共查询到19条相似文献,搜索用时 78 毫秒
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不同制备条件对光催化剂TiO2活性的影响 总被引:8,自引:0,他引:8
本文研究了TiO2在不同制备条件下对其光催化活性的影响。结果表明,除制备方法外,加热温度和加热时间是影响TiO2光催化活性最主要的因素;而当两种不同晶型的锐钛矿型TiO2与金红石型TiO2以一定的比例共存时其光催化活性较好。 相似文献
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光催化还原二氧化碳为碳氢燃料,不仅可以减少大气中的二氧化碳含量,解决温室效应带来的环境问题,而且可以提供能源燃料,具有可观的经济效应。综述了光催化还原二氧化碳的研究进展,介绍了目前常见的一些光催化材料,比较了各种材料的特点。最后对光催化二氧化碳的研究进行了展望。 相似文献
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光催化氧化法处理污水的研究 总被引:4,自引:0,他引:4
论述了光催化氧化的反应机理,介绍了TiO2光催化剂在环境保护上的应用现状,讨论了半导体催化剂的选择,光催化剂的固定以及反应器的设计和操作参数的确定几个方面的影响因素,指出了目前研究的状况和今后的研究方向。 相似文献
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Edoardo Magnone Min-Kwang Kim Hong Joo Lee Jung Hoon Park 《Ceramics International》2019,45(3):3359-3367
α-Al2O3 hollow fibers (AlHF)-supported TiO2 photocatalysts were prepared by a single dip-coating process. In order to tentatively improve the adhesion strength of TiO2 photocatalysts on the surface of microstructured AlHFs, the use of an adhesion promoter as a Silica-based binder (SBB) was further studied. TiO2 powders, as well as AlHF-supported TiO2 and SBB AlHF-supported TiO2 photocatalysts, were investigated for the photodegradation of the Methylene Blue (MB) under UV irradiation. MB was selected as a model of organic pollutant. AlHF-supported TiO2 photocatalysts show higher photo-catalytic activity than TiO2 powders. Best performance was achieved with an SBB AlHF-supported TiO2 photocatalysts, whereby a degradation ratio of about 65% was obtained. 相似文献
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介绍了氯氧化铋光催化剂在国内专利申请中的发展情况,重点分析了氯氧化铋光催化剂的改性方式以及应用的专利分布,并对国内氯氧化铋合成改性相关的专利技术演进和技术热点进行了系统地分析和探讨,为氯氧化铋光催化剂相关技术领域的进一步研究提供参考和借鉴,并且为国内大专院校和企业的专利申请方向和布局提供思路和建议。 相似文献
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有机光催化剂结构多样、光催化机制迥异,且太阳光谱吸收宽泛,可有效提高太阳能的转换效率,因此被逐渐地应用于可见光催化分解水体或空气中的污染物。着重介绍了有机光催化剂的结构特性,光催化机制及其在光催化领域中的形态发展。 相似文献
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Aqueous dispersion containing TiO2 particles was firstly prepared and then mixed with silicone or acrylic additives to establish a treating bath. And the fibrous TiO2 photocatalysts were produced by padding three woven fabrics including cotton, polyester and flax fabrics as support materials with this treating bath and some factors affecting the preparation process were discussed. Moreover, the fibrous TiO2 photocatalysts were characterized by X-ray diffractometer, infrared Fourier transform spectrometer and scanning electron microscope, and evaluated with respect to the removal efficiency of ammonia under UV irradiation in air stream by a specifically designed photocatalytic reactor and environmental condition simulated chamber. The results showed that ammonia gas could well be decomposed by the fibrous TiO2 photocatalysts based on cotton and flax fabrics. Increasing the dosage of TiO2 aqueous dispersion led to the improved ammonia decomposition level of the fibrous TiO2 photocatalysts. The additives caused the reduced ammonia decomposition level of the fibrous TiO2 photocatalysts, but provided it with the enhanced resistance to water washing. The ammonia photocatalysis of the fibrous TiO2 photocatalysts was not much affected by curing temperature and dyed cotton fabrics when preparing. 相似文献
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太阳能光解水制氢催化剂研究进展 总被引:1,自引:0,他引:1
介绍了直接利用太阳能光解水制氢的几种新型光催化剂:钽酸盐、铌酸盐、钛酸盐、多元硫化物,阐述了提高光催化剂反应活性的途径:光催化剂纳米化、离子掺杂、半导体复合、染料光敏化、贵金属沉积、电子捕获剂、表面螯合及衍生作用、外场耦合。展望了该领域未来的研究方向。 相似文献