Ligand-free and size-controlled synthesis of oxygen vacancy-rich WO3−x quantum dots for efficient room-temperature formaldehyde gas sensing†,10.1039/C6RA20531C

热搜：

Lactoyl-CoA 全氟丁基戊烷白叶藤碱全氟己基辛烷新白叶藤碱壳寡糖特色专题-生物多肽

Ligand-free and size-controlled synthesis of oxygen vacancy-rich WO3−x quantum dots for efficient room-temperature formaldehyde gas sensing†

Yahui Li,Qiqi Zhang,Xinshi Li,Hua Bai,Wentao Li,Tingting Zeng,Guangcheng Xi

RSC Advances Pub Date : 10/03/2016 00:00:00 , DOI:10.1039/C6RA20531C

Abstract

A facile solvothermal decomposition route was developed for the size-adjustable synthesis of nearly monodispersed, monoclinic-phase WO_3−x QDs with sizes ranging from 1.3–4.5 nm. These QDs, with a high concentration of oxygen vacancies, have strong quantum confinement effects and can strongly absorb near-infrared (NIR) light. A solid–liquid–solid growth mechanism was proposed to explain the formation of the QDs. Experiments demonstrated that the rich oxygen vacancies and ultrathin grain size imparted these WO_3−x QDs with excellent room-temperature formaldehyde sensing properties.