Metal–organic framework (MOF)-5/CuO@ZnIn₂S₄core–shell Z-scheme tandem heterojunctions for improved charge separation and enhanced photocatalytic performance

Abstract

Metal-organic framework (MOF)-5/CuO@ZnIn2S4 core-shell Z-scheme tandem heterojunctions with photothermal effects are prepared by solvothermal and oxidative composite methods to promote spatial charge separation and light utilization.

Strong Host–Guest Dependence on the Emissive Properties of MOF-5 and [Zn2(BTTB)(DMF)2•(H2O)3]n

“…A closer look at why this is so, the main reason stems from a very small value of ε, which renders the J overlap integrals of the Forster and Dexter theories small, not to say negligible. This outcome (i.e., no or very low number of exciton hopping across the networks) indicates that the rich photocatalytic activity mentioned above ,,− ,,− ,− is not aided by the excitation energy migration. Therefore, the interior of the particles or nanoparticles does not contribute by the so-called antenna effect to the photochemical transformations that may occur at the surface of these porous objects.…”

“…Despite the rich photocatalytic properties of MOF-5 , ,,− ,,− ,− it is quite surprising that no S 1 –S 1 annihilation occurs. This result indicates that there no noticeable excitation energy migration across both MOF-5 ’s and MOF-D ’s scaffolding.…”

“…Metal–organic frameworks (MOFs) are known to exhibit rich heterogeneous excited-state-driven catalytic activity, and the semiconducting and emissive MOF-5 (3D-[ Zn 4 O­( 1,4-BDC ) 3 ] n ) (BDC = 1,4 - benzodicarboxylate) has been found to make no exception over the past several years. Indeed, semiconductor@ MOF-5 composites have become notorious for various photocatalytic applications such as H 2 -production, − O 2 -evolution, degradation of toxic organics and pollutants, − bacterial inactivation, − Cr­(VI)-reduction, and organic reactions , and pesticides .…”

Construction of a dual-signal molecularly imprinted photoelectrochemical sensor based on bias potential control for selective sensing of tetracycline

“…According to previous reports, 40,41 a one-step solvothermal method was applied to prepare ZnIn 2 S 4 . 0.136 g of ZnCl 2 (1 mmol), 0.586 g of InCl 3 –4H 2 O (2 mmol), and 0.307 g of CH 3 CSNH 2 (thioacetamide, TAA) (6 mmol) were added to 60 mL of deionized water, and stirred magnetically for 30 min until fully dissolved.…”

“…The experimental results confirm that this new dual-signal MIP-PEC sensor has a wide linear range with low detection limits, good selectivity, stability and reproducibility for detecting tetracycline residues in hydrated milk. According to previous reports, 40,41 a one-step solvothermal method was applied to prepare ZnIn 2 S 4 . 0.136 g of ZnCl 2 (1 mmol), 0.586 g of InCl 3 -4H 2 O (2 mmol), and 0.307 g of Scheme 1 The fabrication process of the MIP-PEC sensor for TC detection.…”