摘要
Issues like morphology control and further multifunctional applications are of significant importance for rare earth nano-oxides,e.g.,cerium dioxide(CeO_(2))nanostructures,however,relevant results in this respect are rather limited up to now.In the present work,ultrathin CeO_(2) nanosheets were synthesized through a facile lowtemperature hydrothermal method.The structure,morphology and specific surface area of these CeO_(2) nanosheets were characterized by X-ray diffraction(XRD),field emission scanning electron microscope(FESEM)and N2 adsorption-desorption.Significantly,CeO_(2) nanosheets have the potential as bifunctional sensing materials to detect both humidity and formaldehyde vapor.The CeO_(2) nanosheet humidity sensor exhibited excellent sensing characteristics in the relative humidity range of 11%-97% with the response value as high as 3.1×10^(4).Meanwhile,the CeO_(2) nanosheet gas sensor showed superior sensitivity and repeatability with fast response/recovery speed toward formaldehyde vapor at 300℃.Finally,the humidity and formaldehyde sensing mechanism were discussed as well.
出处
《Rare Metals》
SCIE
EI
CAS
CSCD
2021年第6期1614-1621,共8页
稀有金属（英文版）
基金
financially supported by the National Natural Science Foundation of China(Nos.21601094 and 21401139)
the Natural Science Foundation of Tianjin City(Nos.15JCQNJC02900 and 18JCQNJC73900)
Tianjin Municipal Education Commission(No.2018KJ130)。
