نتایج جستجو برای: Gas Phase Photodegradation

تعداد نتایج: 816213  

Abbas Ahmadi, Babak Nahri-Niknafs Seyed-Ali Sobhanian

Chlorpyrifos is an organophosphate insecticide, used to control foliage and soil-borne insect pests on a variety of food and feed crops. In the natural environment, Chlorpyrifos can be degraded  through  several  possible  processes,  including  photodegradation, biodegradation,  and hydrolysis.  In  the  present  work  the  photodegradation  and  environmental  fate  of  Chlorpyrifos  in aqueo...

2012
Is Fatimah

Titania pillared montmorillonite from Indonesian montmorillonite by using titanium isopropoxide as precursor was successfully prepared. Physico-chemical character of material by using x-ray diffraction, gas sorption analyzer, diffuse reflectance UV-Visible, scanning electron microscope (SEM) and energy dispersive x-ray (EDAX) showed the dipersion of titania in dominantly anatase phase that is t...

Journal: :Dalton transactions 2011
Hengchao Zhang Hai Ming Suoyuan Lian Hui Huang Haitao Li Lili Zhang Yang Liu Zhenhui Kang Shuit-Tong Lee

In this study, we report the facile fabrication of Fe(2)O(3)/CQDs nanocomposites, and investigate their effective photocatalytic activity for the photodegradation of toxic gas (gas-phase benzene and methanol) under visible light. The crucial roles of CQDs in the enhancement of photocatalytic activity of the Fe(2)O(3)/CQDs composites are illustrated.

Journal: :journal of sciences islamic republic of iran 0

an on-line automated method for photodegradation studies of isoproturon, diuron, atrazine, fenitrothion, and metoxuron by means of liquid chromatography/mass spectrometry (lc/ms) with particle beam (pb) interface is described. surface water samples were first spiked with 50 µg/l of each pesticide and then exposed to the radiation of the medium-pressure mercury lamp. next, in regular intervals o...

An on-line automated method for photodegradation studies of isoproturon, diuron, atrazine, fenitrothion, and metoxuron by means of liquid chromatography/mass spectrometry (LC/MS) with particle beam (PB) interface is described. Surface water samples were first spiked with 50 µg/l of each pesticide and then exposed to the radiation of the medium-pressure mercury lamp. Next, in regular intervals o...

A series of CuO-Cu2O/TiO2 nanocomposite samples were prepared by the sol-gel method. Before applying the sol-gel method, the Cu(OH)2 nanostructure on Cu powders were formed by in-situ solution treatment. The samples were characterized through some techniques and the photocatalytic performance of CuO-Cu2O/TiO2 nanocomposites for gas-phase 2-propanol photo-oxidation under UV and sunlight type ill...

Journal: :Acta chimica Slovenica 2014
Rong Xing Lin Wu Zhenghao Fei

A versatile photocatalyst has been prepared by grafting palladium phthalocyaninesulfonate (PdPcS) onto the FDU-14 mesopolymer with 3-D cubic mesostructure (FDU-14-PdPcS) via multi-step chemical modification processes. The FDU-14-PdPcS was characterized by the X-ray diffraction (XRD), diffuse reflectance UV-vis spectroscopy and inductively coupled plasma (ICP) techniques. In the photodegradation...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز 1381

جهت افزایش مقاومت به اکسیداسیون سوپرآلیاژهای پایه نیکل ، ایجاد پوشش مناسب بر روی این آلیاژها ضروری است. در تحقیق حاضر برای بررسی عملیات پوشش، نمونه هایی از جنس سوپرآلیاژ پایه نیکل ‏‎gtd-111‎‏ تهیه شد و عملیات آلومینایزینگ فاز گازی ‏‎gas phase aluminizing‎‏ بر روی آنها انجام شد. بررسی نتایج حاکی از ایجاد یک پوشش نفوذی از نوع آلومیناید می باشد. یکنواختی ضخامت پوشش در حد مطلوب است. با افزایش زمان ...

Journal: :Environmental toxicology and chemistry 2008
Xia Zeng Staci L Massey Simonich Kristin R Robrock Peter Korytár Lisa Alvarez-Cohen Douglas F Barofsky

With the phaseout of the manufacture of some polybrominated diphenyl ether (PBDE) formulations, namely penta-brominated diphenyl ether (BDE) and octa-BDE, and the continued use of the deca-BDE formulation, it is important to be able to predict the photodegradation of the more highly brominated congeners. A model was developed and validated to predict the products and their relative concentratio...

2005
Panagiotis G. Smirniotis

The present research project aims at developing novel photocatalysts for the destruction of chemical warfare agents to innocuous products in gas and liquid phases. The project focuses on understanding the chemistry involved during photodegradation of selected simulants, which can effectively represent chemical warfare agents such as HD, G-type (GA, GB, GD) and VX. Studies addressing the destruc...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید