材料科学技术(英文版)2021，Vol.71Issue(12) ：211-220.

One step method of structure engineering porous graphitic carbon nitride for efficient visible-light photocatalytic reduction of Cr(Ⅵ)

Xueru Chen Yin Zhang Dashui Yuan Wu Huang Jing Ding Hui Wan Wei-Lin Dai Guofeng Guan
材料科学技术(英文版)2021，Vol.71Issue(12) ：211-220.
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One step method of structure engineering porous graphitic carbon nitride for efficient visible-light photocatalytic reduction of Cr(Ⅵ)

Xueru Chen 1Yin Zhang 1Dashui Yuan 1Wu Huang 1Jing Ding 1Hui Wan 1Wei-Lin Dai 2Guofeng Guan1
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作者信息

  • 1. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 210009, China
  • 2. Department of Chemistry & Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China
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Abstract

Porous g-C3N4 nanosheets (PCN) were prepared by the nickel-assisted one-step thermal polymerization method.Hydrogen (H2) which was produced by the reaction between nickel (Ni) foam and ammonia (NH3) defined the structure and properties of PCN.During the formation of PCN,the participation of H2 not only enhanced the spacing between layers but also boosted the specific surface area that more active sites were exposed.Additionally,H2 promoted pores formation in the nanosheets,which was beneficial to the transfer of photons through lamellar structure and improved the absorption efficiency of visible light.Remarkably,the obtained PCN possessed better Cr(Ⅵ) photocatalytic reduction efficiency than pure g-C3N4.The reaction rate constant (k) of PCN (0.013 min-1) was approximately twice that of bare g-C3N4 (0.007 min-1).Furthermore,the effects of original pH and concentration of Cr(Ⅵ)-containing solution on removal efficiency of Cr(Ⅵ) were explored.A possible photocatalytic mechanism was proposed based on the experiments of radical scavengers and photoelectrochemical characterizations.

Key words

Porous carbon nitride/Nickel foam/Hydrogen/Cr(Ⅵ)/Photocatalysis

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基金项目

We would like to thank financial support by the National Natural Science Foundation of China(21878159)

We would like to thank financial support by the National Natural Science Foundation of China(21706131)

We would like to thank financial support by the National Natural Science Foundation of China(U19B2001)

Natural Science Foundation of Jiangsu Province of China(BK20181378)

Natural Science Fund for Colleges and Universities in Jiangsu Province(17KJB530004)

China Postdoctoral Science Foundation(2018M640479)

State Key Laboratory of Materials-Oriented Chemical Engineering(ZK 201712)

Shanghai Science,Technology Committee(19DZ2270100)

Science and Technology Program of Nantong,China(JC2018013)

出版年

2021
材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI
影响因子：0.657
ISSN：1005-0302
参考文献量86
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