APPLIED ORGANOMETALLIC CHEMISTRY
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2025
·Vol. 39
·期 8
·e70290
·
IF 0
Miao Zhang,Yutong Zheng,Tongyu Zhou,Xiyu Song,Jianhan Hong,Yu Wang
High-efficiency electromagnetic interference (EMI) shielding fabrics with strong absorption and low reflection characteristics are urgently demanded to address the increasing electromagnetic radiation pollution, but it is still challenging to integrate these features onto single fabric. Herein, an all-in-one asymmetric conductive structure was constructed on 3D polyester fiber-based spacer fabric through a successive in situ polymerization of polyaniline and followed by localized electroless Ni–P plating process. Thanks to the synergistic effect of microwave absorbing layer of low-conductivity polyaniline coating and shielding reflection layer of highly conductive Ni-P plating, the incident electromagnetic waves undergo a process of “absorption–reflection–reabsorption” and are dissipated as much as possible when they propagate into the composite fabric. The resultant composite fabric shows a superior EMI SE over 60 dB within 18–40 GHz, whereas the EMI SE from reflection is only 1.6 dB, and the average reflectivity is as low as 0.31, which indicates that 69% of electromagnetic waves are absorbed in the fabric. Interestingly, the porous structure of substrate and highly conductive Ni–P plating also endow this fabric with good thermal insulation and low infrared emissivity, resulting in an excellent infrared stealth performance. This study provides a facile and feasible approach for the development of high-efficiency and multifunctional EMI shielding fabric with low-reflection characteristics that holds great promise for application in civil and military fields.
研究领域:
材料科学
·
纺织工程
·
电磁学
✓ 已验证
产品关联
DOI
RSC Advances
·
2015
·Vol. 5
·期 95
·77860-77865
·
IF 3.84
Bing Yu,Feng Zhai,Hailin Cong,Dong Wang,Qiaohong Peng,Shijing Yang,Ruixia Yang
Polymerization while swelling, a promising and high-efficiency technique based on seeded polymerization, was applied to synthesize monodisperse polystyrene (PS) microspheres with an average diameter of ∼6 μm. The polymerization time was reduced to only 22 hours compared to the traditional way of about 3 days. Taking the synthesized PS particles as templates, conductive shells were prepared by chemically plating nickel on the particle surface. Moreover, an anisotropic conductive film (ACF) was produced using conductive nickel microspheres as electricity transmission media. After removing the PS templates, the obtained magnetic nickel hollow microspheres have a potential application in rapid waste removal and detoxification extraction with a very simple procedure.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Muhammad Akram,Zahira Bano,Seerat Ul Ain Bhutto,Jingwen Pan,Ahmed Uddin,Muhammad Zaheer Afzal,Linrui Li,Mingzhu Xia,Fengyun Wang
This study was conducted to address water pollution concerns entwined with electroless nickel plating (ENP) industry. Its principal endeavor centers on the development and application of an innovative single-compartment technique to proficiently treat spent ENP baths. The research demonstrated the recovery of Nickel (Ni) from wastewater through synergistic interactions between electrocatalytic oxidation and electrodeposition processes. Electrochemical tests used a direct current power supply in constant current mode, with the positive pole on IrO 2 /Ti mesh and negative pole on stainless steel. Zero-valent nickel recovered on the electrodes was conclusively identified via SEM, XRD, and EDS analyses. This work carefully examined the impact of initial pH, initial Ni ion concentration, and current density (CD) on electrochemical recovery efficiency. The findings suggest that higher current densities positively influence the Ni recovery ratio. Additionally, through meticulous experiments, the viability of this approach for treating spent ENP baths has been confirmed. An impressive 98.88% recovery of Ni was achieved under specific conditions: CD 4.5 mA cm −2 , experimental time 180 min, pH 4.5, electrodes spacing 1.5 cm, temperature 55 °C, and a dilution factor 10 times. The study demonstrated the process for Ni recovering from ENP wastewater through direct oxidation and subsequent decomposition, leading to liberation of free Ni ions. The recovered substance, identified as zero-valent nickel, adheres to the electrodes. The method employed in this research is described by its cost-effectiveness, user-friendliness, and low energy consumption. As a result, this study makes valuable contributions to both wastewater remediation and the sustainable utilization of Ni resources.
研究领域:
环境科学
·
废水处理
·
电化学
·
材料科学
·
可持续资源管理
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Mengjie Zhao,Kangping Cui,Xing Chen,Haiyang Li,Wenming Wu
This study presents two novel chelating resins for achieving ultra-low discharge standards in electroplating wastewater treatment, addressing the critical challenge of reducing Ni concentration from about 1 mg/L to <0.1 mg/L in secondary effluent. SDC-1 and SDC-2 were innovatively synthesized by functionalizing styrene-divinylbenzene (SDC) white spheres with hydroxamic acid and sodium dithiocarbamate groups, respectively. Both resins demonstrated exceptional performance in removing complexed Ni(II) from secondary effluent to below 0.1 mg/L, with SDC-2 achieving remarkably low concentrations of 0.03 mg/L, meeting national ultra-low emission standards. Comprehensive characterization using FTIR, FESEM, BET, and XPS, combined with thermodynamic and kinetic modeling and DFT calculations, revealed the superior adsorption mechanisms. The adsorption behaviors of both resins fitted well with the Freundlich isotherm model and the pseudo-second-order kinetic model. DFT calculations unveiled that both resins possess abundant active sites capable of decomposing Ni(II) complexes for deep wastewater treatment. Mechanistic insights showed that SDC-1 forms stable five-membered cyclic coordination complexes through O and N atoms of -CONHOH groups, while SDC-2 creates more structurally stable polydentate complexes via simultaneous coordination of N and S atoms in -HN-C(=S)-S-Na + groups with Ni(II). This work establishes a promising new strategy for deep removal of complexed heavy metal ions to achieve ultra-low discharge standards in industrial wastewater treatment.
研究领域:
环境工程
·
废水处理
·
重金属去除
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）