Highly efficient and selective photocatalytic CO₂ reduction based on water-soluble CdS QDs modified by the mixed ligands in one pot

Abstract

The noble metal-free photocatalysts with good water solubility, high efficiency and high selectivity to promote CO2 conversion.

A Hybrid Assembly with Nickel Poly‐Pyridine Polymer on CdS Quantum Dots for Photo‐Reducing CO2 into Syngas with Controlled H2/CO Ratios

“…While increasing the ratio between CdS and NiP from 1 : 1 to 8 : 1, the CO production rate was firstly increased and then decreased (Figure 2d). It implied that the CdS core selectively serves to yield CO from CO 2 [5b] . Under the experimental condition, syngas evolution rate of the assemblies can achieve over 5500 μmol g cat −1 h −1 with a H 2 /CO ratio ranging from 4 : 1 to 1 : 3.…”

“…Since the highest occupied molecular orbital (HOMO) location of ETP (1.07 V, shown in Figure 2a and Figure S13) is more negative than VB of MPA‐CdS, it entails holes to move away from QDs surface. In combination, the defect emission is quenched at lower energies [5b,21] . The PL intensity of CdS‐Ni (4 : 1) assembly was further weakened.…”

“…MPA‐CdS QDs : The preparation of thiohydracrylic acid‐modified CdS QDs (MPA‐CdS QDs) was based on literature as previously reported [5b,28] …”

Morphology-Governed Performance of Multi-Dimensional Photocatalysts for Hydrogen Generation

“…For example, cadmium sulfide has been widely used for the formation of coupled materials with advanced morphology, forming efficient and stable photocatalysts, e.g., CdS/Co 9 S 8 (3D/0D) [180], CdS/TiO 2 (1D/2D) [181], and CdS/MoS 2 (1D/2D) [182]. Although CdS, in the form of QDs (0D), is commonly applied in photocatalysis [183][184][185], other organized structures have also been proposed. For example, 3D hierarchical CdS supporting 0D Co 9 S 8 NPs has been prepared via a facile solvothermal method [180].…”

Visible‐Light‐Mediated Oxidative Amidation of Aldehydes by Using Magnetic CdS Quantum Dots as a Photocatalyst

“…[39][40][41][42][43] Amongthe available photoactive semiconductor materials, cadmium sulfide( CdS) has attracted widespread attention because of its narrower visible-light-response band gap (approximately 2.4 eV) and more suitable band-edge position. [44] CdS and CdS-based composite materials have been used as photocatalysts for various critical fields, including water splitting, [45] CO 2 reduction, [46] nitrogen fixation, [47] environmentalp ollutant treatment, [48] and organic synthesis. [49][50][51][52][53][54][55][56] However,t he application of single-phase CdS in photocatalysis is still restricted because the recombination of photogenerated carriers occurs quickly.…”