A hydrothermal method was used to prepare a lozence shape like (NH₄)₂V₆O₁₆ photocatalyst to split water into hydrogen. The energy gap of the (NH₄)₂V₆O₁₆ is about 2.7ev and the absorption wavelength is about 350–800 nm. In order to modify and enhance the photocatalytic reactivity of the (NH₄)₂V₆O₁₆, a graphitic carbon nitride (g-C₃N₄) possessing higher of lone pairs that can excite electron to combine with H⁺ and decrease electron-electronic hole recombination was added into the lozence shape like (NH₄)₂V₆O₁₆ to form a composite material. Thus, the synsthesis of the lozence shape like (NH₄)₂V₆O₁₆/g-C₃N₄ photocatalysts were controlled by the pH value, hydrothermal temperature, and the g-C₃N₄ concentration. For the photocatalytic reactivity of catalysts, a self-assemble reactor equipped with GC-TCD is used to analyze the water splitting efficiency. The optimum conditions to synthesize pure (NH₄)₂V₆O₁₆ are the acidic environment of pH = 3, the hydrothermal temperature of 200 °C, and the hydrothermal time of 4 h. The optimum concentration of g-C₃N₄ in the (NH₄)₂V₆O₁₆/g-C₃N₄ composite is 14 wt% and the accumulative concentration of hydrogen production reaches to the highest value of 2300 μmol/g cat.

使用水热法制备像（NH ₄）₂ V ₆ O ₁₆这样的光亮形状的光催化剂，将水分解成氢。（NH ₄）₂ V ₆ O ₁₆的能隙约为2.7ev，吸收波长约为350-800 nm。为了修饰和增强（NH ₄）₂ V ₆ O ₁₆的光催化反应性，具有更高孤对对能激发电子与H ⁺结合的石墨氮化碳（gC ₃ N ₄）。将减少的电子-电子空穴复合添加到像（NH ₄）₂ V ₆ O ₁₆这样的惰性形状中以形成复合材料。因此，通过pH值，水热温度和gC ₃ N _4的浓度来控制像（NH ₄）₂ V ₆ O ₁₆ / gC ₃ N ₄的光亮形状的合成。对于催化剂的光催化反应性，使用配有GC-TCD的自组装反应器来分析水分解效率。合成纯（NH ₄）₂的最佳条件V ₆ O ₁₆是pH = 3的酸性环境，200°C的水热温度和4 h的水热时间。（NH ₄）₂ V ₆ O ₁₆ / gC ₃ N ₄复合物中gC ₃ N ₄的最佳浓度为14 wt％，产氢的累积浓度达到最高值2300μmol/ g cat。