Energy-resolved distribution of electron traps for O/S-doped carbon nitrides by reversed double-beam photoacoustic spectroscopy and the photocatalytic reduction of Cr(VI)

Chitiphon Chuaicham; Sekar Karthikeyan; Radheshyam R. Pawar; Yihuang Xiong; Ismaila Dabo; Bunsho Ohtani; Yoonyoung Kim; Jun Tae Song; Tatsumi Ishihara; Keiko Sasaki

doi:10.1039/C9CC09988C

Energy-resolved distribution of electron traps for O/S-doped carbon nitrides by reversed double-beam photoacoustic spectroscopy and the photocatalytic reduction of Cr(vi)†

Chitiphon Chuaicham,

^a Sekar Karthikeyan,

^a Radheshyam R. Pawar,

^a Yihuang Xiong,^b Ismaila Dabo,^b Bunsho Ohtani,^c Yoonyoung Kim,

^de Jun Tae Song,^de Tatsumi Ishihara

^de and Keiko Sasaki

*^ac

Author affiliations

* Corresponding authors

^a Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Nishiku, Fukuoka 819-0395, Japan
E-mail: keikos@mine.kyushu-u.ac.jp

^b Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA

^c Institute for Catalysis, Hokkaido University, Sapporo 001-0021, Japan

^d Department of Applied Chemistry, Faculty of Engineering, Kyushu University, 744 Motooka, Nishiku, Fukuoka 819-0395, Japan

^e International Institute for Carbon-Neutral Energy Research (I2CNER), 744 Motooka, Nishiku, Fukuoka 819-0395, Japan

Abstract

We report for the first time to our knowledge the identification of heteroatom-doped and undoped C₃N₄ with the energy-resolved distribution of electron traps (ERDT) near the conduction band bottom position (CBB) using reversed double-beam photoacoustic spectroscopy. The ERDT/CBB pattern is used to classify the type of elemental doping in C₃N₄, related to photocatalytic efficiency.

Chemical Communications

Energy-resolved distribution of electron traps for O/S-doped carbon nitrides by reversed double-beam photoacoustic spectroscopy and the photocatalytic reduction of Cr(vi)†

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Energy-resolved distribution of electron traps for O/S-doped carbon nitrides by reversed double-beam photoacoustic spectroscopy and the photocatalytic reduction of Cr(VI)

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