Spherical Sb-doped SnO2 （ATO） nanoparticles were synthesized by the sol-gel route, employing SnCl4.5H2O and SbCl3 as precursors in an ethanol solution. The influences of the calcining temperature and calcining time ...Spherical Sb-doped SnO2 （ATO） nanoparticles were synthesized by the sol-gel route, employing SnCl4.5H2O and SbCl3 as precursors in an ethanol solution. The influences of the calcining temperature and calcining time on the crystallite size, crystallinity, lattice parameters, lattice distortion ratio and the resistivity of the ATO nanoparticles were synthetically investigated. The results suggested that the ATO nanoparticles were crystallized in a tetragonal cassiterite structure of SnO2 with a highly （110）- plane-preferred orientation. The calcining temperature had a dominating effect on the crystallite size, crystallinity, lattice distortion ratios and resistivity of the ATO. As the calcining temperature increased, the average crystallite size increased, the crystallinity was promoted accompanied by a decrease in the lattice distortion ratio and a corresponding decrease in the resistivity of the ATO. X-ray diffraction （XRD） and Fourier transform infrared spectrophotometer （FTIR） analysis revealed that Sb ions could not entirely supplant the Sn ions in the SnO2 lattice for a calcining time of less than 0.5 h, even at a calcining temperature of 1000 ℃. The ATO nanoparticles calcined at 1000 ℃ for 3,0 h possessed the lowest resistivity of 10.18 Ωcm.展开更多
Introduction The surgical approach for Siewert type II adenocarcinoma of the esophagogastric junction(AEG)is controversial.The JCOG9502 trial[1,2]has shown that the left thoracoabdominal approach has not improved the ...Introduction The surgical approach for Siewert type II adenocarcinoma of the esophagogastric junction(AEG)is controversial.The JCOG9502 trial[1,2]has shown that the left thoracoabdominal approach has not improved the prognosis but increased the morbidity in patients with Siewert typeⅡorⅢAEG compared with the abdominal-transhiatal(TH)approach.However,lower mediastinum lymphadenectomy and digestive tract reconstruction using the laparoscopic TH approach are technically difficult[3].展开更多
基金the National Natural Science Foundation of China (grant no. 50705094)"Hundred Talents Program" of Chinese Academy of Sciences (grant no.KGCX2-YW-804) for providing financial support
文摘Spherical Sb-doped SnO2 （ATO） nanoparticles were synthesized by the sol-gel route, employing SnCl4.5H2O and SbCl3 as precursors in an ethanol solution. The influences of the calcining temperature and calcining time on the crystallite size, crystallinity, lattice parameters, lattice distortion ratio and the resistivity of the ATO nanoparticles were synthetically investigated. The results suggested that the ATO nanoparticles were crystallized in a tetragonal cassiterite structure of SnO2 with a highly （110）- plane-preferred orientation. The calcining temperature had a dominating effect on the crystallite size, crystallinity, lattice distortion ratios and resistivity of the ATO. As the calcining temperature increased, the average crystallite size increased, the crystallinity was promoted accompanied by a decrease in the lattice distortion ratio and a corresponding decrease in the resistivity of the ATO. X-ray diffraction （XRD） and Fourier transform infrared spectrophotometer （FTIR） analysis revealed that Sb ions could not entirely supplant the Sn ions in the SnO2 lattice for a calcining time of less than 0.5 h, even at a calcining temperature of 1000 ℃. The ATO nanoparticles calcined at 1000 ℃ for 3,0 h possessed the lowest resistivity of 10.18 Ωcm.
基金Project of the“double first class”and collaborative innovation team of a high-level university discipline[2021xk48].
文摘Introduction The surgical approach for Siewert type II adenocarcinoma of the esophagogastric junction(AEG)is controversial.The JCOG9502 trial[1,2]has shown that the left thoracoabdominal approach has not improved the prognosis but increased the morbidity in patients with Siewert typeⅡorⅢAEG compared with the abdominal-transhiatal(TH)approach.However,lower mediastinum lymphadenectomy and digestive tract reconstruction using the laparoscopic TH approach are technically difficult[3].
