Constructing noble-metal-free Z-scheme photocatalytic overall water splitting systems using MoS₂ nanosheet modified CdS as a H₂ evolution photocatalyst

Abstract

A noble-metal-free Z-scheme system was constructed for photocatalytic overall splitting.

Ultrathin Two‐Dimensional Semiconductors for Photocatalysis in Energy and Environment Applications

“…However, not all the semiconductors can meet the band structure requirements of photocatalytic over‐all water splitting. The emergence of 2D semiconductors with special advantages has brought a turn for the photocatalytic over‐all water splitting . For example, Zhu and coworkers constructed a new artificial BP/BiVO 4 Z‐scheme photocatalytic system that can be applied in overall pure‐water splitting without any sacrificial agents and external bias under visible light irradiation.…”

RuII Photosensitizer‐Functionalized Two‐Dimensional MoS2 for Light‐Driven Hydrogen Evolution

“…One strategy to circumvent this is to combine photo‐absorbers with MoS 2 . Recent studies have shown that MoS 2 has been combined with semiconductor‐based light absorbers such as Si, organic, and inorganic dyes for photoelectrochemical HER . However, all of these systems lacked a linkage/tether between the dye and the MoS 2 HER catalyst, and were simply formed by mixing/physisorption, thus limiting the electronic communications between dye and catalyst, and thus inhibiting the light‐driven HER efficiency.…”

Insights Into Highly Improved Solar-Driven Photocatalytic Oxygen Evolution Over Integrated Ag3PO4/MoS2 Heterostructures

“…The past decades have witnessed the use of molybdenum disulfide (MoS 2 ), a 2D lamellar material with excellent conductive property, as electrocatalysts and photocatalysts for applications in electrochemical and solar-to-fuel conversion (Xiang et al, 2012; Dai et al, 2017; Yang et al, 2017). It was confirmed that the combination of MoS 2 with functional semiconductors enabled obvious enhancements in both photocatalytic and electrocatalytic hydrogen production activity (Sun et al, 2016; Zhang et al, 2016; Iqbal et al, 2017; Yuan et al, 2017). The hybridization of MoS 2 with Ag 3 PO 4 to produce MoS 2 /Ag 3 PO 4 composite materials has been primarily explored, however the application is restricted to the photodegradation of different kinds of organic pollutants (Wang L. et al, 2015; Wang P. F. et al, 2015; Gyawali and Lee, 2016; Li et al, 2016; Zhu et al, 2016; Wan et al, 2017), the employment of MoS 2 /Ag 3 PO 4 nanocomposites as photocatalysts for solar-light-driven oxygen evolution from water splitting has not yet been explored.…”