题名：Novel methods of sewage sludge utilization for photocatalytic degradation of tetracycline-containing wastewater

来源：Fuel

发表年代：2019年

作者：Xuefeng Zhu, Wenyi Yuan, Maoqian Lang, Guangyin Zhen*, Xuedong Zhang*, Xueqin Lu

Abstract  Two types of novel municipal sewage sludge (SS) combined TiO₂ photocatalysts (ST1 and ST₂) were synthesized through calcination treatment under different atmospheres (air and N₂). The morphology, structure, and chemical states of photocatalysts were characterized by SEM, XRD, EDS, FT-IR, Raman UV–Vis, BET, and TG-IR. The results showed that ST₂ consisted of a mesoporous graphene-like structure (20.02 nm) displayed exhibited better visible light photocatalytic performances and the highest BET surface area and pore volume (92.97 m² g⁻¹ and 0.46 cm³/g). The doping of Carbon and transition metals (Al, Mg) in TiO₂ strengthened visible-light response by lowering the band gap. The photocatalytic ability is evaluated in the degradation of tetracycline, which is a typical antibiotic in the aquatic environment. The ST₂ photocatalytic efficiency under visible light than that of ST₁ and TiO₂. The enhancement is formed together by porous surface and lower band gap of ST₂, which could offer more active sites and facilitate faster electron-hole pair separation. In addition, the sludge-TiO₂ calcination in N₂ (ST₂) has the potential to reduce CO₂ emission while recovering more energy from the sludge, which turned out to be a more cost-effective way to reutilization of sewage sludge compared with that of calcination in air.

Novel-methods-of-sewage-sludge-utilization-for-photocatalytic-degradation-of-tetracyclinecontaining-wastewaterFuel.pdf