Photocatalytic property of a Bi2O3 nanoparticle modified BiOCl composite with a nanolayered hierarchical structure synthesized by in situ reactions. Issue 12 (17th February 2015)

• Record Type: Journal Article
• Authors: Hu, Jiajia; Xu, Guangqing; Wang, Jinwen; Lv, Jun; Zhang, Xinyi; Xie, Ting; Zheng, Zhixiang; Wu, Yucheng
• Is Part Of: Dalton transactions. Volume 44:Issue 12(2015)
• Page Start: 5386
• Page End: 5395
• Publication Date: 2015-02-17
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c4dt03953j
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Bi2 O3 nanoparticle modified BiOCl nanosheets with a nanolayered hierarchical structure synthesized by in situ reactions exhibit high photocatalytic performance. Abstract : A Bi2 O3 nanoparticle modified BiOCl composite was synthesized by a solvothermal method combined with in situ reduction and oxidation in KBH4 and H2 O2 solutions respectively. The thickness of a BiOCl nanosheet and the amount of Bi2 O3 nanoparticle can be adjusted by changing the KBH4 concentration. The structure, morphology, elemental composition and optical absorption performance were characterized by using an X-ray diffraction diffractometer, a scanning electron microscope, a high resolution transmission electron microscope, an X-ray photoelectron spectroscope and a UV-Vis diffuse reflection spectroscope respectively. A nanolayered hierarchical structure of BiOCl was observed, and Bi2 O3 nanoparticles were found to be evenly distributed on the surface/interface of the nanosheets. The photocatalytic activity of the composite was tested by the degradation of 40 mg L −1 methyl orange solution under UV light illumination. The Bi2 O3 /BiOCl composite prepared in a KBH4 concentration of 0.02 M achieved the highest photocatalytic rate of 95.7% in 8 min under UV light illumination with a kinetic constant of 0.3125 l min −1 . The photocatalytic mechanism of the composite has been discussed.