In this study, Fe₂O₃/graphitic carbon nitride (g-CN) composites were fabricated using a simple calcination method. Iron chloride and urea were used as starting precursors for preparation of heterojunction composites (Fe₂O₃/g-CN) by a quick stirring and calcination method. A sequence of Fe₂O₃/g-CN composites were obtained by putting a specific amount of Fe₂O₃ on the surface of g-CN at varied temperature (400, 450 and 500 °C). We accomplished a combined analysis using x-ray diffraction (XRD), Fourier transform IR spectroscopy (FTIR), electron paramagnetic resonance (EPR), elemental analysis spectra (EAS), Brunauer–Emmett–Teller analysis (BET), diffuse reflectance spectra (DRS) and photoluminescence spectra (Pl) of resulting samples. Our findings demonstrate that Fe/CN_x composites demonstrating a significant improvement in the separation of photogenerated carriers and hole formation, leading towards momentous photocatalytic activity. For the first time, the as-synthesized composites were used for hydrogen production (water reduction) and methylene blue photodegradation under visible light illumination (λ = 420 nm). The superior sample Fe/CN₄₅₀ exhibits an exceptional photocatalytic efficiency in both electron generation (hydrogen evolution rate) and hole formation (photodegradation) with a rate of 91.1% at 180 min. Along with this, Fe/CN₄₅₀ has excellent photochemical stability in hydrogen evolution and pollutant removal. The potential photocatalytic mechanism of Fe/CN₄₅₀ composite is compared with experimental results to characterize the photocatalytic phenomenon as a whole. © 2021 Society of Chemical Industry

中文翻译：

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均质铁掺杂碳氮化物基有机催化剂在可见光驱动下具有惊人的光催化性能

在这项研究中，Fe ₂ O ₃ /石墨氮化碳（g-CN）复合材料是使用简单的煅烧方法制造的。氯化铁和尿素被用作通过快速搅拌和煅烧方法制备异质结复合材料（Fe ₂ O ₃ /g-CN）的起始前体。通过加入一定量的Fe ₂ O ₃得到一系列Fe ₂ O ₃ /g-CN复合材料在不同温度（400、450 和 500 °C）下的 g-CN 表面。我们使用 X 射线衍射 (XRD)、傅里叶变换红外光谱 (FTIR)、电子顺磁共振 (EPR)、元素分析光谱 (EAS)、布鲁诺-埃米特-特勒分析 (BET)、漫反射光谱 ( DRS）和所得样品的光致发光光谱（PI）。我们的研究结果表明，Fe/CN _x复合材料在光生载流子的分离和空穴形成方面表现出显着改善，导致了重大的光催化活性。合成的复合材料首次用于在可见光照射下（λ  = 420 nm）制氢（水还原）和亚甲蓝光降解。上等样品 Fe/CN₄₅₀在电子生成（析氢速率）和空穴形成（光降解）方面均表现出卓越的光催化效率，180 分钟时的速率为 91.1%。与此同时，Fe/CN ₄₅₀在析氢和污染物去除方面具有优异的光化学稳定性。将 Fe/CN ₄₅₀复合材料的潜在光催化机理与实验结果进行比较，从整体上表征光催化现象。© 2021 化学工业协会