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Design of Advanced Photocatalytic Materials for Energy and Environmental Applications
Research for the development of more efficient photocatalysts has experienced an almost exponential growth since its popularization in early 1970’s. Despite the advantages of the widely used TiO2, the yield of the conversion of sun power into chemical energy that can be achieved with this material is limited prompting the research and development of a number of structural, morphological and chemical modifications of TiO2 , as well as a number of novel photocatalysts with very different composition. Design of Advanced Photocatalytic Materials for Energy and Environmental Applications provides a systematic account of the current understanding of the relationships between the physicochemical ...
Quantum Dot
What Is Quantum Dot Quantum dots (QDs) are semiconductor particles a few nanometres in size, having optical and electronic properties that differ from larger particles due to quantum mechanics. They are a central topic in nanotechnology. When the quantum dots are illuminated by UV light, an electron in the quantum dot can be excited to a state of higher energy. In the case of a semiconducting quantum dot, this process corresponds to the transition of an electron from the valence band to the conductance band. The excited electron can drop back into the valence band releasing its energy by the emission of light. This light emission (photoluminescence) is illustrated in the figure on the right....
Green Chemistry, 2nd edition
Specific topics include: eco-friendly products green catalysts ionic liquids supercritical fluids green solvents photo-Fenton reaction photocatalysis sonochemistry microwave-assisted organic synthesis ultrasound-assisted reactions green composites green manufacturing processes
Nanomaterials for Water Treatment and Remediation
Offering a comprehensive view of water-treatment technologies, Nanomaterials for Water Treatment and Remediation explores recent developments in the use of advanced nanomaterials (ANMs) for water treatment and remediation. In-depth reaction mechanisms in water-treatment technologies, including adsorption, catalysis, and membrane filtration for water purification using ANMs, are discussed in detail. The book includes an investigation of the fabrication processes of nanostructured materials and the fundamental aspects of surfaces at the nanoscale. The book also covers the removal of water-borne pathogens and microbes through a photochemical approach. FEATURES Explains various chemical treatmen...
Kuantum Noktası
Kuantum Noktası Nedir? Kuantum noktaları (QD'ler), kuantum mekaniği nedeniyle daha büyük parçacıklardan farklı optik ve elektronik özelliklere sahip, birkaç nanometre boyutunda yarı iletken parçacıklardır. Nanoteknolojide merkezi bir konudur. Kuantum noktaları UV ışığı ile aydınlatıldığında, kuantum noktasındaki bir elektron daha yüksek bir enerji durumuna uyarılabilir. Yarı iletken bir kuantum noktası durumunda, bu süreç bir elektronun değerlik bandından iletkenlik bandına geçişine karşılık gelir. Uyarılmış elektron, ışık emisyonu ile enerjisini serbest bırakarak değerlik bandına geri düşebilir. Bu ışık emisyonu (fotolüminesans) sağdak...
The Encomenderos of New Spain, 1521-1555
While the Spanish conquistadors have been stereotyped as rapacious treasure seekers, many firstcomers to the New World realized that its greatest wealth lay in the native populations whose labor could be harnessed to build a new Spain. Hence, the early arrivals in Mexico sought encomiendas—"a grant of the Indians of a prescribed indigenous polity, who were to provide the grantee (the encomendero) tribute in the form of commoditiesand service in return for protection and religious instruction." This study profiles the 506 known encomenderos in New Spain (present-day Mexico) during the years 1521-1555, using their life histories to chart the rise, florescence, and decline of the encomienda system. The first part draws general conclusions about the actual workings of the encomienda system. The second part provides concise biographies of the encomenderos themselves.
Annual Report
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