Method for preparing photocatalyst of titanium dioxide carried by active carbon

A photocatalyst and titanium dioxide technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of TiO2 activity reduction, high preparation cost, and complicated process, so as to improve photocatalytic activity, The effect of simple equipment and simplified preparation process

Inactive Publication Date: 2005-11-16
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods usually combine TiO 2 Dispersed into the pores of the support, so that TiO 2 are extremely difficult to be excited by light,

Method used

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  • Method for preparing photocatalyst of titanium dioxide carried by active carbon
  • Method for preparing photocatalyst of titanium dioxide carried by active carbon
  • Method for preparing photocatalyst of titanium dioxide carried by active carbon

Examples

Experimental program
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Example Embodiment

[0026] Example 1

[0027] Put 40-60 mesh granular activated carbon into HNO with a concentration of 6mol / L 3 In the solution, boil at 373K for 1 hour to generate oxygen-containing functional groups on the surface of the activated carbon, wash with deionized water after cooling; put the above-mentioned activated carbon into a quartz reactor, feed nitrogen into the reactor, and control the flow rate of nitrogen to 100ml / min, then heated to 423K and maintained for 60 minutes; then heated the reactor to 873K; heated the butyl titanate to 523K, with nitrogen as the carrier gas, and the gas flow rate was 400ml / min, and the butyl titanate was loaded into the reactor In, TiO was deposited on the surface of activated carbon after the decomposition of butyl titanate 2 , After 12 hours of deposition, close the butyl titanate valve, blow nitrogen into the reactor to remove some residual precursors, and calcinate for 3 hours under the protection of nitrogen to prepare activated carbon-su...

Example Embodiment

[0028] Example 2

[0029] Put 40-60 mesh granular activated carbon into HNO with a concentration of 10mol / L 3 In the solution, boil at 573K for 2 hours to generate oxygen-containing functional groups on the surface of the activated carbon, wash with deionized water after cooling; put the above-mentioned activated carbon into a quartz reactor, feed nitrogen into the reactor, and control the nitrogen flow rate of 200ml / min, then heated to 523K and maintained for 15 minutes; then heated the reactor to 773K; heated the isopropyl titanate to 323K, with nitrogen as the carrier gas, the gas flow rate was 400ml / min, and the isopropyl titanate was loaded to In the reactor, TiO is deposited on the surface of activated carbon after the decomposition of isopropyl titanate 2 , After 6 hours of deposition, close the isopropyl titanate valve, blow nitrogen into the reactor to remove some residual precursors, and calcinate for 3 hours under the protection of nitrogen to prepare activated ca...

Example Embodiment

[0030] Example 3

[0031] Put 40-60 mesh granular activated carbon into HNO with a concentration of 1mol / L 3 In the solution, boil at 373K for 0.5h to generate oxygen-containing functional groups on the surface of the activated carbon, wash with deionized water after cooling; put the above-mentioned activated carbon into a quartz reactor, pass argon into the reactor, and control the argon The flow rate is 50ml / min, then heated to 323K and maintained for 30 minutes; then the reactor is heated to 1073K; the isopropyl titanate is heated to 423K, with argon as the carrier gas, the gas flow rate is 800ml / min, and the isopropyl titanate Propyl ester is loaded into the reactor, and TiO is deposited on the surface of activated carbon after decomposition of isopropyl titanate 2 , After 10 h of deposition, close the valve of isopropyl titanate, pass argon gas into the reactor to remove the remaining part of the precursor, and calcined for 3 h under the protection of argon gas to prepar...

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Abstract

A process for preparing the activated carbon carried TiO2 photocatalyst by organic chemical vapor deposition method includes treating activated carbon by nitric acid, using inertial gas to carry the hot Ti precursor into quartz reactor containing said activated carbon, depositing TiO2 onto surface of activated carbon, and calcining in inertial gas.

Description

technical field [0001] The invention relates to a preparation method of a supported titanium dioxide photocatalyst, in particular to a preparation method of an activated carbon supported titanium dioxide photocatalyst. Background technique [0002] In 1972, Japan Fujishima and Honda reported titanium dioxide (TiO 2 ) after the hydrolysis of single crystal electrodes, the research on semiconductor photocatalysis of organic matter in water has gradually become a research hotspot. TiO 2 Because of its low price, no secondary pollution, stable photochemical properties, and effective photocatalytic oxidation of almost all organic pollutants in water, it has attracted the attention of researchers. Currently using TiO 2 Suspension systems are usually used when degrading pollutants: nano-sized TiO 2 Ultrafine powder (the most commonly used is Degussa P25) is mixed into the reaction solution, and the purpose of mineralizing organic matter is achieved under the conditions of venti...

Claims

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Application Information

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IPC IPC(8): B01J21/06
Inventor 雷乐成张兴旺周明华
Owner ZHEJIANG UNIV
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