TY - JOUR
T1 - Novel methods of sewage sludge utilization for photocatalytic degradation of tetracycline-containing wastewater
AU - Zhu, Xuefeng
AU - Yuan, Wenyi
AU - Lang, Maoqian
AU - Zhen, Guangyin
AU - Zhang, Xuedong
AU - Lu, Xueqin
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/9/15
Y1 - 2019/9/15
N2 - 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.
AB - 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.
KW - Photocatalytic activity
KW - Reutilization
KW - Sewage sludge
KW - Tetracycline
KW - TiO photocatalysts
UR - https://www.scopus.com/pages/publications/85064484751
U2 - 10.1016/j.fuel.2019.04.093
DO - 10.1016/j.fuel.2019.04.093
M3 - 文章
AN - SCOPUS:85064484751
SN - 0016-2361
VL - 252
SP - 148
EP - 156
JO - Fuel
JF - Fuel
ER -