A simple mechanical mixing method for preparation of visible-light-sensitive NiO-CaO composite photocatalysts with high photocatalytic activity

被引：31
|
作者：
Song, Limin [2 ,3 ]
Zhang, Shujuan [1 ]
机构：
[1] Tianjin Univ Sci & Technol, Coll Sci, Tianjin 300457, Peoples R China
[2] Tianjin Polytech Univ, Coll Environm & Chem Engn, Tianjin 300160, Peoples R China
[3] Tianjin Polytech Univ, Tianjin Key Lab Fiber Modificat & Funct Fiber, Tianjin 300160, Peoples R China
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2010年 / 174卷 / 1-3期
关键词：
NiO-CaO; A mechanical mixing method; Visible-light-sensitive; Photocatalyst; TITANIUM-DIOXIDE PHOTOCATALYSTS; HYDROTHERMAL SYNTHESIS; IRRADIATION; DEGRADATION; NITROGEN; OXIDES; WATER; DECOMPOSITION;
D O I：
10.1016/j.jhazmat.2009.09.088
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Composite photocatalysts composed of NiO and CaO have been prepared via mechanically mixing of the two powders. The as-synthesized NiO-CaO products were characterized by X-ray diffraction (XRD) and UV-vis spectrometry. The experimental results showed that the absorption wavelength range of the mixed NiO-CaO sample was notably extended towards the visible-light region (400-450 nm). Photocatalytic activity of the NiO-CaO composite was evaluated based on the decomposition of methylene blue under visible-light irradiation. The effects of CaO doping and the duration of heat treatment on the durability of the NiO-CaO products have been investigated in detail. Factors influencing photocatalytic activity and the mechanism of photocatalysis were also addressed. Published by Elsevier B.V.
引用
收藏
页码：563 / 566
页数：4
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