Mechanism of visible light photocatalytic NO(x) oxidation with plasmonic Bi cocatalyst-enhanced (BiO)2CO3 hierarchical microspheres

Physical Chemistry Chemical Physics : PCCP
Yanjuan SunWei Zhang

Abstract

Semimetal bismuth (Bi), as an emerging non-noble metal-based cocatalyst and plasmonic photocatalyst, has attracted significant attention. In this work, a one-pot solvent-controlled synthesis strategy was utilized for the in situ-deposition of plasmonic Bi nanoparticles onto the surfaces of (BiO)2CO3 microspheres (BOC-WE) using bismuth citrate, sodium carbonate, and ethylene glycol as precursors. The introduction of the Bi nanoparticles has a pivotal effect on the morphology, optical and photocatalytic performance of the pristine (BiO)2CO3. The results indicated that the Bi nanoparticles were generated on the surface of (BiO)2CO3 microspheres via the in situ reduction of Bi(3+) by ethylene glycol. The Bi-deposited (BiO)2CO3 microspheres were used for the photocatalytic purification of NOx in air under visible light irradiation. Significantly, the BOC-WE samples exhibited a drastically promoted photocatalytic performance with a NOx removal ratio (η) of 37.2%, superior to pristine (BiO)2CO3 (η = 19.1%), outperforming other well-known visible light photocatalysts, such as C-doped TiO2 (η = 21.8%), BiOBr (η = 21.3%), BiOI (η = 14.9%) and C3N4 (η = 25.5%). The conspicuously enhanced photocatalytic capability can be attributed to the ...Continue Reading

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Citations

Aug 25, 2015·Environmental Science and Pollution Research International·Tanur Sinha, M Ahmaruzzaman
Mar 11, 2016·Chemical Society Reviews·Xin LiMietek Jaroniec
Sep 18, 2016·Journal of Colloid and Interface Science·Yanjuan SunFan Dong
Jun 8, 2018·Chemistry : a European Journal·Yan Cheng, Haiyuan Zhang
Feb 26, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Juying LeiJinlong Zhang
Feb 15, 2019·Chemical Reviews·Xin LiXiaobo Chen

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