Enhanced organic pollutant photodegradation via adsorption/photocatalysis synergy using a 3D g-C3N4/TiO2 free-separation photocatalyst

By Yuqiang Sheng, Zhen Wei, H. Miao, W. Yao, Huiquan Li, Yongfa Zhu. Chemical Engineering Journal, 2019

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Abstract The three dimensions (3D) g-C3N4/TiO2 heterojunction photocatalyst has been synthesized and exhibits efficient pollutant degradation performances. The degradation efficiency of methylene blue (MB) and phenol is 4.0 and 4.5 times as high as bulk g-C3N4 in static system. In dynamic system, the pollutant can be continuously degraded without separation, and it is very stable for 90 h with a removal rate of 16.0%. The enhanced activity is mainly attributed to the 3D structure and heterojunction of g-C3N4/TiO2. The 3D structure can not only effectively improve the adsorption-enrichment capability, but also supply multidimensional mass and electron transfer channels. Meanwhile, the heterojunction can promote the separation and migration of the photo-generated carriers. Therefore, the 3D g-C3N4/TiO2 heterojunction photocatalyst with separation free can facilitate the potential application in the treatment of water pollution.

Subfields: Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/a6f9bf173ffe02d816beceb2b79a61b6713c569f