升温速率对尿素热解制g-C3N4光催化剂构效影响研究

doi:10.19964/j.issn.1006-4990.2021-0310

Abstract

Abstract:

High value added downstream products graphitic carbon nitride（g-C₃N₄） can be prepared by pyrolysis of urea,but its photocatalytic performance is significantly affected by pyrolysis conditions.Industrial grade urea was used as precursor,the effect of heating rate on the structure and photocatalytic performance of g-C₃N₄ was investigated,and g-C₃N₄ was used for photocatalytic oxidation degradation of organic dyes and photocatalytic reduction to produce H₂O₂.The results showed that g-C₃N₄（GCN-15） with rapid heating rate（15 °C/min） had high crystallinity,less amorphous structure,more complete conjugated structure and narrow band gap,which was beneficial to the transfer of photogenerated electrons and the improvement of photocatalytic performance.The photodegradation rates of RhB and MB by GCN-15 were 4 and 2 times higher than those by GCN-2,respectively,and the yield of H₂O₂ produced in 8 hours was increased by 18.37%.

Key words: g-C₃N₄, pyrolysis of industrial grade urea, structure-activity relationship, heating rate, photocatalysis

CLC Number:

O643.36

YANG Wenbo,WU Pan,HE Jian,LIU Changjun,JIANG Wei. Study on effect of heating rate on structure-activity of g-C₃N₄photocatalyst by pyrolysis of urea[J]. Inorganic Chemicals Industry, 2022, 54(4): 169-174.

Figures/Tables 7

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References 25

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Study on effect of heating rate on structure-activity of g-C₃N₄photocatalyst by pyrolysis of urea

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Study on effect of heating rate on structure-activity of g-C3N4 photocatalyst by pyrolysis of urea