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碱改性铜锰尖晶石室温催化氧化空气中甲醛
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作者 Yongbiao Hua kumar vikrant +2 位作者 Ki-Hyun Kim Philippe M.Heynderickx Danil W.Boukhvalov 《Chinese Journal of Catalysis》 SCIE CAS CSCD 2024年第5期337-350,共14页
甲醛(FA)作为一种有致癌风险的有害污染物,在室内环境中普遍存在.为了高效去除甲醛,催化氧化技术成为了一种既经济又节能的选择,它不仅能降低材料成本(例如避免使用贵金属),也能在无光和室温的条件下进行.本文制备了一种成本效益高的碱... 甲醛(FA)作为一种有致癌风险的有害污染物,在室内环境中普遍存在.为了高效去除甲醛,催化氧化技术成为了一种既经济又节能的选择,它不仅能降低材料成本(例如避免使用贵金属),也能在无光和室温的条件下进行.本文制备了一种成本效益高的碱改性锰酸铜尖晶石(CuMn^(2)O_(4))催化剂,并用于甲醛催化氧化反应中.实验结果表明,采用碱(1 mol L^(-1)氢氧化钾)改性的CuMn^(2)O_(4)(1-CuMn^(2)O_(4))作为催化剂,在室温条件下,当甲醛浓度为50 ppm,气体空速为4777 h^(-1)时,甲醛转化率(XFA)达到100%;此外,在甲醛转化率为10%时,其稳态反应速率达到了8.18×10^(-2) mmol g^(-1) h^(-1).原位漫反射红外傅立叶变换光谱结果表明,在催化剂的作用下,甲醛分子经过二氧亚甲基和甲酸酯中间体的转化,最终被氧化为水和二氧化碳.进一步结合密度泛函理论模拟发现,1-CuMn^(2)O_(4)具有较高的催化氧化甲醛性能,可归因于甲醛分子更牢固地吸附在1-CuMn^(2)O_(4)表面,甲醛吸附所需的能量较低,以及最终产物从催化剂表面脱附所需的能量也较低的综合效应.本研究为在无光和室温条件下,高效去除空气中甲醛提供了新型高效、成本效益高且无需贵金属的催化剂,从而为室内空气净化提供了新的科学见解. 展开更多
关键词 甲醛 碱修饰 锰酸铜尖晶石 催化氧化 室内空气
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Nanomaterials for the abatement of cadmium (Ⅱ) ions from water/ wastewater 被引量:6
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作者 kumar vikrant Vanish kumar +1 位作者 Kowsalya Vellingiri Ki-Hyun Kim 《Nano Research》 SCIE EI CAS CSCD 2019年第7期1489-1507,共19页
The rapid rise of modern industry is the source of unchecked effluents containing many pernicious heavy metals (e.g.,cadmium).To rehabilitate the ecology,food resources,and health of humans and animals,various convent... The rapid rise of modern industry is the source of unchecked effluents containing many pernicious heavy metals (e.g.,cadmium).To rehabilitate the ecology,food resources,and health of humans and animals,various conventional methodologies are being used in wastewater treatment facilities for the abatement of cadmium.Nonetheless,the development of advanced,economical,and efficient adsorbents is needed because of the many shortcomings of conventional methods (e.g.,high cost,intensive operation,and inefficiency).Recent advancements in materials science and chemistry have introduced the use of nanomaterials,which possess very high specific surface areas and multiple functionalities,for the removal of specific targets such as cadmium.This review explores the recent developments and trends in nanomaterial adsorption technology for the mitigation of cadmium.The paper further surveys the present obstacles and future opportunities for the advancement of nanomaterial-based technologies in the area of water treatment. 展开更多
关键词 NANOMATERIALS CADMIUM adsorption pollution control WATER PURIFICATION heavy metal
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