王来春, 伍捷, 谢松林, 张子龙, 邹建平. N-GQDs/g-C3N4的合成及光催化分解水产氢性能研究[J]. 南昌航空大学学报(自然科学版), 2017, 31(1): 28-35. DOI: 10.3969/j.issn.1001-4926.2017.01.005
引用本文: 王来春, 伍捷, 谢松林, 张子龙, 邹建平. N-GQDs/g-C3N4的合成及光催化分解水产氢性能研究[J]. 南昌航空大学学报(自然科学版), 2017, 31(1): 28-35. DOI: 10.3969/j.issn.1001-4926.2017.01.005
WANG Lai-chun, WU Jie, XIE Song-lin, ZHANG Zi-long, ZOU Jian-ping. Photocatalytic H2-Evolution Performance of Graphene Quantum Dots/g-C3N4 Hybrid Photocatalyst[J]. Journal of nanchang hangkong university(Natural science edition), 2017, 31(1): 28-35. DOI: 10.3969/j.issn.1001-4926.2017.01.005
Citation: WANG Lai-chun, WU Jie, XIE Song-lin, ZHANG Zi-long, ZOU Jian-ping. Photocatalytic H2-Evolution Performance of Graphene Quantum Dots/g-C3N4 Hybrid Photocatalyst[J]. Journal of nanchang hangkong university(Natural science edition), 2017, 31(1): 28-35. DOI: 10.3969/j.issn.1001-4926.2017.01.005

N-GQDs/g-C3N4的合成及光催化分解水产氢性能研究

Photocatalytic H2-Evolution Performance of Graphene Quantum Dots/g-C3N4 Hybrid Photocatalyst

  • 摘要: 本文系统地研究了由不同前驱体(尿素,双氰胺,三聚氰胺)制备的类石墨烯相氮化碳(g-C3N4)催化剂的催化效果与其结构和形貌的关系,实验结果表明,g-C3N4的聚合方式、聚合程度、质子化程度以及不同前躯体的堆积方式都会对光催化产氢效果产生影响。另外,为了深入探索g-C3N4基复合材料的光催化性能,文中将g-C3N4与氮掺杂石墨烯量子点(N-GQDs)复合,制备了一种新型的非金属催化剂N-GQDs/g-C3N4。相比g-C3N4,N-GQDs/g-C3N4异质结在光催化产氢中表现出了更加优异的效果。最后从机理上解释了N-GQDs/CN-U异质结光催化产氢的原理及N-GQDs在光催化反应中所起的重要作用。

     

    Abstract: In this work, we reported a systematic study of the relationship between photocatalytic properties of hydrogen evolution and structures and morphologies of g-C3N4 prepared by different precursors (urea, melamine and dicyandiamide). The photocatalytic performances of H2 production were affected by the method and degree of polymerization, the degree of protonation, and the morphology of g-C3N4 prepared by different precursors. Furthermore, a novel metal-free N-GQDs/g-C3N4 catalyst was designed and synthesized, which shown much better photocatalytic activity for H2 evolution from water splitting than that of g-C3N4 due to the unique and multiple roles of N-GQDs. A mechanism was put forth to explain the roles of N-GQDs and the detailed enhancement of photocatalytic performance of the N-GQDs/g-C3N4.

     

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