Visible‐Light‐Induced Generation of H2 by Nanocomposites of Few‐Layer TiS2 and TaS2 with CdS Nanoparticles

Gupta, Uma; Rao, Bolla Govinda; Maitra, Urmimala; Prasad, Belavalli E.; Rao, C. N. R.

doi:10.1002/asia.201301537

Cited by 46 publications

(26 citation statements)

References 36 publications

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“…Because 1T-and 2H-MoS 2 are metallic and semiconducting, respectively, their heterojunctions represent a chemically homogeneous layer with possible use in molecular electronic devices. Li intercalation and exfoliation have been used to generate single layers of several other TMDs like MoSe 2 (29), TaS 2 (30,31), and TiS 2 (31). Whereas MoS 2 and MoSe 2 undergo transition from the 2H phase to the 1T phase upon Li intercalation, TaS 2 undergoes the reverse transition, from the 1T phase to the 2H phase (30).…”

Section: Metal Chalcogenidesmentioning

confidence: 99%

Inorganic Graphene Analogs

Rao

Maitra

2015

Annu. Rev. Mater. Res.

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In the last four to five years, there has been a great resurgence of research on two-dimensional inorganic materials, partly because of the impetus received from graphene research. Unlike graphene, which is a gap-less material, most inorganic layered materials are semiconductors or insulators. Some of them, as exemplified by MoS 2 , exhibit unexpected properties, not unlike graphene, with possible applications. Thus, layered metal chalcogenides are being explored intensely, and MoS 2 is emerging as a wonder material. In this article, we present the synthesis and properties of nanosheets composing single or few layers of these fascinating materials. Besides metal chalcogenides, boron nitride, borocarbonitrides (B x C y N z ), metal oxides, and metal-organic frameworks are also discussed.

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Section: Metal Chalcogenidesmentioning

confidence: 99%

Inorganic Graphene Analogs

Rao

Maitra

2015

Annu. Rev. Mater. Res.

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“…1T forms of other metallic transition metal sulfides like TaS 2 and TiS 2 have earlier been shown to be active co-catalysts for H 2 evolution. 30 However, the activity for H 2 evolution is much lower in these chalcogenides as compared to 1T-MoS 2 21 and 1T-MoSe 2 . Greater stability afforded by the extra electron to Mo 4d level by inducing a half-filled configuration of d yx , d zx , d zy , as compared to Ta 5d (with 1 electron) and Ti 3d (with no electron) is probably the reason for higher activity of 1T-MoS 2 and 1T-MoSe 2 .…”

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confidence: 98%

Characterization of few-layer 1T-MoSe2 and its superior performance in the visible-light induced hydrogen evolution reaction

et al. 2014

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Based on earlier results on the photocatalytic properties of MoS2, the 1T form of MoSe2, prepared by lithium intercalation and exfoliation of bulk MoSe2, has been employed for the visible-light induced generation of hydrogen. 1T-MoSe2 is found to be superior to both 2H and 1T MoS2 as well as 2H-MoSe2 in producing hydrogen from water, the yield being in the 60–75 mmol h−1 g−1 range with a turn over frequency of 15–19 h−1. First principles calculations reveal that 1T-MoSe2 has a lower work function than 2H-MoSe2 as well as 1T and 2H-MoS2, making it easier to transfer an electron from 1T-MoSe2 for the production of H2.

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“…[35] and (f ) adapted with permission from Eda et al [36]. [34] have been obtained through this method. An important aspect of this route is the transformation of the thermodynamically stable semiconducting 2H phase of Mo(S,Se) 2 and W(S,Se) 2 into metastable metallic 1T phases [9].…”

Section: Synthesis and Characterizationmentioning

confidence: 99%

Two-dimensional inorganic analogues of graphene: transition metal dichalcogenides

Jana¹,

Rao²

2016

Phil. Trans. R. Soc. A.

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The discovery of graphene marks a major event in the physics and chemistry of materials. The amazing properties of this two-dimensional (2D) material have prompted research on other 2D layered materials, of which layered transition metal dichalcogenides (TMDCs) are important members. Single-layer and few-layer TMDCs have been synthesized and characterized. They possess a wide range of properties many of which have not been known hitherto. A typical example of such materials is MoS 2 . In this article, we briefly present various aspects of layered analogues of graphene as exemplified by TMDCs. The discussion includes not only synthesis and characterization, but also various properties and phenomena exhibited by the TMDCs.This article is part of the themed issue 'Fullerenes: past, present and future, celebrating the 30th anniversary of Buckminster Fullerene'.

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Visible‐Light‐Induced Generation of H₂ by Nanocomposites of Few‐Layer TiS₂ and TaS₂ with CdS Nanoparticles

Cited by 46 publications

References 36 publications

Inorganic Graphene Analogs

Inorganic Graphene Analogs

Characterization of few-layer 1T-MoSe2 and its superior performance in the visible-light induced hydrogen evolution reaction

Two-dimensional inorganic analogues of graphene: transition metal dichalcogenides

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