In this study,the benign target double terpyridine parts based amphiphilic ionic molecules(AIMs 1,2)and the reference single terpyridine segment included AIMs(AIMs 3,4)were synthesized through a multi-step method,and ...In this study,the benign target double terpyridine parts based amphiphilic ionic molecules(AIMs 1,2)and the reference single terpyridine segment included AIMs(AIMs 3,4)were synthesized through a multi-step method,and the molecular structures were fully characterized.The excellent anticorrosion of the target AIMs for copper surface in H_(2)SO_(4) solution was demonstrated by the electrochemistry analysis,which was more superior over those of the reference AIMs.The standard adsorption free energy changes of the target AIMs calculated by the adsorption isotherms were lower than -40 kJ·mol^(-1),suggesting an intensified chemical adsorption on metal surface.The molecular modeling and molecular dynamic computation of the studied AIMs were performed,demonstrating that the target AIMs exhibited lower highest occupied molecular orbital-lowest unoccupied molecular orbital energy gaps and greater adsorption energies than the reference ones.The chemical adsorption of the AIMs on metal surface was revealed by various spectroscopic methods including scanning electron microscopy,atomic force microscopy,Fourier transform infrared spectroscopy,attenuated total reflection infrared spectroscopy,Raman and X-ray diffraction.展开更多
Partial P-type metal ions doping(PPMID)is an alternative method to further enhance the gas sensing performance of N-type metal oxides(NMOs)in contrast to that of P-N metal oxides heterojunctions,but the influences of ...Partial P-type metal ions doping(PPMID)is an alternative method to further enhance the gas sensing performance of N-type metal oxides(NMOs)in contrast to that of P-N metal oxides heterojunctions,but the influences of the introduction of PPMID on the grain size and oxygen vacancies of NMOs have been rarely investigated.Herein,a simple and effective route has been demonstrated to address this problem with Cu^(2+)-doped SnO_(2) metastable solid solution nanofibers(CSMSSNs)as model and C_(2)H_(2) as target molecule by combining electrospinning and calcination technique.It seems that the introduction of PPMID can also affect crystal structure and oxygen vacancies of NMOs,proven by combining X-ray diffraction(XRD)and X-ray photoelectron spectra(XPS).Thus,PPD,crystal structure and oxygen vacancies have been combined to clarify the enhanced sensing performance of Cu-doped SnO_(2) metastable solid solution nanofibers angainst C_(2)H_(2).展开更多
基金the National Natural Science Foundation of China (21376282,21676035,21878029)Chongqing Science and Technology Commission (cstc2018jcyjAX0668)+2 种基金Shandong Province Natural Science Foundation (ZR2020QB18)China Postdoctoral Science Foundation (22012 T50762&2011 M501388)Graduate Student Research Innovation Project,Chongqing University (CYB18046)。
文摘In this study,the benign target double terpyridine parts based amphiphilic ionic molecules(AIMs 1,2)and the reference single terpyridine segment included AIMs(AIMs 3,4)were synthesized through a multi-step method,and the molecular structures were fully characterized.The excellent anticorrosion of the target AIMs for copper surface in H_(2)SO_(4) solution was demonstrated by the electrochemistry analysis,which was more superior over those of the reference AIMs.The standard adsorption free energy changes of the target AIMs calculated by the adsorption isotherms were lower than -40 kJ·mol^(-1),suggesting an intensified chemical adsorption on metal surface.The molecular modeling and molecular dynamic computation of the studied AIMs were performed,demonstrating that the target AIMs exhibited lower highest occupied molecular orbital-lowest unoccupied molecular orbital energy gaps and greater adsorption energies than the reference ones.The chemical adsorption of the AIMs on metal surface was revealed by various spectroscopic methods including scanning electron microscopy,atomic force microscopy,Fourier transform infrared spectroscopy,attenuated total reflection infrared spectroscopy,Raman and X-ray diffraction.
基金This work was supported by the National Natural Science Foundation of China(No.52073238)the Open Funds of the State Key Laboratory of Oil and Gas Reservoir Geology and Exploration of Southwest Petroleum University,China(Nos.PLN201806,PLN202019).
文摘Partial P-type metal ions doping(PPMID)is an alternative method to further enhance the gas sensing performance of N-type metal oxides(NMOs)in contrast to that of P-N metal oxides heterojunctions,but the influences of the introduction of PPMID on the grain size and oxygen vacancies of NMOs have been rarely investigated.Herein,a simple and effective route has been demonstrated to address this problem with Cu^(2+)-doped SnO_(2) metastable solid solution nanofibers(CSMSSNs)as model and C_(2)H_(2) as target molecule by combining electrospinning and calcination technique.It seems that the introduction of PPMID can also affect crystal structure and oxygen vacancies of NMOs,proven by combining X-ray diffraction(XRD)and X-ray photoelectron spectra(XPS).Thus,PPD,crystal structure and oxygen vacancies have been combined to clarify the enhanced sensing performance of Cu-doped SnO_(2) metastable solid solution nanofibers angainst C_(2)H_(2).
