Engineering dual charge transfer material modified Zn_xCd_1−xS towards highly effective photocatalytic pure water splitting

Abstract

Facilitating the efficient separation of charge carriers is vitally crucial to achieving highly effective photocatalytic intermediate water splitting without any sacrifice reagent in pure water. Herein, the directional modulation separation...

Enhanced Photocatalytic Hydrogen Evolution over Twin-Crystal ZnCdS with Sulfur Vacancies Prepared by High-Gravity Technology

“…8−10 Many current studies already show that Zn 0.5 Cd 0.5 S obtained when the molar ratio of Zn to Cd is 1:1 usually has the best photocatalytic activity. 11,12 Competition between microsecond-to-millisecond interfacial reaction kinetics and picosecond-to-nanosecond electron−hole complexation processes is key to solar-to-hydrogen energy conversion efficiency. 13,14 Therefore, to prolong the lifetime of photogenerated carriers in Zn 0.5 Cd 0.5 S and to effectively utilize the carriers so as to obtain higher photocatalytic activity, researchers have made great efforts in the areas of crystalline phase modulation, defect engineering, and morphology modulation.…”

“…Hydrogen energy is considered an ideal clean energy source due to its numerous advantages, including high-quality energy density, diverse application paths, and zero carbon emissions . Therefore, accelerating the development and utilization of hydrogen energy is a crucial pathway toward achieving carbon emission peak and carbon-neutral goals. , In the current hydrogen production technology, there is generally high energy consumption, high carbon emissions, and dependence on fossil energy, which seriously constrain its practical applications. , Photocatalytic hydrogen evolution via water splitting is a green hydrogen production technology that can convert solar energy into hydrogen energy without emitting any pollutants during the whole process, is a sustainable and promising technology, the key lies in the development and preparation is efficient photocatalysts. , Among the various photocatalysts, Zn x Cd 1– x S solid solution has attracted attention due to its tunable energy band structure, more negative conduction band position, visible light responsiveness, and excellent photocatalytic activity compared to CdS and ZnS. − Many current studies already show that Zn 0.5 Cd 0.5 S obtained when the molar ratio of Zn to Cd is 1:1 usually has the best photocatalytic activity. , …”

CoP decorated 2D/2D red phosphorus/B doped g-C3N4 type II heterojunction for boosted pure water splitting activity via the two-electron pathway

“…[13][14][15][16] Recent research suggests that CN exhibits an attractive capacity of photocatalytic pure water splitting to H 2 and H 2 O 2 even without catalytic metals. [17][18][19][20] However, the photocatalytic activity of CN is still limited by a few drawbacks: (1) the high recombination rate of charge carriers caused by intrinsic low conductivity for photogenerated electrons, (2) limited light absorption capacity (λ < 460 nm), and (3) unsatisfactory ability for adsorption and activation of H 2 O. [21][22][23] Therefore, tremendous efforts have been devoted to overcoming any of the three drawbacks for elevating the water splitting efficiency of CN.…”

Hierarchical CdS/Ni3S4/Ni2P@C Photocatalyst for Efficient H2 Evolution under Visible-Light Irradiation

“…A NiMnO 3 /Ni 3 S 4 p–n composite has been proven to be highly efficient and stable in photocatalytic HER . In addition, MOF-derived carbon materials with high conductivity and low reduction potential could be used as effective electron acceptors to improve the separation efficiency of electron–hole pairs. , Despite these advances, codecorating Ni 3 S 4 and Ni 2 P on MOF-derived carbon materials with high surface areas for improving photocatalytic HER of semiconductors (especially CdS) merits investigation.…”