Abstract：
This study develops environmentally benign capping technique to synthesize nanoparticles of Curcuma longa-coated titanium dioxide (CR-TiO2) from titanium isopropoxide by utilizing the extract of Rosa rubiginosa flowers as reducing and chelating agent. The biogenically synthesized nanoparticles revealed excellent anti-bacterial, electrochemical, and photocatalytic properties due to the presence of porous TiO2 nanostructures. The sharp peaks by XRD pattern showed the crystallinity and phase purity of TiO2 nanoparticles. BET analysis proved mesoporous nature of the materials with specific surface area of 134 m2 g -1. The vibrational spectra suggest hydroxyl groups from flavonoids of Curcuma longa acting as functionalizing agent for TiO2 nanoporous structures with visible luminescence, which is proven in fluorescence spectra and is applicable for photocatalytic studies. The anti-bacterial studies showed good inference on TiO2 nanoparticles against Pseudomonas auruginosa and proved it to be an excellent antipseudomonal agent with the oxidative potential. The maximum degradation of phenol red dye in the presence of TiO2 under visible light conditions was observed. The supercapacitor fabricated using the biogenic TiO2 three-electrode system exhibited a specific capacitance of 128 Fg-1 (10 mV s-1), suggesting it as an excellent electrode material. The LSV curve at 50 mV s-1 scan rate showed that oxygen reduction potential (ORR) of CR-TiO2 electrodes was 121 mV. The present study is a new application of nanoparticles in sustainability consideration of the environment as well as a solution to the power crisis with fewer limitations. The well-distinguished antidiabetic and BSA denaturation potential suggests that these porous TiO2 nanostructures can be useful for drug delivery as glucose inhibitors and oral anti-inflammatory drugs with the restriction of adverse side effects.
摘要：
这项研究开发了环境友好的封端技术，通过利用罗莎rubiginosa花的提取物作为还原剂和螯合剂，从异丙醇钛合成姜黄涂层二氧化钛（CR-TiO2）的纳米颗粒。生物合成的纳米粒子显示出优异的抗菌，电化学,和光催化性能由于多孔TiO2纳米结构的存在。XRD图谱显示了TiO2纳米颗粒的结晶度和相纯度。BET分析证明了材料的中孔性质，比表面积为134m2g-1。振动光谱表明，姜黄的类黄酮中的羟基可作为具有可见发光的TiO2纳米多孔结构的官能化试剂，这在荧光光谱中得到了证明，适用于光催化研究。抗菌研究表明，TiO2纳米颗粒对铜绿假单胞菌具有良好的推论，并证明它是一种具有氧化电位的优异的抗假单胞菌剂。在可见光条件下，在TiO2存在下观察到酚红染料的最大降解。使用生物TiO2三电极系统制造的超级电容器表现出128Fg-1（10mVs-1）的比电容，表明它是一种优秀的电极材料。在50mVs-1扫描速率下的LSV曲线表明,CR-TiO2电极的氧还原电位(ORR)为121mV。本研究是纳米粒子在环境可持续性考虑中的新应用，也是解决能源危机的局限性较少。良好区分的抗糖尿病和BSA变性潜力表明，这些多孔TiO2纳米结构可用于作为葡萄糖抑制剂和口服抗炎药的药物递送，并限制不良副作用。
