An efficient photocatalytic composite Ni/ZnO/g-C₃N₄ (NiZG), has been successfully synthesized by coupling graphitic carbon nitride (g-C₃N₄) with nickel doped zinc oxide nanoparticles (Ni/ZnO NPs) via a cost-effective chemical co-precipitation method. This fabricated composite (NiZG) was meticulously characterized by FTIR, XRD, TEM, UV–vis spectroscopy, BET surface area, and transient photocurrent response. The catalytic efficiency of the (NiZG) composites was assessed by measuring the UV–vis absorption spectra of methylene blue and the bactericidal efficiency was checked against Gram-positive and Gram-negative microbes. The NiZG-70 composite (containing 3% Ni/ZnO and 70 % g-C₃N₄) demonstrated superior bactericidal and photocatalytic properties under solar radiations compared with Ni/ZnO, g-C₃N₄ alone. Photoluminescence analysis revealed that the electron-hole recombination in the composite was sufficiently reduced because of the Ni atoms functioning as electron transmitters at the interfaces. The recycling measurement of the composite signifies the extra stability of the NiZG and makes it a practical candidate for environmental remediation applications.

一种高效的光催化复合材料Ni / ZnO / gC ₃ N ₄（NiZG），是通过一种具有成本效益的化学方法，通过将石墨碳氮化物（gC ₃ N ₄）与掺杂镍的氧化锌纳米颗粒（Ni / ZnO NPs）偶联而成功合成的。沉淀法。这种合成的复合材料（NiZG）通过FTIR，XRD，TEM，UV-vis光谱，BET表面积和瞬态光电流响应进行了精心表征。（NiZG）复合材料的催化效率通过测量亚甲基蓝的紫外可见吸收光谱进行评估，并且针对革兰氏阳性和革兰氏阴性微生物检查了杀菌效率。NiZG-70复合材料（包含3％Ni / ZnO和70％gC ₃ N ₄）与单独使用Ni / ZnO，gC ₃ N ₄相比，在太阳辐射下具有优异的杀菌和光催化性能。光致发光分析表明，复合材料中的电子-空穴复合被充分降低，这是因为Ni原子在界面处起电子传输器的作用。复合材料的回收利用测量表明NiZG的额外稳定性，使其成为环境修复应用的实际候选者。