In order to solve the problem of heavy metal pollution, in this study, Zn-doped aerogel (Zn-A) was used as a material to remove Ni from wastewater. Zn-A was synthesized from sodium alginate and nipa palm shell-derived cellulose via the sol–gel method combined with freeze-drying. Zn-A has the ability to adsorb Ni up to 194.2 mg/g (Zn-A-Ni). After adsorbing Ni, Zn-A-Ni was pyrolyzed to form Zn, Ni-co-doped carbon aerogel (Zn-CA-Ni), which has high potential for manufacturing electrodes in supercapacitors (specific capacitance reaches 124.0F/g) and crystal violet treatment (adsorption capacity reaches 38.7 mg/g). Furthermore, Zn-A and Zn-CA-Ni were characterized through modern methods: Scanning electron microscope, energy dispersive X-ray, Fourier-transform infrared spectroscopy, X-ray diffraction analysis, and Nitrogen adsorption–desorption isotherm. The ability to adsorb Ni of Zn-A and adsorb crystal violet of Zn-CA-Ni was determined through ultraviolet–visible spectroscopy measurement. In addition, the electrochemical properties of Zn-CA-Ni were also analyzed through cyclic voltammetry, galvanostatic charge–discharge, and electrochemical impedance spectroscopy.

中文翻译：

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用于 Ni2+ 吸附的掺锌气凝胶 (Zn-A-Ni) 以及再利用 Zn-A-Ni 来制造用于吸附和储能应用的锌、镍共掺碳气凝胶


为了解决重金属污染问题，本研究采用掺锌气凝胶（Zn-A）作为材料去除废水中的Ni。以海藻酸钠和尼帕棕榈壳纤维素为原料，采用溶胶-凝胶法结合冷冻干燥合成Zn-A。 Zn-A 能够吸附高达 194.2 mg/g (Zn-A-Ni) 的 Ni。 Zn-A-Ni吸附Ni后热解形成Zn、Ni共掺杂碳气凝胶（Zn-CA-Ni），在制造超级电容器电极（比电容达到124.0F/g）和晶体方面具有很高的潜力紫罗兰处理（吸附能力达到38.7 mg/g）。此外，通过现代方法对Zn-A和Zn-CA-Ni进行了表征：扫描电子显微镜、能量色散X射线、傅里叶变换红外光谱、X射线衍射分析和氮吸附-解吸等温线。通过紫外-可见光谱测定测定了Zn-A对Ni的吸附能力和Zn-CA-Ni对结晶紫的吸附能力。此外，还通过循环伏安法、恒电流充放电和电化学阻抗谱分析了Zn-CA-Ni的电化学性能。