http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
장점석(Jum Suk Jang),장혜영(Hye Young Chang),소원욱(Won Wook So),이영우(Young Woo Rhee),문상진(Sang Jin Moon) 한국수소및신에너지학회 2000 한국수소 및 신에너지학회논문집 Vol.11 No.3
To improve the photochemical energy conversion efficiency and the stability of CdS particulate film electrode which is used to produce hydrogen from the aqueous H₂S solution photoelectrochemically, surface treatment of this film was carried out using TiCl₄ solution. CdS particles for preparation of the films were synthesized by precipitation reaction of Cd(NO₃)₂·9H₂O and Na₂S·4H₂O. Then, the CdS sol was hydrothermally treated for 12hr in an autoclave with the variation of treatment temperature to control the crystalline phase of particles. CdS film electrode was thus prepared by annealing at 400? for 12hr of the wet-film cast at room temperature, and subsequently surface treated with TiCl₄ solution. The electrodes were characterized using XRD, SEM, and the photocurrent meter. The photocurrents of Cds film electrodes prepared with surface treatment were up to two times higher than the electrodes without surface treatment, indicating about 4.0 mA/cm². Hydrogen production rate in a continuous flow system using photoelectrochemical or photochemical cells prepared with surface treatment also increased in proportion to the increase of photocurrents.
김수선(Soo Sun Kim),장점석(Jum Suk Jang),소원욱(Won Wook So),김광제(Kwang Je Kim),문상진(Sang Jin Moon) 한국수소및신에너지학회 2000 한국수소 및 신에너지학회논문집 Vol.11 No.4
In the case of photocatalytic hydrogen production from water, the performance-property relationships of CdS-TiO₂ film type composite catalysts were investigated. To control the physical properties of the primary particles, the mixture of CdS and TiO₂ nano-sols prepared by the sol-gel method at room temperature was hydrothermally treated at 240oC for 12hr. The film electrodes were prepared by the casting method. The photocurrents measured by a photoelectrochemical method and the hydrogen production rates measured by a photochemical method were closely dependent on the physical properties such as crystalline form, primary particle size and CdS/TiO2 mole ratio, and these varied in the range of 1.2~2.6 mA/cm2 and 1.0~1.6x10-3mol/hr, respectively.
M-Doped TiO<sub>2</sub> (M=Co, Cr, Fe)의 제조 : 전자 밴드구조-(1)
배상원,김현규,지상민,장점석,정의덕,홍석준,이재성,Bae, Sang-Won,Kim, Hyun-Gyu,Ji, Sang-Min,Jang, Jum-Suk,Jeong, Euh-Duck,Hong, Suk-Joon,Lee, Jae-Sung 한국세라믹학회 2006 한국세라믹학회지 Vol.43 No.1
The electronic band structures of Metal-doped titanium dioxide, M-doped $TiO_2$ (M=Co, Cr, Fe), have been studied by using XRD, UV-vis diffuse reflectance spectrometer and FP-LAPW (Full-Potential Linearized Augmented-Plane-Wave) method. The UV-vis of M-doped $TiO_2$ (M=Co, Cr, Fe) showed two absorption edges; the main edge due to the titanium dioxide at 387 nm and a shoulder due to the doped metals at around 560 nm. The band gap energies of Co, Cr and Fe-doped $TiO_2$ calculated by FP-LAPW method were 2.6, 2.0, and 2.5 eV, respectively. The theoretically calculated band gap energy of $TiO_2$ by using FP-LAPW method was the same as experimental results. FP-LAPW method will be useful for fabrication and development of photo catalysts working under visible light.