Electrochemical recovery of low concentrated platinum (Pt) on nickel hexacyanoferrate nanoparticles film
Electrochemical recovery of low concentrated platinum (Pt) on nickel hexacyanoferrate nanoparticles film
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六氰基铁酸镍纳米粒子薄膜上电化学回收低浓度铂 (Pt)
DOI：
10.1016/j.jtice.2020.05.004
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发表时间：
2020-06
影响因子：
5.7
通讯作者：
Chen Rongzhi
中科院分区：
文献类型：
--
作者：
Wang Jixiang;Yang Shengjiong;Long Xinxin;Li Zejiao;Tan Jihua;Wang Xinming;Chen Rongzhi
首次利用六氰高铁酸镍（NiHCF）纳米颗粒膜包覆电极，从稀溶液中电化学回收低浓度Pt(II) （~ ppm）。采用循环伏安法（CV）、傅里叶变换红外光谱（FTIR）、x射线衍射（XRD）和场发射扫描电镜（FE-SEM）对膜结构进行了表征，发现膜具有致密的纳米颗粒结构和较高的氧化还原活性位点（4.6 mmol/g）。在搅拌良好的溶液中，Pt（II）对NiHCF膜有明显的回收作用。Pt（II）的回收率随着电位的降低而提高，但随着背景电解质浓度的升高而降低。在-0.6 V（相对于SCE）条件下，其回收率高达498.62 mg/g，约占氧化还原活性位点的56%，显著高于常规吸附工艺。Co2+的存在大大提高了从稀溶液中回收Pt（II）的能力，这是由于Co2+插入到Ni-NC-Fe-CN-有效位点，导致静电场减小，边界层效应增强。相反，Ni2+对Pt（II）回收率的影响不显著，这与能量色散x射线（EDX）的结果一致。动力学分析表明，吸附过程受多步机理控制，整个过程可能是先将Pt（II）在NiHCF膜上化学吸附，然后再将Pt（II）还原为Pt(0)。
The nickel hexacyanoferrate (NiHCF) nanoparticles film coated electrode was firstly used to recover low concentrated Pt(II) (∼ppm) from the dilute solution electrochemically. The film showed compact nanoparticles structure, high redox-active sites (4.6 mmol/g), characterised by Cyclic Voltammetry (CV), Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD) and Field Emission Scanning Electron Microscopy (FE-SEM). There was a prominent recovery effect of Pt(II) on NiHCF film in a well-stirred solution. The recovery of Pt(II) was improved with the potential decreasing but decreased with the background electrolyte concentration rising. And its recovery capacity was up to 498.62 mg/g at -0.6 V (vs. SCE), about occupying 56% of redox-active sites, which was significantly higher than the conventional adsorption process. The presence of Co2+greatly enhanced the Pt(II) recovery from the dilute solution, since Co2+inserted into availble Ni-NC-Fe-CN- sites, resulting in a drecrese of static electrostatic field and an increase of boundary laryer effect. Conversely, Ni2+had an insignificant effect on Pt(II) recovery in agreement with the results of energy dispersive X-ray (EDX). The kinetic considerations indicated that the adsorption process was controlled by a multistep mechanism, and the whole process possibly involved the chemisorption of Pt(II) on NiHCF film firstly and then Pt(II) was reduced into Pt(0).
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影响因子：
5.8
作者：
Fumagalli, Alessandro;Faggion, Bruno;Cherchi, Laura
通讯作者：
Cherchi, Laura
DOI：
10.1016/j.scitotenv.2008.03.037
发表时间：
2008-08
期刊：
The Science of the total environment
影响因子：
--
作者：
H. Prichard;Matthew T. Jackson;J. Sampson
通讯作者：
H. Prichard;Matthew T. Jackson;J. Sampson
影响因子：
4.8
作者：
Z. Xiao;A. Laplante
通讯作者：
Z. Xiao;A. Laplante
影响因子：
4.2
作者：
T. Angelidis;K. A. Kydros;S. Sklavounos
通讯作者：
T. Angelidis;K. A. Kydros;S. Sklavounos
影响因子：
4.7
作者：
Nikoloski, Aleksandar N.;Ang, Kwang-Loon;Li, Dan
通讯作者：
Li, Dan