硫酸根对聚合氮化碳光催化活性的影响

doi:10.19964/j.issn.1006-4990.2022-0009

Abstract

Abstract:

A series of polymerized carbon nitride were prepared by high temperature calcination method after the treatment of melamine with adding SO₄^2-，NO₃^- and PO₄^3- under the condition of pH=1，respectively.The samples were characterized by X-ray diffraction（XRD），scanning electron microscopy（SEM），UV-Visible diffuse reflectance spectroscopy（UV-Vis DRS），etc.Using rhodamine B（RhB） as pollutant，the photocatalytic degradation activity，stability and degradation mechanism of polymerized carbon nitride were explored under visible light.The degradation of RhB by polymerized carbon nitride（CN-0.04SO₄^2-） with 0.12 mol SO₄^2- was 99.1% within 45 min，and its pseudo?first?order kinetic constant was 23.0 times greater than that of no SO₄^2-.SO₄^2-，which could effectively enhance the photocatalytic activity of polymerized carbon nitride.The degradation of CN-0.04SO₄^2- was decreased slightly after three cycles，indicating that it had good stability.Active species capture experiment showed that ·O₂^- and ·OH were the main active species affecting photocatalytic degradation of RhB.

Key words: carbon nitride, photocatalytic, degradation

CLC Number:

MA Bingxiang,SHEN Yunxia,LI Na,LI Min,WEI Yaoyi,ZHAO Yu. Effect of sulfate on photocatalytic activity of polymerized carbon nitride[J]. Inorganic Chemicals Industry, 2022, 54(9): 150-157.

Figures/Tables 9

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References 24

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National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Effect of sulfate on photocatalytic activity of polymerized carbon nitride

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