Coal-based carbon quantum dots/carbon nitride composites for photocatalytic CO2 reduction

被引：0

作者：

Zhang R. ^{[1
]}

Li K. ^{[1
]}

Zhang K. ^{[1
]}

Liu W. ^{[1
]}

Zheng L. ^{[1
]}

Zhang Y. ^{[1
,2
]}

机构：

[1] College of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, Xi'an, 710054, Shaanxi

[2] Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Natural Resources, Xi'an, 710021, Shaanxi

来源：

Zhang, Yating (isyating@163.com) | 1600年 / Materials China卷 / 71期

关键词：

Carbon dioxide; Catalyst; Coal; G-C[!sub]3[!/sub]N[!sub]4[!/sub; Methanol; Photochemistry;

D O I：

10.11949/0438-1157.20200096

中图分类号：

学科分类号：

摘要：

Using Taixi anthracite as a raw material, coal-based carbon quantum dots (C-CQDs) were prepared by chemical oxidation, and C-CQDs and urea were used as precursors to prepare coal-based carbon quantum dots/carbon nitride (C-CQDs /g-C3N4) composite materials. The composition and structure of the samples were characterized by means of TEM, XRD, FT-IR, UV-Vis and PL respectively, and the phoyocatalytic potential were assessed in terms of reduction CO2 into methanol under visible light irradiation. The results show that the C-CQDs were uniformly decorated on the surfaces of the C-CQDs/g-C3N4 composite, and the C-CQDs/g-C3N4 exhibited superior photoactivity, the methanol yield up to 28.69 μmol/(g cat), which is about 2.2 times in comparison with that of pure graphite carbon nitride (g-C3N4) in photocatalytic CO2 reduction. © All Right Reserved.

引用

页码：2788 / 2794

页数：6

共 30 条

[1] Cao S, Yu J., g-C3N4-based photocatalysts for hydrogen generation, The Journal of Physical Chemistry Letters, 5, 12, pp. 2101-2107, (2014)
[2] Liang Z Q, Sun B T, Xu X S, Et al., Metallic 1T-phase MoS2 quantum dots/g-C3N4 heterojunctions for enhanced photocatalytic hydrogen evolution, Nanoscale, 11, pp. 12266-12274, (2019)
[3] Tong Z, Yang D, Shi J, Et al., Three-dimensional porous aerogel constructed by g-C3N4 and graphene oxide nanosheets with excellent visible-light photocatalytic performance, ACS Applied Materials & Interfaces, 7, 46, pp. 25693-25701, (2015)
[4] Ong W J, Tan L L, Ng Y H, Et al., Graphitic carbon nitride (g-C3N4)-based photocatalysts for artificial photosynthesis and environmental remediation: are we a step closer to achieving sustainability?, Chem. Rev, 116, 12, pp. 7159-7329, (2016)
[5] Wang J C, Yao H C, Fan Z Y, Et al., Indirect Z-scheme BiOI/g-C3N4 photocatalysts with enhanced photoreduction CO2 activity under visible light irradiation, ACS Applied Materials & Interfaces, 8, 6, pp. 3765-3775, (2016)
[6] Xue J, Ma S, Zhou Y, Et al., Facile photochemical synthesis of Au/Pt/g-C3N4 with plasmon-enhanced photocatalytic activity for antibiotic degradation, ACS Applied Materials & Interfaces, 7, 18, pp. 9630-9637, (2015)
[7] Liu L, Zhang W, Wang Y X., Graphitic carbon nitride materials: controllable preparations and applications in energy catalysis, CIESC Journal, 69, 11, pp. 4577-4591, (2018)
[8] Fontelles-Carceller O, Munoz-Batista M J, Fernandez-Garcia M, Et al., Interface effects in sunlight-driven Ag/g-C3N4 composite catalysts: study of the toluene photodegradation quantum efficiency, ACS Applied Materials & Interfaces, 8, 4, pp. 2617-2627, (2016)
[9] Yang X, Chen Z, Xu J, Et al., Tuning the morphology of g-C3N4 for improvement of Z-scheme photocatalytic water oxidation, ACS Applied Materials & Interfaces, 7, 28, pp. 15285-15293, (2015)
[10] Zhu Y P, Ren T Z, Yuan Z Y., Mesoporous phosphorus-doped g-C3N4 nanostructured flowers with superior photocatalytic hydrogen evolution performance, ACS Applied Materials & Interfaces, 7, 30, pp. 16850-16856, (2015)

← 1 2 3 →