【作者】 王帆； 吴秀明； 张旭红； 张欣； 于海涛；

【Author】 Fan Wang;Xiuming Wu;Xuhong Zhang;Xin Zhang;Haitao Yu;College of Chemistry and Materials Science,Hebei Normal University;

【机构】 河北师范大学化学与材料科学学院；

【摘要】 当今社会,半导体光催化技术受到越来越广泛的关注,在降解有机污染物、光催化制氢和光催化还原二氧化碳等领域均有广泛应用。然而,已有的光催化材料普遍存在太阳能利用率不高、量子效率偏低等问题。因此,开发稳定、高效、低成本的可见光响应的半导体光催化材料具有非常重要的意义。本项工作中,我们合成了具有可见光响应的有机/无机复合材料的光催化剂。异质结构的形成可以使其光生电子和空穴对有效分离,提高其结构稳定性和光催化活性。同时,此异质结构光催化剂还结合了聚酰亚胺类有机聚合物材料的原料来源丰富、价格低廉、制备工艺简单、且便于分子设计等优势。通过XRD、BET、SEM和紫外等技术表征了制备的样品。研究表明,复合材料对于罗丹明B的降解显示出更高的光催化活性。最佳质量比时,光催化剂的活性是单独有机组分的11.3倍,是单独无机组分的1.4倍。复合光催化剂对阳离子型染料(罗丹明B、亚甲基蓝)及阴离子型染料(甲基橙)都具有较好的光催化降解活性和稳定性。我们还对此类有机/无机复复合半导体光催化剂的光催化机理开展了研究。更多还原

【Abstract】 Solar power, which possesses enormous potential as a clean, abundant and economical energy, may be the most optimal solution to over come the hard problem of energy shortage. In order to take advantage of solar energy fully and efficiently, great efforts have been made in the past decades, especially in photocatalytic field. Photocatalysis is one of effective methods for utilization of solar energy, including environmental remediation, photocatalytic hydrogen production and photocatalytic degradation of organic fuels et al. A visible-light drivenOrganic/inorganic composite materials was prepared.The products were characterized by X-ray diffraction, Brunauer–Emmett–Teller analysis, transmission electron microscopy, and ultraviolet–visible diffuse reflectance spectroscopy. The composites showed high efficiency for the degradation of Rhodamine B(Rh B) under visible light. The optimum photocatalytic activity of with best molar ratio under visible light irradiation was almost 11.3and 1.4 times as high as those of the pure organics and inorganics respectively.更多还原