Karthika Viswanathan, Arumugam Ayyakannu
Department of Nanoscience and Technology, Alagappa University, Karaikudi 630 003, Tamil Nadu, India.
Department of Botany, Alagappa University, Karaikudi 630 003, Tamil Nadu, India.
IET Nanobiotechnol. 2017 Feb;11(1):113-118. doi: 10.1049/iet-nbt.2016.0072.
A novel combination of titanium oxide (TiO)/gold (Au)/multiwalled carbon nanotubes (MWCNTs) nanocomposite (NC) was synthesised by sol- gel method. MWCNT functionalisation by modified Hummers method. TiO/Au nanoparticles (NPs) were synthesised by biological method using bark extract. MWCNT/TiO/Au NC samples were characterised by X-ray diffraction, ultraviolet-visible-diffuse reflectance spectra, microRaman, scanning electron microscopy and high-resolution-transmission electron microscopy analyses. The photocatalytic performance of the obtained for NC toward the decomposition of congo-red and the antimicrobial activity for inhibition of Gram positive ( and ), Gram negative ( and ) and fungal strains have been evaluated and the results are compared with positive control ampicillin. The metal and metal-oxide NPs have a lower sorption capacity. The herbicidal bond to the tested CNTs by the combination of electron donor-acceptor interactions and hydrogen bonds. In particular, the dispersion of NC and control of sodium borohydride, it has more efficient effect on the photodegradation and antibacterial activity of positive control of ampicillin. The NC material has exhibited maximum photodegradation and antibacterial activity results of zone of inhibition when compared with control samples.
通过溶胶-凝胶法合成了一种新型的氧化钛（TiO）/金（Au）/多壁碳纳米管（MWCNTs）纳米复合材料（NC）。采用改进的Hummers法对MWCNT进行功能化处理。利用树皮提取物通过生物方法合成TiO/Au纳米颗粒（NPs）。通过X射线衍射、紫外-可见-漫反射光谱、显微拉曼光谱、扫描电子显微镜和高分辨率透射电子显微镜分析对MWCNT/TiO/Au NC样品进行了表征。评估了所得NC对刚果红分解的光催化性能以及对革兰氏阳性菌（和）、革兰氏阴性菌（和）和真菌菌株的抗菌活性，并将结果与阳性对照氨苄青霉素进行了比较。金属和金属氧化物纳米颗粒的吸附能力较低。除草剂通过电子供体-受体相互作用和氢键的组合与测试的碳纳米管结合。特别是，NC的分散以及硼氢化钠的控制，对氨苄青霉素阳性对照的光降解和抗菌活性具有更有效的作用。与对照样品相比，NC材料在光降解和抑菌圈抗菌活性方面表现出最大的结果。
