聚苯胺/C3N5异质结构建及光催化降解罗丹明B性能研究

doi:10.3969/j.issn.2097-2806.2026.08.005

Abstract

Abstract:

To solve the problem of water pollution caused by a persistent organic pollutant, rhodamine B （RhB） dye, in this work, the semiconductor material nitrogen-rich carbon nitride （C₃N₅） and the conductive polymer polyaniline （PANI） were combined to construct the PANI/C₃N₅ heterojunction. The phase composition, specific surface area and pores of the heterojunction were characterized, as well as its visible light spectral response and photogenerated carrier recombination and lifetime. The degradation of RhB by PANI/C₃N₅ heterojunction under simulated visible light excitation was investigated. The results showed that the type-II heterojunction construction and π-π^* stacking-promoted electron delocalization between PANI and C₃N₅ could improve the separation efficiency and lifetime of photogenerated carriers, expand the visible light absorption range, and enhance the photocatalytic activity. The PANI/C₃N₅ heterojunction showed significantly higher ability in photocatalytic degradation of RhB than both C₃N₅ and PANI. Under the conditions of PANI/C₃N₅ heterojunction dosage of 30 mg, initial pH of 7, and simulated visible light irradiation for 60 min, the degradation percentage of RhB for a RhB solution with initial mass concentration of 100 mg/L could reach 98.42% and the apparent rate constant was 0.063 61 min^-1. After five photocatalytic cycles, the degradation percentage of RhB decreased to 98.22%, indicative of good durability and stability. Superoxide radicals played a key role in the photocatalytic process.

Key words: nitrogen-rich carbon nitride, polyaniline, heterojunction, photocatalytic degradation, rhodamine B

CLC Number:

O643.3

Sheng Chen, Shunying Shang. Construction of polyaniline/C₃N₅ heterojunction and its performance in photocatalytic degradation of rhodamine B[J].China Surfactant Detergent & Cosmetics, 2026, 56(8): 1009-1018.

Figures/Tables 10

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Construction of polyaniline/C₃N₅ heterojunction and its performance in photocatalytic degradation of rhodamine B

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材料	污染物	光源	初始质量浓度/ （mg/L）	光照时间/min	催化剂用量/mg	降解率/ %	表观速率常数/min^-1	来源
SnO₂/Cu/PANI	罗丹明B	250 W紫外灯	10	60	20	98.80	—	[15]
BiOCl/PANI	罗丹明B	300 W Xe， λ>400 nm	50	150	15	98.80	0.031 00	[19]
GeO₂/C₃N₅	罗丹明B	300 W Xe， λ>420 nm	10	150	100	82.00	—	[25]
AgCl/C₃N₅	罗丹明B	300 W Xe， λ>420 nm	10	30	50	96.00	—	[27]
AC/TiO₂/C₃N₅	罗丹明B	500 W Xe， λ>420 nm	25	90	20	95.27	0.024 25	[29]
PANI/C₃N₅	罗丹明B	300 W Xe， λ>420 nm	100	60	30	98.42	0.063 61	本研究

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Construction of polyaniline/C3N5 heterojunction and its performance in photocatalytic degradation of rhodamine B

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Construction of polyaniline/C₃N₅ heterojunction and its performance in photocatalytic degradation of rhodamine B