In situ synthesis of TiO2@NH2-MIL-125 composites for use in combined adsorption and photocatalytic degradation of formaldehyde

被引：228
作者：
Huang, Qianqian [1 ]
Hu, Yun [1 ,2 ,3 ]
Pei, Yun [1 ]
Zhang, Jinhui [1 ]
Fu, Mingli [1 ,2 ,3 ]
机构：
[1] South China Univ Technol, Sch Environm & Energy, Guangzhou 510006, Guangdong, Peoples R China
[2] Guangdong Prov Key Lab Atmospher Environm & Pollu, Guangzhou 510006, Guangdong, Peoples R China
[3] Minist Educ, Key Lab Pollut Control & Ecosyst Restorat Ind Clu, Guangzhou 510006, Guangdong, Peoples R China
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2019年 / 259卷
基金：
中国国家自然科学基金;
关键词：
TiO2@NH2-MIL-125 composite; Synergistic effect; Formaldehyde; Photocatalysis; METAL-ORGANIC FRAMEWORK; DOPED TIO2; OXIDATION; REMOVAL; UV; PERFORMANCE; AIR; CO2; HETEROSTRUCTURE; NH2-MIL-125(TI);
D O I：
10.1016/j.apcatb.2019.118106
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：
TiO2@NH2-MIL-125, composite photocatalysts with close interfacial contact between NH2-MIL-125 and TiO2, were successfully synthesized via an in-situ solvothermal method for formaldehyde (HCHO) removal under UV irradiation. Samples were characterized by using a variety of analytical techniques. The results showed that TiO2 particles were highly dispersed on the surface of NH2-MIL-125, and there was a strong electronic interaction (TiN-C) between elements of the composite. TiO2@NH2-MIL-125 exhibited significantly enhanced photocatalytic performance for HCHO removal compared to pure TiO2 and NH2-MIL-125 that was ascribed to the synergistic combination of high adsorption capacity of NH2-MIL-125, high dispersion of TiO2 and efficient interfacial charge transfer between TiO2 and NH2-MIL-125. Furthermore, the HCHO removal rate over the composite remained at 90% after 122 h of continuous photocatalytic reaction, indicating the high stability of the catalyst. This work provides new insights that will be helpful in the further development of photocatalysts for indoor air purification.
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页数：14
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