Modification of TiO2 by Zn for catalytic ozonation of p-CBA in aqueous solution
MENG Yi-fan1,2, SUN Shi1,3, QIAO Han1, LI Wei4, YU Geng-zhi1, YANG Yi-xin1, LUO Ming-sheng1
1. National Chemical and Chemical Demonstration Center, Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology, Beijing Institute of Petrochemical Technology, Beijing 102617, China; 2. College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China; 3. China Institute of Atomic Energy, Beijing 102413, China; 4. Shenzhen Urbanspace Planning and Architectural Design Co., Ltd., Shenzhen 518035, China
Abstract: Zn-doped TiO2 is prepared via the impregnation method and used in the catalytic ozonation process for the removal of p-chlorobenzoic acid (p-CBA) from aqueous solution.It is shown that Zn/TiO2 catalyst with a Zn doping ratio of 0.5% has the best activity.The modified catalysts are characterized by SEM, XRD, FT-IR, BET and pHPZC.It is found that specific surface area of Zn/TiO2 decreases sharply with the increase of Zn doping ratio.By contrast, the pHPZC value and the surface hydroxyl groups of catalysts are increased by the modification process, which may be the reason for the enhanced catalytic activity.In addition, Zn/TiO2 catalytic ozonation process runs more efficiently when the solution pH is close to the pHPZC of catalysts.
孟一帆, 孙时, 乔函, 李薇, 禹耕之, 杨忆新, 罗明生. Zn改性TiO2催化臭氧氧化降解溶液中p-CBA的研究[J]. 现代化工, 2021, 41(12): 79-82,87.
MENG Yi-fan, SUN Shi, QIAO Han, LI Wei, YU Geng-zhi, YANG Yi-xin, LUO Ming-sheng. Modification of TiO2 by Zn for catalytic ozonation of p-CBA in aqueous solution. Modern Chemical Industry, 2021, 41(12): 79-82,87.
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