CdS/ZIF-67 nanocomposites with enhanced performance for visible light CO2 photoreduction

Photocatalytic and Electrocatalytic Properties of Cu-Loaded ZIF-67-Derivatized Bean Sprout-Like Co-TiO2/Ti Nanostructures

“…The normalized Ti 2p peaks showed no critical difference with Cu thickness after CO 2 reduction ( Supplemental Information, Figure S1(a1–a3) . However, for the Co 2p XPS of Cu (240 s)-Co-TiO 2 /Ti sample ( Figure 6 b), satellite peaks at 786 eV and 802 eV were enhanced after the photocatalytic CO 2 reduction, which was attributed to an increase in CoO state ( Supplemental Information, Figure S1(b1–b3) [ 15 , 27 , 43 , 48 ]. For the O 1s XPS profiles, the XPS O ad /O lattice ratios were substantially changed after the photocatalytic CO 2 reduction.…”

“…Metal–organic frameworks (MOFs) including other materials have been extensively employed in diverse application areas such as environments, adsorbents, organic light emitting displays, sensors and catalysts [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ]. Among diverse MOFs, the zeolitic imidazolate framework (ZIF) exhibits zeolite-like topologies where imidazolate linkers are connected with tetrahedrally coordinated transition metal ions such as Co and Zn [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ]. In this ZIF-class, ZIF-67 has Co-N tetrahedral coordination commonly synthesized with Co(II) precursor and 2-methylimidazole [ 5 , 6 , 7 , 8 , 9 , 10 ].…”

“…The developed catalyst showed high light absorption and charge transfer efficiency for higher photocatalytic performance. For an application area of CO 2 reduction [ 25 , 26 , 27 ], CdS/ZIF-67 nanocomposites were synthesized by a simple wet reaction method and tested for photocatalytic CO 2 reduction reaction under a 300 W Xe lamp (with 420 nm cut-off filter) [ 23 ]. The catalysts showed CO and H 2 as the main products, with 184 μmol g −1 ·h −1 and 1098 μmol g −1 h −1 , respectively, and a CO selectivity of 5–45%.…”

“…As discussed in the literature, many strategies have been employed and the consequent materials have been tested in various application areas [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ]. Motivated by this, we seek to further widen the synthesis of ZIP-derivatized catalyst materials and examine new physicochemical properties of a newly synthesized material.…”

“…Thus, we prepared bean sprout-like Co-TiO 2 /Ti nanostructures by the thermal treatment of ZIF-67/Ti hybrid structure and demonstrated diverse catalytic applications of photocatalytic CO 2 reduction, electrochemical CO 2 reduction and electrochemical oxygen evolution reaction. Although ZIF-derivatized catalyst have been extensively studied for water splitting, few studies have been reported related to CO 2 reduction [ 25 , 26 , 27 ]. Therefore, the present study shows some data sets for catalytic performances on CO 2 reduction.…”