Photoelectrochemical (PEC) water splitting is the latest technology to produce hydrogen and electricity by using sunlight. The low bandgap of tungsten oxide (WO₃) enables it as a suitable candidate for PEC water splitting. Reduced graphene oxide (rGO) is a material having extra thin sheets and a very large surface area with extreme conductivity. Graphene oxide (GO) has been synthesized by using a modified Hummer’s method. Hydrothermal reduction of GO gives rGO. WO₃–graphene composites of different ratios have been prepared hydrothermally and then coated on indium tin oxide coated glass to make electrodes for water splitting. Various characterization techniques such as UV–visible spectroscopy, diffusion reflectance spectroscopy, X-ray diffraction, scanning electron microscopy, and linear sweep voltammetry (LSV) were used to study the absorbance/reflectance, structure, morphology, and optical/electrical properties of prepared nanostructures. In addition, WO₃ particles were distributed on the strong sheets of rGO randomly. The IV-measurements were taken of rGO/WO₃ electrodes under dark environment (very minor current ~ 250 nA) by using LSV. The electrodes exhibit maximum ~ 450 μA under dark environment, while photocurrent initiates from 1.0 mA to 3.2 mA under artificial sunlight. That is convincingly an exceptional result in the field of PEC cell.

光电化学（PEC）分解水是利用日光产生氢和电的最新技术。氧化钨（WO ₃）的低带隙使其成为PEC水分解的合适候选物。还原氧化石墨烯（rGO）是一种具有超薄薄片和非常大的表面积且具有极高电导率的材料。氧化石墨烯（GO）已通过使用改良的Hummer方法合成。GO的水热还原得到rGO。WO ₃水热制备了不同比例的–石墨烯复合材料，然后将其涂覆在氧化铟锡涂层的玻璃上，制成用于水分解的电极。各种表征技术，例如紫外-可见光谱，扩散反射光谱，X射线衍射，扫描电子显微镜和线性扫描伏安法（LSV），用于研究所制备食品的吸光度/反射率，结构，形态和光学/电学性质。纳米结构。此外，WO ₃颗粒随机分布在rGO的坚固薄片上。IV测量是根据rGO / WO _3进行的LSV在黑暗环境中（极小电流〜250 nA）放置电极。电极在黑暗环境下最大显示〜450μA，而在人工阳光下光电流从1.0 mA引发到3.2 mA。令人信服的是，这是PEC电池领域的杰出成果。