MgAl-LDHs/TiO<sub>2</sub>复合光催化剂的制备及光催化性能

doi:10.11896/cldb.22050098

Abstract
Figure/Table
References
Related Citation (15)

Download:

Full Text ( PDF ) (8702KB)
Export: BibTeX | EndNote (RIS)

Abstract Based on the memory effect of hydrotalcite (LDHs), MgAl-LDHs/TiO₂ composites were synthesized. The materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and photoluminescence spectroscopy (PL). Using methylene blue (MB) as degradation material, the photocatalytic performance of MgAl-LDHs/TiO₂ under simulated sunlight was studied and the reaction conditions were optimized. Based on first principles theory, the band structure and state density of the composite system were calculated at atomic scale. The main active groups in the photocatalytic process were investigated and the possible photocatalytic reaction mechanism was proposed. The results showed that the agglomeration phenomenon of TiO₂in MgAl-LDHs/TiO₂ composites was improved, the adsorption capacity of the composite was greatly enhanced, and the photocatalytic activity of the composite was significantly improved compared with that of TiO₂. The degradation rate of methylene blue reached 95.3% within 40 min when the mass ratio of LDHs was 50% and the calcination temperature was 400 ℃. The main active groups in the photocatalytic reaction process are h⁺ and ·OH. The bandgap obtained by MgAl-LDHs/TiO₂ simulation calculation is 1.67 eV which is an indirect bandgap semiconductor. The photoresponse principle is transferred from O 2p in VB to hybrid Ti 3d and Al 3p in CB.

Key words： LDHs memory effect adsorption photocatalysis synergistic effect first principles photocatalysis mechanism

Published: 10 October 2023 Online: 2023-09-28

CLC number:

O643

Fund:Key Project of Natural Science Foundation of Zhejiang Province (LZ22E080003), Science and Technology Project of Zhejiang Provincial Department of Transport (202225), and Zhejiang Provincial Natural Science Foundation (LY20E080002).

	Service
	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	LIN Bowen
	XU Yidong
	YU Demi

Cite this article:

LIN Bowen,XU Yidong,YU Demi. Preparation and Photocatalytic Performance of MgAl-LDHs/TiO₂ Composite Photocatalyst[J]. Materials Reports, 2023, 37(19): 22050098-6.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.22050098 OR http://www.mater-rep.com/EN/Y2023/V37/I19/22050098

1 Chang Q, Jiang G D, Hu M X, et al. Environmental Science, 2014, 35(5), 1804(in Chinese).
常青, 江国栋, 胡梦璇, 等. 环境科学, 2014, 35(5), 1804
2 Kuśmierek K. Mechanisms&Catalysis, 2016, 119, 19.
3 He J Y, Jia Q M, Wu S S, et al. New Chemical Materials, 2014, 42(10), 230(in Chinese).
和佳媛, 贾庆明, 伍水生, 等. 化工新型材料, 2014, 42(10), 230
4 Kanan S, Moyet M A, Arthur R B, et al. Catalysis Reviews, 2019, 62(3), 1.
5 Komaraiah D, Radha E, Reddy M V R, et al. Surface and Interface Analysis, 2020, 53(2), 194.
6 Singh J, Juneja S, Soni RK, et al. Journal of Colloid and Interface Science, 2021, 590, 60.
7 Li D Y, Zhang W T, Zhang C. Materials Review, 2019, 33(23), 3900(in Chinese).
李大玉, 张文韬, 张超. 材料导报, 2019, 33(23), 3900.
8 Gong Y, Wang L L, Xu Y Q, et al. Materials Review, 2020, 34(S2), 1037(in Chinese).
巩云, 王龙龙, 徐亚琪, 等. 材料导报, 2020, 34(S2), 1037.
9 Jamil S, Alvi A R, Khan S R. Chemical Progress, 2019, 31(2), 394.
10 Liao Y M, Yu J, Wei S Q, et al. Environmental Science, 2021, 42(1), 293.
11 Wang Y, Qiao M, Li Y, et al. Small, 2018, 14, 1800136.
12 Chen S, Huang Y, Han X, et al. Chemical Engineering Journal, 2018, 359, 1679.
13 Li K, Liu M, Li S, et al. Journal of Alloys and Compounds, 2019, 817, 152712.
14 Fan G, Li F, Evans D G, et al. Chemical Society Reviews, 2014, 43(20), 7040.
15 Chubar N, Gilmour R, Gerda V, et al. Advances in Colloid and Interface Science, 2017, 245, 62.
16 Paredes S P, Valenzuela M A, Fetter G, et al. Journal of Physics and Chemistry of Solids, 2011, 72(8), 914.
17 Mascolo G, Mascolo M C. Microporous and Mesoporous Materials, 2015, 214, 246.
18 Huang Z, Wu P, Lu Y, et al. Journal of Hazardous Materials, 2013, 246-247, 70.
19 Jiang Y, Song Y, Li Y, et al. Acs Applied Materials & Interfaces, 2017, 9(43), 37645.
20 Xu Y D, Lin B W, Yu X N, et al. Construction and Building Materials, 2023, 377, 131122.
21 Guo M Y, Zhang X Q, Luo K, et al. Acta Scientiae Circumstantiae, 2021, 41(2), 504(in Chinese).
郭梦圆, 张雪乔, 罗坤, 等. 环境科学学报, 2021, 41(2), 504.
22 Wang L, Gao X, Cheng Y, et al. Journal of Photochemistry and Photo-biology A-chemistry, 2019, 369, 44.
23 Luo L J. Preparation of A novel TiO₂ composite photocatalyst for the removal of bisphenol A. Ph. D. Thesis, Kunming University of Science and Technology, China, 2015(in Chinese).
罗利军. 具有吸附/光催化协同功能的二氧化钛复合光催化剂的制备及去除双酚A的研究. 博士学位论文, 昆明理工大学, 2015.
24 Mourid E H, Mouchtari E M E, Mersly L E, et al. Journal of Photochemistry & Photobiology A Chemistry, 2020, 396, 112530.
25 ContrerasJC, Martínez S, García J L, et al. International Journal of Photoenergy, 2019, 6760, 1.
26 Hu J S, Wang H, Liu L, et al. Journal of Molecular Catalysis, 2013(5), 67(in Chinese).
胡金山, 王欢, 刘利, 等. 分子催化, 2013(5), 67.
27 Dai H W, Chen J X, Miao X Z, et al. China Environmental Science, 2018(1), 202(in Chinese).
戴慧旺, 陈建新, 苗笑增, 等. 中国环境科学, 2018(1), 202.
28 Manring L E, Kramer M K, Foote C S. Tetrahedron Letters, 1984, 25(24), 2523.