硫化镉/石墨烯复合光催化剂的微波水热合成及DFT研究

doi:10.11896/cldb.18020076

Abstract
Figure/Table
References
Related Citation (7)

Download:

Full Text ( PDF ) (15182KB)
Export: BibTeX | EndNote (RIS)

Abstract The CdS/rGO nanocomposites were prepared via microwave-hydrothermal process. The structure and morphology of CdS/rGO composites was characterized by XRD, FTIR, XPS, SEM, and TEM. The mechanism of charge transfer for CdS/rGO heterogeneous interface was investigated by UV-Vis spectra combined density functional theory (DFT) calculations. The results indicated that the CdS in CdS/rGO displayed good dispersion, high photocatalytic activity, and excellent light stability. When the content of rGO was 0.5 mg/mL, the composite exhibited the best photocatalytic activity. The photodegradation rate of methylene blue (MB) reached 94.40 % after 120 min in visible light and the composite had the similar photocatalytic performance during five cycles. The DFT calculations such as interfacial interaction, charge density difference, ave-rage electrostatic potential et al revealed that the hetero-interface between CdS and rGO formed via van der Waals' interaction, which resulted in stabilization of composites. The introduction of rGO promoted the efficient transport of photo-induced electrons from CdS to the rGO, and gave rise to spatial separation of photo-generated electrons and holes. Hence, the enhancement of photocatalytic performance was observed.

Key words： cadmium sulfide/graphene microwave-hydrothermal method DFT photocatalyst content of graphene

Published: 16 May 2019

CLC number:	TB321
	O469

Fund:This work was financially supported by the National Natural Science Foundation of China (51562018,51004059), the Academic Discipline Direction Team of Kunming University of Science and Technology (14078318).

About author:: Mingyuan Yu received his M.S. degrees in applied chemical physics from Kunming University of Science and Technology in June 2018. His current research interests focus on the synthesis of semiconductor photoca-talysts to utilize solar energy for environmental remediation, and first-principles modeling of functional mate-rials.
Wenwen Qu received her PhD. Degree in physical Chemistry from Beijing Normal University in 2006. She is currently a professor of Chemistry in Faculty of Science, Kunming University of Science and Technology, China. Her research interests include microwave-assisted synthesizing semiconductor photocatalytic materials, computational modeling surface/interface structures and properties based on the first principles, and recovery and regeneration of spent catalysts.

	Service
	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	YU Mingyuan
	WANG Lu
	QU Wenwen
	ZHANG Libo
	ZHANG Jialin
	CHEN Zhen

Cite this article:

YU Mingyuan,WANG Lu,QU Wenwen, et al. Microwave-Hydrothermal Synthesis of CdS/rGO Composite Photocatalyst: an Investigation of Experiment and Theory[J]. Materials Reports, 2019, 33(10): 1602-1608.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.18020076 OR http://www.mater-rep.com/EN/Y2019/V33/I10/1602

1 Chen J, Wu X J, Yin L, et al.Angewandte Chemie, 2015, 54(4), 1210.
2 And D J, Guo L.Journal of Physical Chemistry B, 2006, 110(23),11139.
3 Cao W, Zhang X, Zheng Y, et al.International Journal of Hydrogen Energy, 2017, 42(5),2924.
4 Kansal S K, Singh M, Sud D.Journal of Hazardous Materials, 2007, 141(3),581.
5 Li Q, Guo B, Yu J, et al.Journal of the American Chemical Society, 2011, 133(28),10878.
6 Sun W T, Yu Y, Pan H Y, et al.Journal of the American Chemical Society, 2008, 130(4),1124.
7 Wang M, Cai L, Wang Y, et al. Journal of the American Chemical Society, 2017,139 (11), 4144.
8 Gao P, Liu J, Sun D D, et al.Journal of Hazardous Materials, 2013, s 250,412.
9 Min Y, He G, Xu Q, et al.Journal of Materials Chemistry A, 2014, 2(8),2578.
10 Cao S, Low J, Yu J, et al.Advanced Materials, 2015, 27(13),2150.
11 Zhang C, Chen G, Li C, et al.ACS Sustainable Chemistry & Engineering, 2016, 4(11),5936.
12 Geim A K.Science, 2009, 324(5934),1530.
13 Peng T, Li K, Zeng P, et al.Journal of Physical Chemistry C, 2015, 116(43),22720.
14 Xiao F X, Miao J, Liu B.Journal of the American Chemical Society, 2014, 136(4),1559.
15 Lin Y C, Tsai D C, Chang Z C, et al. Applied Surface Science,2018, 440, 1227.
16 Zhang N, Zhang Y, Pan X, et al. Journal of Physical Chemistry C, 2012, 116(6),18023.
17 Kaveri S, Thirugnanam L, Dutta M, et al.Ceramics International, 2013, 39(8),9207.
18 Liu J, Pu X, Zhang D, et al.Materials Research Bulletin, 2014, 57(23),29.
19 Ye A, Fan W, Zhang Q, et al.Catalysis Science & Technology, 2012, 2(5), 969.
20 Lee J S, You K H, Park C B, et al.Advanced Materials, 2012, 24(8), 1084.
21 Lv X, Fu W, Chang H, et al.Journal of Materials Chemistry, 2012, 22(4),1539.
22 Zhou K, Zhang J F, et al. Journal of Functional Materials, 2018, 49(5), 5016 (in Chinese).
周凯, 张建锋, 等.功能材料, 2018, 49(5), 5016.
23 Dong C, Li X, Jin P, et al.Journal of Physical Chemistry C, 2012, 116(29),15833.
24 Liu X, Pan L, Lv T, et al.Chemical Communications, 2011, 47(43),11984.
25 Yin R, Li J, Liu R, et al.Materials Review, 2011, 25(s1), 64(in Chinese).
殷蓉, 李景印, 刘瑞红,等.材料导报, 2011, 25(s1), 64.
26 Delley B.Journal of Chemical Physics, 2000, 113(18),7756.
27 Clark S J, Segall M D, Pickard C J, et al.Zeitschrift für Kristallographie, 2005, 220,567.
28 Perdew J P, Burke K, Ernzerhof M.Physical Review Letters, 1996, 77(18),3865.
29 Vanderbilt D.Physical Review B Condensed Matter, 1990, 41(11),7892.
30 Grimme S.Journal of Computational Chemistry, 2006, 27(15),1787.
31 Grimme S.Journal of Computational Chemistry, 2004, 25(12),1463.
32 Zhang H, Lv X, Li Y, et al.ACS Nano, 2010, 4(1),380.
33 Yang M Q, Weng B, Xu Y J.Langmuir the ACS Journal of Surfaces & Colloids, 2013, 29(33),10549.
34 Zhang C, Xu Y J.ACS Applied Materials & Interfaces, 2013, 5(24),13353
35 Yang G, Yan W, Zhang Q, et al.Nanoscale, 2013, 5(24),12432.
36 Ma D, Li X, Guo Y, et al.Acta Photonica Sinica, 2017, 46(12), 128(in Chinese).
马德跃, 李晓霞, 郭宇翔,等.光子学报, 2017, 46(12),128
37 Meissner D, Memming R, Kastening B, et al.The Journal of Physical Chemistry, 1988, 92(12), 3476.
38 Meissner D, Lauermann I, Memming R, et al.The Journal of Physical Chemistry, 1988, 92(12), 3484.
39 Morrison S R.Electrochemistry at semiconductor and oxidized metal electrodes, Plenum Press, 1980.
40 Butler M A, Ginley D S.Journal of the Electrochemical Society, 1978, 125(2),228.
41 Xiang Q, Yu J, Jaroniec M.Journal of the American Chemical Society, 2012, 134(15),6575.
42 Ratcliff E L, Lee P A, Armstrong N R.Journal of Materials Chemistry, 2010, 20(13),2672.
43 Geng W, Zhao X, Liu H, et al.Journal of Physical Chemistry C, 2013, 117(20),10536.