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Chemosphere

Title:		"LED-driven photocatalysis of toluene, trichloroethylene and formaldehyde by cuprous oxide modified titanate nanotube arrays"
Author(s):		Chen CH; Peng YP;
Address:		"Institute of Environmental Engineering, National Sun Yat-sen University, Kaohsiung, 804, Taiwan. Institute of Environmental Engineering, National Sun Yat-sen University, Kaohsiung, 804, Taiwan. Electronic address: yppeng@mail.nsysu.edu.tw"
Journal Title:		Chemosphere
Year:		2022
Volume:		20210720
Issue:		Pt 1
Page Number:		131608 -
DOI:		10.1016/j.chemosphere.2021.131608
ISSN/ISBN:		1879-1298 (Electronic) 0045-6535 (Linking)
Abstract:		"In this study, cuprous oxide modified titanate nanotube arrays photocatalyst (Cu(2)O/TNAs), a p-n type hetero-structure, was successfully synthesized by square wave voltammetry electrodeposition method (SWVE) with copper (II) acetate monohydrate as precursor. Cu(2)O/TNAs photocatalysts were characterized by SEM, XRD, XPS, and UV-vis DRS to investigate the physical and chemical properties such as surface structure, light absorption, and element composition. Results of characterization indicated that the Cu(2)O nanoparticles (Cu(2)O NPs) were firmly deposited on the surface of TNAs without significant morphological change. The enhanced photocatalytic (PC) performance of as-synthesized materials was exemplified by the test of photocurrent, which revealing that the average photocurrent density of Cu(2)O/TNAs (0.95 muA cm(-2)) was 1.38 times higher than TNAs (0.69 muA cm(-2)) under 24.2 mW cm(-2) LED irradiation. Three VOCs (volatile organic compounds), namely, Toluene, Formaldehyde and Trichloroethylene can be completely removed in the Cu(2)O/TNAs PC process with rate constants (k(obs)) of 2.08 x 10(-2), 3.11 x 10(-2), and 6.58 x 10(-2) min(-1), respectively, with the effort of the synergism of the photo-generated holes and hydroxyl radicals. Detail mechanism of hetero-junction Cu(2)O/TNAs composite PC system was proposed to clarify the redox reaction"
Keywords:		Catalysis Copper Formaldehyde *Nanotubes Toluene *Trichloroethylene Cuprous oxide Photocatalytic oxidation Titanate nanotube arrays Volatile organic compounds;
Notes:		"MedlineChen, Chia-Hung Peng, Yen-Ping eng England 2021/07/24 Chemosphere. 2022 Jan; 286(Pt 1):131608. doi: 10.1016/j.chemosphere.2021.131608. Epub 2021 Jul 20"