A g-C₃N₄/nanocarbon/ZnIn₂S₄nanocomposite: an artificial Z-scheme visible-light photocatalytic system using nanocarbon as the electron mediator

Abstract

A g-C3N4/nanocarbon/ZnIn2S4 (CN/C/ZIS) nanocomposite with enhanced photocatalytic H2 production performance has been successfully synthesized. Based on the experimental results, for the first time, it has been demonstrated that nanocarbon could be integrated into a Z-scheme photocatalytic system and acted as an excellent solid electron mediator.

A Z‐Scheme Strategy that Utilizes ZnIn2S4 and Hierarchical VS2 Microflowers with Improved Charge‐Carrier Dynamics for Superior Photoelectrochemical Water Oxidation

“…A typical Z‐scheme photocatalytic system comprises two individual photocatalysts and a shuttle redox mediator (or electron mediator), such as graphene, nanocarbon, or a noble metal (Au, Ag, etc.) . However direct Z‐scheme photocatalysts (third‐generation Z‐scheme photocatalytic systems) do not require either liquid electron mediators or expensive noble‐metal electron mediators .…”

“…[9,10] One heterojunction strategy that has received considerable attentioni s the Z-schemep hotocatalytic system. [11,12,[13][14][15][16] The advantage of the Z-scheme approach over conventionalt ype-II heterojunctions is that, apart from its improved separation of photogenerated chargec arriers,t he Z-schemes ystem also places electrons in am ore-negative conduction band (CB) and holes in a more-positive valenceb and (VB), which endows the photogenerated electrons and holes with stronger reductiona nd oxidation ability,r espectively. [17,18] At ypical Z-scheme photocatalytic system comprises two individual photocatalystsa nd as huttle redox mediator (or electron mediator), such as graphene, nanocarbon, or an oble metal (Au, Ag, etc.).…”

“…[17,18] At ypical Z-scheme photocatalytic system comprises two individual photocatalystsa nd as huttle redox mediator (or electron mediator), such as graphene, nanocarbon, or an oble metal (Au, Ag, etc.). [11,[19][20][21] However direct Z-scheme photocatalysts (third-generation Z-scheme photocatalytic systems) do not require either liquid electron mediators or expensive noble-metal electron mediators. [22] Thus, the direct Z-scheme system has emerged as ap romising heterojunction system, in which components with favorable band positions form an intimateinterface between them.…”

Syntheses and Structural Analyses of New 3D Isostructural Zn(II) and Cd(II) Luminescent MOFs and their Application Towards Detection of Nitroaromatics in Aqueous Media

“…[11][12] Furthermore, improper disposal of TNP which is also used in leather, dye and glass industries causes water and soil pollutions. [13][14][15][16][17][18] Customary practices for explosive detection involve canines and sophisticated instruments those have serious concerns like portability and complex operations. [19][20][21][22][23][24] Hence, efficient and selective detection of TNP in variety of samples including explosive devices, soil, water and industrial effluents is a challenge of prime importance.…”

Z‐Scheme Photocatalytic Systems for Solar Water Splitting

“…As a result, this system demonstrates suitable band position for overall water splitting with strong reduction and oxidation abilities. In another similar study, a thin carbon layer was employed to interface 2D g‐C 3 N 4 nanosheets and ZnInS 4 (ZIS) to form a ternary nanocomposite with Z‐scheme electronic configuration 86. The resultant sample is able to perform photocatalytic H 2 evolution up to 50.32 µmol h −1 under Na 2 S/Na 2 SO 3 sacrificial condition.…”