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首页> 外文期刊>Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications >Remarkably enhanced photocatalytic activity by nickel nanoparticle deposition on sulfur-doped titanium dioxide thin film
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Remarkably enhanced photocatalytic activity by nickel nanoparticle deposition on sulfur-doped titanium dioxide thin film

机译：镍纳米颗粒在硫掺杂二氧化钛薄膜上的沉积显着增强了光催化活性

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摘要

To enhance the photocatalytic performance of titanium dioxide, the structures of both bulk and surface were modified. Doping of sulfur atoms to be substituted for lattice oxygen atoms of titanium dioxide was carried out to extend the light absorption by atmosphere-controlled pulsed laser deposition, which allows direct preparation of impurity-included thin film such as sulfur-doped titanium dioxide. On the other hand, to enhance the surface catalytic reaction, nickel nanoparticles were deposited at the thin film substrate by chemical vapor reductive deposition method, which is a novel preparation technique of metallic nanoparticles on the substrate surface. Obtained sulfur-doped titanium dioxide was found to possess sensitivity to visible light with the wavelength up to 550 nm, indicating the photocatalytic activity in visible region. Sulfur doping induced the dye degradation activity under visible light irradiation. When nickel nanoparticles were deposited, a remarkable enhancement of the hydrogen evolution activity through ethanol decomposition of more than 20 times as much as unmodified titanium dioxide thin film was accomplished. In addition, the stability of sulfur atom doped into titanium dioxide structure was investigated.
机译：为了增强二氧化钛的光催化性能，修饰了本体和表面的结构。进行掺杂以取代二氧化钛的晶格氧原子的硫原子以通过气氛控制的脉冲激光沉积来扩展光吸收，这允许直接制备含杂质的薄膜例如掺杂硫的二氧化钛。另一方面，为了增强表面催化反应，通过化学气相还原沉积法将镍纳米粒子沉积在薄膜基板上，这是在基板表面上制备金属纳米粒子的新技术。发现获得的硫掺杂的二氧化钛对波长高达550nm的可见光具有敏感性，表明在可见光区域中的光催化活性。硫掺杂在可见光照射下诱导染料降解活性。当沉积镍纳米颗粒时，通过乙醇分解显着提高了氢气释放活性，是未改性的二氧化钛薄膜的20倍以上。另外，研究了掺杂到二氧化钛结构中的硫原子的稳定性。

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