Hollow Co₃O₄/CdS Nanoparticles for Photocatalytic Hydrogen Evolution and Photodegradation

Abstract

Ultrathin hollow core–shell nano pn junction of Co3O4/CdS is fabricated by chemical-calcination method. The Co3O4/CdS nano pn junction (Co/Cd-3) exhibits prominently enhanced photocatalytic hydrogen evolution (∼6250.47 μmol·g–1·h–1) and photodegradation compared to those of Co3O4 (∼90-fold/∼35-fold) and CdS (∼60-fold/∼30-fold). Co3O4/CdS nano pn junction with greater potential gradient and Co3O4 with higher absorption can ameliorate the carrier efficiency, including transportation increasing, lifetime prolonging, and recombination decreasing. In addition, formed ultrathin hollow nanostructure can increase photocatalytic active sites and light reflections and shorten carrier pathway, while still maintaining good stability.

Electrocatalytic Activity Enhancement of Multifunctional Co3O4 Nanorods for Glucose Sensing and Oxygen Evolution Reaction

“…The electrochemical double-layer capacitance ( C dl ) is directly linked to the electrochemically active surface area (ECSA) . As depicted in Figure d, the C dl values of the two samples (by monitoring CV scan curves in the non-Faradaic region as shown in Figure S5) are 9.98 and 6.85 mF cm –2 , respectively, indicating that PANI/Co 3 O 4 NRs 1:2 possesses a larger ECSA for OER compared to Co 3 O 4 NRs.…”

“…The electrochemical double-layer capacitance (C dl ) is directly linked to the electrochemically active surface area (ECSA). 56 As depicted in Figure 7d Figure 7f presents a comparison between the initial test and the second test after 5 days in air for the PANI/Co 3 O 4 NRs 1:2 electrode. Notably, there is no discernible current attenuation, affirming its excellent stability and certain reusability.…”

Directional Growth of Bi2WO6 with Highly Exposed Facets on 2D‐Co3O4 for different Properties under two Light Sources

“…[2][3][4] Cobalt oxide (Co 3 O 4 ) is a normal p-type semiconductor with excellent catalytic properties and is widely used in various fields. [5][6][7] Co 3 O 4 catalytic materials are reported as different morphologies, and it is all known that various morphologies and structures will demonstrate various catalytic abilities because of the surface exposure of the active position. However, Co 3 O 4 individual catalyst suffers some problems that could constraint the catalytic activity.…”