研究目的
To improve charge separation in NiS nanoparticles modified defect-engineered black TiO2 hollow nanotubes for boosting solar-driven photocatalytic H2 evolution.
研究成果
The NBTNs exhibit a high solar-driven photocatalytic H2 generation rate of 3.17 mmol h-1 g-1, comparable to Pt cocatalyst, due to improved charge separation, extended visible light absorption, and enhanced stability. This strategy provides insights into cocatalyst mechanisms and offers a noble metal-free approach for efficient photocatalysts.
研究不足
The photocatalytic performance is limited in the visible light region for pristine TiO2; the study focuses on NiS as cocatalyst and may not generalize to other materials; long-term stability and scalability for industrial applications are not fully addressed.
1：Experimental Design and Method Selection:
Synthesis of NiS nanoparticles modified black TiO2 hollow nanotubes (NBTNs) via surface hydrogenation and facile solvothermal method to enhance photocatalytic performance.
2：Sample Selection and Data Sources:
Samples include pristine TiO2 nanotubes, BTNs (black TiO2 nanotubes), and NBTNs with varying NiS loadings (3, 5, 7, 9 wt%).
3：List of Experimental Equipment and Materials:
X-ray diffraction (XRD), nitrogen adsorption-desorption isotherms, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), photoluminescence (PL) spectra, scanning Kelvin probe (SKP), transient fluorescence spectrum, photoelectrochemical measurements (linear sweep voltammograms, chronoamperometry, electrochemical impedance spectroscopy, Mott-Schottky plots), photocatalytic H2 evolution tests under AM
4：5 irradiation and single-wavelength light. Experimental Procedures and Operational Workflow:
Synthesis of NBTNs, characterization using XRD, XPS, SEM, TEM, EDS; photocatalytic activity tests in aqueous solution with methanol as sacrificial agent; photoelectrochemical measurements in 1 M KOH solution.
5：Data Analysis Methods:
Analysis of XRD patterns, XPS spectra, PL spectra, SKP maps, transient fluorescence lifetimes, photocurrent densities, impedance spectra, and Mott-Schottky plots to evaluate charge separation and photocatalytic efficiency.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容-
X-ray diffraction
Characterization of crystalline composition of samples
-
Nitrogen adsorption-desorption isotherms
Measurement of surface area and pore size distribution
-
X-ray photoelectron spectroscopy
Analysis of surface chemical valence and elemental composition
-
Scanning electron microscopy
Imaging of sample morphology
-
Transmission electron microscopy
High-resolution imaging and analysis of nanostructures
-
Energy dispersive X-ray spectroscopy
Elemental analysis and mapping
-
Photoluminescence spectra
Measurement of photogenerated electron-hole pair behavior
-
Scanning Kelvin probe
Measurement of work function and surface potential
-
Transient fluorescence spectrum
Measurement of charge carrier lifetime
-
Princeton Versa STAT
Versa STAT
Princeton
Photoelectrochemical measurements including linear sweep voltammograms, chronoamperometry, electrochemical impedance spectroscopy, and Mott-Schottky plots
-
登录查看剩余8件设备及参数对照表
查看全部
