Ganji Saidulu, Kola Ramesh, Gullapelli Kumaraswamy, Martha Ramesh
Department of Chemistry, Chaitanya Bharathi Institute of Technology(A), Hyderabad, 500075, India.
Department of Physics and Chemistry, Mahatma Gandhi Institute of Technology(A), Hyderabad, 500075, India.
Discov Nano. 2025 Jan 27;20(1):16. doi: 10.1186/s11671-024-04176-5.
Because of their uniform and regular channels, adjustable pore size, large surface area, controllable wall composition, high hydrothermal stability, ease of functional modification, and good accessibility of larger reactant molecules, mesoporous siliceous SBA-15 is of excellent catalyst carrier that is highly versatile and has been used extensively to prepare a variety of supported catalysts with ideal catalytic properties. In this study, we report the synthesis, characterization, and catalytic application of Cu-Ag/ SBA-15 nanoalloy catalysts towards the control of microorganisms in drinking water has been reported. The Cu-Ag/SBA-15 nanoalloy catalysts with different molar mass ratio of copper to silver (Cu:Ag = 1: 0, 0.75: 0.25, 0.5: 0.5, 0.25: 0.75, 0: 1) keeping 1weight % total loading of copper and silver metals on SBA-15 support have been prepared by incipient wetness impregnation method and characterized by various characterization techniques like, low angle XRD, wide angle XRD, N-physcisorption and scanning electron microscopy techniques. The anti-bacterial activity of the catalysts was measured qualitatively by testing the presence of coliforms in water after contacting with the catalyst at room temperature. These nanoalloy catalysts found to be effective in controlling the microorganisms in drinking water. Among the series of the catalysts prepared, 0.25Cu-0.75Ag /SBA-15 catalyst showed superior catalytic activity. The high catalytic performance of the catalyst is due to its high surface area.
由于其通道均匀规则、孔径可调、表面积大、壁组成可控、水热稳定性高、易于功能改性以及较大反应物分子的良好可及性，介孔硅质SBA - 15是一种优异的催化剂载体，具有高度通用性，已被广泛用于制备具有理想催化性能的各种负载型催化剂。在本研究中，我们报道了Cu - Ag/SBA - 15纳米合金催化剂的合成、表征及其对饮用水中微生物控制的催化应用。通过初湿浸渍法制备了铜与银摩尔质量比不同（Cu:Ag = 1:0、0.75:0.25、0.5:0.5、0.25:0.75、0:1）且铜和银金属在SBA - 15载体上的总负载量保持为1wt%的Cu - Ag/SBA - 15纳米合金催化剂，并通过低角度XRD、广角XRD、N - 物理吸附和扫描电子显微镜技术等各种表征技术对其进行了表征。通过在室温下将催化剂与水接触后检测水中大肠菌群的存在，定性测定了催化剂的抗菌活性。发现这些纳米合金催化剂在控制饮用水中的微生物方面是有效的。在所制备的一系列催化剂中，0.25Cu - 0.75Ag /SBA - 15催化剂表现出优异的催化活性。该催化剂的高催化性能归因于其高表面积。
