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

By Qianqian Huang, Yun Hu, Yunxin Pei, Jinhui Zhang, Mingli Fu. 2019

254 citations recorded by the source corpus.

Abstract 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 (Ti-N-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.

Subfields: Electrical and Electronic Engineering, Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/7e865484913647748b053c986549326c3e833b24