Preparation of Composite Catalyst SiC-CdLa2S4 and Its Application in Photocatalytic Decomposition of Water Hydrogen Production

CUI Yu-min; SHI Rui-juan; LI Hui-quan; MIAO Hui

doi:10.3788/fgxb20163701.0007

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Preparation of Composite Catalyst SiC-CdLa₂S₄ and Its Application in Photocatalytic Decomposition of Water Hydrogen Production

更新时间：2020-08-12

- Preparation of Composite Catalyst SiC-CdLa₂S₄ and Its Application in Photocatalytic Decomposition of Water Hydrogen Production
- Chinese Journal of Luminescence Vol. 37, Issue 1, Pages: 7-12(2016)
- 作者机构：
  
  1. 阜阳师范学院化学与材料工程学院,安徽阜阳,236037
  2. 安徽环境污染物降解与监测省级实验室,安徽阜阳,236037
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20163701.0007
  CLC： O634
- Received：02 September 2015，
  
  Revised：11 November 2015，
  
  Published：10 January 2016
- 稿件说明：
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崔玉民, 师瑞娟, 李慧泉等. 催化剂SiO2/CNI的制备及其在光解水制氢领域中的应用[J]. 发光学报, 2016,37(1): 7-12

CUI Yu-min, SHI Rui-juan, LI Hui-quan etc. Preparation of Composite Catalyst SiC-CdLa2S4 and Its Application in Photocatalytic Decomposition of Water Hydrogen Production[J]. Chinese Journal of Luminescence, 2016,37(1): 7-12
崔玉民, 师瑞娟, 李慧泉等. 催化剂SiO2/CNI的制备及其在光解水制氢领域中的应用[J]. 发光学报, 2016,37(1): 7-12 DOI： 10.3788/fgxb20163701.0007.

CUI Yu-min, SHI Rui-juan, LI Hui-quan etc. Preparation of Composite Catalyst SiC-CdLa2S4 and Its Application in Photocatalytic Decomposition of Water Hydrogen Production[J]. Chinese Journal of Luminescence, 2016,37(1): 7-12 DOI： 10.3788/fgxb20163701.0007.

摘要

以二氰二胺和碘化铵为前驱体

采用水浴-焙烧方法首次制备了CNI与SiO

不同质量比的SiO

/CNI复合光催化剂。采用X射线衍射(XRD)、透射电子显微镜(TEM)、X射线光电子能谱(XPS)、光致发光光谱(PL)和紫外-可见漫反射光谱(UV-Vis DRS)等对催化剂进行了表征。实验结果表明

与CNI相比

CNI/SiO

复合光催化剂具有更高的光催化活性。当SiO

与CNI的质量比为1:15时

SiO

/CNI催化剂样品的光解水产氢活性最高

光解水产氢速率为88.6mol/h。SiO

/CNI(1:15)样品之所以具有高活性主要有两方面原因:适量的SiO

与CNI复合可以使光生电子-空穴对的复合得到显著的抑制;SiO

与CNI复合使得SiO

/CNI对可见光(200~600 nm)吸收能力增强

且其吸收带边向长波方向移动。

Abstract

Using dicyanodiamine and ammonium iodide as the precursors respectively

the SiO

/CNI composite photocatalysts with different mass ratio of SiO

and CNI were successfully prepared by a bath-calcination process. The samples were characterized by X-ray diffraction(XRD)

transmission electron microscopy (TEM)

X-ray photoelectron spectroscopy(XPS)

photoluminescence(PL) and UV-Vis diffuse reflection spectra(UV-Vis DRS)

respectively. The results show that the photocatalytic activity of the SiO

/CNI samples are greatly enhanced

compared with pure CNI. When the mass ratio of SiO

and CNI is 1:15

the activity of SiO

/CNI for photolysis water producing hydrogen is the highest

and the rate of photolysis water producing hydrogen of SiO

/CNI reaches 88.6mol/h. The enhanced photocatalytic activities can be mainly attributed to the fact that the proper composite of SiO

and CNI makes the recombination of the photoproduction electronic-hole pair be observably controlled

increases the absorption in 200-600 nm region and the absorption edge has a little shift to long wavelength.

关键词

Keywords

references

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