<P><B>Abstract</B></P> <P>Complex metal oxides such as functionalized branched nanowires (NWs) are a new category of nanocomposites with unique properties for gas sensing applications. In the present work, we studied the...
http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
https://www.riss.kr/link?id=A107738594
2017
-
SCOPUS,SCIE
학술저널
656-666(11쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P><B>Abstract</B></P> <P>Complex metal oxides such as functionalized branched nanowires (NWs) are a new category of nanocomposites with unique properties for gas sensing applications. In the present work, we studied the...
<P><B>Abstract</B></P> <P>Complex metal oxides such as functionalized branched nanowires (NWs) are a new category of nanocomposites with unique properties for gas sensing applications. In the present work, we studied the gas sensing properties of Cr<SUB>2</SUB>O<SUB>3</SUB>-functionalized ZnO-branched SnO<SUB>2</SUB> NWs, inspired by their high surface area and numerous resistive points. These NWs were studied and compared with pristine SnO<SUB>2</SUB> NWs and ZnO-branched SnO<SUB>2</SUB> NWs. To prepare the functionalized NWs, ZnO-branched SnO<SUB>2</SUB> NWs were sputter-coated with a Cr layer and then annealed at 500°C to produce isolated Cr<SUB>2</SUB>O<SUB>3</SUB> NPs on the ZnO branches. Results of X-ray diffraction, scanning electron microscopy, and lattice-resolved transmission electron microscopy collectively showed that Cr<SUB>2</SUB>O<SUB>3</SUB>-functionalized ZnO-branched SnO<SUB>2</SUB> NWs were successfully formed. Cr<SUB>2</SUB>O<SUB>3</SUB> functionalization was found to greatly improve the sensors’ response to NO<SUB>2</SUB> gas. Furthermore, the sensors’ good selectivity was demonstrated by testing them in the presence of various interfering gases. The underlying gas sensing mechanisms are discussed herein in detail. We believe that the Cr<SUB>2</SUB>O<SUB>3</SUB>-functionalized ZnO-branched SnO<SUB>2</SUB> NWs reported herein are promising sensors for the highly sensitive and selective detection of NO<SUB>2</SUB> gas.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Cr<SUB>2</SUB>O<SUB>3</SUB>-functionalized ZnO-branched SnO<SUB>2</SUB> nanowires were successfully prepared. </LI> <LI> Cr<SUB>2</SUB>O<SUB>3</SUB> functionalization was found to greatly improve the sensors’ response to NO<SUB>2</SUB> gas. </LI> <LI> Underlying gas sensing mechanisms are discussed in terms of the Cr<SUB>2</SUB>O<SUB>3</SUB> spillover effect, the formation of Cr<SUB>2</SUB>O<SUB>3</SUB>/ZnO heterojunctions, and the creation of defects. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>