Construction of SnNb₂O₆/MgIn₂S₄ heterojunction photocatalysts with enhanced visible-light-driven activity for tetracycline hydrochloride degradation and Cr(vi) reduction

Abstract

SnNb2O6/MgIn2S4(SNO/MIS) heterojunction photocatalytic materials were fabricated via a handy in-situ growth method. Under the illumination of visible light, photocatalytic degradation of tetracycline hydrochloride (TC) and photocatalytic reduction of potassium dichromate...

3D MoS2/MgIn2S4 Nanoflower Heterojunctions for Photoreduction of Cr(VI): Mechanism, Influence, and Toxicity Evaluation

“…For In 3d (Figure d), the two peaks at 445.05 and 453.57 eV were attributed to In 3d 5/2 and In 3d 3/2 of In 3+ , respectively. The two S 2p peaks of MS belonged to S 2p 3/2 and S 2p 1/2 , respectively (Figure e), indicating that S in MS was present in the form of S. − MIS and the 3% MS/MIS generally showed similar spectra, except for the peak of Mo. For Mo 3d (Figure f), the XPS peaks of Mo in MS can be divided into three core-level XPS peaks.…”

“…Owing to the above excellent characteristics, MgIn 2 S 4 has been used in hydrogen production, 38 CO 2 reduction, 39 organic pollutant degradation, 40 and heavy metal reduction. 41 However, in comparison with other highly efficient photocatalysts, MgInS 4 remains unsatisfactory owing to its relatively high photogenerated electron and hole recombination efficiency and must be modified to achieve high photocatalytic performance. The construction of semiconductor heterojunctions with other semiconductors having suitable band gaps is a well-documented and effective method to facilitate photogenerated carrier migration, 42 with MgIn 2 S 4 @ In 2 O 3 , 43,44 MgIn 2 S 4 /oxygen-doped g-C 3 N 4 , 45 and MgIn 2 S 4 / Bi 2 WO 6 46 being examples.…”

“…Ternary metal sulfides such as ZnIn 2 S 4 , CaIn 2 S 4 , MgIn 2 S 4 , CdIn 2 S 4 , and MnIn 2 S 4 − have attracted much attention from researchers in the photocatalysis field due to their unique crystal structure, visible light-driven, suitable negative band edge potential level and diverse catalytic functions. − Among them, MgIn 2 S 4, as a suitable band gap photocatalytic material has received much research attention due to its relatively broad photoresponse, significant chemical stability, and tunable band gap structure. Owing to the above excellent characteristics, MgIn 2 S 4 has been used in hydrogen production, CO 2 reduction, organic pollutant degradation, and heavy metal reduction . However, in comparison with other highly efficient photocatalysts, MgInS 4 remains unsatisfactory owing to its relatively high photogenerated electron and hole recombination efficiency and must be modified to achieve high photocatalytic performance.…”