Colletotrichum gloeosporioides (endophytic fungi) mediated biosynthesis of TiO2 nanoparticles for high-performance dye-sensitized solar cell

Next Nanotechnology Pub Date : 2025-01-01 Epub Date: 2024-12-18 DOI:10.1016/j.nxnano.2024.100122

Sakshi Singh , Shubham Sharma , Rajnish Bharti , Ravindra Nath Kharwar , Pankaj Srivastava

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Abstract

This work reports an environmentally friendly protocol for synthesizing TiO₂ nanoparticles (NPs) by utilizing endophytic fungi, Colletotrichum gloeosporioides (C. gloeosporioides). The fungi isolated from Thevetia peruviana, worked as a bio-capping agent to regulate the growing TiO₂ NPs morphology and agglomeration behavior. The formation of TiO₂ NPs was validated by surface plasmon resonance, observed using UV–vis spectroscopy. Using XRD and HRTEM, the structure, size, and shape of the as-synthesized anatase TiO₂ NPs were characterized. BET analysis was used to examine the surface area and porosity. EIS revealed the greater charge collection efficiency and enhanced electron lifetime for the TiO₂ obtained with N-3 (endophytic fungal extract). The dye-sensitized solar cell (DSSC) fabricated with bio-capped TiO₂ (N-3) photoanode exhibited greater light-to-current conversion efficiency, 3.50 %; much enhanced compared to 0.98 % obtained with un-capped TiO₂ NPs (N-1) based cell. The study demonstrated that the endophytic fungus C.gloeosporioides played a vital role in enhancing the cell performance.

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内生真菌介导的高性能染料敏化太阳能电池TiO2纳米颗粒的生物合成

本文报道了一种利用内生真菌炭疽菌（Colletotrichum gloeosporioides， C. gloeosporioides）合成TiO2纳米颗粒（NPs）的环境友好型方案。从紫竹中分离的真菌作为生物封盖剂，调控TiO2 NPs的生长形态和团聚行为。通过表面等离子体共振验证了TiO2纳米粒子的形成，并利用紫外可见光谱进行了观察。利用XRD和HRTEM对合成的锐钛矿型TiO2纳米粒子的结构、尺寸和形状进行了表征。使用BET分析来检查表面积和孔隙率。EIS显示，用内生真菌提取物N-3制备的TiO2具有更高的电荷收集效率和更长的电子寿命。采用生物包盖TiO2 （N-3）光阳极制备的染料敏化太阳能电池（DSSC）具有较高的光电流转换效率，达到3.50 %；与未封顶的TiO2 NPs （N-1）基电池相比，提高了0.98 %。研究表明，内生真菌C.gloeosporioides在提高细胞性能方面发挥了重要作用。

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Next Nanotechnology

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