Preparation method of graphene compounded/metal ion doped defective semiconductor photocatalyst

A graphene composite and metal ion technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, non-metallic elements, etc., to achieve good dispersion, excellent photocatalytic performance, and process controllable effects

Inactive Publication Date: 2019-08-16
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the relatively high valence band energy and faster recombinati

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of graphene compounded/metal ion doped defective semiconductor photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] Example 1

[0019] (1) Prepare graphene oxide by optimized Hummers method. First, a strong acid and strong oxidant is used to oxidize the graphite flakes. During the reaction process, the graphite oxide with a higher degree of oxidation is prepared by controlling the adding mode of the oxidant, the reaction temperature and other factors. Then, in the aqueous solution, the graphite oxide was peeled off by ultrasonic action to prepare a monodisperse graphene oxide solution (1g / L).

[0020] (2) Weigh 0.1036 Zn(OAc) 2 ·2H 2 O, 0.2839g In(OAc) 3 And 0.00047g AgNO 3 Dissolve in 50 mL of deionized water, then add 0.5 mL of graphene oxide solution, sonicate for 30 min, then add 0.0687 g of L-cysteine ​​and sonicate for 30 min. After it is fully dissolved, transfer the solution to 100 mL of PTFE In the lining, add 0.1418g of thioacetamide, stir for 30min, and place the reactor at 160 o Hydrothermal reaction under C conditions for 6h. After cooling to room temperature naturally, th...

Example Embodiment

[0021] Example 2

[0022] As described in Example 1, the difference is that the amount of graphene oxide solution added in step (2) is adjusted to 1 mL, and the final catalyst is 0.5wt% RGO / Ag:ZnIn containing 0.5wt% RGO 2 S 4 .

Example Embodiment

[0023] Example 3

[0024] As described in Example 1, the difference is that the amount of graphene oxide solution added in step (2) is adjusted to 1.5 mL, and the final catalyst is 0.5wt% RGO / Ag:ZnIn containing 0.5wt% RGO 2 S 4 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a preparation method of a graphene compounded/metal ion doped defective semiconductor photocatalyst, and relates to a preparation method of a photocatalytic functional material. With a ternary sulfide ZnIn2S4 as a reference, Ag<+>, a zinc source, an indium source, a sulfur source and oxidized graphene are subjected to a reaction under a hydrothermal condition according toa certain molar ratio in order to produce the target photocatalyst. The visible light photocatalyst is definite in structure and composition, and the visible light spectral response range of ZnIn2S4 can be obviously enhanced through doping of Ag <+>; after the graphene is compounded with the graphene, the diffusion range of photon-generated carriers can be increased, so that recombination of photo-generated electron-hole pairs is inhibited, and the visible light catalytic activity is enhanced. The product is a promising visible light photocatalytic material.

Description

technical field [0001] The invention relates to a method for preparing a photocatalyst, in particular to a method for preparing a graphene composite metal ion-doped defect semiconductor photocatalyst. Background technique [0002] Hydrogen energy, as an environmentally friendly, clean and pollution-free new energy source, can be prepared by photocatalytic water splitting. In order to achieve efficient water splitting and hydrogen production, a large number of semiconductor photocatalysts for hydrogen production have been developed. Including TiO 2 Traditional photocatalysts including other oxide semiconductors can only absorb ultraviolet light accounting for only 5% of the solar spectrum due to their large band gap (>3.0eV). Therefore, one of the most critical challenges in this field is to develop visible-light active photocatalysts. [0003] In recent years, ZnIn 2 S 4 As an important component of Ⅱ-Ⅲ-Ⅳ ternary chalcogenides, due to its unique optical properties an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J27/04C01B3/04
CPCB01J27/04B01J35/004C01B3/042C01B2203/0277Y02E60/36
Inventor 徐振和高雨徐宝彤孙亚光丁茯
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap