Simultaneously enhanced photocatalytic cleanup of Cr(vi) and tetracycline via a ZnIn₂S₄ nanoflake-decorated 24-faceted concave MIL-88B(Fe) polyhedron S-scheme system

Abstract

The coexistence of heavy metals and antibiotics in modern wastewater causes unprecedented challenges to simultaneously eliminate these contaminants, resulting in the urgent demand for developing highly-efficient photocatalysts. Herein, we devised...

Sewage remediation using solar energy and a triply fused Zn-porphyrin dimer molecular graphene photocatalytic agent

“…This result show that the reduction of Cr( vi ) to Cr( iii ) by Oligo-Zn-Por catalyzed by sunlight can be realized. 48…”

“…Finally, we evaluated the mechanism of the solar photocatalysis of Cr( vi ) reduction by Oligo-Zn-Por using radical, hole, and electron capture experiments and electron spin resonance (ESR) spectroscopy. 48–50 The active components of the solar photocatalytic reduction of Cr( vi ) were determined using benzoquinone (BQ), isopropanol (IPA), disodium ethylene diamine tetraacetic acid (EDTA-2Na) and potassium bromide (KBr) as trapping agents for superoxide radicals (·O 2 − ), hydroxyl radicals (·OH), holes (h + ), and electrons (e − ), respectively. Fig.…”

Janus SMoZAZ′ (A = Si, Ge; Z, Z′ = N, P, As; Z ≠ Z′) monolayers: potential water-splitting photocatalyst with low carrier recombination rate

“…The renewable and environmentally friendly nature of solar and hydrogen energy, has made photocatalytic decomposition of water using sunlight a promising alternative to address environmental pollution and energy shortages. [1][2][3][4][5][6][7][8][9] The pioneering work of Fujishima and Honda in 1972 on TiO 2 semiconductors opened up extensive research interest in semiconductor-based photocatalysts. 10 However, traditional three-dimensional (3D) photocatalysts suffer from poor light absorption and high electron-hole recombination rates.…”

Graphene oxide modulated dual S-scheme ultrathin heterojunctions with iron phthalocyanine and phase-mixed bismuth molybdate as wide visible-light catalysts

“…17,18 One of the most promising methods is to construct an S-scheme heterojunction with reduced semiconductors, which not only improves charge separation but also preserves the strong redox ability due to the negative conduction band of the reduced semiconductors. 19–21 Many Bi 2 MoO 6 -based S-scheme heterojunctions like CdS QDs/Bi 2 MoO 6 , 22 Bi 2 S 3 /OV-Bi 2 MoO 6 23 and Bi 2 Sn 2 O 7 /Bi 2 MoO 6 24 have been demonstrated to improve the photocatalytic activities. However, S-scheme heterojunctions composed of different semiconductors usually have mismatched heterogeneous interfaces, resulting in high interfacial charge recombination and thereby greatly reducing the photocatalytic activities.…”