Highly efficient In2S3/WO3 photocatalysts: Z-scheme photocatalytic mechanism for enhanced photocatalytic water pollutant degradation under visible light irradiation

Qiu, Qingqing; Zhu, Peng; Liu, Yao; Lin, Yanhong

doi:10.1039/d0ra09315g

Cited by 30 publications

(7 citation statements)

References 49 publications

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“…QDs are semiconductors, considered QD materials with their volumetric footprint strictly restricted at the nanoscale, and are mostly prepared by thermal injection and lowtemperature solution methods. They have shown great application in solar cells [16,17], photocatalysis [18][19][20][21][22] and light-emitting diodes [23,24] in the past.…”

Section: Quantum Dot Materialsmentioning

confidence: 99%

Selection, Preparation and Application of Quantum Dots in Perovskite Solar Cells

Zhou

Yang

Luo

et al. 2022

IJMS

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As the third generation of new thin-film solar cells, perovskite solar cells (PSCs) have attracted much attention for their excellent photovoltaic performance. Today, PSCs have reported the highest photovoltaic conversion efficiency (PCE) of 25.5%, which is an encouraging value, very close to the highest PCE of the most widely used silicon-based solar cells. However, scholars have found that PSCs have problems of being easily decomposed under ultraviolet (UV) light, poor stability, energy level mismatch and severe hysteresis, which greatly limit their industrialization. As unique materials, quantum dots (QDs) have many excellent properties and have been widely used in PSCs to address the issues mentioned above. In this article, we describe the application of various QDs as additives in different layers of PSCs, as luminescent down-shifting materials, and directly as electron transport layers (ETL), light-absorbing layers and hole transport layers (HTL). The addition of QDs optimizes the energy level arrangement within the device, expands the range of light utilization, passivates defects on the surface of the perovskite film and promotes electron and hole transport, resulting in significant improvements in both PCE and stability. We summarize in detail the role of QDs in PSCs, analyze the perspective and associated issues of QDs in PSCs, and finally offer our insights into the future direction of development.

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Section: Quantum Dot Materialsmentioning

confidence: 99%

Selection, Preparation and Application of Quantum Dots in Perovskite Solar Cells

Zhou

Yang

Luo

et al. 2022

IJMS

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“…Even if timely energy conservation measures are taken, the world energy demand is expected to increase triple by 2050 [ 3 ]. In addition, the consumption of fossil fuels produces some nasty side effects, including air pollution and greenhouse effects [ 4 , 5 ]. Solar energy is a renewable clean energy [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Inverted Perovskite Solar Cells: Designing and Fabrication

Yang

Luo

Zhou

et al. 2022

IJMS

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Inverted perovskite solar cells (PSCs) have been extensively studied by reason of their negligible hysteresis effect, easy fabrication, flexible PSCs and good stability. The certified photoelectric conversion efficiency (PCE) achieved 23.5% owing to the formed lead−sulfur (Pb−S) bonds through the surface sulfidation process of perovskite film, which gradually approaches the performance of traditional upright structure PSCs and indicates their industrial application potential. However, the fabricated devices are severely affected by moisture, high temperature and ultraviolet light due to the application of organic materials. Depending on nitrogen, cost of protection may increase, especially for the industrial production in the future. In addition, the inverted PSCs are found with a series of issues compared with the traditional upright PSCs, such as nonradiative recombination of carriers, inferior stability and costly charge transport materials. Thus, the development of inverted PSCs is systematically reviewed in this paper. The design and fabrication of charge transport materials and perovskite materials, enhancement strategies (e.g., interface modification and doping) and the development of all−inorganic inverted devices are discussed to present the indicator for development of efficient and stable inverted PSCs.

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“…Usually semiconductors including titanium oxide (TiO2), zinc oxide (ZnO), iron (III) oxide (Fe2O3), zinc sulfide (ZnS), zirconium oxide (ZrO2), cadmium sulfide (CdS), among others, are selected as photocatalysts due to their narrow bandgap and electronic structure [12,13]. Semiconductors are materials that have an unoccupied conduction band and an occupied valence band, intermediate to that shown by conductors and insulators [14]. In semiconductor photocatalysis, electrons from the valence band (VB) are excited to the conduction band (CB) by light of higher energy than the respective bandgap of the semiconductor [14].…”

Section: Introductionmentioning

confidence: 99%

“…Semiconductors are materials that have an unoccupied conduction band and an occupied valence band, intermediate to that shown by conductors and insulators [14]. In semiconductor photocatalysis, electrons from the valence band (VB) are excited to the conduction band (CB) by light of higher energy than the respective bandgap of the semiconductor [14]. This migration results in the formation of electron-hole pair (ecb / h + vb) [15].…”

Section: Introductionmentioning

confidence: 99%

Biomimetic Catalysts Based on Au@TiO2-MoS2-CeO2 Composites for the Production of Hydrogen by Water Splitting

Fontánez¹,

García²,

Ortiz³

et al. 2022

Preprint

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The photocatalytic hydrogen evolution reaction (HER) by water splitting has been studied, using catalysts based on TiO2 nanowires (TiO2NWs), which were synthesized by a hydrothermal procedure. This nanomaterial was subsequently modified by incorporating different loadings of gold nanoparticles (AuNPs) on the surface, previously exfoliated MoS2 nanosheets, and CeO2 nanoparticles (CeO2NPs). These nanomaterials, as well as the different synthesized catalysts, were characterized by electron microscopy (HR-SEM and HR-TEM), XPS, XRD, Raman, Reflectance and BET surface area. HER studies were performed in aqueous solution, under irradiation at different wavelengths, which were selected through the appropriate use of optical filters. The results obtained show that there is a synergistic effect between the different nanomaterials of the catalysts. The specific area of the catalyst, and especially the increased loading of MoS2 and CeO2NPs in the catalyst substantially improved the H2 production. Recyclability studies showed only a decrease in activity of approx. 7% after 15 cycles of use, which opens many possibilities regarding the potential use and scaling of these heterostructures in photocatalytic production of H2 from water.

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Highly efficient In₂S₃/WO₃ photocatalysts: Z-scheme photocatalytic mechanism for enhanced photocatalytic water pollutant degradation under visible light irradiation

Abstract: A Z-scheme system In2S3/WO3 heterojunction was fabricated via a mild hydrothermal method and further applied for photocatalytic degradation of tetracycline (TCH) and Rhodamine B (Rh B) under visible light irradiation.

Cited by 30 publications

References 49 publications

Selection, Preparation and Application of Quantum Dots in Perovskite Solar Cells

Selection, Preparation and Application of Quantum Dots in Perovskite Solar Cells

Recent Advances in Inverted Perovskite Solar Cells: Designing and Fabrication

Biomimetic Catalysts Based on Au@TiO2-MoS2-CeO2 Composites for the Production of Hydrogen by Water Splitting

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