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Research on the photocatalysis synergistic effect of Mo-X(B, C, N, O, F) codoped TiO2
Mo-X(B, C, N, O, F)共掺杂TiO2体系的光催化协同效应研究

Liang Pei,Wang Le,Xiong Si-Yu,Dong Qian-Min,Li Xiao-Yan,

物理学报 , 2012,
Abstract: The plane-wave ultrasoft pesudopotentials based on the density functional theory is used to study the formation energy, the electronic structure and the optical properties of molybdenum and different nonmetallic elements codoped anatase TiO2, where the nonmetallic elements are boron, carbon, nitrogen, oxygen and fluorine. Firstly, we calculate the total densities of states and the band structures of different kinds of codoping TiO2, and analyse the codoping modulation effect on band gap by using the energy band theory. Furthermore, we analyse the synergistic effects on stability and catalysis of TiO2 caused by codoping. And then the state of each atom's bond effect is obtained by analysing the total density map. Finally, we come to the conclusion that molybdenum-carbon codoping structure is superior to others on modulating the photocatalysis of TiO2 in visible light. Our theoretical research will be instructive and meaningful for photocatalysis area of TiO2 in the future.
Study on air purification by plasma combined with photocatalysis

Xu Taiming,Chen Gang,Niu Bingye,

环境工程学报 , 2007,
Abstract: A new method for plasma-photocatalysis combination was investigated.It is showed that this combination method had a quite notable synergistic effect,and the synergistic effect could be enhanced by adjusting the distance between plasma unit and photocatalysis unit and setting some nets between them to eliminate the influence of negative charges produced by plasma unit.The mechanism of the synergistic effect of this combination method was analyzed.
IJCCE: A Communication Platform for Cleaner Production and Sustainability  [PDF]
Jianjun Zhang
International Journal of Clean Coal and Energy (IJCCE) , 2013, DOI: 10.4236/ijcce.2013.24006
Abstract: IJCCE: A Communication Platform for Cleaner Production and Sustainability
Heterogeneous Photocatalysis: Fundamentals and Application for Treatment of Polluted Air  [PDF]
Jovi?, F.,Toma?i?, V.
Kemija u Industriji , 2011,
Abstract: The use of heterogeneous photocatalysts for the abatement of environmental problems has received increased attention during the last three decades. The photocatalyst used in most of these studies was titanium dioxide. This fact relates to the unique physical and chemical properties of titanium dioxide and similar semiconductor materials, such as ZnO, MgO,WO3, Fe2Oa, CdS, etc. that may be utilized for a wide range of potential applications. Specifically, upon ultraviolet irradiation these materials exhibit photocatalytic activity that enables the oxidative destruction of a wide range of organic compounds and biological species on their surface. In addition, these materials may also exhibit photocatalytically induced superhydrophilicity that converts the hydrophobic character of the surface to hydrophilic when exposed to UV light. This causes the formation of uniform water films on the surface of these materials, which prevents the adhesion of inorganic or organic components and thus retains a clean surface on the photocatalyst. Photocatalytic materials may be deployed on surfaces of various substrates, such as glass, ceramics or metals to provide layers that exhibit photocatalytic activity when they are exposed to light. Excitation of a photocatalyst leads to the creation of electrons and holes in the semiconductor material. Furthermore, these electrons and holes interact with molecules adsorbed on the semiconductor and can induce charge transfer process that results in the degradation of the adsorbate. The commercial potentials of heterogeneous photocatalysis are huge, including medical applications, application in the field of architecture (particularly for the cultural heritage purposes, facade paints, etc.), automotive and food industries (cleaner technologies, non-fogging glass and mirrors, product safety), textile and glass industry, as well as in environmental protection (water and air purification and disinfection). After the discovery that the photocatalytic degradation of organic compounds is generally more efficient in the gas phase than in the liquid phase, and the fact that the treatment cost may be significantly lower than that of the water phase photocatalytic treatment, the scientific interest has shifted towards the application of photocatalysis for air treatment. This paper describes the basics of heterogeneous photocatalysis, mainly on TiO2 and the application of photocatalytic processes for air treatment purposes. Review of more interesting practical application of heterogeneous photocatalysis for the treatment of polluted air is pres
Cleaner birds: an overview for the Neotropics
Sazima, Ivan;Sazima, Cristina;
Biota Neotropica , 2010, DOI: 10.1590/S1676-06032010000400025
Abstract: several bird species feed on a variety of external parasites and epibionts, organic debris, dead and wounded tissue, clots and blood, and secretions from the body of other vertebrates (hosts or clients). we present an overview of so called cleaner birds from the neotropics based on field records, literature, and photo survey. we found that 33 bird species in 16 families practice cleaning even if some of them do so very occasionally. the birds range from the galápagos ground finch geospiza fuliginosa to the widespread black vulture coragyps atratus. clients mostly are large herbivores such as capybaras, deer, and livestock, but also include medium-sized herbivores such as iguanas and tortoises, and carnivores such as boobies and seals - a few bird species associate with these latter marine mammals. no carnivorous terrestrial mammal client is recorded to date except for a domestic dog, from whose hair black vultures picked organic debris. some clients adopt particular inviting postures while being cleaned, whereas others are indifferent or even disturbed by the activity of cleaner birds. capybaras, giant tortoises, and iguanas are among the inviting clients, whereas boobies try to dislodge the 'vampire' finch geospiza difficilis. most of the neotropical cleaner birds may be lumped in one broad category (omnivores that dwell in open areas and associate with large to medium-sized herbivores). a second, restricted category accommodates some species from patagonia and the galápagos islands (omnivores that dwell in open areas and associate with carnivorous marine mammals, or seabirds and marine reptiles). two still more restricted categories accommodate the following: 1) forest-dwelling cleaner birds; and 2) marine coastal cleaners. additional records of neotropical cleaner birds will mostly fall in the broad category.
Suggested terms and definitions in photocatalysis and radiocatalysis  [PDF]
N. Serpone,A. V. Emeline
International Journal of Photoenergy , 2002, DOI: 10.1155/s1110662x02000144
Abstract: This document has two principal goals. First, it summarizes some of the issues that pertain to the complexities encountered in photocatalysis. Secondly, it presents suggested terms and definitions proposed to describe those phenomena, which fall under the umbrella of “photocatalysis” and “radiocatalysis”. A distinction is made between the different phenomena that are related to either or both photochemistry and photocatalysis, and to radiation chemistry and radiocatalysis. Consistent definitions of terms in these areas are given. Definitions of important parameters that describe photocatalytic and radiocatalytic phenomena quantitatively are also proposed. As with the related Glossary of Terms in Photochemistry, this document is a dynamic working document to provide the base for lively discussion and debate by the interested community. The terms and definitions will no doubt need to be revisited from time to time as the fields of photocatalysis and radiocatalysis progress and new discoveries reported. Some of the terms used in photochemistry are also given for completion, either verbatim or modified to address the issues of photocatalysis.
Photocatalysis—A Special Issue on a Unique Hybrid Area of Catalysis  [PDF]
Cooper H. Langford
Catalysts , 2012, DOI: 10.3390/catal2030327
Abstract: An overview of the development of photocatalysis with an identification of contemporary areas of interest. Photocatalysis is placed in the broad field of catalysis.
GENIUS: Generating Usable User Interfaces  [PDF]
Jean-Sebastien Sottet,Alain Vagner
Computer Science , 2013,
Abstract: In this report we describe the implementation and approach developed during the GENIUS Project. The GENIUS project is about the generation of usable user interfaces. It tries to cope with issues related to automatic generation where, usually end-user complain about the poor quality (in term of usability) of generated UI. To solve this issue GENIUS relies on Model-Driven Engineering principles and several MDE tools. Notably, it consists in a set of metamodels specific to the interaction, a set of model transformation embedding usability criteria and an environment for model execution/ interpretation.
Photocatalysis of Naphthenic Acids in Water  [PDF]
Sabyasachi Mishra, Venkatesh Meda, Ajay K. Dalai, Dena W. McMartin, John V. Headley, Kerry M. Peru
Journal of Water Resource and Protection (JWARP) , 2010, DOI: 10.4236/jwarp.2010.27074
Abstract: Naphthenic acids (NAs) are soluble in water and are concentrated in oil sand process water (OSPW) as a result of caustic oil sands extraction processes. Significant environmental and regulatory attention has been focused on the naphthenic acids. A laboratory scale photocatalysis system was developed using UV254 florescent lamps. Experiments were conducted to determine the NA degradation efficiency of this system in presence of TiO2 catalyst. Degradation kinetics for total NAs as well as individual z-families was calculated. The developed treatment system was able to degrade OSPW NAs with half life values ranging between 1.55 and 4.80 h. This system also completely reduced the acute toxicity associated with NAs (up to 5 min. IC50 v/v > 90%) based on Microtox assays.
ПРОЦЕС ПРОМИВАННЯ ГРАВ ТАЦ ЙНОГО ОЧИСНИКА В Д ЗАБРУДНЕНЬ МИЙНИМИ ЗАСОБАМИ The process of flushing the gravitational cleaner from pollution cleansers Процес мытья гравитационного очистителя от загрязнений моющими средствами  [cached]
С.О. Пуз?к,В.С. Манз?й,В.О. Закревський,В.С. Шевчук
Proceedings of National Aviation University , 2010,
Abstract: Наведено результати анал тичних досл джень процесу в дновлення поверхн осаджувальних пластин грав тац йного очисника безперервно д промиванням його мийними засобами. Вир шальним у цьому процес подолання тертя ковзання частинками забруднення. During the dirt accumulation the operating efficiency of the cleaners is decreasing and can be restored by cleaning the surface of sedimental plates cleaner. The condition of washing cleaner from pollution is excess of stokes forces on sliding friction force and size that characterizes the roll friction. Inequalities for all computed values of stoke strength were arranged and solved relative to waste of certain cleaning fluids. Thus: the flushing gravity cleaner with considered detergents is possible, more efficient process is to wash with detergent that has higher kinematic viscosity coefficient. Эффективность работы очистителя с накоплением загрязнений понижается и может быть восстановлена очисткой поверхности осадительных пластин очистителя. Условием промывки очистителя от загрязнений является превышения стоксовской силы над силой трения скольжения и величиной, характеризующей трение качения. Составлены и решены неравности для всех найденных значений стоксовской силы относительно потерь некоторых моющих средств. Эффективность процесса промывки гравитационного очистителя зависит от коэффициента кинематической вязкости моющего средства.
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