Technology development in nano-sized photocatalyst powder preparation technologies

Nano-sized semiconductor powders for use as photocatalysts have great potential in environmental and energy engineering applications. The photocatalytic activity of photocatalyst is significantly affected by preparation process since the crystalline structure of photocatalyst is dependent on preparation conditions. This paper aims to give an overview of the research progress of nano-sized photocatalyst powder preparation technologies, including solid route, gas phase route, and liquid route. The advantages and disadvantages of different preparation technologies are analyzed and compared. The research direction and prospect of photocatalyst preparation method is analyzed.纳米半导体材料作为光催化剂在环境、能源领域具有广阔的应用前景。光催化剂的制备过程对催化剂的晶体结构有重要的影响,从而影响其光催化活性。本文较系统地综述了国内外对光催化剂纳米粉体制备的研究进展,包括固相法、气相法和湿化学法。对比分析了各种制备技术的优缺点,并对今后的研究方向和应用前景进行了分析。link_to_subscribed_fulltextpublished_or_final_versio

Template-free synthesis of hierarchical porous SnO2

Hierarchical porous tin dioxide has been successfully prepared through a fast one-pot template-free synthesis route. The boiling of the mixture of alcohol and glycerol can be utilized to generate nanopores in the SnO 2 monolith. Polycrystalline hierarchical SnO2 with well proportioned composition has also been obtained in the pore walls of tin dioxide. © 2009 Springer Science+Business Media, LLC.published_or_final_versionSpringer Open Choice, 01 Dec 201

Progress of dye-sensitized water-splitting for hydrogen production

The mechanism of dye-sensitized water-splitting for hydrogen production is introduced. Research works on the use of different dye molecules and redox mediators are reviewed. It is found that the light absorption characteristics of dye molecules, excited dye potential level, the relative position of semiconductor conduction band, the adsorption of dye molecules on the surface of semiconductor, as well as the bonding between dye molecules and semiconductor, determine the photon absorption and electron injecti...介绍了染料敏化分解水制氢的基本原理。综述了染料分子的选取,使用氧化还原调节剂的机理和研究进展。指出染料分子对光谱的吸收特性,激发态染料分子能级与半导体导带的相对位置,染料分子与半导体的吸附情况,表面键合强度直接影响对光子的吸收,电子的注入,从而影响产氢量。此外,I-/I3-作为氧化还原调节剂可有效还原染料分子,实现持续产氢。最后提出了染料敏化分解水制氢的间歇式反应器结构,以及通过选择用于敏化的半导体来提高产氢率的思路。published_or_final_versio

Micro-wind turbine system in urban environment

Wind power is identified to be of great potential for extensive development in many countries to reduce the fossil fuel based power generation. Conventional three blades wind turbines are commonly used in locations with high wind energy density, while small wind turbines are developed for less windy locations such as urban areas and flat lands. An innovative micro wind turbine was developed to generate power in urban environment where wind speed is usually low. Differing from the traditional wind turbine that can be connected directly to the grid, this system is linked to a small generator and batteries, and mainly used for local applications. The advantage of the micro wind turbine is that, apart from its low cost, it can be propelled by a very low wind speed. Computation fluid dynamics (CFD) simulations have been conducted to help evaluate the performance of a single micro wind turbine.published_or_final_versio

為城市環境設計之微型風力發電機系統

風力發電擁有巨大潛力，可廣泛在許多國家發展以減少化石燃料之使用。傳統的三葉片風力發電機常用於風能密度高的地方，小型風力發電機則專為風量低的地點而設計，例如市區及面積較小的平地等。本項研究專為風速通常較低的都市環境開發一部創新的微型風力發電機。傳統的風力發電機可直接連接到輸電網，這個系統則可連接到小型發電機和蓄電池並主要在設置系统的地方使用。微型風力發電機的優點包括低成本和低切入風速，並可靈活調節大小。這項研究進行了計算流體動力學（CFD）的模擬分析和實驗，以幫助評估設有不同配置的個別微型風力發電機的性能，以及多個微型風力發電機系統的發電特性。關鍵詞：發電，空氣動力學，功率係數。published_or_final_versio

In situ photogalvanic acceleration of optofluidic kinetics: a new paradigm for advanced photocatalytic technologies

A multiscale-designed optofluidic reactor is demonstrated in this work, featuring an overall reaction rate constant of 1.32 s¯¹ for photocatalytic decolourization of methylene blue, which is an order of magnitude higher as compared to literature records. A novel performance-enhancement mechanism of microscale in situ photogalvanic acceleration was found to be the main reason for the superior optofluidic performance in the photocatalytic degradation of dyes as a model reaction

Pathway analysis of complex diseases for GWAS, extending to consider rare variants, multi-omics and interactions

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Modeling of parasitic hydrogen evolution effects in an aluminum - air cell

2010-2011 > Academic research: refereed > Publication in refereed journalAccepted ManuscriptPublishe

Feasibility study of robotic hypofractionated lung radiotherapy by individualized internal target volume and XSight Spine Tracking: A preliminary dosimetric evaluation

published_or_final_versio

Chemical and transport behaviors in a microfluidic reformer with catalytic-support membrane for efficient hydrogen production and purification

2011-2012 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishe