نتایج جستجو برای: photocatalytic materials

تعداد نتایج: 450182  

2012
Azam Anaraki Firooz Ali Reza Mahjoub Abbas Ali Khodadadi

The paper reports the preparation and photocatalytic activity of ZnO/SnO2 and SnO2 nanoparticles. These nanoparticles were synthesized by hydrothermal method. The products were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Their grain sizes are about 50-100 nm. The photocatalytic activities of these materials were investigated for congo red removal from aqueou...

Journal: :Polish journal of microbiology 2013
Katarzyna Pietrzak Beata Gutarowska

The purpose of this study was to determine the effectiveness of photocatalytic ionisation as a disinfection method for filter materials contaminated by microorganisms, and to assess how air relative humidity (RH), time and microbe type influence the effectiveness of this disinfection. In the quantitative analysis of a used car air filter, bacterial contamination equalled 1.2 x 10(5) cfu/cm2, fu...

2013
G. I. N. Waterhouse A. K. Wahab M. Al-Oufi V. Jovic D. H. Anjum D. Sun-Waterhouse J. Llorca H. Idriss

Tuning the photonic band gap (PBG) to the electronic band gap (EBG) of Au/TiO2 catalysts resulted in considerable enhancement of the photocatalytic water splitting to hydrogen under direct sunlight. Au/TiO2 (PBG-357 nm) photocatalyst exhibited superior photocatalytic performance under both UV and sunlight compared to the Au/TiO2 (PBG-585 nm) photocatalyst and both are higher than Au/TiO2 withou...

2010
J Choi H Park M R Hoffmann

Titanium dioxide (TiO2) was doped with the combination of several metal ions including platinum (Pt), chromium (Cr), vanadium (V), and nickel (Ni). The doped TiO2 materials were synthesized by standard sol-gel methods with the doping levels of 0.1 to 0.5 atom-%. The resulting materials were characterized by the X-ray diffraction (XRD), BET surface-area measurement, Scanning Electron Microscopy ...

2018
Chhabilal Regmi Bhupendra Joshi Schindra K. Ray Gobinda Gyawali Ramesh P. Pandey

Several photocatalytic nanoparticles are synthesized and studied for potential application for the degradation of organic and biological wastes. Although these materials degrade organic compounds by advance oxidation process, the exact mechanisms of microbial decontamination remains partially known. Understanding the real mechanisms of these materials for microbial cell death and growth inhibit...

Journal: :Physical chemistry chemical physics : PCCP 2016
Sajid Ali Ansari Mohammad Shahnawaze Ansari Moo Hwan Cho

Developing a high-performance photocatalyst and a photoelectrode with enhanced visible light harvesting properties is essential for practical visible light photocatalytic applications. Noble metal-free, highly visible light-active, elemental red phosphorus (RP) was prepared by a facile mechanical ball milling method, which is a reproducible, low cost and controllable synthesis process. The synt...

2016
Alberto Strini Giuseppina Roviello Laura Ricciotti Claudio Ferone Francesco Messina Luca Schiavi Davide Corsaro Raffaele Cioffi

This study presents an experimental overview for the development of photocatalytic materials based on geopolymer binders as catalyst support matrices. Particularly, geopolymer matrices obtained from different solid precursors (fly ash and metakaolin), composite systems (siloxane-hybrid, foamed hybrid), and curing temperatures (room temperature and 60 °C) were investigated for the same photocata...

2015
Karina Bustos-Ramírez Carlos Eduardo Barrera-Díaz Miguel De Icaza-Herrera Ana Laura Martínez-Hernández Reyna Natividad-Rangel Carlos Velasco-Santos

Graphite and graphene oxides have been studied amply in the last decade, due to their diverse properties and possible applications. Recently, their functionality as photocatalytic materials in water splitting was reported. Research in these materials is increasing due to their band gap values around 1.8-4 eV, and therefore, these are comparable with other photocatalysts currently used in hetero...

Journal: :Molecules 2015
John Anthony Byrne Patrick Stuart Morris Dunlop Jeremy William John Hamilton Pilar Fernández-Ibáñez Inmaculada Polo-López Preetam Kumar Sharma Ashlene Sarah Margaret Vennard

Photo-excitation of certain semiconductors can lead to the production of reactive oxygen species that can inactivate microorganisms. The mechanisms involved are reviewed, along with two important applications. The first is the use of photocatalysis to enhance the solar disinfection of water. It is estimated that 750 million people do not have accessed to an improved source for drinking and many...

2015
Daniel O. Sigle Liwu Zhang Sandrine Ithurria Benoit Dubertret Jeremy J. Baumberg

Enhanced plasmonic fields are a promising way to increase the efficiency of photocatalytic water splitting. The availability of atomically thin materials opens up completely new opportunities. We report photocatalytic water splitting on ultrathin CdSe nanoplatelets placed in plasmonic nanogaps formed by a flat gold surface and a gold nanoparticle. The extreme field intensity created in these ga...

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