نتایج جستجو برای: photocatalytic activity

تعداد نتایج: 1144897  

2016
Jamal Al-Sabahi Tanujjal Bora Mohammed Al-Abri Joydeep Dutta

Environmental pollution from human and industrial activities has received much attention as it adversely affects human health and bio-diversity. In this work we report efficient visible light photocatalytic degradation of phenol using supported zinc oxide (ZnO) nanorods and explore the role of surface defects in ZnO on the visible light photocatalytic activity. ZnO nanorods were synthesized on ...

2017
Bitao Liu Xuelian Yan Hengqing Yan Yucen Yao Yanhua Cai Jumeng Wei Shanyong Chen Xuhui Xu Lu Li

Molybdenum (Mo) doped BiVO₄ was fabricated via a simple electrospun method. Morphology, structure, chemical states and optical properties of the obtained catalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (DRS), N₂ adsorption-desorptio...

1997
Carl Anderson Allen J. Bard

The characterization of mixed oxides of TiO2/SiO2 and TiO2/Al2O3 prepared by sol-gel methods is described. Application of the TiO2/Al2O3 material for the photocatalytic decomposition of salicylic acid gave improved activity relative to TiO2-only materials. The photocatalytic activity of TiO2/SiO2, TiO2/Al2O3, and TiO2 toward the photocatalytic decomposition of phenol demonstrated the enhancemen...

2013
Shintaro Ida Yohei Okamoto Hidehisa Hagiwara

Sr2−xBaxTa3O10−yNz (x = 0.0, 0.5, 1.0) nanosheets were prepared by exfoliating layered perovskite compounds (CsSr2−xBaxTa3O10−yNz). The Sr1.5Ba0.5Ta3O9.7N0.2 nanosheet showed the highest photocatalytic activity for H2 production from the water/methanol system among the Sr2−xBaxTa3O9.7N0.2 nanosheets prepared. In addition, Rh-loaded Sr1.5Ba0.5Ta3O9.6N0.3 nanosheet showed the photocatalytic activ...

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In the present study, zinc oxide nanoparticles in three different forms (spherical, rod and sheet) were synthesized by a hydrothermal method. The obtained products were characterized by X-ray diffraction (XRD), filed emission scanning electron microscopy (FESEM), EDX elemental analysis and UV-Vis spectroscopy. The photocatalytic properties were investigated using congo red (CR) degradation unde...

2015
Hoai Nga Le Frank Babick Klaus Kühn Minh Tan Nguyen Michael Stintz Gianaurelio Cuniberti

The effectiveness of photocatalytic materials increases with the specific surface area, thus nanoscale photocatalyst particles are preferred. However, such nanomaterials are frequently found in an aggregated state, which may reduce the photocatalytic activity due to internal obscuration and the extended diffusion path of the molecules to be treated. This paper investigates the effect of aggrega...

2016
Haijin Li Wenguang Tu Yong Zhou Zhigang Zou

Semiconductor photocatalysts have attracted increased attention due to their great potential for solving energy and environmental problems. The formation of Z-scheme photocatalytic systems that mimic natural photosynthesis is a promising strategy to improve photocatalytic activity that is superior to single component photocatalysts. The connection between photosystem I (PS I) and photosystem II...

Journal: :advances in environmental technology 0
amin ahmadpour wastewater

environmental contamination, which is growing around the world, is a serious problem can not to be neglected. among all contaminations, water pollution is a major problem. azo dyes are one of the largest groups of pollutants found in the drinking water, coming from, and the food and textile industries. tio2/fe3o4 and tio2/fe2o3 nanocomposites with various ratios were synthesized by an ultrasoni...

Journal: :Small 2014
Sanyang Han Xiaogang Liu

Composite heteronanostructures hold promise for high photocatalytic efficiency for water splitting and the degradation of organic pollutants. However, their photocatalytic activity under broadband excitation has been challenging, until now.

Journal: :Chemistry 2016
Da-Ren Hang Krishna Hari Sharma Chun-Hu Chen Sk Emdadul Islam

We exploit the utilization of two-dimensional (2D) molybdenum oxide nanoflakes as a co-catalyst for ZnO nanorods (NRs) to enhance their photocatalytic performance. The 2D nanoflakes of orthorhombic α-MoO3 were synthesized through a sonication-aided exfoliation technique. The 2D MoO3 nanoflakes can be further converted to substoichiometric quasi-metallic MoO3-x by using UV irradiation. Subsequen...

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