Enhanced Photocatalytic Activity of NaBH4 Reduced BiFeO3 Nanoparticles for Rhodamine B Decolorization

被引：106
作者：
Di, Lijing [1 ,2 ]
Yang, Hua [1 ]
Xian, Tao [2 ]
Chen, Xiujuan [1 ]
机构：
[1] Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Non Ferrous Me, Lanzhou 730050, Gansu, Peoples R China
[2] Qinghai Normal Univ, Coll Phys & Elect Informat Engn, Xining 810008, Qinghai, Peoples R China
来源：
MATERIALS | 2017年 / 10卷 / 10期
基金：
中国国家自然科学基金;
关键词：
BiFeO3; oxygen vacancies; photocatalysis; OXYGEN VACANCIES; PHOTOELECTROCHEMICAL PERFORMANCE; NANOSTRUCTURES; TIO2; HYDROGENATION;
D O I：
10.3390/ma10101118
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this work, oxygen vacancies were introduced onto the surface of BiFeO3 nanoparticles by NaBH4 reduction method to yield oxygen-deficient BiFeO3-x samples. Comprehensive analysis on the basis of high-resolution transmission electron microscopy (HRTEM) observation and X-ray photoelectron spectrum (XPS) confirms the existence of surface oxygen vacancies on the BiFeO3-x nanoparticles. The photocatalytic activity of as-prepared BiFeO3-x samples was evaluated by the decolorization of rhodamine B (RhB) under simulated sunlight irradiation. The experimental results indicate that the photocatalytic activity of samples is highly related to the NaBH4 reduction time, and the BiFeO3-x sample reduced for 40 min exhibits the highest photocatalytic efficiency, which is much higher than that of pristine BiFeO3 nanoparticles. This can be explained by the fact that the surface oxygen vacancies act as photoinduced charges acceptors and adsorption sites suppress the recombination of photogenerated charges, leading to an increasing availability of photogenerated electrons and holes for photocatalytic reaction. In addition, the obtained BiFeO3-x sample exhibits good photocatalytic reusability.
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页数：11
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共 26 条
[1]   Binding energies in atomic negative ions: III [J].
Andersen, T ;
Haugen, HK ;
Hotop, H .
JOURNAL OF PHYSICAL AND CHEMICAL REFERENCE DATA, 1999, 28 (06) :1511-1533
[2]   Size Effect on Optical and Photocatalytic Properties in BiFeO3 Nanoparticles [J].
Bai, Xiaofei ;
Wei, Jie ;
Tian, Bobo ;
Liu, Yang ;
Reiss, Thomas ;
Guiblin, Nicolas ;
Gemeiner, Pascale ;
Dkhil, Brahim ;
Infante, Ingrid C. .
JOURNAL OF PHYSICAL CHEMISTRY C, 2016, 120 (07) :3595-3601
[3]   Photocatalytic Activity Enhanced via g-C3N4 Nanoplates to Nanorods [J].
Bai, Xiaojuan ;
Wang, Li ;
Zong, Ruilong ;
Zhu, Yongfa .
JOURNAL OF PHYSICAL CHEMISTRY C, 2013, 117 (19) :9952-9961
[4]   Experimental Evidence for the Carrier Transportation Enhanced Visible Light Driven Photocatalytic Process in Bismuth Ferrite (BiFeO3) One-Dimensional Fiber Nanostructures [J].
Bharathkumar, S. ;
Sakar, M. ;
Balakumar, S. .
JOURNAL OF PHYSICAL CHEMISTRY C, 2016, 120 (33) :18811-18821
[5]   Increasing Solar Absorption for Photocatalysis with Black Hydrogenated Titanium Dioxide Nanocrystals [J].
Chen, Xiaobo ;
Liu, Lei ;
Yu, Peter Y. ;
Mao, Samuel S. .
SCIENCE, 2011, 331 (6018) :746-750
[6]   Photocatalytic Water Splitting for O2 Production under Visible Light Irradiation Using NdVO4-V2O5 Hybrid Powders [J].
Chiang, Tzu Hsuan ;
Chen, Tso-Ming .
MATERIALS, 2017, 10 (04)
[7]   Enhanced photocatalytic activity of La-substituted BiFeO3 nanostructures on the degradation of phenol red [J].
Dhanalakshmi, Radhalayam ;
Muneeswaran, M. ;
Shalini, K. ;
Giridharan, N. V. .
MATERIALS LETTERS, 2016, 165 :205-209
[8]   Enhanced photocatalytic activity of BiFeO3 particles by surface decoration with Ag nanoparticles [J].
Di, L. J. ;
Yang, H. ;
Hu, G. ;
Xian, T. ;
Ma, J. Y. ;
Jiang, J. L. ;
Li, R. S. ;
Wei, Z. Q. .
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 2014, 25 (06) :2463-2469
[9]   Hydrothermal synthesis of novel BiFeO3/BiVO4 heterojunctions with enhanced photocatalytic activities under visible light irradiation [J].
Fan, Ting ;
Chen, Changchun ;
Tang, Zhonghai .
RSC ADVANCES, 2016, 6 (12) :9994-10000
[10]   HETEROGENEOUS PHOTOCATALYSIS [J].
FOX, MA ;
DULAY, MT .
CHEMICAL REVIEWS, 1993, 93 (01) :341-357
123