نتایج جستجو برای: photocatalytic materials

تعداد نتایج: 450182  

Journal: :Chemical communications 2011
Michael Nolan

Density functional theory simulations show that modifying rutile TiO(2) with metal oxide nanoclusters produces composite materials with potential visible light photocatalytic activity.

Journal: :Environmental technology 2014
C Andriantsiferana E F Mohamed H Delmas

A sequential adsorption/photocatalytic regeneration process to remove tartrazine, an azo-dye in aqueous solution, has been investigated. The aim ofthis work was to compare the effectiveness of an adsorbent/photocatalyst composite-TiO2 deposited onto activated carbon (AC) - and a simple mixture of powders of TiO2 and AC in same proportion. The composite was an innovative material as the photocat...

2017
Liqin Xiang Xiaopeng Zhao

TiO₂-based composites have been paid significant attention in the photocatalysis field. The size, crystallinity and nanomorphology of TiO₂ materials have an important effect on the photocatalytic efficiency. The synthesis and photocatalytic activity of TiO₂-based materials have been widely investigated in past decades. Based on our group's research works on TiO₂ materials, this review introduce...

Journal: :Chemical Society reviews 2012
Quanjun Xiang Jiaguo Yu Mietek Jaroniec

Graphene, a single layer of graphite, possesses a unique two-dimensional structure, high conductivity, superior electron mobility and extremely high specific surface area, and can be produced on a large scale at low cost. Thus, it has been regarded as an important component for making various functional composite materials. Especially, graphene-based semiconductor photocatalysts have attracted ...

Journal: :Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology 2013
Cláudia Gomes Silva Judith Monteiro Rita R N Marques Adrián M T Silva Cristina Martínez Moisés Canle Joaquim Luís Faria

Photochemical and photocatalytic degradation of the emerging pollutant trans-resveratrol has been studied under different irradiation wavelengths and using different TiO2 catalysts. trans-Resveratrol was more easily degraded when irradiated using the whole spectral range (UV-Vis) rather than with UV and near-UV to visible irradiation. The main intermediate of trans-resveratrol phototransformati...

Journal: :Molecules 2016
Tahereh Jafari Ehsan Moharreri Alireza Shirazi Amin Ran Miao Wenqiao Song Steven L Suib

Photocatalytic water splitting using sunlight is a promising technology capable of providing high energy yield without pollutant byproducts. Herein, we review various aspects of this technology including chemical reactions, physiochemical conditions and photocatalyst types such as metal oxides, sulfides, nitrides, nanocomposites, and doped materials followed by recent advances in computational ...

2017
Tilak Das Xavier Rocquefelte Robert Laskowski Luc Lajaunie Steṕhane Jobic Peter Blaha Karlheinz Schwarz

An investigation of the optical and excitonic properties of photocatalytic compounds based on both experimental and theoretical approaches is proposed. More specifically, this paper reports, for the first time, the local-field, optical anisotropy, and excitonic effects in BiVO4, an active photocatalytic material in the visible range. The analyses are based on electron energy-loss spectroscopy m...

2015
Valentina Buscio Stephan Brosillon Julie Mendret Martí Crespi Carmen Gutiérrez-Bouzán

After the dyeing process, part of the dyes used to color textile materials are not fixed into the substrate and are discharged into wastewater as residual dyes. In this study, a heterogeneous photocatalytic process combined with microfiltration has been investigated for the removal of C.I. Disperse Red 73 from synthetic textile effluents. The titanium dioxide (TiO2) Aeroxide P25 was selected as...

2018
Moritz F Kuehnel Erwin Reisner

Photocatalytic reforming of lignocellulosic biomass is an emerging approach to produce renewable H2 . This process combines photo-oxidation of aqueous biomass with photocatalytic hydrogen evolution at ambient temperature and pressure. Biomass conversion is less energy demanding than water splitting and generates high-purity H2 without O2 production. Direct photoreforming of raw, unprocessed bio...

Journal: :Physical chemistry chemical physics : PCCP 2014
Sho Kitano Atsuhiro Tanaka Keiji Hashimoto Hiroshi Kominami

Photocatalytic oxidation of benzyl alcohols in aqueous suspensions of rhodium ion-modified titanium(iv) oxide (Rh(3+)/TiO2) in the presence of O2 under irradiation of visible light was examined. In the photocatalytic oxidation of benzyl alcohol, benzaldehyde was obtained in a high yield (97%) with >99% conversion of benzyl alcohol. Rh(3+)/TiO2 photocatalysts having various physical properties w...

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