نتایج جستجو برای: photocatalytic activity

تعداد نتایج: 1144897  

Bigdeli, Tania, Motiee, Fereshteh,

Introduction: In this research, TiO2-Zr nano-photocatalyst was firstly developed with the aim of improving the photocatalytic activity of titanium dioxide via sol-gel method. The recovery of catalysts in acidic, alkaline and thermal conditions was also studied. Method: This research was done on a laboratory scale. The structures and properties were recognized with (BET), (FT-IR), (FE-SEM), and...

Journal: :Ultrasonics sonochemistry 2017
Joon Yeob Lee Wan-Kuen Jo

In this study, an ultrasound-aided hydrothermal-impregnation method was used to synthesize three-dimensional (3D) urchin-like CdS-TiO2 nanostructures (UCTs) with variable CdS content. The photocatalytic efficiencies (for degrading limonene and toluene vapor) of UCTs synthesized using the ultrasound-aided process were greater than those of UCTs fabricated without ultrasound treatment. In additio...

Journal: :iranian journal of catalysis 2016
bahar khodadadi maryam bordbar

in this paper, undopedzno and co-znonano structureswith different molar ratio of cobalt have been synthesized by the sonochemical method. structure have been characterized by fourier transform (ftir) and uv–vis spectroscopy,scanning electron microscopy (sem), energy dispersive analytical x-ray (edax), and x-ray diffraction (xrd) methods. moreover, the direct band gap has been calculated by tauc...

2014
Dandan Lu Min Zhang Zhihua Zhang Qiuye Li Xiaodong Wang Jianjun Yang

Self-organized V-N co-doped TiO2 nanotube arrays (TNAs) with various doping amount were synthesized by anodizing in association with hydrothermal treatment. Impacts of V-N co-doping on the morphologies, phase structures, and photoelectrochemical properties of the TNAs films were thoroughly investigated. The co-doped TiO2 photocatalysts show remarkably enhanced photocatalytic activity for the CO...

Journal: :Angewandte Chemie 2012
Yun Zhao Clive Eley Jingping Hu John S Foord Lin Ye Heyong He Shik Chi Edman Tsang

Nb(2)O(5) nanorods and nanospheres were synthesized, and their photocatalytic activity for methylene blue decomposition in water compared. Nb(2)O(5) nanorods clearly displayed higher activity, despite their comparable surface area. With a shape-dependent surface acidity, hydrothermal stability, and high photoactivity, these Nb(2)O(5) nanorods are a unique and exciting nanomaterial for non-class...

2018
Ashish Kumar Christian Schuerings Suneel Kumar Ajay Kumar Venkata Krishnan

A novel graphitic carbon nitride (g-C3N4)-CaTiO3 (CTCN) organic-inorganic heterojunction photocatalyst was synthesized by a facile mixing method, resulting in the deposition of CaTiO3 (CT) nanoflakes onto the surface of g-C3N4 nanosheets. The photocatalytic activity of the as-synthesized heterojunction (along with the controls) was evaluated by studying the degradation of an aqueous solution of...

2017
Chunbo Liu Jibin Chen Huinan Che Kai Huang Paul A. Charpentier William Z. Xu Weidong Shi HongJun Dong

A few-layered CDs (carbon dots)/MoS2 nanosheet-coated hydrogenated TiO2 (H-TiO2) nanobelt heterostructures—referred to as CDs/MoS2@H-TiO2—with a flexible three-dimensional (3D) hierarchical configuration were prepared via a facial hydrothermal reaction. Note that the visible photocatalytic activity of H-TiO2 was improved compared with that of pristine rutile TiO2, which can be mainly attributed...

Journal: :Chemical communications 2010
Guangcheng Xi Jinhua Ye

Well-defined m-BiVO(4) nanoplates with exposed {001} facets have been synthesized by a facile hydrothermal route, without the use of any template or organic surfactant. The as-prepared m-BiVO(4) nanoplates exhibit greatly enhanced activity in the visible-light photocatalytic degradation of organic contaminants and photocatalytic oxidation of water for O(2) generation.

Journal: :Nanoscale 2014
W J Zhou Y H Leng D M Hou H D Li L G Li G Q Li H Liu S W Chen

Ag2O/TiO2 nanobelt heterostructures have been found to possess high ultraviolet photocatalytic activity, but a poor cycling performance. After a S-doping treatment, the obtained Ag2O/Ag2S2O7/TiO2 heterostructured nanobelts exhibited an enhanced and stable photocatalytic activity under both ultraviolet and visible light irradiation, which was exemplified by photo-degradation of organic pollutant...

Journal: :Journal of materials science. Materials in medicine 2012
Erik Unosson Cecilia Persson Ken Welch Håkan Engqvist

Numerous advanced surface modification techniques exist to improve bone integration and antibacterial properties of titanium based implants and prostheses. A simple and straightforward method of obtaining uniform and controlled TiO(2) coatings of devices with complex shapes is H(2)O(2)-oxidation and hot water aging. Based on the photoactivated bactericidal properties of TiO(2), this study was a...

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