TY - JOUR
T1 - Green synthesis of graphite-based photo-Fenton nanocatalyst from waste tar via a self-reduction and solvent-free strategy
AU - Li, Dong
AU - Yang, Tianxue
AU - Liu, Zhengang
AU - Xia, Yu
AU - Chen, Zeliang
AU - Yang, Shengshu
AU - Gai, Chao
AU - Bhatnagar, Amit
AU - Ng, Yun Hau
AU - Ok, Yong Sik
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/6/10
Y1 - 2022/6/10
N2 - Thermochemical conversion of biomass yields large quantities of tar as a by-product, which is a potential precursor for the synthesis of renewable carbon-based functional materials. In this study, high-performance photo-Fenton catalyst of graphite‑carbon-supported iron nanoparticles was synthesized using a self-reduction and solvent-free approach. The results showed that the tar-derived catalyst had unique properties including a defect-rich graphitic structure, high surface area, and an abundant porous structure resulting from the inherent properties of biomass tar. The iron nanoparticles were highly dispersed within the prepared catalysts and were stably anchored on the carbonaceous surface by the Fe–C bond. The prepared nanocatalyst showed the highest decomposition constant (91.87 × 10−3 min−1) for 20 mM H2O2, and 40 mg/L RhB can be completely degraded within 2 h under catalyst dosage of 1 g/L and H2O2 addition of 20 mM. The degradation mechanism under the photo-Fenton catalyst/H2O2/light system included the heterogeneous Fenton reaction of iron nanoparticles and photo-Fenton reaction of iron oxide, and the efficient RhB degradation was mainly ascribed to the heterogeneous Fenton reaction. In addition, recycling and leaching tests demonstrated that the photo-Fenton catalyst had excellent reusability and stability, where only 7.3% catalytic reactivity was reduced after five cycles. This work provided a green, sustainable, and facile approach for synthesizing photo-Fenton catalysts by value-added utilization of tar wastes.
AB - Thermochemical conversion of biomass yields large quantities of tar as a by-product, which is a potential precursor for the synthesis of renewable carbon-based functional materials. In this study, high-performance photo-Fenton catalyst of graphite‑carbon-supported iron nanoparticles was synthesized using a self-reduction and solvent-free approach. The results showed that the tar-derived catalyst had unique properties including a defect-rich graphitic structure, high surface area, and an abundant porous structure resulting from the inherent properties of biomass tar. The iron nanoparticles were highly dispersed within the prepared catalysts and were stably anchored on the carbonaceous surface by the Fe–C bond. The prepared nanocatalyst showed the highest decomposition constant (91.87 × 10−3 min−1) for 20 mM H2O2, and 40 mg/L RhB can be completely degraded within 2 h under catalyst dosage of 1 g/L and H2O2 addition of 20 mM. The degradation mechanism under the photo-Fenton catalyst/H2O2/light system included the heterogeneous Fenton reaction of iron nanoparticles and photo-Fenton reaction of iron oxide, and the efficient RhB degradation was mainly ascribed to the heterogeneous Fenton reaction. In addition, recycling and leaching tests demonstrated that the photo-Fenton catalyst had excellent reusability and stability, where only 7.3% catalytic reactivity was reduced after five cycles. This work provided a green, sustainable, and facile approach for synthesizing photo-Fenton catalysts by value-added utilization of tar wastes.
KW - Biomass conversion
KW - Carbonaceous materials
KW - Green synthesis
KW - Nanoparticles
KW - Sustainable waste management
UR - http://www.scopus.com/inward/record.url?scp=85124645142&partnerID=8YFLogxK
U2 - 10.1016/j.scitotenv.2022.153772
DO - 10.1016/j.scitotenv.2022.153772
M3 - Article
C2 - 35181358
AN - SCOPUS:85124645142
SN - 0048-9697
VL - 824
JO - Science of The Total Environment
JF - Science of The Total Environment
M1 - 153772
ER -