TiO2/Bi2O3纳米复合体的制备及可见光催化产氢性能

doi:10.7517/j.issn.1674-0475.2015.05.426

影像科学与光化学 ›› 2015, Vol. 33 ›› Issue (5): 426-433.DOI: 10.7517/j.issn.1674-0475.2015.05.426

TiO₂/Bi₂O₃纳米复合体的制备及可见光催化产氢性能

史丽娜^1,2, 曲阳², 李志君², 孙莉群², 井立强^1,2

1. 黑龙江大学中俄学院, 黑龙江哈尔滨 150080;
2. 黑龙江大学功能无机材料化学教育部重点实验室, 黑龙江哈尔滨 150080

收稿日期:2015-07-02 修回日期:2015-07-20 出版日期:2015-09-16 发布日期:2015-09-16
通讯作者: 井立强
基金资助:
国家自然科学联合基金重点项目(U1401245)、973计划前期研究专项课题(2014CB660814)、教育部创新团队发展计划项目 (IRT1237)和教育部科学技术研究项目(213011A)资助

Synthesis of TiO₂/Bi₂O₃ Nanocomposites for Visible Light Driven Photocatalytic H₂ Production

SHI Lina^1,2, QU Yang², LI Zhijun², SUN Liqun², JING Liqiang^1,2

1. Chinese-Russian College of Heilongjiang University, Harbin 150080, Heilongjiang, P. R. China;
2. Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, Harbin 150080, Heilongjiang, P. R. China

Received:2015-07-02 Revised:2015-07-20 Online:2015-09-16 Published:2015-09-16

摘要/Abstract

摘要：

首先采用相分离的水解-溶剂热法制备了Bi₂O₃纳米粒子,然后利用简单的湿化学法在Bi₂O₃表面负载不同比例的TiO₂纳米颗粒,进而得到TiO₂/Bi₂O₃纳米复合体。通过气氛调控的表面光电压谱(SPS)等测试表明,表面负载适量的TiO₂后能够提高Bi₂O₃光生电荷分离。可见光催化产氢和降解污染物测试结果进一步证明,表面负载适量的TiO₂后可显著提高其可见光催化活性,其中Ti/Bi摩尔比为7%时具有最高的光催化活性。这主要归因于TiO₂具有较为合适的导带能级位置,可以接收Bi₂O₃在可见光激发下所产生的高能级电子,从而抑制光生电子-空穴对复合,并且维持了高能级电子较高的还原能力。

关键词: Bi₂O₃, TiO₂/Bi₂O₃纳米复合体, 光生电荷分离, 可见光光催化, 产氢

Abstract:

Bi₂O₃ nanoparticles were prepared by one-pot water-organic two-phase separated hydrolysis-solvothermal, and then TiO₂ nanoparticles with different molar ratio were loaded on the surface of Bi₂O₃ with facile wet chemical method to prepare TiO₂/Bi₂O₃ nanocomposites. The result of atmosphere controlled surface photovoltage spectrum (SPS) show that Bi₂O₃ loaded with suitable TiO₂ could improve the photoinduced charge separation. Both of visible light driven photocatalytic H₂ production and degradation of organic pollution efficiency of Bi₂O₃ after loaded with TiO₂ promoted significantly, that sample of 7T-B possess of the highest photocatalytic H₂ production efficiency. This may be attributed to the suitable conduction band of TiO₂ which could accept the high energy photoinduced electrons from Bi₂O₃ so that inhibit the recombination of photogenerate electron-hole pairs and maintain the high reduction of the high energy electrons.

Key words: Bi₂O₃, TiO₂/Bi₂O₃nanocomposites, photogenerated charge separation, visible light driven photocatalysis, hydrogen production

史丽娜, 曲阳, 李志君, 孙莉群, 井立强. TiO₂/Bi₂O₃纳米复合体的制备及可见光催化产氢性能[J]. 影像科学与光化学, 2015, 33(5): 426-433.

SHI Lina, QU Yang, LI Zhijun, SUN Liqun, JING Liqiang. Synthesis of TiO₂/Bi₂O₃ Nanocomposites for Visible Light Driven Photocatalytic H₂ Production[J]. Imaging Science and Photochemistry, 2015, 33(5): 426-433.

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TiO₂/Bi₂O₃纳米复合体的制备及可见光催化产氢性能

Synthesis of TiO₂/Bi₂O₃ Nanocomposites for Visible Light Driven Photocatalytic H₂ Production

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