Preparation of g-C<sub>3</sub>N<sub>4</sub> by self-assembled supramolecular precursor and its study of hydrogen production from photocatalytic water splitting

LI Ye; HE Jiajia; ZHU Chuanwei; ZHANG Haijing; SU Tongming

doi:10.12434/j.issn.2097-2547.20240145

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Preparation of g-C₃N₄ by self-assembled supramolecular precursor and its study of hydrogen production from photocatalytic water splitting

- Preparation of g-C₃N₄ by self-assembled supramolecular precursor and its study of hydrogen production from photocatalytic water splitting
- Vol. 49, Issue 9, Pages: 51-61(2024)
- 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.2097-2547.20240145
  CLC： TQ034
- Published：25 September 2024，
  
  Received：08 April 2024，
  
  Revised：28 April 2024，
- 稿件说明：
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李野,和家佳,朱传伟等.自组装超分子前驱体制备g-C₃N₄及其光催化分解水产氢的研究[J].低碳化学与化工,2024,49(09):51-61.

LI Ye,HE Jiajia,ZHU Chuanwei,et al.Preparation of g-C₃N₄ by self-assembled supramolecular precursor and its study of hydrogen production from photocatalytic water splitting[J].Low-carbon Chemistry and Chemical Engineering,2024,49(09):51-61.
李野,和家佳,朱传伟等.自组装超分子前驱体制备g-C₃N₄及其光催化分解水产氢的研究[J].低碳化学与化工,2024,49(09):51-61. DOI： 10.12434/j.issn.2097-2547.20240145.

LI Ye,HE Jiajia,ZHU Chuanwei,et al.Preparation of g-C₃N₄ by self-assembled supramolecular precursor and its study of hydrogen production from photocatalytic water splitting[J].Low-carbon Chemistry and Chemical Engineering,2024,49(09):51-61. DOI： 10.12434/j.issn.2097-2547.20240145.

摘要

光催化剂的结构调控对提高光催化效率有重要意义。以三聚氰胺为原料制备了g-C

，并以三聚氰胺-三聚氰酸超分子为前驱体，制备了一系列MC

-g-C

（

为三聚氰胺与三聚氰酸的物质的量比，

=1、2、3或4）。采用XRD、FT-IR、SEM、TEM、N

吸/脱附和XPS等对g-C

和MC

-g-C

进行了表征，发现g-C

和MC

-g-C

具有不同的形貌、结构、组成和比表面积。其中，MC3-g-C

为多孔的纳米片结构，

(C元素):

(N元素)为1.23，比表面积为45.63 m

/g，是g-C

比表面积的4.5倍。以Pt为助催化剂，三乙醇胺为牺牲剂，在可见光下（≥ 400 nm）考察了催化剂的光催化分解水产氢性能。结果表明，MC3-g-C

表现出最佳的光催化分解水产氢性能，其产氢速率达到1127.83 μmol/(h·g)，是g-C

的35倍。MC3-g-C

较大的比表面积和多孔结构为反应提供了更多的活性位点，且纳米片结构缩短了光生电子迁移到催化剂表面的距离，促进了光生电子和空穴的分离，从而显著提高了其光催化分解水

产氢性能。

Abstract

The structural regulation of photocatalysts is important to improve the efficiency of photocatalysis. g-C

was prepared from melamine as raw material

and a series of MC

-g-C

(

is the molar ratio of melamine to cyanuric acid

and

= 1

3 or 4) catalysts were prepared using melamine-cyanuric acid supramolecular as precursor. XRD

FT-IR

SEM

TEM

adsorption/desorption

and XPS were used to characterize g-C

and MC

-g-C

and it is found that g-C

and MC

-g-C

exhibit different morphologies

structures

compositions and specific surface areas. Among them

MC3-g-C

displays porous nanosheet structure with

(C element):

(N element) of 1.23

and the specific surface area is 45.63 m

which is 4.5 times larger than that of g-C

. Using Pt as the co-catalyst and triethanolamine as the sacrificial agent

the catalytic performance of catalysts for hydrogen production from photocatalytic water splitting was investigated under visible light (≥ 400 nm). The results show that MC3-g-C

shows the best catalytic performance for hydrogen production from photocatalytic water splitting

and its hydrogen production rate reaches 1127.83 μmol/(h·g)

which is 35 times higher than that of g-C

. The large surface area and porous structure of MC3-g-C

provide more active sites for the reaction

and the nanosheet structure shorens the migration distance of photogenerated electrons to the catalyst surface

which promotes the separation of photogenerated electrons and holes

and thus significantly improving its catalytic performance for hydrogen production

from photocatalytic water splitting.

关键词

光催化可见光产氢超分子前驱体氮化碳

Keywords

photocatalysisvisible lighthydrogen productionsupramolecular precursorcarbon nitride

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Preparation of g-C3N4 by self-assembled supramolecular precursor and its study of hydrogen production from photocatalytic water splitting

DOI：10.12434/j.issn.2097-2547.20240145

摘要

Abstract

关键词

Keywords

references

Preparation of g-C₃N₄ by self-assembled supramolecular precursor and its study of hydrogen production from photocatalytic water splitting