Preparation of B modified g-C3N4 and their photocatalytic CO2 reduction

HE Xingli; SUN Manying; SU Tongming

doi:10.12434/j.issn.2097-2547.20240415

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Preparation of B modified g-C₃N₄ and their photocatalytic CO₂ reduction

更新时间：2025-05-29

- Preparation of B modified g-C₃N₄ and their photocatalytic CO₂ reduction
- Vol. 50, Issue 5, Pages: 18-31(2025)
- 作者机构：
  
  广西大学化学化工学院广西电化学能源材料重点实验室，广西南宁 530004
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20240415
  CLC： TQ034;O643.36
- Received：09 October 2024，
  
  Revised：01 November 2024，
  
  Published：25 May 2025
- 稿件说明：
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何醒丽,孙满营,苏通明.B修饰g-C₃N₄的制备及其光催化CO₂还原[J].低碳化学与化工,2025,50(05):18-31.

HE Xingli,SUN Manying,SU Tongming.Preparation of B modified g-C₃N₄ and their photocatalytic CO₂ reduction[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(05):18-31.
何醒丽,孙满营,苏通明.B修饰g-C₃N₄的制备及其光催化CO₂还原[J].低碳化学与化工,2025,50(05):18-31. DOI： 10.12434/j.issn.2097-2547.20240415.

HE Xingli,SUN Manying,SU Tongming.Preparation of B modified g-C₃N₄ and their photocatalytic CO₂ reduction[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(05):18-31. DOI： 10.12434/j.issn.2097-2547.20240415.

摘要

石墨氮化碳（g-C

）是光催化CO

还原的理想催化剂之一，然而光生载流子的快速复合限制了g-C

的应用。采用水热法处理由三聚氰胺和B

组成的混合物，然后焙烧水热反应产物，制备了一系列B修饰g-C

（

-B-HCN，

为B

与三聚氰胺的物质的量之比）。采用XRD和FT-IR等对

-B-HCN的晶体结构和官能团等进行了表征，并研究了

-B-HCN的光催化CO

还原制CO性能和相应反应机理。结果表明，

-B-HCN具有较大的比表面积（11.8~24.6 m

/g），因此表现出较强的CO

吸附性能。在使用了400 nm截止滤光片的300 W氙灯照射下反应5 h，0.20-B-HCN表现出最优的催化性能，其CO生成速率为6.88 μmol/(g·h)，分别是一步焙烧法制得的g-C

（1.24 μmol/(g·h)）和未经B修饰的HCN-1（1.73 μmol/(g·h)）的5.54倍和3.97倍。在相同条件下第3次循环中光照5 h时，0.20-B-HCN的CO生成速率为6.53 μmol/(g·h)，表明0.20-B-HCN具有良好的稳定性。

-B-HCN光催化CO

还原为CO的路径为：CO

→ COOH* → CO* → CO。

Abstract

Graphitic carbon nitride (g-C

) is one of the ideal catalysts for photocatalytic CO

reduction. However

the application of g-C

is limited due to the rapid recombination of photogenerated carriers. The mixture of melamine and B

was treated by hydrothermal method

and then a series of B-modified g-C

(

-B-HCN

is the molar ratio of B

and melamine) was prepared by cal

cining the hydrothermal reaction product. The crystal structures and functional groups of

-B-HCN were characterized by XRD and FT-IR

etc. And the photocatalytic performance and corresponding reaction mechanism of

-B-HCN for CO

reduction to CO were studied. The results show that

-B-HCN has large specific surface area (11.8 m

/g to 24.6 m

/g)

thus exhibiting strong CO

adsorption performances. Under irradiation by 300 W xenon lamp with 400 nm cut-off filter for 5 h

0.20-B-HCN exhibits the best photocatalytic performance with CO generation rate of 6.88 μmol/(g·h)

which is 5.54 times greater than that of g-C

(1.24 μmol/(g·h)) obtained by one-step calcination method and 3.97 times greater than that of HCN-1 (1.73 μmol/(g·h)) without B modification. Irradiation for 5 h in the third cycle under the same conditions

the CO generation rate of 0.20-B-HCN is 6.53 μmol/(g·h)

which indicates that 0.20-B-HCN has fairly high stability. The pathway of photocatalytic CO

reduction to CO by

-B-HCN is as follows: CO

→ COOH* → CO* → CO.

关键词

Keywords

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HE Xingli

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Related Institution

School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Electrochemical Energy Materials, Guangxi University

School of Chemical Engineering, Sichuan University

SINOPEC Shanghai Research Institute of Petrochemical Technology Co., Ltd.

Institute of New Energy and Low-Carbon Technology, Sichuan University

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