DSpace collection: 期刊論文

Visible-light photocatalytic conversion of CO2 to methanol using dye-sensitized mesoporous photocatalysts

title: Visible-light photocatalytic conversion of CO2 to methanol using dye-sensitized mesoporous photocatalysts abstract: 摘要： Dye-sensitized TiO sub(2)/SBA-15 was prepared using a two-step route, including grafting a thin layer of TiO sub(2) onto SBA-15 and then impregnating it with 2,9-dichloro quinacridone (DCQ) molecules. The prepared material was characterized by X-ray diffraction (XRD), High-resolution transmission electron microscopy, atomic absorption spectroscopy, nitrogen sorption isotherm, Thermal gravimetric analyses, UV-Vis. The XRD patterns of SBA-15 and TiO sub(2)/SBA-15 exhibit a peek of (100), which is the characteristic of a highly ordered hexagonal structure. UV-Vis spectrum of TiO sub(2)/SBA-15 shows the band edge of 400 nm. After functionalized by DCQ, a new band between 500 and 600 nm emerges, which enables the catalyst to absorb visible light. For photocatalytic reduction of CO sub(2) into methanol in water under 100 W halide lamp illumination, DCQ-TiO sub(2)/SBA-15 exhibits superior methanol yield (0.44 mu mol g super(-1)-cat h super(-1)) than that (0.16 mu mol g super(-1)-cat h super(-1)) of DCQ-P25 TiO sub(2 出版日期： 2012-05-01 出處： Journal of environmental engineering and management, 2012-05, Vol.22 (3), p.167-172 識別號： ISSN: 1022-7636 識別號： EISSN: 1022-7636

Uniform deposition of coupled CdS and CdSe quantum dots on ZnO nanorod arrays as electrodes for photoelectrochemical solar water splitting

title: Uniform deposition of coupled CdS and CdSe quantum dots on ZnO nanorod arrays as electrodes for photoelectrochemical solar water splitting abstract: 摘要： A modified successive ionic layer adsorption and reaction (SILAR) process was used for deposition of coupled CdS and CdSe quantum dots (QDs) on the surface of orientated ZnO nanorod arrays. This solution-based process provides a conformal and homogeneous QDs deposition along the ZnO nanorod arrays with no entry clogging. The prepared multi-heterojunction CdSe/CdS/ZnO nanorod-arrayed photoanodes are highly visible-light-sensitive and show improved ion diffusion and effective suppression of electron–hole pair recombination. For photoeletrochemical solar water splitting, the photoanode prepared using the modified SILAR outperformed that using the conventional SILAR by >15% improvement in solar-to-hydrogen conversion efficiency. [Display omitted] •CdS/CdSe QDs conformally on ZNR arrays were prepared by a modified SILAR process.•Improved ion diffusion and effective suppression of e−/h+ pair recombination.•15% efficiency was increased using the photoanode with the modified SILAR process. 出版者： Elsevier Ltd 出版日期： 2015-01-21 出處： International journal of hydrogen energy, 2015-01, Vol.40 (3), p.1388-1393 資源來源： Elsevier ScienceDirect 版權： 2014 Hydrogen Energy Publications, LLC. 識別號： ISSN: 0360-3199 識別號： EISSN: 1879-3487 識別號： DOI: 10.1016/j.ijhydene.2014.11.070

Transparent free-standing film of 1-D rutile/anatase TiO2 nanorod arrays by a one-step hydrothermal process

title: Transparent free-standing film of 1-D rutile/anatase TiO2 nanorod arrays by a one-step hydrothermal process abstract: 摘要： Through the addition of a solid-state precursor, a large-scale, transparent, and free-standing film of 1-D rutile/anatase TiO 2 nanorod arrays can be fabricated by dynamically changing the acidity and concentrations of titanium and chloride ions, and creating anatase growth-friendly conditions. A large-scale, transparent, and free-standing film of 1-D rutile/anatase TiO 2 nanorod arrays can be fabricated by a one-step hydrothermal process. 出版日期： 2015-03-26 資源來源： Royal Society of Chemistry 識別號： ISSN: 1359-7345 識別號： EISSN: 1364-548X 識別號： DOI: 10.1039/c5cc00287g

The effects of prepared iron-based catalyst on the energy yield in gasification of rice straw

title: The effects of prepared iron-based catalyst on the energy yield in gasification of rice straw abstract: 摘要： This research investigated the feasibility of enhanced energy yield in gasification of rice straw by using a prepared iron-based catalyst. The prepared iron-based catalyst containing 2% (wt%) Fe2O3 was produced by wet impregnation process. Based on the results of produced gas yield, the yield amounts of combustible gases increased with an increase in the prepared iron-based catalyst addition. In the case of gasification temperature 800 °C and below, the yield amount of combustible gas increased by using the prepared iron-based catalyst. Besides, the energy yield efficiency was approximately enhanced from 8% to 74% with the iron-based catalyst addition. In the case of gasification temperature 800 °C and iron-based catalyst addition, the energy yield efficiency of combustible gases is similar with that of gasification temperature 900 °C and without catalyst addition. That is, prepared iron-based catalyst has the good potential for converting rice straw into bio-energy and for reducing the energy requirement in gasification. •The iron-based catalyst containing 2% (wt%) Fe2O3 was well-prepared by wet impregnation process.•The prepared iron-based catalyst could promote water-gas shift reaction resulted in H2/CO ratio increasing at 800 °C.•The tested iron-based catalyst has good potentials for enhancing quality of combustible gas. 出版者： Elsevier Ltd 出版日期： 2016-12-14 出處： International journal of hydrogen energy, 2016-12, Vol.41 (46), p.21747-21754 資源來源： Elsevier ScienceDirect Journals Complete 版權： 2016 Hydrogen Energy Publications LLC 識別號： ISSN: 0360-3199 識別號： EISSN: 1879-3487 識別號： DOI: 10.1016/j.ijhydene.2016.08.021