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贵金属/金属-有机骨架复合材料的合成及在光催化中的应用 被引量:1
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作者 樊石艳 王映霞 《广东化工》 CAS 2021年第11期285-286,共2页
光催化技术直接利用太阳能作为光源驱动反应,是一种理想的清洁能源生产技术和环境污染治理技术。利用贵金属和金属-有机骨架进行组装得到的复合材料作为光催化剂,光生电子能够快速地在复合材料内部的迁移,可以实现高效的光生电荷分离效... 光催化技术直接利用太阳能作为光源驱动反应,是一种理想的清洁能源生产技术和环境污染治理技术。利用贵金属和金属-有机骨架进行组装得到的复合材料作为光催化剂,光生电子能够快速地在复合材料内部的迁移,可以实现高效的光生电荷分离效率,提高其光催化性能。本文主要介绍贵金属/金属有机-骨架复合材料的合成及在光催化中的应用。 展开更多
关键词 贵金属/金属-有机骨架复合材料 合成 催化制氢 催化还原二氧化碳 催化降解有机染料
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ZIF-67@PVP@Fe3O4复合材料的制备及催化性能研究
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作者 李晓柠 吴芳辉 +3 位作者 罗祥瑞 程源晟 王淼 杨世龙 《环境科学与技术》 CAS CSCD 北大核心 2019年第10期122-127,共6页
该文首先通过简单的方法制备磁性纳米材料Fe3O4,然后在PVP材料联接作用下掺杂进多孔材料ZIF-67中制备了新型ZIF-67@PVP@Fe3O4复合材料。对该复合材料进行了充分的表征后,利用多孔、比表面积大、热/机械稳定性好、结构规整、活性位点多的... 该文首先通过简单的方法制备磁性纳米材料Fe3O4,然后在PVP材料联接作用下掺杂进多孔材料ZIF-67中制备了新型ZIF-67@PVP@Fe3O4复合材料。对该复合材料进行了充分的表征后,利用多孔、比表面积大、热/机械稳定性好、结构规整、活性位点多的ZIF-67与磁性纳米材料Fe3O4所表现出的协同作用,研究了该复合材料在环境污染物对硝基苯酚还原反应中的催化作用。结果表明,在该反应体系中添加ZIF-67@PVP@Fe3O4复合材料,与未添加催化剂以及只添加单一材料相比,响应灵敏度增强,反应速率加快,表现出最大的催化活性。另外该复合材料中因为添加了磁性纳米材料Fe3O4,所以有利于催化剂的回收再利用。对ZIF-67@PVP@Fe3O4复合材料进行了6次重复循环实验,催化效率仍维持在95%以上,表明该复合材料稳定性较好,有望发展成为有应用前景的环境污染物催化材料。 展开更多
关键词 ZIF-67 PVP 复合材料 对硝基苯酚 催化有机染料
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Synthesis of nano-MoS_2/bentonite composite and its application for removal of organic dye 被引量:2
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作者 胡坤宏 赵娣芳 刘俊生 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第10期2484-2490,共7页
A nano-MoS2/bentonite composite was synthesized by calcinating MoS3 deposited on bentonite in H2. The obtained composite was characterized using thermogravimetric analysis, X-ray diffractometer, scanning electron micr... A nano-MoS2/bentonite composite was synthesized by calcinating MoS3 deposited on bentonite in H2. The obtained composite was characterized using thermogravimetric analysis, X-ray diffractometer, scanning electron microscope and transmission electron microscope. The results show that nano-MoS2 particles are distributed on the surface of bentonite and form layered structures with layer distance of about 0.64 nm. The composite presents an excellent performance for the removal of methyl orange. Some operation conditions affect the removal efficiency of methyl orange, such as dosage of composite, initial concentration of methyl orange, temperature and pH value. However, light source does not influence the removal efficiency. The removal mechanism is attributed to the adsorption of methyl orange on the nano-MoS2/bentonite composite. The adsorption of methyl orange on the composite is in accordance with the pseudo-second-order kinetic model. 展开更多
关键词 molybdenum disulfide BENTONITE NANOPARTICLES PHOTOCATALYSIS ADSORPTION organic dye
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Photocatalytic Cr(Ⅵ) reduction and organic-pollutant degradation in a stable 2D coordination polymer 被引量:8
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作者 Fu‐Xue Wang Xiao‐Hong Yi +1 位作者 Chong‐Chen Wang Ji‐Guang Deng 《Chinese Journal of Catalysis》 CSCD 北大核心 2017年第12期2141-2149,共9页
A new coordination polymer,Zn(bpy)L(BUC‐21),(H2L=cis‐1,3‐dibenzyl‐2‐imidazolidone‐4,5‐dicarboxylic acid,bpy=4,4′‐bipyridine),has been synthesized under hydrothermal conditions,and characterized by single‐cry... A new coordination polymer,Zn(bpy)L(BUC‐21),(H2L=cis‐1,3‐dibenzyl‐2‐imidazolidone‐4,5‐dicarboxylic acid,bpy=4,4′‐bipyridine),has been synthesized under hydrothermal conditions,and characterized by single‐crystal X‐ray analysis,Fourier transform infrared spectroscopy,thermogravimetric analyses,CNH elemental analysis and UV‐Vis diffuse reflectance spectroscopy.BUC‐21exhibited an excellent performance for photocatalytic Cr(VI)reduction with a conversion efficiency of96%,better than that of commercial P25(39%),under UV light irradiation for30min.BUC‐21could also be used to conduct photocatalytic degradation of organic dyes including methylene blue,rhodamine B,methyl orange and reactive red X‐3B.Also,the photocatalytic activity of BUC‐21remained high across a wide pH range from2.0to12.0.It is interesting to note,however,that BUC‐21was unable to achieve simultaneous reduction of Cr(VI)and degradation of an organic pollutant in a mixed matrix,which can be attributed to the competition between Cr(VI)and the organic dyes for access to the photo‐excited electrons. 展开更多
关键词 PHOTOCATALYSIS Cr(VI) reduction Organic dyes Coordination polymers Degradation
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