TiO2 nanoparticles modified with 2D MoSe2 for enhanced photocatalytic activity on hydrogen evolution

Wu, Lulu; Shi, Shuai; Li, Qiaodan; Zhang, Xiaoyan; Cui, Xiaoli

doi:10.1016/j.ijhydene.2018.10.214

Cited by 64 publications

(25 citation statements)

References 48 publications

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“…Figure presents (a) a high‐resolution TEM image of CIGS/MoSe 2 /Mo stacked layer, and lattice images of the (b) MoSe 2 /Mo and (c) CIGS/MoSe 2 interfaces. The observed spacings of 0.32, 0.22, and 0.64 nm agree well with those of the Cu(In 0.7 ,Ga 0.3 )Se 2 {112}, Mo{110}, and half of the MoSe 2 {0001}planes, respectively . Therefore, it can be concluded that the MoSe 2 {0001} and Cu(In 0.7 ,Ga 0.3 )Se 2 {112}planes grew epitaxially parallel to the Mo{110} and MoSe 2 {0001} planes, respectively.…”

Section: Resultssupporting

confidence: 68%

Epitaxial Cu(In,Ga)Se₂ Thin Films on Mo Back Contact for Solar Cells

Ando

Khatri

Matsumori

et al. 2019

Physica Status Solidi (a)

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Single crystal Mo thin films are successfully grown on single-crystal sapphire {0001} substrates using a newly developed two-step sputtering method. Cu(In 1-x ,Ga x )Se 2 (CIGS) thin films are then epitaxially grown on the Mo thin films by three-stage co-evaporation. Following that, a CdS buffer layer is deposited on the epitaxial (epi)-CIGS thin films by a chemical bath deposition (CBD) method, leading to the overall epitaxial relations such as CdS{111}// CIGS{112}//MoSe 2 {0001}//Mo{110}//sapphire {0001}. The Cd-diffusion into the CIGS occurs to approximately 30 nm from the CIGS/CdS interface boundary together with depleted Cu at the CIGS surface region. This suggests that Cd diffuses through Cu vacancies in the intra-grain rather than at the grain boundaries. Two distinct solar cells are fabricated using epi-and polycrystalline (poly)-CIGS thin films deposited on sapphire substrates in the same deposition run. The open-circuit-voltage (V OC ) of epi-CIGS solar cell is found to be higher than poly-CIGS solar cell. The net carrier concentration (N CV ) derived from the capacitance-voltage (C-V) measurements of epi-CIGS solar cell is 3.5 times higher than poly-CIGS solar cell, suggesting one of the causes of higher V OC . This large difference in the N CV is discussed based on the results of low-temperature photoluminescence measurements.

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Section: Resultssupporting

confidence: 68%

Epitaxial Cu(In,Ga)Se₂ Thin Films on Mo Back Contact for Solar Cells

Ando

Khatri

Matsumori

et al. 2019

Physica Status Solidi (a)

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“…The H 2 evolution performance of UMS incorporated a-Fe 2 O 3 /ZnO nanocomposite is also better than that of other analogous metal oxide and TMDs based photocatalyst nanocomposites reported in literature using similar experimental conditions. 46,47 To better understand the H 2 generation performance level of this nanocomposite, we have provided a comparison between our work and previously reported investigations in ESI Table S2. † As shown in the Table S2, † a previous investigation has demonstrated that about 190 mmol H 2 can be produced by employing MoS 2 /RGO nanohybrid cocatalyst under 4 hours of irradiation.…”

Section: Photocatalytic Hydrogen Generationmentioning

confidence: 99%

MoS₂ nanosheet incorporated α-Fe₂O₃/ZnO nanocomposite with enhanced photocatalytic dye degradation and hydrogen production ability

et al. 2019

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“…The involvement of formed ROS into reaction mechanisms for OTC degradation was confirmed by scavenging tests using TB, AO, and BQ. Molybdenum disulfide (MoS 2 ), a two-dimensional (2D) layered metal chalcogenide with an indirect band gap of 1.1 eV and 1.9 eV direct band gap in monolayered form, with unique structure, low-cost, high thermal stability, and electrostatic integrity, is also a suitable candidate for forming heterojunction with TiO 2 (Type II Heterojunction) [61][62][63]. Hence, Kumar et al [64] reported its application in the photocatalytic degradation of paracetamol.…”

Section: Coupling Of Tio 2 With Metal Sulfidesmentioning

confidence: 99%

Recent Achievements in Development of TiO2-Based Composite Photocatalytic Materials for Solar Driven Water Purification and Water Splitting

et al. 2020

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Clean water and the increased use of renewable energy are considered to be two of the main goals in the effort to achieve a sustainable living environment. The fulfillment of these goals may include the use of solar-driven photocatalytic processes that are found to be quite effective in water purification, as well as hydrogen generation. H2 production by water splitting and photocatalytic degradation of organic pollutants in water both rely on the formation of electron/hole (e−/h+) pairs at a semiconducting material upon its excitation by light with sufficient photon energy. Most of the photocatalytic studies involve the use of TiO2 and well-suited model compounds, either as sacrificial agents or pollutants. However, the wider application of this technology requires the harvesting of a broader spectrum of solar irradiation and the suppression of the recombination of photogenerated charge carriers. These limitations can be overcome by the use of different strategies, among which the focus is put on the creation of heterojunctions with another narrow bandgap semiconductor, which can provide high response in the visible light region. In this review paper, we report the most recent advances in the application of TiO2 based heterojunction (semiconductor-semiconductor) composites for photocatalytic water treatment and water splitting. This review article is subdivided into two major parts, namely Photocatalytic water treatment and Photocatalytic water splitting, to give a thorough examination of all achieved progress. The first part provides an overview on photocatalytic degradation mechanism principles, followed by the most recent applications for photocatalytic degradation and mineralization of contaminants of emerging concern (CEC), such as pharmaceuticals and pesticides with a critical insight into removal mechanism, while the second part focuses on fabrication of TiO2-based heterojunctions with carbon-based materials, transition metal oxides, transition metal chalcogenides, and multiple composites that were made of three or more semiconductor materials for photocatalytic water splitting.

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TiO2 nanoparticles modified with 2D MoSe2 for enhanced photocatalytic activity on hydrogen evolution

Cited by 64 publications

References 48 publications

Epitaxial Cu(In,Ga)Se₂ Thin Films on Mo Back Contact for Solar Cells

Epitaxial Cu(In,Ga)Se₂ Thin Films on Mo Back Contact for Solar Cells

MoS₂ nanosheet incorporated α-Fe₂O₃/ZnO nanocomposite with enhanced photocatalytic dye degradation and hydrogen production ability

Recent Achievements in Development of TiO2-Based Composite Photocatalytic Materials for Solar Driven Water Purification and Water Splitting

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TiO2 nanoparticles modified with 2D MoSe2 for enhanced photocatalytic activity on hydrogen evolution

Cited by 64 publications

References 48 publications

Epitaxial Cu(In,Ga)Se2 Thin Films on Mo Back Contact for Solar Cells

Epitaxial Cu(In,Ga)Se2 Thin Films on Mo Back Contact for Solar Cells

MoS2 nanosheet incorporated α-Fe2O3/ZnO nanocomposite with enhanced photocatalytic dye degradation and hydrogen production ability

Recent Achievements in Development of TiO2-Based Composite Photocatalytic Materials for Solar Driven Water Purification and Water Splitting

Contact Info

Product

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Epitaxial Cu(In,Ga)Se₂ Thin Films on Mo Back Contact for Solar Cells

Epitaxial Cu(In,Ga)Se₂ Thin Films on Mo Back Contact for Solar Cells

MoS₂ nanosheet incorporated α-Fe₂O₃/ZnO nanocomposite with enhanced photocatalytic dye degradation and hydrogen production ability