TiO2/Co3O4复合纳米颗粒的制备及其光催化制氢性能

doi:10.15541/jim20160016

无机材料学报 ›› 2016, Vol. 31 ›› Issue (8): 841-844.DOI: 10.15541/jim20160016

TiO₂/Co₃O₄复合纳米颗粒的制备及其光催化制氢性能

马雅婷, 李巧玲

(中北大学理学院, 太原 030051)

收稿日期:2016-01-06 修回日期:2016-03-04 出版日期:2016-08-20 网络出版日期:2016-07-20
作者简介:马雅婷(1990–), 女, 硕士研究生. E-mail: yatingm@163.com
基金资助:
国家自然科学基金(51272239, 20871108);山西省留学基金(2014-重点6)

Preparation and Characterization of TiO₂/Co₃O₄ Nanocomposites and Their Photocatalytic Activity for Hydrogen Evolution

MA Ya-Ting, LI Qiao-Ling

(School of Science, North University of China, Taiyuan 030051, China)

Received:2016-01-06 Revised:2016-03-04 Published:2016-08-20 Online:2016-07-20
About author:MA Ya-Ting. E-mail: yatingm@163.com
Supported by:
National Natural Science Foundation of China (51272239, 20871108);Study Abroad Fund Project of Shanxi Province (2014-6)

摘要/Abstract

摘要：

通过碳辅助法和溶胶-凝胶法制备了具有可见光下光催化制氢性能的TiO₂/Co₃O₄复合纳米颗粒。采用X射线衍射仪(XRD)、透射电子显微镜(TEM)和高分辨率透射电子显微镜(HRTEM), 以及紫外可见分光光度计表征了复合纳米颗粒的晶体结构、微观形貌和紫外-可见光谱吸收能力。结果表明, 制备的复合纳米颗粒具有良好的晶型、结构以及紫外可见光吸收能力。实验测试了TiO₂/Co₃O₄复合纳米颗粒在模拟太阳光下的光催化制氢性能, 并研究了其光催化制氢的可重复利用性。结果表明, 在模拟太阳光照射下, 该复合纳米颗粒催化纯水产生氢气的速率约为8.25 μmol/(g·h), 且该复合纳米颗粒具有良好的可重复利用性。

关键词: 二氧化钛, 四氧化三钴, 复合纳米颗粒, 光催化制氢

Abstract:

TiO₂/Co₃O₄ nanocomposites with photocatalytic activity for hydrogen evolution under visible light were prepared via carbon assistant method and Sol-Gel method. X-Ray Diffraction (XRD), Transmission Electron Microscope(TEM), High Resolution Transmission Electron Microscope(HRTEM) and UV-Vis spectrophotometer were used to characterize the samples’ crystal structure, morphology and absorptivity of ultraviolet and visible light. The characterization results demonstrate that the prepared nanocomposites have good crystal form, structure and absorptivity of both ultraviolet and visible light. The photocatalytic activity of TiO₂/Co₃O₄ nanocomposites for hydrogen evolution under simulated sunlight was tested and their reusability was also investigated. The results show that the photocatalytic hydrogen evolution of pure water over the TiO₂/Co₃O₄ nanocomposites is about 8.25 μmol/(g·h) under simulated sunlight. And the nanocomposites possess ideal reusability.

Key words: titanium dioxide, cobalt oxide, nanocomposite, hydrogen evolution under photocatalysis

中图分类号:

TB383

马雅婷, 李巧玲. TiO₂/Co₃O₄复合纳米颗粒的制备及其光催化制氢性能[J]. 无机材料学报, 2016, 31(8): 841-844.

MA Ya-Ting, LI Qiao-Ling. Preparation and Characterization of TiO₂/Co₃O₄ Nanocomposites and Their Photocatalytic Activity for Hydrogen Evolution[J]. Journal of Inorganic Materials, 2016, 31(8): 841-844.

图/表 6

图1 Co3O4纳米颗粒及TiO2/Co3O4复合纳米颗粒的制备路线图

Fig. 1 Preparation routes for Co3O4 nanoparticles and TiO2/Co3O4 nanoparticles

图2 (a)Co3O4、(b)TiO2和(c)TiO2/Co3O4纳米颗粒的XRD图谱

Fig. 2 XRD patterns of (a) Co3O4, (b) TiO2 and (c) TiO2/ Co3O4 nanoparticles

图3 TiO2/Co3O4 复合纳米颗粒不同放大倍率的TEM照片(a, b)和HRTEM照片(c)

Fig. 3 Different magnificant TEM images (a, b), and HRTEM image (c) of TiO2/Co3O4 nanocomposites

图4 Co3O4、TiO2和TiO2/Co3O4纳米颗粒的紫外可见光谱图

Fig. 4 UV-Vis spectra of Co3O4, TiO2 and TiO2/Co3O4 nanoparticles

图5 Co3O4、TiO2和TiO2/Co3O4 复合纳米颗粒的光催化制氢性能

Fig. 5 Photocatalytic hydrogen evolution over Co3O4, TiO2 and TiO2/Co3O4 nanocomposites

图6 TiO2/Co3O4 复合纳米颗粒的光催化制氢循环测试结果

Fig. 6 Cycling photocatalytic hydrogen evolution over TiO2/Co3O4 nanocomposites

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TiO₂/Co₃O₄复合纳米颗粒的制备及其光催化制氢性能

Preparation and Characterization of TiO₂/Co₃O₄ Nanocomposites and Their Photocatalytic Activity for Hydrogen Evolution

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