scholarly journals Heterogeneous Deposition of Cu2O Nanoparticles on TiO2Nanotube Array Films in Organic Solvent

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Xinwen Huang ◽  
Zongjian Liu
Keyword(s):  
Methyl Orange ◽  
Ethylene Glycol ◽  
Organic Solvent ◽  
Visible Light ◽  
Electrochemical Method ◽  
Simulated Sunlight ◽  
Organic Solution ◽  
Nanotube Array ◽  
Cu2o Nanoparticles ◽  
Novel Method

A novel method for decoration of anodic TiO2nanotube array films (NAFs) with Cu2O nanoparticles has been reported. The method is based on the reduction of Cu(II) in a mixture of ethylene glycol and N,N-dimethylformamide at 120°C for 16 h, where the resulting Cu2O can heterogeneously nucleate and grow on TiO2NAFs. The nanosized Cu2O is found to be well dispersed on the wall of TiO2nanotubes without blocking the nanotube, a commonly observed phenomenon in the case of deposition of Cu2O via electrochemical method. The amount of Cu2O deposited on the TiO2NAFs can be varied by adjusting the concentration of Cu(II) in the organic solution. UV-vis spectra measurement indicates that the decoration of TiO2NAFs with Cu2O nanoparticles greatly improves their ability to respond to visible light. By examining the photocurrent and photodegradation of methyl orange under simulated sunlight, it is found that these Cu2O-decorated TiO2NAFs show much more photoactive in comparison with the as-prepared TiO2NAFs.

Preparation and Photocatalytic Performance of SO42-/CeO2-TiO2/HTLC

2014 ◽  
Vol 1073-1076 ◽  
pp. 3-7
Author(s):  
Ru Jun Xue ◽  
Chun Yang Chen ◽  
Shu Fen Cheng ◽  
Min Zhou
Keyword(s):  
Methyl Orange ◽  
Synergistic Effect ◽  
Visible Light ◽  
Active Component ◽  
Photocatalytic Performance ◽  
Experimental Results ◽  
Catalyst Precursor ◽  
Simulated Sunlight ◽  
Absorption Intensity ◽  
Decolorization Rate

Catalyst precursor was prepared with the Fe-Al hydrotalcite as the support, Ce-doped TiO2 as the active component. Then SO42-/CeO2-TiO2/HTLC photocatalyst was obtained by SO42- -modification with soak method. Catalysts were characterized by means of XRD, SEM-EDS and UV-Vis DRS. With methyl orange as model pollutant, the photocatalytic performance of the catalysts was determined. Experimental results showed that the absorption intensity for visible light of the CeO2-TiO2 particle was stronger than that of TiO2 particle; moreover there was a synergistic effect between SO42- and CeO2-TiO2/HTLC, thus the absorption intensity for visible light of SO42-/CeO2-TiO2/HTLC photocatalyst was enhanced further. The decolorization rate for methyl orange of modified SO42-/15%(CeO2-TiO2)/HTLC photocatalyst reached 93% after irradiation under simulated sunlight for 2 hours.

scholarly journals Study on Fabrication and investigation of the effects of copper salt precursor with different anions SO42-, Cl-, CH3COO- and NO3- on the structure and photocatalytic properties for decomposition of methyl orange dye of octahedral Cu2O nanoparticles

2020 ◽  
Vol 9 (3) ◽  
pp. 112-117
Author(s):  
Mai Nguyen Thi Tuyet ◽  
Hue Dang Thi Minh ◽  
Lam Nguyen Thi ◽  
Huyen Tran Thi Thu ◽  
Nga Nguyen Kim ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Visible Light ◽  
Rate Constant ◽  
Decomposition Reaction ◽  
Raman Shift ◽  
Photocatalytic Efficiency ◽  
Copper Salts ◽  
Optical Gap Energy ◽  
Cu2o Nanoparticles ◽  
Methyl Orange Dye

The octahedra single-phase Cu2O nanoparticles were fabricated from copper salts precursors with different anions including SO42-, Cl-, CH3COO- and NO3-. The prepared materials were characterized by: XRD, Raman shift, SEM, solid UV-vis absorption spectra. The photocatalytic activity and decomposition reaction kinetics for methyl orange dye of the prepared Cu2O samples under visible light irradiation were also studied in this experiment. The results showed that the fabricated Cu2O materials all had a nanometer-sized crystal particles arranged in about of 300-1000 nm with the octahedral particle shape. The narrow optical gap energy of Cu2O samples achieved Eg» 1.83-2.01 eV. The fabricated Cu2O samples all had the high photocatalytic efficiency in decomposition of methyl orange dye (MO) under visible light when added with H2O2 assisted catalyst. The photocatalytic efficiency of the Cu2O-(SO42-)/H2O2 sample was the highest, reaching 99.2% with the rate constant k= 0.10132 min-1. The photocatalytic efficiency of the Cu2O-(CH3COO-)/H2O2 sample was the smallest, reaching 97.6% with the rate constant k= 0.09098 min-1

Metal‐Free and Heterogeneous Photocatalytic Reduction of 4‐Nitroaniline by a Poly(Ethylene Glycol)‐Supported Eosin Dye under Visible‐Light Exposure

ChemCatChem ◽  
2019 ◽  
Vol 11 (14) ◽  
pp. 3307-3317
Author(s):  
Andreea L. Chibac ◽  
Violeta Melinte ◽  
Vlasta Brezová ◽  
Estelle Renard ◽  
Arnaud Brosseau ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Visible Light ◽  
Light Exposure ◽  
Photocatalytic Reduction ◽  
Poly Ethylene Glycol ◽  
Metal Free ◽  
Poly Ethylene

Boron-Doped TiO2 (B-TiO2): Visible-Light Photocatalytic Di-functionalization of Alkenes and Alkynes

2021 ◽  
Author(s):  
Mona Hosseini-Sarvari ◽  
Atefe Valikhani
Keyword(s):  
Visible Light ◽  
Doped Tio2 ◽  
Boron Doped ◽  
Novel Method ◽  
Visible Light Photocatalytic

Boron doped TiO2 (B-TiO2) was prepared, characterized, and successfully applied as a reusable, inexpensive, available, and heterogeneous nano photocatalyst under visible light for a novel method of construction of phenacyl...

scholarly journals Correction: 3D Au-decorated Bi2MoO6 nanosheet/TiO2 nanotube array heterostructure with enhanced UV and visible-light photocatalytic activity

2017 ◽  
Vol 5 (31) ◽  
pp. 16422-16422 ◽  
Author(s):  
Jingsheng Cai ◽  
Jianying Huang ◽  
Yuekun Lai
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Tio2 Nanotube ◽  
Tio2 Nanotube Array ◽  
Nanotube Array ◽  
Visible Light Photocatalytic Activity ◽  
Visible Light Photocatalytic

Correction for ‘3D Au-decorated Bi2MoO6 nanosheet/TiO2 nanotube array heterostructure with enhanced UV and visible-light photocatalytic activity’ by Jingsheng Cai et al., J. Mater. Chem. A, 2017, DOI: 10.1039/c7ta02077e.

Crystal and electronic structures, and photoluminescence and photocatalytic properties of α-EuZrS3

2016 ◽  
Vol 40 (12) ◽  
pp. 10219-10226 ◽  
Author(s):  
Sheng-Ping Guo ◽  
Yang Chi ◽  
Jian-Ping Zou ◽  
Huai-Guo Xue
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Electronic Structures ◽  
Photocatalytic Properties ◽  
Simulated Sunlight ◽  
Sunlight Irradiation

Novel crystalline α-EuZrS3 shows Eu2+ photoluminescence and is photocatalytically active towards the decomposition of methylene blue under visible light or simulated sunlight irradiation.

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