Facile template-free one-pot fabrication of ZnCo2O4 microspheres with enhanced photocatalytic activities under visible-light illumination

2014 ◽  
Vol 239 ◽  
pp. 192-199 ◽  
Author(s):  
Hongxu Guo ◽  
Jianhua Chen ◽  
Wen Weng ◽  
Qingxiang Wang ◽  
Shunxing Li
Keyword(s):  
Visible Light ◽  
Light Illumination ◽  
One Pot ◽  
Visible Light Illumination ◽  
Photocatalytic Activities ◽  
Template Free

scholarly journals Hierarchical rattle-like N-doped anatase TiO2 superstructure: one-pot synthesis, morphological evolution and superior visible light photocatalytic activity

2016 ◽  
Vol 6 (9) ◽  
pp. 3108-3116 ◽  
Author(s):  
Guoliang Li ◽  
Gang Li ◽  
Jie Li ◽  
Guibin Jiang
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Morphological Evolution ◽  
Light Illumination ◽  
One Pot ◽  
Ultrathin Nanosheets ◽  
Porous Core ◽  
Visible Light Illumination ◽  
Template Free ◽  
Visible Light Photocatalytic

A novel N-doped rattle-like hierarchical anatase superstructure with a spherical porous core and hierarchical shell composed of ultrathin nanosheets was synthesized via a facile template-free method, which exhibits enhanced photocatalytic activity under visible light illumination.

scholarly journals One-Pot Synthesis of Cu2O/Cu Self-Assembled Hollow Nanospheres with Enhanced Photocatalytic Performance

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Bo Zhou ◽  
Zhiguo Liu ◽  
Haijun Zhang ◽  
Yan Wu
Keyword(s):  
Photocatalytic Performance ◽  
Hollow Spheres ◽  
Hollow Structure ◽  
Light Illumination ◽  
One Pot ◽  
Thermal Synthesis ◽  
Synthesis Time ◽  
Visible Light Illumination ◽  
Template Free ◽  
Solid Spheres

Cu2O/Cu hollow spheres are prepared using one-pot template-free solvent-thermal synthesis route with (CH3COO)2Cu·H2O as a precursor. With the reaction time increasing gradually from 2 h to 20 h, the morphology of the Cu2O/Cu evolves from nanoparticle to hollow nanosphere. The hollow structure is obtained when the cooling rate falls down to 0.7°C/min. And the content of Cu in the hollow spheres also can be easily controlled by adjusting the solvent-thermal synthesis time. Using photocatalytic degradation of phenol as the probe molecules under visible-light illumination, we have investigated the influence of hollow structure on the photocatalytic activity of Cu2O/Cu. The prepared hollow sphere Cu2O/Cu particles exhibited a higher photodegradation capability than nanoparticles and solid spheres. When the content of Cu lies in the range of 11–86 wt%, the samples exhibit higher photocatalytic performance, indicating that the Cu2O/Cu particles with hollow structure are promising candidates for the processing of pollutants.

scholarly journals Photodehydrogenation of Ethanol over Cu2O/TiO2 Heterostructures

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1399
Author(s):  
Congcong Xing ◽  
Yu Zhang ◽  
Yongpeng Liu ◽  
Xiang Wang ◽  
Junshan Li ◽  
...  
Keyword(s):  
Visible Light ◽  
Chemical Properties ◽  
Cost Effective ◽  
Light Illumination ◽  
Reaction Conditions ◽  
One Pot ◽  
Highly Active ◽  
Visible Light Illumination ◽  
Photocatalytic Reactors ◽  
Acetaldehyde Production

The photodehydrogenation of ethanol is a sustainable and potentially cost-effective strategy to produce hydrogen and acetaldehyde from renewable resources. The optimization of this process requires the use of highly active, stable and selective photocatalytic materials based on abundant elements and the proper adjustment of the reaction conditions, including temperature. In this work, Cu2O-TiO2 type-II heterojunctions with different Cu2O amounts are obtained by a one-pot hydrothermal method. The structural and chemical properties of the produced materials and their activity toward ethanol photodehydrogenation under UV and visible light illumination are evaluated. The Cu2O-TiO2 photocatalysts exhibit a high selectivity toward acetaldehyde production and up to tenfold higher hydrogen evolution rates compared to bare TiO2. We further discern here the influence of temperature and visible light absorption on the photocatalytic performance. Our results point toward the combination of energy sources in thermo-photocatalytic reactors as an efficient strategy for solar energy conversion.

scholarly journals Fabrication of the heterojunction catalyst BiVO 4 /P25 and its visible-light photocatalytic activities

2018 ◽  
Vol 5 (8) ◽  
pp. 180752 ◽  
Author(s):  
Heshan Cai ◽  
Linmei Cheng ◽  
Feng Xu ◽  
Hailong Wang ◽  
Weicheng Xu ◽  
...  
Keyword(s):  
Visible Light ◽  
Organic Contaminants ◽  
Photocatalytic Performance ◽  
Light Illumination ◽  
Xps Spectra ◽  
Visible Light Illumination ◽  
Photocatalytic Activities ◽  
Catalytic Stability ◽  
One Step ◽  
Ft Ir

A heterojunction catalyst, BiVO 4 /P25, was successfully fabricated using a one-step hydrothermal method. The prepared composite was characterized using XRD, XPS, Raman, FT-IR, UV–vis, SEM, HRTEM and PL. The HRTEM pictures revealed that the heterostructured composite was composed of BiVO 4 and P25, and from the pictures of SEM we could see the P25 nanoparticles assembling on the surface of flower-shaped BiVO 4 nanostructures. The XPS spectra showed that the prepared catalyst consisted of Bi, V, O, Ti and C. The photocatalytic activity of BiVO 4 /P25 was evaluated by degraded methyl blue (MB) and tetracycline under visible light illumination ( λ > 420 nm), and the results showed that BiVO 4 /P25 composite has a better photocatalytic performance compared with pure BiVO 4 and the most active c-BiVO 4 /P25 sample showed enough catalytic stability after three successive reuses for MB photodegradation. The enhanced photocatalytic performance could mainly be attributed to the better optical absorption ability and good absorption ability of organic contaminants.

scholarly journals Enhancing the photocatalytic activity of Ag-TiO2/SiO2 and its potential application in water treatment

2021 ◽  
Vol 947 (1) ◽  
pp. 012016
Author(s):  
Thi-Ngoc-Suong Ho ◽  
Manh-Thang Ngo ◽  
Minh-Vien Le
Keyword(s):  
Water Treatment ◽  
Visible Light ◽  
Sol Gel ◽  
Light Response ◽  
Molar Ratio ◽  
Light Illumination ◽  
Visible Light Response ◽  
Visible Light Illumination ◽  
Photocatalytic Activities

Abstract Ag-doped TiO2/SiO2 with visible light response was prepared by a simple sol-gel method using titanium w-butoxide (TNB), tetraethoxysilane (TEOS) as precursors, and silver nitrate (AgNO3). The synthesized Ag-TiO2/SiO2 were characterized by SEM, XRD, PL (photoluminescence) emission and UV-Vis absorption spectroscopy. Their photocatalytic activities were evaluated by treating aqueous solutions of phenol under simulated visible light illumination. The role of silver doped was investigated in the range 1% – 5% (molar ratio), resulting in the best bandgap value of 2.93 eV for Ag(3%)-TiO2/SiO2 compared to 3,18 eV for the un-doped TiO2/SiO2. Consequently, the best phenol treating yield – about 97% after 4 hours – was obtained using Ag(3%)-TiO2/SiO2. So the synthesized Ag(3%)-TiO2/SiO2 might serve as a potential photocatalyst for water treatment using visible lights.

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