CdSe quantum dots modified thiol functionalized g-C3N4: Intimate interfacial charge transfer between 0D/2D nanostructure for visible light H2 evolution

Ligand-Assisted Charge-Transfer Mechanism: The Case of CdSe/Cysteine/MoS2 Heterostructures

“…Colloidally grown quantum dot (QD) systems, in particular, offer an inexpensive and potentially high-performance , nanostructure, with additional control over the QD optical properties . Colloidal CdSe QDs are commonly used in a variety of applications, including photovoltaics, , photocatalysis, , and photodetection . In these colloidal systems, linker molecules are introduced to stabilize the QDs which also typically anchor QDs to a substrate or other QDs to form a network.…”

Development and Mechanistic Studies of Ternary Nanocomposites for Hydrogen Production from Water Splitting to Yield Sustainable/Green Energy and Environmental Remediation

“…Compared to rGO 2% @ g -C 3 N 4 , an increase in the light absorption ability of HS-rGO 2% @ g -C 3 N 4 is attributed to thiolation [ 35 ]. The associated thiol moieties are excellent hole quenchers and are well known to reduce the recombination rates of electron-hole pairs in the resulting composites [ 20 ]. Further, in the case of AgNPs-S-rGO 2% @ g -C 3 N 4 , the characteristic SPR of AgNPs enhances light absorption.…”

“…Thus, the thiolation of composite materials, rGO and g -C 3 N 4 , can enhance photocatalytic H 2 production in two ways, by dropping the charge-recombination ratios and increasing the light absorption adeptness. The thiolation help to conquer the negative shielding effect of thiolated rGO (HS-rGO), increasing its absorption efficiency and the increased carbon vacancies in thiolated g -C 3 N 4 (HS- g -C 3 N 4 ) act as active territories to reduce the chance of charge recombinations [ 20 ]. In summary, thiolation increases the charge separation capabilities of both HS-rGO and HS- g -C 3 N 4 .…”

“…In view of the previous reports [ 12 , 19 , 20 , 23 , 24 , 25 ], rGO-based composites of g -C 3 N 4 were prepared at different concentrations of HS-rGO, from 1 to 4 wt.%. The thiolated composite (HS-rGO@ g -C 3 N 4 ) with an optimised concentration of HS-rGO of 2 wt.% was selected based on photoluminescence (PL) studies which indicated lesser charge recombinations.…”

Point‐to‐face contact heterojunctions: Interfacial design of 0D nanomaterials on 2D g‐C3N4 towards photocatalytic energy applications

“…Interestingly, loading 3–5 nm CdSe QDs onto g‐C 3 N 4 further enhanced the absorption of light with wavelength smaller than 700 nm (Figure 12B). In addition, Raheman et al 223 constructed CdSe QDs/g‐C 3 N 4 nanosheets with thiol functional (TF) groups as chemical linkers using an in situ growth approach. The TF group enhanced the dispersibility of g‐C 3 N 4 in water and acted as a hole quencher, and its –SH site had the ability to maintain the catalytic center, which reduced the interfacial electron–hole recombination (Figure 12C).…”