Surface molecule induced effective light absorption and charge transfer for H2 production photocatalysis in a carbonized polymer dots-carbon nitride system

Light-Induced Structural Dynamic Evolution of Pt Single Atoms for Highly Efficient Photocatalytic CO2 Reduction

“…Photocatalysis technology, which employs light to drive the chemical reaction, has played promising roles in many important reactions in the fields of environmental protection and renewable energy conversion with the representative CO 2 reduction and H 2 production. − As an inexhaustible ideal green energy, light energy is restricted in practical application because of its low efficiency in converting into chemical energy. To achieve the high efficiency, the structure of the photocatalyst needs to be regulated from multiple aspects to simultaneously optimize the ability of light harvesting, separation, and migration of photogenerated charges as well as surface reactions, − which makes it a challenge to identify active sites and difficult to accurately reveal the photocatalytic reaction mechanism .…”

Up-conversion effect boosted the photocatalytic CO2 reduction activity of Z-scheme CPDs/BiOBr heterojunction

“…4a, the band gap energy of BiOBr is close to 2.72 eV. The band gap of CPDs (0.67 eV) was 1–12,14–39 obtained according to the literature. 31 The Mott–Schottky plot was further employed to illustrate the type and band structure of BiOBr and CPDs.…”

“…[24][25][26] As a new carbon-based nano-fluorescent material, carbonized polymer dots (CPDs) have the advantages of low toxicity, a wide range of light absorption, photochemical stability, excellent electron transfer ability, and adjustable photoluminescence, all of which provide it with broad application prospects as promoters for photocatalysis or directly as a photocatalyst in the fields of photocatalytic production of H 2 and CO 2 reduction. [27][28][29][30][31] Compared with the traditional inorganic semiconductor photocatalytic materials, the surface of CPDs can be easily modified by rich polar groups, hence it is easier to combine with other nanomaterials. For example, Xia's group 31 successfully anchored CPDs on the surface of PbBiOBr by the in situ self-sacrificial ion method, and the acquired CPDs/PbBiO 2 Br heterojunction could effectively improve the adsorption and desorption capacity of the catalyst.…”

Boosting Hydrogenation of Graphene Quantum Dot-Modified Photocatalysts: Specific Functionalized Modulation at Active Sites

“…Therefore, the electronic structure of the edge sites of GQDs can be effectively tuned through the surface functionalization strategy, 17 regulating their charge transport capacity and facilitating the formation and modulation of functionalized active sites on the surface of composite photocatalysts. 18 However, the asprepared GQDs were always mixed with the precursor of target semiconductor catalysts for constructing hybrid catalysts through conventional hydrothermal or annealing processes, which do not retain the electronic structure of the specific edge sites. 19 In this study, a paradigm was established for constructing adjustable functionalized active sites on the surface of semiconductor-based photocatalysts through an electrostatic selfassembly method.…”

“…Among the various topological nanostructures of carbon, GQDs comprise discrete zero-dimensional carbon NPs with sizes of only 2–10 nm and unique properties of photoinduced electron transfer; moreover, they possess the activity of carrier reservoirs based on their quantum size effects and abundant surface state energy levels. , In contrast with conventional cocatalysts, such as metal NPs and amorphous inorganic oxides, the surfaces of GQDs exhibit enriched densities of functional groups. Therefore, the electronic structure of the edge sites of GQDs can be effectively tuned through the surface functionalization strategy, regulating their charge transport capacity and facilitating the formation and modulation of functionalized active sites on the surface of composite photocatalysts . However, the as-prepared GQDs were always mixed with the precursor of target semiconductor catalysts for constructing hybrid catalysts through conventional hydrothermal or annealing processes, which do not retain the electronic structure of the specific edge sites. , …”