The present work was aimed to develop pure and varying concentration (1, 2, 3, 5%) of Bi doped ZnO nanomaterials for photocatalytic application through a simple one pot synthesis technique. The structural, morphological, optical and photocatalytic behavior of the prepared samples were characterized using different techniques. The XRD results of the Pristine and Bi doped ZnO nanomaterials confirm that the samples exhibit hexagonal wurtzite structure of the ZnO. The crystallite size of the Bi doped ZnO samples decrease and the 5% Bi-doped ZnO sample exhibits a smaller crystallite size of 12.87 nm. The FT-RAMAN spectra show that the structural organizations of the prepared samples and also the spectra indicate the obtained vibrational modes are due to the motions of Zn²⁺ ions and O vacancies in the ZnO lattice structure. The FESEM analysis shows the prepared samples exhibits aggregated spherical form for the pristine ZnO and the size of the particles reduced upon increasing Bi concentration. The EDAX analysis confirms the presence of all synthesized compounds without any secondary phase impurities. The optical results suggests higher absorption and lesser bandgap for 5% Bi-doped ZnO sample and the spectrum is red shifted. The photocatalytic performance of the prepared Bi doped ZnO was evaluated in the decolourization reaction of methyl green aqueous solution under black light illumination. Bi doped ZnO samples exhibited high photocatalytic activity than bare ZnO. The loading % was optimized and the best performance was achieved from the sample, which contained 3 wt% of Bi. The rate constants of the decolourization reactions were calculated, and the stability of the best-performed sample was investigated.

目前的工作旨在通过简单的一锅合成技术开发用于光催化应用的纯和不同浓度（1%、2%、3%、5%）的 Bi 掺杂 ZnO 纳米材料。使用不同的技术表征所制备样品的结构、形态、光学和光催化行为。Pristine 和 Bi 掺杂的 ZnO 纳米材料的 XRD 结果证实样品表现出 ZnO 的六方纤锌矿结构。Bi 掺杂的 ZnO 样品的微晶尺寸减小，5% Bi 掺杂的 ZnO 样品的微晶尺寸更小，为 12.87 nm。FT-RAMAN 光谱表明制备的样品的结构组织以及光谱表明获得的振动模式是由于 Zn ²⁺的运动ZnO 晶格结构中的离子和 O 空位。FESEM 分析表明，制备的样品显示出原始 ZnO 的聚集球形形式，并且随着 Bi 浓度的增加，颗粒的尺寸减小。EDAX 分析证实了所有合成化合物的存在，没有任何第二相杂质。光学结果表明 5% Bi 掺杂的 ZnO 样品具有更高的吸收和更小的带隙，并且光谱发生红移。研究了制备的Bi掺杂ZnO在黑光照射下甲基绿水溶液脱色反应中的光催化性能。Bi掺杂的ZnO样品表现出比裸ZnO高的光催化活性。优化了负载百分比，并从含有 3 wt% Bi 的样品中获得了最佳性能。