二氨基马来腈共聚合改性氮化碳光催化剂

引用本文: 郑华荣, 张金水, 王心晨, 付贤智. 二氨基马来腈共聚合改性氮化碳光催化剂[J]. 物理化学学报, 2012, 28(10): 2336-2342. doi: 10.3866/PKU.WHXB201209104 shu

Citation: ZHENG Hua-Rong, ZHANG Jin-Shui, WANG Xin-Chen, FU Xian-Zhi. Modification of Carbon Nitride Photocatalysts by Copolymerization with Diaminomaleonitrile[J]. Acta Physico-Chimica Sinica, 2012, 28(10): 2336-2342. doi: 10.3866/PKU.WHXB201209104 shu

二氨基马来腈共聚合改性氮化碳光催化剂

基金项目:
国家重点基础研究发展计划(2013CB632405) (2013CB632405)

国家自然科学基金(21033003,21173043)资助项目 (21033003,21173043)

摘要:

利用二氨基马来腈(DMNA)与二聚氰胺(DCDA)的高温共聚合反应, 制备了石墨相氮化碳 (g-C₃N₄), 并通过X射线衍射(XRD)、傅里叶变换红外(FT-IR)光谱、透射电镜 (TEM)、氮气吸脱附实验 (N₂-sorption)、电子顺磁共振 (EPR)、紫外-可见漫反射光谱 (UV-Vis DRS) 和荧光 (PL) 光谱等表征手段,系统考察了共聚合改性对g-C₃N₄晶体结构、化学结构、能带结构、织构、光吸收性能和光催化性能等的影响.研究结果表明:共聚合改性后氮化碳材料仍保持石墨相晶体结构, 但其π电子的离域性增强, 并在催化剂表面产生异质结构, 进而提高了氮化碳在可见光区域的光吸收性能, 并促进了光生载流子的有效分离. 性能评价结果显示, DMNA改性的氮化碳在可见光下光催化产氢活性明显高于未改性的样品, 当DMNA用量为0.01g时, 催化剂的产氢速率最高, 达到45.0 μmol·h^-1, 为纯氮化碳样品的4.5倍.

关键词:

English

Modification of Carbon Nitride Photocatalysts by Copolymerization with Diaminomaleonitrile

1.
Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, P. R. China
Received Date: 09 August 2012
Available Online: 26 September 2012
Fund Project:
国家重点基础研究发展计划(2013CB632405)

国家自然科学基金(21033003,21173043)资助项目

Abstract:

g-C₃N₄photocatalysts were synthesized by copolymerization of diaminomaleonitrile (DMNA) with dicyanodiamide (DCDA) at high temperatures. The effect of copolymerization on the crystal structure, chemical structure, band structure, texture, optical property and photocatalytic performance of g-C₃N₄ was studied by such characterization techniques as X-ray diffraction patterns (XRD), Fourier transformed infrared (FT-IR), transmission electron microscopy (TEM), nitrogen-sorption (N₂-sorption),electron paramagnetic resonance (EPR), UV-Vis diffuse reflectance spectra (UV-Vis DSR) and photoluminescence (PL) analyses. Results demonstrated that the graphitic-like layer packing structure of g-C₃N₄ remained unchanged after the modification; however the copolymerization with DMNA can efficiently extend the delocalizationof π-electrons and induce the formation of surface junctions, greatly enhancing the light-harvesting abilityof g-C₃N₄ in visible light region and promoting the separation of photogenerated charge carriers, respectively. Photocatalytic performance showed that all DMNA-modified samples presented an enhanced H₂ evolution activity under visible light irradiation. The optimized weight-in amount of DMNA is found to be 0.01g, by which the modified sample shows the highest hydrogen evolution rate of 45.0 μmol·h^-1. This value is 4.5 times as high as that of the unmodified carbon nitride sample.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

二氨基马来腈共聚合改性氮化碳光催化剂

English

Modification of Carbon Nitride Photocatalysts by Copolymerization with Diaminomaleonitrile

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

二氨基马来腈共聚合改性氮化碳光催化剂

English

Modification of Carbon Nitride Photocatalysts by Copolymerization with Diaminomaleonitrile

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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