聚邻苯二胺/ PbS 核壳纳米/微复合材料的制备及其在 HO 光电催化 H 生成中的应用。
Preparation of polyaniline/PbS core-shell nano/microcomposite and its application for photocatalytic H electrogeneration from HO.
机构信息
Nanophotonics and Applications Lab, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef, 62514, Egypt.
Polymer Research Laboratory, Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef, 62514, Egypt.
出版信息
Sci Rep. 2018 Jan 18;8(1):1107. doi: 10.1038/s41598-018-19326-w.
Lead sulfide (PbS) and polyaniline (PANI) nano/microparticles were prepared. Then, PANI/PbS core-shell nano/microcomposites (I, II, and III) were prepared by oxidative polymerization of different aniline concentrations (0.01, 0.03, and 0.05 M), respectively, in the presence of 0.05 M PbS. FT-IR, XRD, SEM, HR-TEM, and UV-Vis analyses were carried out to characterize the samples. From the FT-IR data, there are redshifts in PbS and PANI nano/microparticles bands in comparison with PANI/PbS nano/microcomposites. The average crystallite sizes of PANI/PbS core-shell nano/microcomposites (I, II, and III) from XRD analyses were 46.5, 55, and 42.16 nm, respectively. From the optical analyses, nano/microcomposite (II) has the optimum optical properties with two band gaps values of 1.41 and 2.79 eV. Then, the nano/microcomposite (II) membrane electrode supported on ITO glass was prepared and applied on the photoelectrochemical (PEC) H generation from HO. The characteristics current-voltage and current-time behaviors were measured at different wavelengths from 390 to 636 nm. Also, the incident photon-to-current conversion efficiency (IPCE) under monochromatic illumination condition was calculated. The optimum values for IPCE were 36.5 and 35.2% at 390 and 405 nm, respectively. Finally, a simple mechanism for PEC H generation from HO using the nano/microcomposite (II) membrane electrode was mentioned.
制备了硫化铅（PbS）和聚苯胺（PANI）纳米/微颗粒。然后，分别在 0.05M PbS 的存在下，通过不同苯胺浓度（0.01、0.03 和 0.05M）的氧化聚合，制备了 PANI/PbS 核壳纳米/微复合材料（I、II 和 III）。采用傅里叶变换红外光谱（FT-IR）、X 射线衍射（XRD）、扫描电子显微镜（SEM）、高分辨率透射电子显微镜（HR-TEM）和紫外-可见光谱（UV-Vis）分析对样品进行了表征。从 FT-IR 数据来看，与 PANI/PbS 纳米/微复合材料相比，PbS 和 PANI 纳米/微颗粒的带略有红移。XRD 分析得出的 PANI/PbS 核壳纳米/微复合材料（I、II 和 III）的平均晶粒尺寸分别为 46.5、55 和 42.16nm。从光学分析来看，纳米/微复合材料（II）具有最佳的光学性能，具有两个带隙值 1.41 和 2.79eV。然后，将基于 ITO 玻璃的纳米/微复合材料（II）膜电极制备并应用于 HO 的光电化学（PEC）H 生成。在 390 至 636nm 的不同波长下测量了电流-电压和电流-时间特性。此外，还计算了单色照射条件下的光子电流转换效率（IPCE）。在 390nm 和 405nm 下，IPCE 的最佳值分别为 36.5%和 35.2%。最后，提到了使用纳米/微复合材料（II）膜电极从 HO 进行 PEC H 生成的简单机制。
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