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首页> 外文期刊>Environmental Science and Pollution Research >Graphitic carbon nitride-doped sewage sludge as a novel material for photodegradation of Eriochrome Black T
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Graphitic carbon nitride-doped sewage sludge as a novel material for photodegradation of Eriochrome Black T

机译：石墨碳氮化物掺杂污水污泥作为一种用于光致黑色光降解的新型材料

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摘要

The bio-resource utilization of sewage sludge is presented by preparation of novel waste sludge-doped graphite carbon nitride (g-C3N4) photocatalyst. The sludge flocs which constitute bacteria and organic substances served as a pore-forming framework in the catalyst, while the inorganic fractions including those transition metals and crustal metals can function as dopants for sludge-based g-C3N4 composite. The physicochemical properties of as-prepared catalyst were well analyzed by multiple characterizations. The composite catalyst showed higher surface area (50 m(2)/g) and more mesoporous structures (8.9 x 10(-2) cm(3)/g) as compared with pristine g-C3N4 (8.4 m(2)/g and 6.6 x 10(-2) cm(3)/g, respectively). The photoelectrochemical results showed that introduced sewage sludge impurities lowered down the photocarriers recombination efficiency and enhanced more efficient electron-hole separation by about 100 times. The photocatalytic activity was tested by degradation of typical dye Eriochrome Black T (EBT). The optimal sample improved removal of EBT by 56% in 90 min under ultraviolet irradiation (lambda = 254 nm). According to the results of main metal ion leaching concentration and reuse tests, the composite catalyst exhibited excellent stability and repeatability.
机译：通过制备新的废污泥掺杂石墨碳氮（G-C3N4）光催化剂来提出污水污泥的生物资源利用。构成细菌和有机物质的污泥絮凝物作为催化剂中的孔形成骨架，而包括这些过渡金属和地壳金属的无机馏分可以用作污泥的G-C3N4复合材料的掺杂剂。通过多种表征良好地分析了制备催化剂的物理化学性质。与原始G-C3N4相比，复合催化剂显示出较高的表面积（50μm（2）/ g）和更高的介孔结构（8.9×10（-2）cm（3）cm（3）cm（3）cm（3）cm（3）/ g）（8.4m（2）/ g和6.6×10（-2）cm（3）/ g分别）。光电化学结果表明，引入的污水污泥杂质降低了光载体重组效率，并通过约100次增强了更有效的电子空穴分离。通过典型染料埃里克罗姆黑T（EBT）的降解测试光催化活性。在紫外线照射（Lambda = 254nm）下，最佳样品在90分钟内将EBT的除去56％改善了56％。根据主要金属离子浸出浓度和再利用试验的结果，复合催化剂表现出优异的稳定性和可重复性。

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