In this work,Dy_(2)O_(3)rods and layered Dy_(2)WO_(6)heterostructure were effectively interconnected by carbon spheres named Dy_(2)O_(3)/Dy_(2)WO_(6)/C-sph nanocomposite with a confined interface and it was fabricated...In this work,Dy_(2)O_(3)rods and layered Dy_(2)WO_(6)heterostructure were effectively interconnected by carbon spheres named Dy_(2)O_(3)/Dy_(2)WO_(6)/C-sph nanocomposite with a confined interface and it was fabricated using a simple solvothermal approach.These ternary nanocomposites were investigated by X-ray diffraction(XRD),UV-visible diffuse-reflectance spectroscopy(UV-DRS),Fourier transform-infrared spectroscopy(FT-IR),Raman,field emission scanning electron microscopy(FESEM)with energy disperse spectroscopy(EDS),high-resolution transmission electron microscopy(HRTEM),and X-ray photoelectron spectroscopy(XPS)analyses systematically.The XRD data expose that the synthesized materials are formed with a virtuous crystalline state.The charge storage properties and electrochemical performances of the as-synthesized nanocomposites and pure components were assessed with the help of cyclic voltammogram(CV),galvanostatic charge-discharge studies(GCD),and electrochemical impedance studies(EIS),respectively.The rare-earth-based novel Dy_(2)O_(3)/Dy_(2)WO_(6)/C-sph nanocomposite as wo rking electrodes established commendable electrochemical perfo rmances with a maximum specific capacitance value of 123 F/g at a current density of 0.4 A/g in 2.0 mol/L aqueous KOH solution.According to the stability measurements,it was observed that the initial capacitance was maintained at~93%even after 2500 cycles,indicating that good electrochemical stability with the lowest internal resistance values was obtained from EIS analysis.The electrochemical measurements suggest that the Dy_(2)O_(3)/Dy_(2)WO_(6)/C-sph nanocomposite enables great competence and can be used as alternative electrode material in supercapacitor devices to avail high energy efficiency in a sustainable approach.展开更多
采用两步合成的水热法,简便快捷地制备出具有Ⅱ型异质结构的Bi_(2)WO_(6)/ZnO复合光催化材料;XRD、SEM、HRTEM、BET及UV-vis表征结果表明,Bi_(2)WO_(6)/ZnO复合材料形成了稳定的Ⅱ型异质结构,拓宽了可见光响应范围,并有效抑制了光生电...采用两步合成的水热法,简便快捷地制备出具有Ⅱ型异质结构的Bi_(2)WO_(6)/ZnO复合光催化材料;XRD、SEM、HRTEM、BET及UV-vis表征结果表明,Bi_(2)WO_(6)/ZnO复合材料形成了稳定的Ⅱ型异质结构,拓宽了可见光响应范围,并有效抑制了光生电子与空穴的复合。探究了在35 W LED灯照射下不同摩尔比例Bi_(2)WO_(6)/ZnO材料对大肠杆菌的抗菌能力。摩尔比为1∶2、浓度为1000 mg/L的Bi_(2)WO_(6)/ZnO抗菌效果最佳,在光照30 min内对大肠杆菌达到100%的抗菌率。采用畜禽废水、浴室污水、厨余废水作为实际污水模型,探究了摩尔比为1∶2的Bi_(2)WO_(6)/ZnO的实际应用能力。抗菌应用实验证明Bi_(2)WO_(6)/ZnO材料在实际抗菌方面具有良好的应用能力。通过细胞毒性实验证明Bi_(2)WO_(6)/ZnO复合光催化材料在实验浓度下无细胞毒性。展开更多
基金supported by Selective Excellence Research Initiative-2023,SRM Institute of Science and Technology(SRMIST/R/AR(A)/SERI2023/174/26-3944)。
文摘In this work,Dy_(2)O_(3)rods and layered Dy_(2)WO_(6)heterostructure were effectively interconnected by carbon spheres named Dy_(2)O_(3)/Dy_(2)WO_(6)/C-sph nanocomposite with a confined interface and it was fabricated using a simple solvothermal approach.These ternary nanocomposites were investigated by X-ray diffraction(XRD),UV-visible diffuse-reflectance spectroscopy(UV-DRS),Fourier transform-infrared spectroscopy(FT-IR),Raman,field emission scanning electron microscopy(FESEM)with energy disperse spectroscopy(EDS),high-resolution transmission electron microscopy(HRTEM),and X-ray photoelectron spectroscopy(XPS)analyses systematically.The XRD data expose that the synthesized materials are formed with a virtuous crystalline state.The charge storage properties and electrochemical performances of the as-synthesized nanocomposites and pure components were assessed with the help of cyclic voltammogram(CV),galvanostatic charge-discharge studies(GCD),and electrochemical impedance studies(EIS),respectively.The rare-earth-based novel Dy_(2)O_(3)/Dy_(2)WO_(6)/C-sph nanocomposite as wo rking electrodes established commendable electrochemical perfo rmances with a maximum specific capacitance value of 123 F/g at a current density of 0.4 A/g in 2.0 mol/L aqueous KOH solution.According to the stability measurements,it was observed that the initial capacitance was maintained at~93%even after 2500 cycles,indicating that good electrochemical stability with the lowest internal resistance values was obtained from EIS analysis.The electrochemical measurements suggest that the Dy_(2)O_(3)/Dy_(2)WO_(6)/C-sph nanocomposite enables great competence and can be used as alternative electrode material in supercapacitor devices to avail high energy efficiency in a sustainable approach.
文摘采用两步合成的水热法,简便快捷地制备出具有Ⅱ型异质结构的Bi_(2)WO_(6)/ZnO复合光催化材料;XRD、SEM、HRTEM、BET及UV-vis表征结果表明,Bi_(2)WO_(6)/ZnO复合材料形成了稳定的Ⅱ型异质结构,拓宽了可见光响应范围,并有效抑制了光生电子与空穴的复合。探究了在35 W LED灯照射下不同摩尔比例Bi_(2)WO_(6)/ZnO材料对大肠杆菌的抗菌能力。摩尔比为1∶2、浓度为1000 mg/L的Bi_(2)WO_(6)/ZnO抗菌效果最佳,在光照30 min内对大肠杆菌达到100%的抗菌率。采用畜禽废水、浴室污水、厨余废水作为实际污水模型,探究了摩尔比为1∶2的Bi_(2)WO_(6)/ZnO的实际应用能力。抗菌应用实验证明Bi_(2)WO_(6)/ZnO材料在实际抗菌方面具有良好的应用能力。通过细胞毒性实验证明Bi_(2)WO_(6)/ZnO复合光催化材料在实验浓度下无细胞毒性。
