New Core–Shell Nanocomposite Based on Co₃O₄Quantum Dots and Fe-Infinite Coordination Polymer with Efficient Charge Separation Properties as Visible Light Photocatalyst and Photo-electrocatalyst

Abstract

A new core−shell nanocomposite was designed by functionalization of a Co 3 O 4 quantum dots (Co 3 O 4 -QDs) core with terephthalic acid (TPA) and growth of an Fe-infinite coordination polymer (Fe-ICP) shell on the core surface. High-resolution transmission electron microscopy (HR-TEM) confirmed the core− shell structure of the prepared Co 3 O 4 -QDs@Fe-ICP nanocomposite. Co 3 O 4 -QDs@ Fe-ICP exhibited high catalytic, visible light photocatalytic, and photoelectrocatalytic activity in degradation of rhodamine B (RhB), reactive orange 29 (RAO29), and crystal violet (CV) as compared to the individual Co 3 O 4 -QDs and Fe-ICP. The high photocatalytic, photoelectrocatalytic, and catalytic activities of Co 3 O 4 -QDs@ Fe-ICP in comparison with Co 3 O 4 -QDs and Fe-ICP were attributed to the interconnection of Co 3 O 4 -QDs and Fe-ICP within the core−shell structure. Impressively, the existence of the Fe-ICP shell is critical for not only efficient charge separation and enhancing the catalytic performance but also preventing Co 3 O 4 -QDs from aggregation during the degradation process.

TiO2 supported cobalt oxide for olefin epoxidation reaction – characterization, catalytic activities and mechanism – using a DFT model

“…6,8,9 In this context, cobalt is preferred due to the effective dispersion and stabilization characteristics of the material. [10][11][12][13] Co 3 O 4 quantum dot (QD)-polyoxometalate nanocomposites have been reported to show high photoelectrocatalytic activity in the oxidation of benzyl alcohol. 10 Co 3 O 4 -QDs have been reported to increase visible light absorption and the formation of nanocomposite structures enhances the photogenerated charge separation and photoelectrocatalytic performance.…”

Co3O4 Quantum Dot-Catalyzed Lithium Oxalate as a Capacity and Cycle-Life Enhancer in Lithium-Ion Full Cells

“…Co 3 O 4 -QDs (size ∼3 nm) were synthesized according to the reported literature with some modifications . Co­(CH 3 COO) 2 ·4H 2 O (0.5 g, Aladdin, 99.9%) was dissolved in ethanol (30 mL) at 30 °C with stirring.…”

“…Co 3 O 4 -QDs (size ∼3 nm) were synthesized according to the reported literature with some modifications. 24 Co(CH 3 COO) 2 •4H 2 O (0.5 g, Aladdin, 99.9%) was dissolved in ethanol (30 mL) at 30 °C with stirring. After complete dissolution, ammonia (3.0 mL, Aladdin, 28% NH 3 in H 2 O) was slowly added to the above solution with stirring.…”

Stepwise Growth of Copper-Based Coordination Polymer on α-MnO2 Nanorods for Sustainable Reduction of Nitroarenes

“…Coordination polymers (CPs) are crystalline or amorphous solids constructed through coordination bonding between metal clusters/ions and organic ligands. − This kind of material has attracted considerable attention as either the catalyst or catalyst support. − The relatively facile formation through self-assembly, proper availability of the catalytic sites, and easy recovery/reusability are three main advantages that make these compounds promising candidates for various heterogeneous catalytic applications. , In particular, the combination of CPs with other materials is more advantageous for catalytic application since it offers synergistic effects for boosting catalytic activities. , …”