Sunlight mediated photo-degradation and anti-bacterial activity of hetero junctioned plasmonic binary (Au/ZnO, RGO/ZnO) and ternary (RGO/Au/ZnO) nanocomposites (NC) have been reported. Higher photo-charge carrier generation, increased charge separation, improved active sites for catalysis, enhanced LSPR and larger photo-response regions have been achieved. Decoration with Au nanoparticles (ca. 11±3 and 48±5nm) and RGO of ZnO (3D/1D) microstructures (aspect ratio 15.18) provides ternary NCs an edge over mono/bi component catalysts. The ternary NC have shown improved dye degradation capacity with 100 % efficiency (5 µM MB solution) and average adsorption degradation capacity (Q°) of 83.34mg/g within 30 min of sunlight exposure (900±30Wm^-2). Elaborated studies by varying reaction parameters like initial dye concentration, contact time, type of NCs and initial loading of NCs reveals pseudo first order degradation kinetics. 100% microbial killing of Gram positive S.aureus strain with 60µg/ml of NC using sunlight as activator has proven the simultaneous multiple functionality of the NC. Further, facile green one pot hydrothermal synthesis with water as reaction medium, absence of photo-corrosion of NCs, regeneration ability (ca. 90% for 10µM solution) of NCs, projects a broader potential application of the synthesized NCs and could reduce the continuous requirement of such material, limiting the environmental toxicity.

已经报道了阳光介导的杂结等离子体二元（Au / ZnO，RGO / ZnO）和三元（RGO / Au / ZnO）纳米复合材料（NC）的光降解和抗菌活性。已经实现了更高的光电荷载流子产生，增加的电荷分离，改进的催化活性位点，增强的LSPR和更大的光响应区域。用Au纳米颗粒（约11±3和48±5nm）和ZnO微结构的RGO（长宽比为15.18）进行装饰，使三元NC比单/双组分催化剂更具优势。三元NC显示出改善的染料降解能力，效率为100％（5 µM MB溶液），在日光照射后30分钟内（900±30Wm ^-2）平均吸附降解能力（Q°）为83.34mg / g）。通过改变反应参数（如初始染料浓度，接触时间，NC的类型和NC的初始加载量）进行的详尽研究揭示了伪一级降解动力学。使用阳光作为激活剂，用60µg / ml的NC可以100％杀灭革兰氏阳性金黄色葡萄球菌，证明了NC具有多种同时功能。此外，以水为反应介质的绿色简易一锅水热合成方法，不存在NCs的光腐蚀，NCs的再生能力（对于10µM溶液约为90％），显示了合成NCs的广泛应用前景，并可能减少连续使用这种材料的要求，限制了环境毒性。