From UV to Near‐Infrared, WS<sub>2</sub> Nanosheet: A Novel Photocatalyst for Full Solar Light Spectrum Photodegradation

Sang, Yuanhua; Zhao, Zhenhuan; Zhao, Mingwen; Hao, Pin; Leng, Yanhua; Liu, Hong

doi:10.1002/adma.201403264

Cited by 520 publications

(291 citation statements)

References 49 publications

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“…Compared to other conventional therapeutic techniques, PTT boasts many merits such as the simplicity, minimal invasiveness, low incidence of complications, as well as the high spatial and temporal precision of NIR light 8, 9, 10, 11. Various types of nanoagents have been explored to attain better PTT performance12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 and in the treatment, intravenous injection of the nanoagents (to mice, for example) is followed by high‐power NIR laser irradiation for ablation 25, 26, 27, 28, 29.…”

Section: Introductionmentioning

confidence: 99%

Black‐Phosphorus‐Incorporated Hydrogel as a Sprayable and Biodegradable Photothermal Platform for Postsurgical Treatment of Cancer

et al. 2018

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Photothermal therapy (PTT) is a fledgling therapeutic strategy for cancer treatment with minimal invasiveness but clinical adoption has been stifled by concerns such as insufficient biodegradability of the PTT agents and lack of an efficient delivery system. Here, black phosphorus (BP) nanosheets are incorporated with a thermosensitive hydrogel [poly(d,l‐lactide)‐poly(ethylene glycol)‐poly(d,l‐lactide) (PDLLA‐PEG‐PDLLA: PLEL)] to produce a new PTT system for postoperative treatment of cancer. The BP@PLEL hydrogel exhibits excellent near infrared (NIR) photothermal performance and a rapid NIR‐induced sol–gel transition as well as good biodegradability and biocompatibility in vitro and in vivo. Based on these merits, an in vivo PTT postoperative treatment strategy is established. Under NIR irradiation, the sprayed BP@PLEL hydrogel enables rapid gelation forming a gelled membrane on wounds and offers high PTT efficacy to eliminate residual tumor tissues after tumor removal surgery. Furthermore, the good photothermal antibacterial performance prevents infection and this efficient and biodegradable PTT system is very promising in postoperative treatment of cancer.

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Section: Introductionmentioning

confidence: 99%

Black‐Phosphorus‐Incorporated Hydrogel as a Sprayable and Biodegradable Photothermal Platform for Postsurgical Treatment of Cancer

et al. 2018

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“…To date, nanosheets have been used in many such applications, mainly in the electrochemical arena, in areas from photocatalysis 15 to proton transport membranes. 16 A range of 2D materials including graphene and MoS2 have been used in electrochemical energy storage applications, 9,17 typically as electrodes in batteries [18][19][20] and supercapacitors 21,22 .…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Applications of Two-Dimensional Nanosheets: The Effect of Nanosheet Length and Thickness

et al. 2016

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Although many electrochemical properties of 2D materials depend sensitively on the nanosheet dimensions, there are no systematic, quantitative studies which analyse the effect of nanosheet size and thickness on electrochemical parameters. Here we use size-selected WS2 nanosheets as a model system to determine the effect of nanosheet dimensions in two representative areas -hydrogen evolution electrocatalytic electrodes and electrochemical double layer capacitor electrodes. We chose these applications as they depend on the interaction of ions with the nanosheet edge and basal plane, respectively, and so would be expected to be nanosheet-size-dependent. The data shows the catalytic current density to scale inversely with mean nanosheet length while the volumetric double layer capacitance scales inversely with mean nanosheet thickness. Both of these results are consistent with simple models allowing use to extract intrinsic quantities, namely the turnover frequency and the double layer thickness respectively.3

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“…[1][2][3] Degrading and removing harmful compounds into CO 2 and H 2 O using semiconductor-based photocatalysts had proven to be effi cient and ideal green technologies in water treatment. [ 4,5 ] Among the photocatalysts, bismuth oxyhalides have become more and more important in the fi eld of photocatalysis due to their electrical properties and outstanding optical.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Photocatalytic Performance of BiOCl_xI_1−x by Introducing Surface Disorders and Bi Nanoparticles as Cocatalyst

Huang

Long

et al. 2015

Adv Materials Inter

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The interleaved layer structure between positive [Bi 2 O 2 ] 2+ slabs and negative iodide slabs builds spontaneously internal static electric fi elds, which can induce the effective separation of photogenerated electron-hole pairs. [9][10][11] However, the reported photocatalytic effi ciencies of pure bismuth oxyhalides are notoriously low for practical use.In order to improve the photocatalytic performance of bismuth oxyhalides, many modifi ed approaches which had been applied in TiO 2 system such as microstructure modulation, [ 10,12 ] hybridization with other material, [13][14][15] and structural design, [16][17][18] were used to enhance the solar light harvesting and charge separation. The synthesis and modifi cation of Bi-based semiconductor photocatalysts has attracted intense research interest. Recently, several photo catalysts with Bi element deposited have been reported, such as Bi/BiOCl, [ 19,20 ] Bi/Bi 2 O 3 , [ 21 ] and Bi/BiOI. [ 22 ] These nanocomposite photocatalysts show superior photocatalytic performance in comparison with their separate components due to the existence of Bi metal, where it may enhance light absorption, charge separation effi ciency, and the charge transfer rate. [ 23 ] Bismuth possesses a highly anisotropic Fermi surface, low carrier density, and a long carrier mean free path due to a very small band gap. [ 19 ] Therefore, hybridization with Bi can signifi cantly improve the photocatalytic performance of Bi-based semiconductor.On the other hand, designing materials with some defects in their structure will also improve their photocatalytic performance, which has become an attractive fi eld. It had been found that surface disorders have a signifi cant effect on their electronic band structures and option absorption. [16][17][18] Recent reports have shown that surface disorders could act as electron scavengers delaying electron-hole pair recombination, which could improve the separation effi ciency of the photogenerated electrons and holes. For example, our previous work showed that the oxygen vacancies have a critical effect on the donor density and option absorption, which signifi cantly improved photocatalytic performance. [ 24 ] However, up till date, there is no report about the combination of Bi cocatalyst and surface disorders to improve the photocatalytic performance of bismuth oxyhalides for the removal of phenol.Nonmetal doping is another approach to modify the band structure of bismuth oxyhalides, which can improve the Photocatalysis has emerged as a promising method for industrial sewage elimination. The main bottleneck of this process is the development of an effi cient, stable, and cost-effective catalyst that can oxidize pollution under visible light. Herein, surface disorders and Bi nanoparticles are successfully introduced into BiOCl x I 1− x nanosheets using low-cost NaBH 4 as a reductant in a liquid-phase environment. Benefi ting from the enhanced charge separation, transfer, and donor density resulting from the formation of surface disorders, and Bi deposition...

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From UV to Near‐Infrared, WS₂ Nanosheet: A Novel Photocatalyst for Full Solar Light Spectrum Photodegradation

Abstract: Narrow-bandgap semiconductor WS2 nanosheets are active photocatalysts, either under visible or under NIR irradiation. The photocatalyst functions are confirmed via photogeneration of an electron-hole pair, with a low rate of recombination.

Cited by 520 publications

References 49 publications

Black‐Phosphorus‐Incorporated Hydrogel as a Sprayable and Biodegradable Photothermal Platform for Postsurgical Treatment of Cancer

Black‐Phosphorus‐Incorporated Hydrogel as a Sprayable and Biodegradable Photothermal Platform for Postsurgical Treatment of Cancer

Electrochemical Applications of Two-Dimensional Nanosheets: The Effect of Nanosheet Length and Thickness

Enhancing the Photocatalytic Performance of BiOCl_xI_1−x by Introducing Surface Disorders and Bi Nanoparticles as Cocatalyst

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From UV to Near‐Infrared, WS2 Nanosheet: A Novel Photocatalyst for Full Solar Light Spectrum Photodegradation

Abstract: Narrow-bandgap semiconductor WS2 nanosheets are active photocatalysts, either under visible or under NIR irradiation. The photocatalyst functions are confirmed via photogeneration of an electron-hole pair, with a low rate of recombination.

Cited by 520 publications

References 49 publications

Black‐Phosphorus‐Incorporated Hydrogel as a Sprayable and Biodegradable Photothermal Platform for Postsurgical Treatment of Cancer

Black‐Phosphorus‐Incorporated Hydrogel as a Sprayable and Biodegradable Photothermal Platform for Postsurgical Treatment of Cancer

Electrochemical Applications of Two-Dimensional Nanosheets: The Effect of Nanosheet Length and Thickness

Enhancing the Photocatalytic Performance of BiOClxI1−x by Introducing Surface Disorders and Bi Nanoparticles as Cocatalyst

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Product

Resources

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From UV to Near‐Infrared, WS₂ Nanosheet: A Novel Photocatalyst for Full Solar Light Spectrum Photodegradation

Enhancing the Photocatalytic Performance of BiOCl_xI_1−x by Introducing Surface Disorders and Bi Nanoparticles as Cocatalyst