Inorganic Chemicals Industry >
Effect of sulfate on photocatalytic activity of polymerized carbon nitride
Received date: 2022-01-06
Online published: 2022-09-22
A series of polymerized carbon nitride were prepared by high temperature calcination method after the treatment of melamine with adding SO42-，NO3- and PO43- 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-0.04SO42-） with 0.12 mol SO42- was 99.1% within 45 min，and its pseudo?first?order kinetic constant was 23.0 times greater than that of no SO42-.SO42-，which could effectively enhance the photocatalytic activity of polymerized carbon nitride.The degradation of CN-0.04SO42- 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
Bingxiang MA , Yunxia SHEN , Na LI , Min LI , Yaoyi WEI , Yu ZHAO . Effect of sulfate on photocatalytic activity of polymerized carbon nitride[J]. Inorganic Chemicals Industry, 2022 , 54(9) : 150 -157 . DOI: 10.19964/j.issn.1006-4990.2022-0009
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