Size- and shape-controlled synthesis of ZnIn2S4 nanocrystals with high photocatalytic performance

Peng, Shengjie; Li, Linlin; Wu, Yongzhi; Lin, Jia; Tian, Lingling; Srinivasan, Madhavi; Ramakrishna, Seeram; Yan, Q. L.; Mhaisalkar, Subodh

doi:10.1039/c2ce26593a

Cited by 92 publications

(82 citation statements)

References 42 publications

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“…[25] These results indicate that there are strong interactions between the ZnIn 2 S 4 nanosheets and the MoS 2 slices in the composite, driven by the probable electron transfer and delocalization of firmly contacted MoS 2 layers and ZnIn 2 S 4 nanosheets. [11,25] Figure 5 shows UV/Vis absorption spectra of ZnIn 2 S 4 and the MoS 2 /ZnIn 2 S 4 composites with various MoS 2 content. For the pure ZnIn 2 S 4 nanosheets, a significant absorption at l > 400 nm was found.…”

Section: Resultsmentioning

confidence: 81%

Enhanced Photocatalytic Hydrogen Evolution over Hierarchical Composites of ZnIn₂S₄ Nanosheets Grown on MoS₂ Slices

Tian

Chen

Ren

et al. 2014

Chemistry An Asian Journal

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A highly active hierarchical MoS2/ZnIn2S4 composite catalyst was synthesized in situ by using a facile controlled-growth approach through a solvothermal process. During the solvothermal reaction, 2D ultrathin curled ZnIn2S4 nanosheets grew on the surface of MoS2 slices, which could help to form a more-homogeneous mixture, effective interfacial contact, and strong interactions between the ZnIn2S4 nanosheets and the MoS2 slices. The intimate contact between ZnIn2S4 and MoS2 favored the formation of junctions between the two components, thereby improving the charge separation and prolonging the mean lifetime of the electron-hole pairs. Moreover, growing ZnIn2S4 nanosheets by visible-light catalysis on MoS2 slices afforded a higher number of available catalytically active sites. So, the photocatalytic hydrogen-evolution performance of the hierarchical MoS2/ZnIn2S4 composite was significantly enhanced, owing to a synergistic effect of these factors. This work could provide new insights into the fabrication of a highly efficient and low-cost non-noble-metal co-catalyst for visible-light H2 generation.

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Section: Resultsmentioning

confidence: 81%

Enhanced Photocatalytic Hydrogen Evolution over Hierarchical Composites of ZnIn₂S₄ Nanosheets Grown on MoS₂ Slices

Tian

Chen

Ren

et al. 2014

Chemistry An Asian Journal

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“…These results indicate that the chemical states of Ag, Cd and Zn are in the form of Ag + , Cd 2+ and Zn 2+ . 28,29 The UV−vis−NIR diffuse reflectance spectra of our ZIS, DIS and AIS MMS (SI Figure S3), all show adsorption cutoffs longer than 400 nm and extend longer than 800 nm, suggesting these materials are responsive to visible light or near-infrared light. These spectra also clearly indicate that the chemical compositions of each MMS had a large effect on absorption properties.…”

Section: ■ Results and Discussionmentioning

confidence: 97%

Composition Directed Generation of Reactive Oxygen Species in Irradiated Mixed Metal Sulfides Correlated with Their Photocatalytic Activities

Jia

Yang

et al. 2015

ACS Appl. Mater. Interfaces

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The ability of nanostructures to facilitate the generation of reactive oxygen species and charge carriers underlies many of their chemical and biological activities. Elucidating which factors are essential and how these influence the production of various active intermediates is fundamental to understanding potential applications of these nanostructures, as well as potential risks. Using electron spin resonance spectroscopy coupled with spin trapping and spin labeling techniques, we assessed 3 mixed metal sulfides of varying compositions for their abilities to generate reactive oxygen species, photogenerate electrons, and consume oxygen during photoirradiation. We found these irradiated mixed metal sulfides exhibited composition dependent generation of ROS: ZnIn2S4 can generate (•)OH, O2(-•) and (1)O2; CdIn2S4 can produce O2(-•) and (1)O2, while AgInS2 only produces O2(-•). Our characterizations of the reactivity of the photogenerated electrons and consumption of dissolved oxygen, performed using spin labeling, showed the same trend in activity: ZnIn2S4 > CdIn2S4 > AgInS2. These intrinsic abilities to generate ROS and the reactivity of charge carriers correlated closely with the photocatalytic degradation and photoassisted antibacterial activities of these nanomaterials.

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“…NCs with different shapes and sizes, [23][24]27,29 we followed a slight variation of the procedure reported by K. H. Park et al, 30 to obtain In2S3 NCs with a two-dimensional disk-like morphology. The difference between the synthesis procedure reported by K. H. Park et al and ours is that we used an injection step instead of a heating up procedure, since the latter led to a broader size-distribution in our hands ( Figure S1 Surface modification with PTA: The procedure used to replace native organic ligands with PTA was based on previous work by J. Huang et al 31 Briefly, 1 mL of a 10 mg/mL dispersion of In2S3 NCs in hexane was mixed with 1 mL of a MFA solution that contained 20 mL of TFA and 50 mg (0.0173 mmols) of PTA.…”

Section: Synthesis Of In2s3 Ncs: Among the Several Established Synthementioning

confidence: 99%

“…18 Following this approach, gels of different metal chalcogenides have been produced. [19][20][21] In2S3 is an n-type semiconductor (2.6 eV band gap) with large exciton Bohr radius of 33.8 nm 22 used in lithium-ion batteries, 23 as photodetector, 24 for solar energy conversion through photocatalysis, [25][26][27] and particularly as a host material for two-photon absorption processes 4 through an intermediate band. [28][29] While its chemical stability, low defect density, simple synthesis, and proper band gap makes it an excellent candidate for photocatalytic applications, this material is yet underexplored in this area.…”

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confidence: 99%

Surface Chemistry and Nano-/Microstructure Engineering on Photocatalytic In₂S₃ Nanocrystals

et al. 2018

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Colloidal nanocrystals (NCs) compete with molecular catalysts in the field of homogenous catalysis, offering easier recyclability and a number of potentially advantageous functionalities, such as tunable band gaps, plasmonic properties, or a magnetic moment. Using high-throughput printing technologies, colloidal NCs can also be supported onto substrates to produce cost-effective electronic, optoelectronic, electrocatalytic, and sensing devices. For both catalytic and technological application, NC surface chemistry and supracrystal organization are key parameters determining final performance. Here, we study the influence of the surface ligands and the NC organization on the catalytic properties of InS, both as a colloid and as a supported layer. As a colloid, NCs stabilized by inorganic ligands show the highest photocatalytic activities, which we associate with their large and more accessible surfaces. On the other hand, when NCs are supported on a substrate, their organization becomes an essential parameter determining performance. For instance, NC-based films produced through a gelation process provided five-fold higher photocurrent densities than those obtained from dense films produced by the direct printing of NCs.

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Size- and shape-controlled synthesis of ZnIn2S4 nanocrystals with high photocatalytic performance

Cited by 92 publications

References 42 publications

Enhanced Photocatalytic Hydrogen Evolution over Hierarchical Composites of ZnIn₂S₄ Nanosheets Grown on MoS₂ Slices

Enhanced Photocatalytic Hydrogen Evolution over Hierarchical Composites of ZnIn₂S₄ Nanosheets Grown on MoS₂ Slices

Composition Directed Generation of Reactive Oxygen Species in Irradiated Mixed Metal Sulfides Correlated with Their Photocatalytic Activities

Surface Chemistry and Nano-/Microstructure Engineering on Photocatalytic In₂S₃ Nanocrystals

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Size- and shape-controlled synthesis of ZnIn2S4 nanocrystals with high photocatalytic performance

Cited by 92 publications

References 42 publications

Enhanced Photocatalytic Hydrogen Evolution over Hierarchical Composites of ZnIn2S4 Nanosheets Grown on MoS2 Slices

Enhanced Photocatalytic Hydrogen Evolution over Hierarchical Composites of ZnIn2S4 Nanosheets Grown on MoS2 Slices

Composition Directed Generation of Reactive Oxygen Species in Irradiated Mixed Metal Sulfides Correlated with Their Photocatalytic Activities

Surface Chemistry and Nano-/Microstructure Engineering on Photocatalytic In2S3 Nanocrystals

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Enhanced Photocatalytic Hydrogen Evolution over Hierarchical Composites of ZnIn₂S₄ Nanosheets Grown on MoS₂ Slices

Enhanced Photocatalytic Hydrogen Evolution over Hierarchical Composites of ZnIn₂S₄ Nanosheets Grown on MoS₂ Slices

Surface Chemistry and Nano-/Microstructure Engineering on Photocatalytic In₂S₃ Nanocrystals