Photocatalysis Photocatalysis is a rapidly developing field of research with a high potential for a wide range of industrial applications, which include mineralization of organic pollutants, disinfection of water and air, production of renewable fuels and organic syntheses. The word “photocatalysis” is of Greek origin and composes of two parts : the prefix “photo” (phos : light) and the word “catalysis” (katalyo : break apart,decompose). The main difference between a conventional thermal catalyst
Photocatalysis for water disinfection Although there are a lot of conventional water treatment methods available, but due to their disadvantages, there is a need for development of new and effective methods for disinfection of total waterborne pathogens in water treatment. In the near future, advanced oxidation process (AOPs) may become the most widely used water treatment technologies [30, 31, 32]. The processes can be categorized into three types: (1) Photolysis. (2) Homogeneous photocatalysis
2.7. Sol-Gel Method The sol–gel method allows the synthesis of TiO2 nanoparticles with different morphologies like sheets, tubes, particles, wires, rods, mesoporous and aerogels. The sol–gel method is also used due to the easy technique, low price, the purity of oxides obtained and the lower synthesis temperatures. The raw materials and methodologies differ according to the type of nanoparticles required finally. 97 % % titanium tetra iso propoxide (TTIP) has been utilized by several studies as
Photochemistry is the study of chemical reactions resulting from the exposure of light radiations. Light supplies the required energy to take place the photochemical reactions. The visible and UV radiations are mainly used in photochemical reactions. Many important processes in our daily life involve photochemistry. The best example is photosynthesis, in which most plants utilize the sunlight to convert carbon dioxide and water into glucose and release oxygen as a side product. The Grotthuss-Draper
ENVS 1301 INTRODUCTION TO ENVIRONMENTAL SCIENCES DISCUSSION ASSIGNMENT UNIT 5 This week, please look online and read the week’s learning guide and the textbook chapters. Then, research different forms of alternative (renewable) energy forms available. Choose two, and then answer the following questions: 1. What does the term “renewable” mean? 2. Which two renewable energy forms did you choose? 3. For each, describe two benefits. 4. For each, describe two drawbacks. 5. Which of these you feel would
Introduction “AOX” is the abbreviation of the sum parameter for water soluble “adsorbable organic halogens” in which ‘A’ stands for adsorbable, ‘O’ for organic and ‘X’ for the halogens chlorine, bromine and iodine. After the introduction of the AOX in 1976, this parameter has been correctly used for “real” AOX constituents (DDT and its metabolites, PCBs, etc.); but also misused for non-adsorbable adsorbed OX-compounds, mostly high molecular organohalogens in plants and even to inorganic compounds
Chapter-2 Efficient ZnO NPs catalyzed Friedlander annulations in the synthesis of diverse quinolin-2(1H)-ones 2.1.1 INTRODUCTION OF QUINOLINONES AND QUINOLINES The quinolinone and quinoline ring is highly prevalent in natural compounds. There are synthetic and potential agents, which show various pharmacological properties (Priya et al., 2012). Quinolinones are important structural intermediates for synthesis of functionalized quinolines (Baston et al., 2000). Quinolines have demonstrated various