본문 바로가기
HOME> 논문 > 논문 검색상세

논문 상세정보

Journal of colloid and interface science v.512, 2018년, pp.86 - 95   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

The role of water in reducing WO3 film by hydrogen: Controlling the concentration of oxygen vacancies and improving the photoelectrochemical performance

Liu, Yang    (School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China   ); Yang, Yahui    (College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China   ); Liu, Qiong    (School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China   ); Li, Yaomin    (Department of Chemistry, University College London, London WC1H 0AJ, UK   ); Lin, Jie    (Pen-Tung Sah Micro-Nano Science and Technology Institute, Xiamen University, Xiamen, Fujian 361005, China   ); Li, Wenzhang    (School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China   ); Li, Jie    (School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China  );
  • 초록  

    Abstract H 2 O, as a product of reduced reaction by H 2 , may affect the chemical equilibrium according to the changing of the pressure ratio of H 2 O/H 2 in the system. Meanwhile, the performance may also be influenced by adsorption of H 2 O on the surface of the material. In this work, the effect of H 2 O is studied by reducing plate-like array WO 3 films under different pressure ratio of H 2 O/H 2 . It is controlled by changing the water temperature in the washing bottle through which the Ar/H 2 (80:20) gas flows. The higher water vapor pressure not only decreases the content of W 5+ but also increases the content of surface hydroxyl groups in the WO 3 films. Moreover, the excess water vapor improves the crystallinity. The WO 3 film shows hydrophobicity with adhesive property and high contact angle hysteresis after reduction, and the wettability increases with the increase of the pressure ratio of H 2 O/H 2 . Additionally, a built-in electric field may form by dissociation of the surface hydroxyl group and absorption of O − species, which promotes the charge separation, showing better photoelectrochemical (PEC) performance. Thus, water influences the coverage of chemical species on the surface of hydrogen reduced WO 3 film, which affects the wettability and PEC performance. Graphical abstract [DISPLAY OMISSION]


  • 주제어

    WO3 .   H2O .   Oxygen vacancies .   Surface hydroxyl groups .   Photoelectrochemical performance .   Wettability.  

 활용도 분석

  • 상세보기

    amChart 영역
  • 원문보기

    amChart 영역

원문보기

무료다운로드
  • 원문이 없습니다.
유료다운로드

유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.

원문복사신청을 하시면, 일부 해외 인쇄학술지의 경우 외국학술지지원센터(FRIC)에서
무료 원문복사 서비스를 제공합니다.

NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.

이 논문과 함께 출판된 논문 + 더보기