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Photocatalyst for selective oxidation of toluene and toluene derivatives

A photocatalyst, gr-cds-tio2 technology, applied in the field of catalyst preparation and sustainable development of the environment and energy, to achieve the effect of simple production process, high photocatalytic activity and selectivity, and easy recycling

Active Publication Date: 2013-10-23
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the design of GR-CdS-TiO 2 No report on photocatalytic selective oxidation of toluene and its derivatives

Method used

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  • Photocatalyst for selective oxidation of toluene and toluene derivatives
  • Photocatalyst for selective oxidation of toluene and toluene derivatives
  • Photocatalyst for selective oxidation of toluene and toluene derivatives

Examples

Experimental program
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Effect test

Embodiment 1

[0028] 200 mL of 6.0 mM Na 2 S solution was slowly added dropwise to 200 mL 5.0 mM Cd(Ac) 2 solution, continued to stir for 36 h, then filtered, washed, and dried to obtain a CdS sample. The sample was dispersed in deionized water, placed in a reactor at 120 °C for 12 h, accounting for 80% of the reactor, then cooled, filtered, washed, and dried to obtain a CdS photocatalyst. Mix 8 mg of CdS catalyst, 1.5 mL of BTF pre-passed through oxygen, and 0.1 mmol of toluene or its derivatives, and place it under visible light (>420 nm) for 10 h. The conversion rate of toluene is 33%, and the conversion rate of p-chlorotoluene is 27%, the conversion rate of p-methoxytoluene is 36%, the conversion rate of p-nitrotoluene is 29%, the conversion rate of p-fluorotoluene is 30%, the conversion rate of p-xylene is 39%, the selection of corresponding aldehyde Sex is 100%.

Embodiment 2

[0030] 200 mL of 6.0 mM Na 2 S solution was slowly added dropwise to 200 mL 5.0 mM Cd(Ac) 2 solution, continue to stir for 36 h, then filter, wash, and dry to obtain CdS solid; disperse a certain amount of GO in water, add a certain amount of CdS solid (m / m 0.01-0.3:1) in proportion, and stir together for 24 h. Then, the self-assembled sample was obtained by rotary evaporation in a water bath at 50°C; the self-assembled sample was dispersed in deionized water, placed in a reactor at 120°C for 12 h, accounting for 80% of the reactor, then cooled, filtered, washed, and dried Obtain GR-CdS photocatalyst. Mix 8 mg of 5% GR-CdS catalyst, 1.5 mL of BTF pre-passed through oxygen, and 0.1 mmol of toluene or its derivatives, and place it under visible light (>420 nm) for 10 h. The conversion rate of toluene is 53%, and p-chlorotoluene The conversion rate of p-methoxytoluene is 52%, the conversion rate of p-methoxytoluene is 57%, the conversion rate of p-nitrotoluene is 51%, the conve...

Embodiment 3

[0032] 200 mL of 6.0 mM Na 2 S solution was slowly added dropwise to 200 mL 5.0 mM Cd(Ac) 2 solution, continue to stir for 36 h, then filter, wash, and dry to obtain CdS solid; disperse a certain amount of GO in water; disperse a certain amount of liquid n-butyl titanate in absolute ethanol, seal, and poke a few a small hole, stirred for 48 h to obtain TiO 2 Colloid; CdS solid, TiO 2Colloid and GO aqueous solution were mixed according to a certain ratio (m / m 45-94:1-50:5), stirred together for 24 hours, and then 50°C water bath was rotated to dryness to obtain self-assembled samples; the self-assembled samples were dispersed in deionized water , placed in a reactor at 120°C for 12 h, accounting for 80% of the reactor, then cooled, filtered, washed, and dried to obtain GR-CdS-TiO 2 catalyst of light. 8 mg 5%GR-CdS-10%TiO 2 Catalyst, 1.5 mL of BTF pre-passed through oxygen and 0.1 mmol of toluene or its derivatives were mixed uniformly, placed under visible light (>420 nm) ...

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Abstract

The invention discloses a photocatalyst for selective oxidation of toluene and toluene derivatives. By taking Cd(Ac)2-H2O(1 / 2), Na2S-H2O(1 / 9), tetrabutyl titanate and graphene as raw materials, nano particle combined sheet-shaped CdS, TiO2 colloid and an aqueous solution of oxide graphene are respectively obtained, then subjected to vacuum automatic assembly, hydrothermal processing at 120 DEG C, cooling, filtering, washing and drying for obtaining of the visible light photocatalyst GR-CdS-TiO2. The compound photocatalyst GR-CdS-TiO2 is firstly applied to photocatalyzed selective oxidation of toluene and the toluene derivatives, and has high catalytic efficiency and corresponding aldehyde selectivity of 98%. The photocatalyst is simple in preparation, is applied to selective oxidation of toluene and the toluene derivatives by taking visible light as driving energy and oxygen as an oxidizing agent, and is beneficial to sustainable development of environment and energy.

Description

technical field [0001] The invention belongs to the field of catalyst preparation and the sustainable development of environment and energy, and specifically relates to a GR-CdS-TiO 2 Photocatalyst preparation and photocatalytic selective oxidation of toluene and its derivatives to the corresponding aldehydes. Background technique [0002] The increasingly scarce oil resources and the deteriorating environment force mankind to face two major issues, that is, the development of clean and renewable energy and the control of environmental pollution. With the strong support of the governments of various countries, photocatalytic oxidation technology is developing vigorously. On the one hand, it focuses on the basic and applied research of environmental pollution control such as water, air and soil. On the other hand, researches on hydrogen production by photolysis of water and dye-sensitized solar cells have also been carried out. With the emergence of energy and environmental...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04C07B41/06C07C45/36C07C47/54C07C47/55C07C201/12C07C205/44C07C47/565C07C47/542
Inventor 徐艺军张燕辉
Owner FUZHOU UNIV
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