Wurtzite hexagonal ZnO semiconductor nano-rods (NRs) thin films were grown on silicon substrates and silver wire with diameter equal 68 nm. Sol gel (SG) and aqueous chemical growth (ACG) methods by two steps of prepar...Wurtzite hexagonal ZnO semiconductor nano-rods (NRs) thin films were grown on silicon substrates and silver wire with diameter equal 68 nm. Sol gel (SG) and aqueous chemical growth (ACG) methods by two steps of preparation (seed layers and nano-rod growth) are used for samples preparation. The structural and morphological properties are evaluated using X-ray diffraction (XRD) and scanning electron microscope (SEM). The proposed iron ion sensor has shown good linearity for a wide concentration range from 0.078 M/L to 0.26 M/L of iron ions. The results show that the electrode is highly sensitive to iron ions with a slope around 47.8 mV/decade with a regression coefficient R2 = 0.96.展开更多
In this work,we report the synthesis of ZnO ultrafine-rods with aspect ratio of about10via hydrothermal method.The as-prepared rod-like ZnO are characterized by X-ray diffraction(XRD),scanning electron mi-croscopy(SEM...In this work,we report the synthesis of ZnO ultrafine-rods with aspect ratio of about10via hydrothermal method.The as-prepared rod-like ZnO are characterized by X-ray diffraction(XRD),scanning electron mi-croscopy(SEM),transmission electron microscopy(TEM),and selected area electron diffraction(SAED).And the electrochemical performance of the ZnO material for Li-ion insertion and extraction is also investigated.It is found that the initial discharge capacity of1277mAh · g -1 and the high reversible capacity of766mAh · g -1 with low Li-ion insertion potential are obtained although the cyclic stability is relatively poor.The ZnO electrode after charging is characterized by X-ray diffraction,and only metallic Zn peaks with rod-like morphology are detected.The CV measurements prove the serial formation of Li-Zn alloys during discharging and charging process.展开更多
文摘Wurtzite hexagonal ZnO semiconductor nano-rods (NRs) thin films were grown on silicon substrates and silver wire with diameter equal 68 nm. Sol gel (SG) and aqueous chemical growth (ACG) methods by two steps of preparation (seed layers and nano-rod growth) are used for samples preparation. The structural and morphological properties are evaluated using X-ray diffraction (XRD) and scanning electron microscope (SEM). The proposed iron ion sensor has shown good linearity for a wide concentration range from 0.078 M/L to 0.26 M/L of iron ions. The results show that the electrode is highly sensitive to iron ions with a slope around 47.8 mV/decade with a regression coefficient R2 = 0.96.
文摘In this work,we report the synthesis of ZnO ultrafine-rods with aspect ratio of about10via hydrothermal method.The as-prepared rod-like ZnO are characterized by X-ray diffraction(XRD),scanning electron mi-croscopy(SEM),transmission electron microscopy(TEM),and selected area electron diffraction(SAED).And the electrochemical performance of the ZnO material for Li-ion insertion and extraction is also investigated.It is found that the initial discharge capacity of1277mAh · g -1 and the high reversible capacity of766mAh · g -1 with low Li-ion insertion potential are obtained although the cyclic stability is relatively poor.The ZnO electrode after charging is characterized by X-ray diffraction,and only metallic Zn peaks with rod-like morphology are detected.The CV measurements prove the serial formation of Li-Zn alloys during discharging and charging process.
