TiO2 nanorod arrays decorated with exfoliated WS(2 )nanosheets for enhanced photoelectrochemical water oxidation
TiO2 nanorod arrays decorated with exfoliated WS(2 )nanosheets for enhanced photoelectrochemical water oxidation
复制标题
用剥离的 WS(2 ) 纳米片装饰的 TiO2 纳米棒阵列可增强光电化学水氧化
DOI：
10.1016/j.jcis.2019.03.041
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发表时间：
2019
影响因子：
9.9
通讯作者：
Fan Xiaobin
中科院分区：
文献类型：
--
作者：
Pi Yuxi;Liu Bo;Li Zhen;Zhu Yukun;Li Yang;Zhang Fengbao;Zhang Guoliang;Peng Wenchao;Fan Xiaobin
制备了一种新型的三维(3D)光阳极，该光阳极由剥离的WS2纳米片包裹的TiO2纳米棒阵列(TiO2 NAs)组成，用于增强光电化学水氧化。用锂插层法制备了1 T%为55%的混合相WS2纳米片，然后用滴注法将其包覆在TiO2纳米粒子的表面。通过优化WS_2的负载量，在AM1.5(100∼mW/cm~2)辐照下，在+1.8 V时，获得了最大光电流为1.8 /cm~2，是纯 (0.8 mA/cm~2)的2.3倍。光催化活性的提高应归功于混合相WS2纳米片的存在，它具有良好的电荷传输能力，并能接受光生空穴进行水氧化。
A novel three-dimensional (3D) photoanode consisting of TiO2nanorod arrays (TiO2NAs) coated by exfoliated WS2nanosheets was fabricated for enhanced photoelectrochemical water oxidation. Mixed phase WS2nanosheets with 1 T percentage of 55% were exfoliated by the lithium insertion, which were then coated on the top of TiO2NAs by a drop-casting method. By optimizing the loading amount of WS2, a maximum photocurrent of ∼1.8 mA/cm2could be obtained at +1.8 V vs. RHE under AM 1.5 irradiation (100 mW/cm2), which is 2.3 times higher compared to the pure TiO2NAs (0.8 mA/cm2). The enhanced photo-activity should be attributed to the presence of the mixed phase WS2nanosheets, which have excellent charge transport ability and can accept photogenerated holes for water oxidation.