust the pH value to be 4 to 7, which makes Sn2+ gradually hydrolyze until forming a colloid, which is dried and calcined to remove the organic matters and crystal water to obtain a catalytic material of Att-SnO2; finally the Att-SnO2, in which nSnO2 / nTiO2 is 1 / 1-3, is added into the mixture solution of tetrabutyl titanate and ethanol, the cubage proportion of which is 1:2-4, and an ethanol solution with 1 percent to 5 percent of weight proportion of the deionized water is added to make the tetrabutyl titanate gradually hydrolyze until forming the colloid, which is calcined to obtain the attapulgite photocatalyst of Att-SnO2-TiO2. The attapulgite composite photocatalyst of the present invention has a good photodegradation effect as well as has the absorbability and dispersibility, and with convenient operation and low cost.

Description

technical field [0001] The invention relates to a semiconductor compound TiO 2 , SnO 2 The invention relates to a composite photocatalyst of attapulgite and attapulgite, in particular to a synthesis method of attapulgite composite photocatalyst. Background technique [0002] Attapulgite clay is a natural non-metallic clay mineral with attapulgite as the main component. It is a crystalline hydrated magnesium aluminum silicate mineral with a unique layer chain structure. It has a large specific surface area and chemical stability. Good, strong adsorption capacity and other characteristics, so it is widely used in all walks of life. For example, by using its strong adsorption capacity, decolorizers and adsorbents can be developed for decolorization and refining of animal and vegetable oils, as well as water treatment agents for sewage and waste water; by using its light weight and strong water absorption properties, it can be used to develop drying Agents and adsorbents; usi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/14B01J21/06B01J21/16
Inventor 张莉莉仲慧张维光庄季昌徐继明赵朴素
Owner HUAIYIN TEACHERS COLLEGE
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