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Amplified internal electric field of Cs_(2)CuBr_(4)@WO_(3-x)S-scheme heterojunction for efficient CO_(2)photoreduction
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作者 Zhijie Zhang Xuesheng Wang +1 位作者 Junyi Qian Jiayue Xu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第5期521-533,共13页
Heterojunction construction,especially S-scheme heterojunction,represents an efficient universal strategy to achieve high-performance photocatalytic materials.For further performance stimulation of these well-designed... Heterojunction construction,especially S-scheme heterojunction,represents an efficient universal strategy to achieve high-performance photocatalytic materials.For further performance stimulation of these well-designed heterojunctions,modulating the interfacial internal electric field(IEF)to steer dynamic charge transfer represents a promising approach.Herein,we realized the precise regulation of Fermi level(E_(F))of the oxidation semiconductor(mesoporous WO_(3-x))by tailoring the concentration of oxygen vacancies(V_(O)),maximizing the IEF intensity in Cs_(2)CuBr_(4)@WO_(3-x)(CCB@WO_(3-x))S-scheme heterojunction.The augmented IEF affords a robust driving force for directional electron delivery,leading to boosted charge separation.Hence,the developed CCB@WO_(3-x)S-scheme heterojunction demonstrated outstanding photocatalytic CO_(2)reduction performance,with the electron consumption rate(Relectron)up to 390.34μmol g^(-1)h^(-1),which is 3.28 folds higher than that of pure CCB.An in-depth analysis of the S-scheme electron transfer mode was presented via theoretical investigations,electron spin resonance(ESR),photo-irradiated Kelvin probe force microscopy(KPFM),and in-situ X-ray photoelectron spectroscopy(XPS).Finally,the CO_(2)photoconversion route was explored in detail using in-situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS)and DFT theoretical calculations. 展开更多
关键词 Cs_(2)CuBr_(4) WO_(3-x) Oxygen vacancy S-scheme heterojunction Internal electricfield
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Analytical model for power dissipation in cell membranes in suspensions exposed to electric fields
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作者 覃玉荣 江悦华 赖声礼 《Journal of Southeast University(English Edition)》 EI CAS 2005年第2期145-148,共4页
Due to interaction among cells, it is too complex to build an exactanalytical model for the power dissipation within the cell membrane in suspensions exposed toexternal fields. An approximate equivalence method is pro... Due to interaction among cells, it is too complex to build an exactanalytical model for the power dissipation within the cell membrane in suspensions exposed toexternal fields. An approximate equivalence method is proposed to resolve this problem. Based on theeffective medium theory, the transmembrane voltage on cells in suspensions was investigated by theequivalence principle. Then the electric field in the cell membrane was determined. Finally,analytical solutions for the power dissipation within the cell membrane in suspensions exposed toexternal fields were derived according to the Joule principle. The equations show that theconductive power dissipation is predominant within the cell membrane in suspensions exposed todirect current or lower frequencies, and dielectric power dissipation prevails at high frequenciesexceeding the relaxation frequency of the exposed membrane. 展开更多
关键词 power dissipation analytical model cell suspension external electricfields
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Effects of Potassium Currents upon Action Potential of Cardiac Cells Exposed to External Electric fields
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作者 An-Ying Zhang Xiao-Feng Pang 《Journal of Electronic Science and Technology of China》 2008年第1期87-90,共4页
Previous studies show that exposure to high-voltage electric fields would influence the electro-cardiogram both in experimental animals and human beings.The effects of the external electric fields upon action potentia... Previous studies show that exposure to high-voltage electric fields would influence the electro-cardiogram both in experimental animals and human beings.The effects of the external electric fields upon action potential of cardiac cells are studied in this paper based on the dynamical model,LR91.Fourth-order Runger-Kuta is used to analyze the change of potassium ion channels exposed to external electric fields in detail.Results indicate that external electric fields could influence the current of potassium ion by adding an induced component voltage on membrane.This phenomenon might be one of the reasons of heart rate anomaly under the high-voltage electric fields. 展开更多
关键词 ELECTROCARDIOGRAM high-voltage electricfields potassium ions Runger-Kuta.
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