ZnS photocatalysts
These nanoparticles were used as the electrode materials for an energy storage device such special for supercapacitor, and they displayed excellent qualities such an ultrahigh reversible specific capacitance of 824 F/g at 1 A/g, an impressive rate capability of 668.5 F/g at 3 A /g, and superb cycling stability.
Extensive research has been carried out on ZnS materials,
with numerous efforts made to investigate their chemical and physical
properties. Various synthetic methods, such as one-pot synthesis, sol-gel
formation, , hydrothermal techniques, and solid-state reactions, have been used
for preparation of ZnS-based materials. Additionally, modifications of ZnS-
based composites have been developed. Many approaches to ZnS-based solar cells
have also been presented. To achieve high efficiency of ZnS (Tian, Liu, Li, Li,
& Han, 2022).
ZnS was chosen as the target due to its outstanding chemical
stability against hydrolysis and oxidation at Nanoscale dimensions.
Additionally, the future hydrogen economy could be greatly aided by
ZnS-assisted photo catalytic degradation of contaminants and water splitting
employing cheap and environment friendly solar- hydrogen production. The
probable reaction pathways for the photocatalytic degradation of organic
pollutants and photocatalytic hydrogen evolution employing metal-doped ZnS
photocatalysts, as well as photocatalytic degradation of pollutants and water
splitting, are all discussed (Zagorac, Zagorac, Pejić, Matović, & Schön,
2022)..
ZnS is considered to have one of the most diverse morphologies at the Nanoscale among all inorganic semiconductors. The popular and simple synthetic methods such as hydrothermal, ultrasonic, and microwave irradiation methods, combined with recently discovered methodologies for synthesizing diverse ZnS nanostructures to tailor their morphology, size, and crystallinity. The article also discusses their use in photocatalytic degradation of organic pollutants and photocatalytic water splitting for hydrogen evolution.
Using metal-doped ZnS photocatalysts as an example, there
are potential reaction pathways for the oxidation of organic contaminants and
photocatalytic hydrogen evolution. Despite substantial advancements in this
area, there are still a number of major obstacles that must be addressed before
practical applications can be made. It is still difficult to produce hydrogen
from water splitting, and improving the conversion of solar energy into
hydrogen energy is a major challenge. A potential path to attaining this goal
is by the creation of effective and long-lasting photocatalysts for photo
electrochemical water splitting into H2 and O2. Therefore, the creation of ZnS
photocatalysts continues to be difficult for environmental cleanup and
renewable energy (Ramachandran et al., 2015).
In addition, recent developments in UV-light sensors,
chemical sensors (including gas sensors), biosensors, nanogenerators, field
effect transistors based on ZnS nanostructures, and the investigation of their
carrier properties, p-type conductivity, and catalytic activities are
discussed. Because of its superior optical qualities, ZnS may be utilized to
create high-quality windows and lenses that are transparent in the visible and
infrared spectrums. ZnS can be used as a host material for doping with
additional elements to produce semiconductors for LEDs and other optoelectronic
devices, including LEDs (Cumberland et al., 2002).
Significant advancements have been made in ZnS-based
nanostructure research over the past ten years, creating a substantial body of
knowledge and highlighting important difficulties. We anticipate that the
comprehensive analysis of the "synthesis-property-application"
triangle for ZnS nanostructures will spur additional research into resolving
current problems and create a great deal of interest in the general study of
inorganic semiconducting nanostructures (Yi, Li, Li, Luo, & Liu, 2019).
In this paper for synthesis a new type of piezoelectric
catalyst, MoOx/ZnS/ZnO (MZZ), is using in a one-step method. This composite
catalyst shows excellent piezoelectric catalytic activity for the degradation
of Rhodamine B (RhB) solution under ultrasonic vibration at 40 kHz. The optimal
sample showed a piezoelectric degradation rate of 0.054 min−1, which is 2.5
times higher than pure ZnO (Ummartyotin & Infahsaeng, 2016).
The study you mentioned focuses on the synthesis and
characterization of a new photocatalysts for water treatment using
photocatalytic technology. The N/Cu co- doped ZnS Nano sphere photocatalysts
was synthesized through a hydrothermal method, and its properties were
characterized through various methods.
The researchers found that doping the ZnS Nano sphere with N and Cu increased the specific surface area of the catalyst, exposed more ZnS (111) crystal planes, and narrowed the band gap, thus enhancing the absorption of visible light.
Specifically, the degradation rates of 2,4-DCP and TC were increased by 83.7 and 51 times, respectively, indicating the potential of this photocatalysts for the photocatalytic degradation of organic pollutants in wastewater. Overall, this study provides promising insights into the development of high- efficiency photocatalysts for water treatment, which could have significant implications for addressing the growing global water pollution problem (Lee & Wu, 2017).
