In the current work, graphene oxide nanocomposites containing silver and gold nanoparticles i.e., Ag-GO and Au-GO, were formed by reducing Ag⁺ and Au⁺ cations with black tea extract. The precise reduction of precursors is facilitated by the water-soluble, highly reactive reducing agent referred as tea polyphenols. To confirm the morphological, structural, and optical properties of the synthesized GO, Ag-GO and Au-GO samples, energy-dispersive X-ray spectroscopy (EDAX), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Raman spectroscopy and UV–Vis spectroscopy are carried out. The accumulation of Ag and Au NPs on the surface of graphene oxide is observed by scanning electron microscopy. Measurements of the current–voltage (I-V) and transient photocurrent (I-t) at illumination intensities of 5 mW/cm² by varying bias voltage in the range of 10–30 V with different wavelengths are examined. A bias voltage of 30 V and a monochromatic light of wavelength (480 nm) having intensity of 5 mW/cm² at room temperature provided detectivities for Ag-GO and Au-GO nanocomposites of 4.96 × 10⁸ (Jones) and 0.75 × 10⁸ (Jones), respectively. According to the analysed photoresponse properties, Ag-GO and Au-GO nanocomposites have shown the potential for use in future optoelectronic device applications.

^{在目前的工作中，通过还原 Ag +}和 Au + 形成含有银和金纳米粒子的氧化石墨烯纳米复合材料，即 Ag-GO 和 Au - ^GO阳离子与红茶提取物。称为茶多酚的水溶性高反应性还原剂促进了前体的精确还原。为了确认合成的 GO、Ag-GO 和 Au-GO 样品的形态、结构和光学特性，能量色散 X 射线光谱 (EDAX)、X 射线光电子能谱 (XPS)、X 射线衍射 (XRD) ), 进行了拉曼光谱和紫外-可见光谱。通过扫描电子显微镜观察 Ag 和 Au NPs 在氧化石墨烯表面的积累。^{在 5 mW/cm 2}的光照强度下测量电流-电压 (IV) 和瞬态光电流 (It)通过在 10-30 V 范围内改变不同波长的偏压来检查。室温下 30 V 的偏置电压和波长 (480 nm) 强度为 5 mW/cm ²的单色光为 Ag-GO 和 Au-GO 纳米复合材料提供了 4.96 ×  10 ⁸ (琼斯) 和 0.75  ×  10 ⁸（琼斯），分别。根据分析的光响应特性，Ag-GO 和 Au-GO 纳米复合材料显示出在未来光电器件应用中的潜力。