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首先利用氧化石墨烯(GO)改性TiO2,然后以碳酸钙-碳酸钠为造孔剂,通过海藻酸钙(CA)固载TiO2/GO制备CA/TiO2/GO凝胶微球,最后该微球经抗坏血酸水浴还原GO,获得可漂浮CA/TiO2/RGO微球作光催剂;并采用FT-IR、XRD、SEM、UV-Vis DRS以及TGA等测试手段对CA/TiO2/RGO形貌及结构进行表征分析,初步探究CA/TiO2/RGO对氨基黑10B降解性能和机理。结果表明:于30 mg/L氨基黑10B染料溶液中,投加CA/TiO2/RGO光催剂浓度为1.84 g/L,220 min内CA/TiO2/RGO对氨基黑10B的降解率可达80%,降解过程符合一级反应动力学模型,其光催化降解的主要活性物种是·O2-,而·OH和h+在本降解中起到作用相对较小。 相似文献
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Over the range of pH 5—10.8, CCGCV showed the same spectrum which was affected only slightly by the variation in the salt concentration. The CD of the free coat protein and free RNA of this virus has also been measured, Results showed that the contribution of the protein component to the far UV CD spectrum of CCGCV was dominant. The near UV CD spectrum may be indicative of a strong intravirus interaction of the RNA with the coat protein.When irradiated with 234 or 221 nm light, CCGCV in saline over the range of pit 3.1—4.8 showed an unusual change in the ellipticities at the corresponding wavelengths. The CD spectrum of CCGCV after irradiation showed two strong positive peaks at 230—231nm and around 205 nm. The mechanism of producing this phenomenon is discussed. 相似文献
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本文证明在pH 5—10.8的范围里,CCGCV的生理盐水溶液呈相同的CD谱。溶液中不同盐浓度对此病毒的CD谱没有明显影响。也测定了此病毒的游离外壳蛋白质和游离核酸的CD谱。实验结果说明CCGCV的远紫外CD谱几乎完全由蛋白质组份贡献。近紫外CD谱可能说明病毒颗粒内RNA和蛋白质问有很强的相互作用。在234或221毫微米光照下,pH 3.1—4.8时的CCGCV生理盐水溶液在相应波长处的椭圆值呈现一种不寻常的变化。光照后的病毒的CD谱在231—230毫微米和205毫微米附近各呈现一个强正峰。讨论了产生此种现象的机制。 相似文献
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