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FTO 기판위 TiO<sub>2</sub> 나노로드의 시드박막층
김현,양비룡,Kim, Hyun,Yang, Bee Lyong 한국세라믹학회 2015 한국세라믹학회지 Vol.52 No.1
Nano-structured electrodes were fabricated to develop efficient photoelectrochemical conversion systems for the synthesis of hydrogen from water and hydrocarbon fuels from $CO_2$. In this work, we compared the photoactivity of rutile $TiO_2$ nanorods grown on FTO and SEED/FTO by a hydrothermal method. An analysis of the microstructures showed that the density of nanorod/SEED/FTO samples, which showed only the (002) peak in their x-ray diffraction patterns, was two times higher than that of a nanorod/FTO sample. The photocurrent density of nanorod/SEED/FTO samples was increased by as much as 40% of the photocurrent density of the nanorod/FTO sample due to the increased specific density of the nanorods. However, the transient time for a recombination of photogenerated electrons and holes was 20 times faster in the nanorod/SEED/FTO. The seed layers are discussed as possible recombination sites.
3D Nanotube Capacitor 구현을 위한 BLT Nanotube 제작
서보익,김상우,홍석경,양비룡,Seo, Bo-Ik,Shaislamov Ulugbek,Kim, Sang-Woo,Hong, Seok-Kyung,Yang, Bee-Lyong 한국세라믹학회 2006 한국세라믹학회지 Vol.43 No.4
BLT nanotubes were synthesized by using simple and convenient method template-wetting process. Porous alumina membranes were prepared by 2 step anodic oxidation as the template. To improve wetting properties and make low surface energy, BLT solution was mixed with polymer. Polymer was removed completely during annealing. After completely etching the template in 30 wt% KOH solution, we demonstrate that BLT nanotubes with a diameter of 200 nm can be fabricated. Grain growth process of BLT nanotubes during baking, and furnace annealing was examined by FE-SEM and XRD.
V. Navakoteswara Rao(라오),Karthik Kannan(카난),Bee Lyong Yang(양비룡),Jun-Mo Yang(양준모) 한국에너지기후변화학회 2021 한국에너지기후변화학회 학술대회 Vol.2021 No.11
Hydrogen gas is cleaner fuel and generates electrical energy in proton exchange membrane fuel cell with high efficiency. Many methods they reports hydrogen production like wind power, electrolysis, paralysis of oils and gasification goober gas among them renewable energy process, photocatalysis is a promising method for hydrogen production at near ambient conditions in aqueous medium. Here in we report Bi₂S₃@NiO-In₂S₃- TiO₂ core-shell nanostructures for enhanced hydrogen generation. The present work explores systematic study on the single step modified hydrothermal method Bi₂S₃ core coated by the shell NiO-In₂S₃-TiO₂ for enhanced photocatalytic hydrogen production (see in Figure1). The core-shell material composed of flower like nanostructures conformed by SEM characterizations and elemental analysis of the composite is presented Bi, Ni, In, S, Ti and O respectively. Bi₂S₃@NiO-In₂S₃-TiO₂ flower like structures and shell thickness 5-10 nm conformed by TEM analysis. XPS spectroscopy publicized chemical state of the core-shell nanostructure exists as Bi<SUP>+2</SUP>, Ni<SUP>+2</SUP>, In<SUP>+2</SUP>, Ti<SUP>4+</SUP>, S<SUP>2-</SUP> and O<SUP>2-</SUP>respectively. Among them Bi₂S₃/TiO₂ was shows high rate of H₂ evolution 44.1 mmol.h<SUP>-1</SUP>.g<SUP>-1</SUP>cat under UV- Visible light irradiation.
Tio<sub>2</sub> 나노튜브의 열처리 온도에 따른 Anatase 상의 분포와 그에 따른 광 촉매 효율
김세임,황지훈,이승욱,김락경,손수민,양준모,양비룡,Kim, Se-Im,Hwang, Ji-Hun,Lee, Seung-Wook,Kim, Rak-Kyoung,Son, Su-Min,Shaislamov, Ulugbek,Yang, Jun-Mo,Yang, Bee-Lyong 한국세라믹학회 2008 한국세라믹학회지 Vol.45 No.6
The purpose of this study is to characterize the photo-catalytic efficiency of $TiO_2$ nanotube with respect to the distribution of anatase phase which can be changed by the annealing temperature of $TiO_2$ nanotube. $TiO_2$ nanotube was fabricated by the anodization method in the 0.5 wt% HF electrolyte. And then the $TiO_2$ nanotube was annealed at temperatures ranging from $380^{\circ}C$ to $780^{\circ}C$ in dry oxygen ambient for 2 h. For the photo-catalytic water-splitting tests, the photocurrent density was measured as a function of applied potential with a potentiostat using a Ag/AgCl reference, Pt counter electrode, and 1 M KOH electrolyte under illumination of UV by a Xe arc lamp of 1 KW. According to the UV photo-catalytic water-splitting tests, the nanotube annealed at $560^{\circ}C$ was found to show the highest photocurrent density.