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不同堆垛结构二硫化铼/石墨烯异质结的光电化学特性

徐翔 张莹 闫庆 刘晶晶 王骏 徐新龙 华灯鑫

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不同堆垛结构二硫化铼/石墨烯异质结的光电化学特性

徐翔, 张莹, 闫庆, 刘晶晶, 王骏, 徐新龙, 华灯鑫

Photochemical properties of rhenium disulfide/graphene heterojunctions with different stacking structures

Xu Xiang, Zhang Ying, Yan Qing, Liu Jing-Jing, Wang Jun, Xu Xin-Long, Hua Deng-Xin
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  • 能源及污染是新时代所面临的重要难题, 光催化技术可通过电解水产氢以及降解有机物污染物, 在一定程度上解决此问题. 而制备光催化活性较好、光生载流子分离效率高的光催化剂是这项技术的关键. 本文采用液相剥离法结合电泳沉积法制备得到具有不同堆垛结构的二硫化铼-石墨烯(ReS2-Gra, ReS2在上)与石墨烯-二硫化铼(Gra-ReS2, 石墨烯在上)范德瓦耳斯异质结薄膜, 并对其进行了光谱学表征. 将上述异质结作为光电极材料, 应用在光电化学反应中, 发现: 1) 不同的堆垛结构, 将影响异质结材料的光电化学特性, 即在相同条件下, 与ReS2-Gra光电极相比, Gra-ReS2光电极的光电流增大了54%; 2) 异质结的构建, 使得光电极材料的光电化学特性得到显著增强, 得到了更大且响应更迅速的光电流, 即Gra-ReS2光电极(2.47 μA)的光电流响应是纯ReS2光电极(1.16 μA)的2倍. 本工作为范德瓦耳斯异质结的制备提出新思路的同时, 也为太阳能转换器件的研究打下了理论基础.
    Energy and pollution are crucial problems. Photocatalysis technology is a way to solve the problem by electrolysis of aquatic hydrogen and degradation of organic pollutants. Preparing photocatalysts with fantastic photocatalytic activity and high photocarrier separation efficiency is a key technique. In recent years, two-dimensional (2D) nanomaterials have attracted much attention because of their unique structures and excellent properties, which are different from the traditional materials’. The 2D nanomaterials demonstrate in-plane covalent bonds and out-of-plane van der Waals interactions. Therefore, two 2D materials can form van der Waals heterojunctions by van der Waals forces, which are also known as nanocomposites. However, there is an interesting problem in the study of van der Waals heterojunctions in the field of photochemistry, which has not been paid attention to no studied. Specifically, that problem is whether the photochemical properties of the van der Waals heterojunctions are affected by the different stacking structures after the relationship between the upper and lower positions has been adjusted. In this paper, the van der Waals heterojunction films with different stacking structures ReS2-Gra (ReS2 on the top) and Gra-ReS2 (graphene on the top) are prepared by liquid phase exfoliation combined with electrophoretic deposition method. The heterojunctions are utilized as photoelectrodes in photochemical reactions, and the findings are as follows. i) Different stacking structures will affect the photoelectric chemical characteristics of heterojunctions: comparing with the ReS2-Gra photoelectrode, the photocurrent of the Gra-ReS2 photoelectrode increased by 54% under the same conditions. We think that the main reason is due to the fact that graphene has a zero-band gap structure and holds a wider spectral absorption range. ii) The construction of the heterojunction significantly enhances the photochemical properties of the photoelectrode materials, resulting in a larger and rapidly photocurrent response. The photocurrent response of the Gra-ReS2 photoelectrode (2.47 μA) is twice that of the pure ReS2 photoelectrode (1.16 μA). Based on the experimental results of this paper, a possible mechanism for effective separation and prolonged recombination of the photo-induced electro-hole pairs in ReS2/graphene heterojunction is proposed. This work not only puts forward new ideas for preparing the van der Waals heterojunctions, but also lays a theoretical foundation for further studying the solar energy conversion devices.
      通信作者: 徐新龙, xlxuphy@nwu.edu.cn ; 华灯鑫, xauthdx@163.com
    • 基金项目: 中国博士后科学基金(批准号: 2020M673611XB)、陕西省教育厅科研基金(批准号: 20JK0781, 17JS094)和陕西省自然科学基金(批准号: 2018JQ4046)资助的课题
      Corresponding author: Xu Xin-Long, xlxuphy@nwu.edu.cn ; Hua Deng-Xin, xauthdx@163.com
    • Funds: Project supported by the China Postdoctoral Science Foundation (Grant No. 2020M673611XB), the Scientific Research Foundation of the Education Department of Shannxi Province, China (Grant Nos. 20JK0781, 17JS094), and the Natural Science Foundation of Shannxi Province, China (Grant No. 2018JQ4046)
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  • 图 1  ReS2和Graphene纳米片制备过程示意图

    Fig. 1.  Preparation process of ReS2 and Graphene nanosheets

    图 2  Gra-ReS2异质结薄膜的制备过程示意图

    Fig. 2.  Preparation process of Gra-ReS2 heterojunction.

    图 3  ReS2、石墨烯、Gra-ReS2、ReS2-Gra异质结拉曼光谱图

    Fig. 3.  Raman spectra of ReS2, graphene, Gra-ReS2 heterojunction and ReS2-Gra heterojunction.

    图 4  光电极的I-V曲线

    Fig. 4.  The I-V curves of photoelectric electrode.

    图 5  (a) 光电极的I-T曲线; (b) 各光电极的最大光电流柱状图

    Fig. 5.  (a) The I-T curves of photoelectric electrode; (b) maximum photocurrent histogram of photoelectric electrode.

    图 6  (a) Gra-ReS2和(b) ReS2-Gra光电极的光电流上升及衰减时间响应

    Fig. 6.  Rising and decay response time of photocurrents from (a) Gra-ReS2 photoelectrode and (b) ReS2-Gra photoelectrode.

    图 7  Gra-ReS2异质结的能带排列与电子迁移示意图(EV-价带, EC-导带)

    Fig. 7.  Gra-ReS2 heterojunction band alignment and electron mobility, where EC is energy of conduction band minimum, EV is energy of valence band maximum.

    表 1  二维材料的瞬态光电流

    Table 1.  Transient photocurrent of two-dimensional materials.

    2D materialsPhotocurrent/µA
    Graphene0.37
    Bi2S3[22]0.60
    WS2[10]0.52
    MoS2[23]0.64
    ReS21.16
    MoS2-Graphene[9]0.81
    MoS2-WS2[10]1.48
    ReS2-Gra1.60
    Gra-ReS22.47
    下载: 导出CSV
  • [1]

    Liu Y, Huang Y, Duan X F 2019 Nature 567 323Google Scholar

    [2]

    Zhang Z, Lin P, Liao Q, Kang Z, Zhang Y 2019 Adv. Mater. 31 1806411Google Scholar

    [3]

    He M M, Quan C J, He C, Huang Y Y, Zhu L P, Yao Z H, Zhang S J, Bai J T, Xu X L 2017 J. Phys. Chem. C 121 27147Google Scholar

    [4]

    Quan C J, Lu C H, He C, Xu X, Huang Y Y, Zhao Q Y, Xu X L 2019 Adv. Mater. Interfaces 6 1801733Google Scholar

    [5]

    Zhang X Y, Selkirk A, Zhang S F, Huang J W, Li Y X, Xie Y F, Dong N N, Cui Y, Zhang L, Blau W J, Wang J 2017 Chem. Eur. J 23 3321Google Scholar

    [6]

    Pasqual R, Schaibley J R, Jones M A, Ross S J, Wu S F, Aivazian G, Klement P, Seyler K, Clark G, Ghimire N J, Yan J Q, Mandrus D G, Yao W, Xu X D 2015 Nat. Commun. 6 6242Google Scholar

    [7]

    Sun Y, Zhou Z S, Huang Z, Wu J B, Zhou L J, Cheng Y, Liu J Q, Zhu C, Liu K H, Wang X Y, Wang J P, Huang W, Wang L 2019 Adv. Mater. 31 1806562Google Scholar

    [8]

    李亮, 皮乐晶, 李会巧, 翟天佑 2017 科学通报 62 3134Google Scholar

    Li L, Pi Y J, Li H Q, Zhai T Y, 2017 Chin. Sci. Bull. 62 3134Google Scholar

    [9]

    Huang M J, Zhou Y X, Guo Y H, Wang H, Hu X R, Xu X L, Ren Z Y 2018 J. Mater. Sci. 53 7744Google Scholar

    [10]

    Lu C H, Ma J Y, Si K Y, Xu X, Quan C J, He C, Xu X L 2019 Phys. Status Solidi A 216 1900544Google Scholar

    [11]

    Si K Y, Ma J Y, Lu C H, Zhou Y X, He C, Yang D, Wang X, Xu X L 2020 Appl. Surf. Sci. 507 145082Google Scholar

    [12]

    徐铖, 彭涛, 管明艳, 张强, 马锡英 2019 苏州科技大学学报(自然科学版) 36 23Google Scholar

    Xu C, Peng T, Guan M Y, Zhang Q, Ma X Y 2019 J. Suzhou Univ. Sci. Technol. (Nat. Sci.) 36 23Google Scholar

    [13]

    Tiwari Santosh K, Sumanta S, Nannan W, Andrzej H 2019 J. Sci-Adv. Mater. Dev. 5 10Google Scholar

    [14]

    Thomas W R, Amir Y 2010 Nat. Nanotechnol. 5 699Google Scholar

    [15]

    Huimei L, Bo X, J-M L, Jiang Y, Feng M, Chun-Gang D, G W X 2016 Phys. Chem. Chem. Phys. 18 14222Google Scholar

    [16]

    廖杨芳, 詹建友, 宋春红, 杨姗姗, 吕兵 2019 低温物理学报 41 191Google Scholar

    Liao Y F, Zhan J Y, Song C H, Yang S S, Lv B 2019 Low Temp. Phys. Lett. 41 191Google Scholar

    [17]

    Zhang Q, Wang W, Zhang J, Zhu X, Fu L 2018 Adv. Mater. 30 1707123Google Scholar

    [18]

    Wan X, Chen K, Liu D 2012 Chem. Mater. 24 3906Google Scholar

    [19]

    Zhai T, Li H, Gan L, Ma Y, Hafeez M 2016 Adv. Funct. Mater. 26 4551Google Scholar

    [20]

    Feng Y, Zhou W, Wang Y, Zhou J, Liu E, Fu Y, Ni Z, Wu X, Yuan H, Miao F 2015 Phys. Rev. B 92 054110Google Scholar

    [21]

    Liu H, Liu M, Tang R, Luo Z C, Xu W C, Luo A P, Wang F Z 2016 Opt. Eng. 55 081308Google Scholar

    [22]

    Guo Y H, Zhao Q Y, Yao Z H, Si K Y, Zhou Y X, Xu X L 2017 Nanotechnology 28 335602Google Scholar

    [23]

    Zhao Q, Guo Y, Zhou Y, Yan X, Xu X 2017 J. Colloid Interfaces Sci. 490 287Google Scholar

    [24]

    Li L Q, Long R, Prezhdo O V 2017 Chem. Mater. 29 2466Google Scholar

    [25]

    Long R, Prezhdo O V 2016 Nano Lett. 16 1996Google Scholar

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出版历程
  • 收稿日期:  2020-11-12
  • 修回日期:  2020-12-14
  • 上网日期:  2021-04-26
  • 刊出日期:  2021-05-05

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