TiO 纳米棒阵列负载剥离 WS2 纳米片以增强光电化学水氧化性能。
TiO nanorod arrays decorated with exfoliated WS nanosheets for enhanced photoelectrochemical water oxidation.
机构信息
State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin 300354, China.
State Key Laboratory of Bio-fibers and Eco-textiles, School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China.
出版信息
J Colloid Interface Sci. 2019 Jun 1;545:282-288. doi: 10.1016/j.jcis.2019.03.041. Epub 2019 Mar 14.
A novel three-dimensional (3D) photoanode consisting of TiO nanorod arrays (TiO NAs) coated by exfoliated WS nanosheets was fabricated for enhanced photoelectrochemical water oxidation. Mixed phase WS nanosheets with 1 T percentage of 55% were exfoliated by the lithium insertion, which were then coated on the top of TiO NAs by a drop-casting method. By optimizing the loading amount of WS, a maximum photocurrent of ∼1.8 mA/cm could be obtained at +1.8 V vs. RHE under AM 1.5 irradiation (100 mW/cm), which is 2.3 times higher compared to the pure TiO NAs (0.8 mA/cm). The enhanced photo-activity should be attributed to the presence of the mixed phase WS nanosheets, which have excellent charge transport ability and can accept photogenerated holes for water oxidation.
一种新型的三维（3D）光阳极由涂覆有剥离的 WS 纳米片的 TiO 纳米棒阵列（TiO NAs）组成，用于增强光电化学水氧化。通过锂插层剥离得到具有 55% 1T 百分比的混合相 WS 纳米片，然后通过滴涂法涂覆在 TiO NAs 的顶部。通过优化 WS 的负载量，在 AM 1.5 照射（100 mW/cm）下，在 +1.8 V 相对于 RHE 时可以获得最大光电流约 1.8 mA/cm，与纯 TiO NAs（0.8 mA/cm）相比提高了 2.3 倍。增强的光活性应归因于混合相 WS 纳米片的存在，其具有优异的电荷传输能力，并可以接受光生空穴进行水氧化。
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