The preparation of Ag/ZIF-8@ZIF-67 core-shell composites as excellent catalyst for degradation of the nitroaromatic compounds

Facile MOF Support Improvement in Synergy with Light Acceleration for Efficient Nanoalloy-Catalyzed H2 Production from Formic Acid

“…The pore diameter of the ZIF-8@ZIF-67 (1.75 nm) gradually increased compared to that of ZIF-8 itself (1.39 nm), and the BET surface area of the ZIF-8@ZIF-67 (2160.8 m 2 g –1 ) shows an increase compared to that of ZIF-8 itself (1857.9 m 2 g –1 ). This increment is attributed to the size increase of the shell of ZIF-67 on the surface of ZIF-8 itself without blockage of the pores at the core–shell interfaces. ,, After the addition of PdAg NPs, the surface and total volume of the pores of ZIF-8@ZIF-67 indicated a decrease, which suggests that the core–shell ZIF pores are occupied by PdAg NPs, which is consistent with the HRTEM results (Figure ).…”

Electrostatic Interaction-Controlled Formation of Pickering Emulsion for Continuous Flow Catalysis

“…Without ACNF, the Pickering emulsion cannot be produced by using only Ag nanoparticles with a size around 20 nm (Figure S6), which have very low attachment energy (Δ E ) for adsorption at the oil–water interface. Moreover, the catalytic activity of ACNF@Ag2 is comparable to or even higher than the previously reported Ag-based catalysts, such as Ag/C spheres ( k = 0.10 min –1 and TOF = 0.6 h –1 ), Ag/ZIF-8@ZIF-67 ( k = 0.7334 min –1 , TOF = 336.66 h –1 ), Ag@FDU-15 ( k = 0.7848 min –1 , TOF = 444 h –1 ), PZS@Ag NPs ( k = 0.666 min –1 , TOF = 101.4 h –1 ), Ag NPs@CMG ( k = 0.204 min –1 , TOF = 230.4 h –1 ), Fe 3 O 4 /Ag@NFC ( k = 0.2 min –1 , TOF = 157.0 h –1 ), Ag-2/C ( k = 0.972 min –1 , TOF = 46.8 h –1 ), and Ag NP-decorated C 3 O 4 ( k = 0.1218 min –1 , TOF = 22.0 h –1 ) . Taking account of its favorable catalytic activity and enhanced stabilization of emulsion droplets, ACNF@Ag2 is expected to promote the efficient continuous catalytic reaction over the Pickering emulsion.…”

Tactfully Assembled CuMOF/CdS S-Scheme Heterojunction for High-Performance Photocatalytic H2 Evolution under Visible Light

“…For example, Li’s group summarized the design of ZIF-67 for photocatalytic hydrogen evolution . Although MOF materials have been extensively studied in the field of photocatalysis, the single-component MOF materials have their own shortcomings, which lead to inefficient performance in the catalytic hydrogen evolution process . Therefore, methods such as surface phosphating, element doping, and construction of heterojunctions are performed on MOF materials to improve the catalytic effect.…”

“…32 Although MOF materials have been extensively studied in the field of photocatalysis, the single-component MOF materials have their own shortcomings, which lead to inefficient performance in the catalytic hydrogen evolution process. 33 Therefore, methods such as surface phosphating, element doping, and construction of heterojunctions are performed on MOF materials to improve the catalytic effect. The S-scheme heterojunction has a strong redox ability, which is in accordance with the thermodynamic requirements of the photocatalytic reaction process.…”