A straightforward, high-yield route was followed to produce visible light active BiVO₄ (BV)-based catalysts through the novel, green approaches: metathesis and metathesis-assisted molten salts. The catalysts prepared at room temperature (RT-BV) and 350 °C for 12 h (BV350/12) exhibited spherical-like and highly crystalline plate-like particles, respectively. A novel BV catalyst was prepared by adding graphite oxide, GO/BV. The synthesis conditions affected crystallite size, crystallinity, optical edge, energy gap, specific area characteristics, and photocatalytic activity. GO/BV achieved 100% rhodamine B (RhB) degradation irradiated (300 min) with low-power blue LEDs. The initial reaction rate (-r₀) of RhB using the GO/BV was 4.57, 3.42 and 1.31-fold faster than RT-BV, BV350/12, and BV350/2. Catalyst dosage and RhB initial concentration on the photoactivity of GO/BV were analyzed. Trapping experiments established that holes and hydroxyl radicals are the main oxidative species causing RhB degradation, and the mechanism was postulated based on GO/BV. Reusability tests confirmed GO/BV chemical stability. GO/BV reached 74% photodegradation of methylene blue (MB). The photodegradation of the RhB + MB mixture using GO/BV showed that the coexistence of MB diminished the RhB degradation to 86%.

通过新的绿色方法：复分解和复分解辅助熔盐，遵循了一条简单、高产的路线来生产基于可见光活性的 BiVO ₄ (BV) 催化剂。在室温 (RT-BV) 和 350 °C 下制备 12 h (BV350/12) 的催化剂分别表现出球形和高度结晶的板状颗粒。通过添加氧化石墨GO/BV制备了一种新型BV催化剂。合成条件影响微晶尺寸、结晶度、光学边缘、能隙、比面积特性和光催化活性。GO/BV 使用低功率蓝色 LED 照射（300 分钟）实现了 100% 罗丹明 B (RhB) 降解。初始反应速率（-r ₀) 使用 GO/BV 的 RhB 比 RT-BV、BV350/12 和 BV350/2 快 4.57、3.42 和 1.31 倍。分析了催化剂用量和 RhB 初始浓度对 GO/BV 光活性的影响。捕获实验表明空穴和羟基自由基是导致 RhB 降解的主要氧化物质，其机制是基于 GO/BV 假设的。可重复使用性测试证实了 GO/BV 的化学稳定性。GO/BV 对亚甲蓝 (MB) 的光降解率达到 74%。使用 GO/BV 对 RhB + MB 混合物的光降解表明，MB 的共存使 RhB 降解减少到 86%。