BiOI/g-C3N4催化剂的制备及其光催化降解罗丹明B性能

doi:10.19964/j.issn.1006-4990.2023-0022

Abstract

Abstract:

Using melamine as the raw material and graphite phase carbon nitride（g-C₃N₄） prepared by hydrothermal and calcination methods as the carrier，a carbon nitride composite bismuth oxide iodide（BiOI） nanoscale composite catalyst was constructed by precipitation method.The effects of BiOI loading，type and amount of surfactant on the adsorption and photocatalytic degradation of Rhodamine B on the composite catalyst were investigated，and the catalyst was characterized.It was found that when the mass fraction of BiOI was 66% and the non-ionic polymer surfactant polyvinylpyrrolidone（PVP） of 18.75 g/mL was used，the prepared catalyst had appropriate band gap，moderate particle size，and mainly contained BiOI（102） crystal surface.The adsorption and degradation effect of this catalyst was the best，and the degradation rate of RhB could reach 98.4%.More importantly，87.1% of RhB degradation was obtained after 5 reuses of the composite.Furthermore，degradation of 15 mg/L RhB over BiOI/g-C₃N₄ was a first order reaction，of which the rate coefficient was 0.161 8 min^-1.

Key words: BiOI, C₃N₄, Rhodamine B, photocatalysis

CLC Number:

TQ426

SUN Haijie, CHENG Yuan, TIAN Yuan, LIU Hongyan, CHEN Zhihao. Preparation of BiOI/g-C₃N₄ catalyst and its photocatalytic degradation performance of Rhodamine B[J]. Inorganic Chemicals Industry, 2023, 55(8): 36-44.

Figures/Tables 7

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Preparation of BiOI/g-C₃N₄ catalyst and its photocatalytic degradation performance of Rhodamine B

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Preparation of BiOI/g-C3N4 catalyst and its photocatalytic degradation performance of Rhodamine B