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首页> 外文期刊>Journal of nano research >Nanocomposite Synthesis from a Natural Clay-Rich Soils and Exhausted Coffee Grounds for Environmental Applications
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Nanocomposite Synthesis from a Natural Clay-Rich Soils and Exhausted Coffee Grounds for Environmental Applications

机译：纳米复合物合成从天然粘土的污垢和耗尽的咖啡覆盖物用于环境应用

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Natural clays, engineered Ag-nanoparticles (NP), TiO2-NP, and exhausted coffee grounds were used to synthesize a nanocomposite 7NC using a Vertisol soil through a single-step by thermal method, to build a nanomaterial to degrade or filtrate pollutants from soils, water or air. The surface characteristics and the porosity of the composite were studied through nitrogen gas adsorption at liquid nitrogen temperature and application of the Brunauer-Emmett-Teller (BET) equation and the results indicated that the microporous composites ranged a surface area of 17.36 m(2) g(-1). X-ray diffraction showed crystalline structure and crystalline phase of the nanocomposites. HR-TEMSTEM results demonstrated that TiO2-NP surrounded Ag-NP, and both were impregnated on natural soil nanoparticles. Oxidation states of the Ag-NP and TiO2-NP were analyzed by X-ray photoelectron spectroscopy (XPS) The energy gap of nanocomposite 7NC was determined using the KubelkaMunck model from Ultraviolet-visible diffuse reflectance (UV-Visible DRS) spectra. The photocatalytic activity of these nanocomposites was evaluated, and the results indicated that nanocomposite with Vertisol-soil-NP (7NC) degraded the harmful organic compound methylene blue (MB) while the antimicrobial activity and resistance against Escherichia coli and Staphylococcus aureus and the zone of inhibition (ZOI) also were analyzed. The nanocomposites Ag-NP/TiO2NPatural-soil-NP/exhausted coffee-ground showed its for the development of an efficient material for environmental remediation with photocatalytic and antimicrobial activity.
机译：使用天然粘土，工程酰基纳米颗粒（NP），TiO2-NP和耗尽的咖啡液，通过热法通过单步通过转溶胶土壤合成纳米复合材料7nc，以构建纳米材料以降解或滤液来自土壤的污染物，水或空气。通过在液氮温度下的氮气吸附和Brunauer-Emmett-exers（Bet）方程的氮气吸附来研究复合材料的表面特性和孔隙率，结果表明微孔复合材料的表面积为17.36米（2） g（-1）。 X射线衍射显示纳米复合材料的晶体结构和结晶相。 HR-Temstem结果证明TiO2-NP包围Ag-NP，两者均浸渍在天然土纳米粒子上。通过X射线光电子能谱（XPS）分析Ag-NP和TiO2-NP的氧化状态（XPS），使用来自紫外 - 可见漫反射率（UV可见DRS）光谱的Kubelkamunck模型测定纳米复合材料7nC的能隙。评价这些纳米复合材料的光催化活性，结果表明，纳米复合材料具有转溶胶 - 土壤 - NP（7NC）降解了有害有机化合物亚甲基蓝（MB），而抗微生物活性和抗大肠杆菌和金黄色葡萄球菌和区域还分析了抑制（ZOI）。纳米复合材料Ag-NP / TiO2NP /天然土 - NP /耗尽的咖啡园显示出用于开发具有光催化和抗微生物活性的环境修复的有效材料。

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