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Modification of TiO2 nanomaterials and their application in photocatalytic degradation of VOCs in indoor air |
ZHANG Tao, CHENG Rong, SHEN Liangjie, CHEN Ran, SHI Lei |
School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China |
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Abstract: The volatile organic compounds (VOCs) are one kind of ubiquitous pollutants in the indoor air, with great potential hazards on human health. The photocatalysis, which is green and highly efficient, is an important technology for the removal of VOCs. However, the conventional TiO2 has some shortcomings, such as the narrow light response range and the low quantum efficiency. So, the modification of TiO2 nanomaterials has been a wide concern. The modification methods for TiO2 nanomaterials include the ion doping, the noble metal deposition, and the semiconductor coupling. This paper reviews the modification methods for TiO2 nanomaterials, and analyzes the mechanism and the influencing factors for improving photocatalytic efficiency. The research progress for VOCs removal in indoor air with modified TiO2 nanomaterials is summarized. As a new application for photocatalytic materials, the photocatalytic degradation of VOCs in indoor air with modified TiO2 nanomaterials needs to be further studied.
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Received: 01 September 2016
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