TY - JOUR
T1 - Construction of NH2-UiO-66/BiOBr composites with boosted photocatalytic activity for the removal of contaminants
AU - Hu, Qingsong
AU - Chen, Yong
AU - Li, Ming
AU - Zhang, Yi
AU - Wang, Bin
AU - Zhao, Yaping
AU - Xia, Jiexiang
AU - Yin, S.
AU - Li, Huaming
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/10/20
Y1 - 2019/10/20
N2 - Metal-organic framework (MOF) have gained significant interest for photocatalysis, mainly due to the advantages of the regulable semiconducting characteristics and tunable porous structure. In this work, a novel heterojunction of NH2-UiO-66/BiOBr composites were successfully synthesized via the growth of BiOBr nanosheets on the surface of these NH2-UiO-66 octahedrons. The as-prepared composites showed a large interface contact area, which ensured preferable charge carriers transfer between NH2-UiO-66 and BiOBr. In addition, the increased specific surface area endowed NH2-UiO-66/BiOBr composites with high adsorption capacity for contaminants. As a consequence, the composites displayed enhanced photocatalytic performance for tetracycline hydrochloride (TC) degradation and Cr(VI) reduction in comparison with BiOBr or NH2-UiO-66, and the ideal NH2-UiO-66 content was around 15 wt%. Superoxide radical (O2 [rad] −) and holes (h+) acted as a key role in the degradation of TC, while electrons (e−) and O2 [rad] − were the major active groups involved in Cr(VI) reduction owing to reactive-species-quenching experiments and electron spin resonance (ESR) technique. Furthermore, a possible TC degradation pathway was explored based on the mass spectroscopy (MS) analysis. The introduction of MOF into inorganic photocatalysts exhibits a promising strategy to enhance the photoreactivity of the catalysts in the field of water purification.
AB - Metal-organic framework (MOF) have gained significant interest for photocatalysis, mainly due to the advantages of the regulable semiconducting characteristics and tunable porous structure. In this work, a novel heterojunction of NH2-UiO-66/BiOBr composites were successfully synthesized via the growth of BiOBr nanosheets on the surface of these NH2-UiO-66 octahedrons. The as-prepared composites showed a large interface contact area, which ensured preferable charge carriers transfer between NH2-UiO-66 and BiOBr. In addition, the increased specific surface area endowed NH2-UiO-66/BiOBr composites with high adsorption capacity for contaminants. As a consequence, the composites displayed enhanced photocatalytic performance for tetracycline hydrochloride (TC) degradation and Cr(VI) reduction in comparison with BiOBr or NH2-UiO-66, and the ideal NH2-UiO-66 content was around 15 wt%. Superoxide radical (O2 [rad] −) and holes (h+) acted as a key role in the degradation of TC, while electrons (e−) and O2 [rad] − were the major active groups involved in Cr(VI) reduction owing to reactive-species-quenching experiments and electron spin resonance (ESR) technique. Furthermore, a possible TC degradation pathway was explored based on the mass spectroscopy (MS) analysis. The introduction of MOF into inorganic photocatalysts exhibits a promising strategy to enhance the photoreactivity of the catalysts in the field of water purification.
KW - BiOBr
KW - Charge carrier migration
KW - Heterojunction
KW - Metal-organic framework
KW - Photo reactivity
UR - https://www.scopus.com/pages/publications/85068762609
U2 - 10.1016/j.colsurfa.2019.123625
DO - 10.1016/j.colsurfa.2019.123625
M3 - 文章
AN - SCOPUS:85068762609
SN - 0927-7757
VL - 579
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
M1 - 123625
ER -