Polymers
·
2024
·Vol. 16
·期 9
·1239
·
IF 4.7
Cong Yin,Yang Luo,Ting Pan,Liting Ding,Chenghuang Wang,Guoyuan Yuan,Chongxiong Duan
Recovering cobalt from waste batteries is crucial for resource recycling and environmental protection. Here, MOF-OH, a Zr-based MOF, was synthesized and merged into a polyacrylonitrile (PAN) matrix to create MOF-OH-PAN nanofibers (NFs). These NFs showed a high cobalt ion adsorption capacity of 33.1 mg/g, retaining over 90% of the capacity after six cycles. The adsorption mechanism involves Co(II) surface diffusion followed by strong bonding with functional groups. This technology enables efficient cobalt recovery from waste batteries, supporting reuse and reducing resource depletion and environmental pollution. The study provides insights into waste battery resource management, highlighting environmental and economic benefits and contributing to green resource recovery and circular economy initiatives.
研究领域:
材料科学
·
环境科学
·
资源回收
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANICA CHIMICA ACTA
·
2021
·
IF 2.545
Tingting Gu,Isaac Kwaku Attatsi,Weihua Zhu,Minzhi Li,Samuel A. Ndur,Xu Liang
Non-precious metal catalysts can effectively evolve hydrogen in aqueous media, but a highly efficient metal-based catalyst is still a significant assignment. Herein, Co(II)phthalocyanine was noncovalently immobilized on multiwalled carbon nanotubes through axial coordination via pyridine-pyrene linker and applied towards hydrogen evolution reactions. This material provided a superiorly enhanced electrocatalyzed performance signifying high efficiency. With this behaviour, our target material we believe paves the way towards designing efficient energy production and storage devices.
研究领域:
材料科学
·
催化化学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2021
·Vol. 84
·期 1
·251-261
·
IF 1.915
Hu Chunlian,Zhang Wei,Chen Yuantao,Ye Na,YangJi DaWa,Jia Haizhe,Shen Yanting,Song Minna
Here adsorption studies were proposed on a carboxylated sludge biochar (CSB) material modified by HNO 3 to assess its capacity in the removal of cobalt from aqueous solution. The as-prepared sludge biochar material was characterized by Brunauer-Emmett-Teller (BET) analysis, Fourier transform infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA), energy-dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). The isotherm process could be well described by the Langmuir isotherm model. The adsorption kinetics indicated that cobalt adsorption followed a pseudo-second-order kinetics model. The mechanism between Co(II) and biochar involved electrostatic interaction, ion exchange, surface complexation and physical function. The adsorption capacity on CSB was as high as 72.27 mg·g −1 , surpassing original sludge biochar (SB) as CSB had abundant oxygen-containing functional groups and many hydroxyls, plus the BET surface areas increased when SB was modified by HNO 3 , which stimulated adsorption effect. Therefore, this work shows that CSB could be used as an efficient adsorbent to remove Co(II) in wastewater. The material has abundant oxygen-containing functional groups, which are beneficial for binding Co(II). The isotherm process could be well described by the Langmuir isotherm model and pseudo-second-order kinetic model. The adsorbent has an efficient adsorption capacity for Co(II), as high as 72.27 mg·g −1 .
研究领域:
环境科学
·
化学工程
·
水处理
·
吸附技术
✓ 已验证
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2016
·
IF 4.179
Xiaohong Wang,Haiqian Hou,Yujun Li,Yingying Wang,Chen Hao,Cunwang Ge
A range of super-absorbent semi-IPN hydrogels—polyvinyl alcohol/poly (acrylic acid-co-acrylic amide) (PVA-P(AA-co-AM)) were synthesized via free radical polymerization method under ultrasound-assisted condition. L 16 (4 5 ) orthogonal experiments were designed to optimize the synthesis conditions and the success was characterized by FTIR, SEM and TGA. Swelling capacities were studied in various pH solution and saline solution whose results indicated that pH in solution shows an obvious influence on it and the salt resistance is greater in salt solution of low valence relative to that of high valence. Meanwhile, its swelling behavior was evaluated in water solution, which revealed that the swelling process conformed to the Schott model and the diffusion type was non-Fickian diffusion. Moreover, the adsorption on cobalt (II) from aqueous solutions was also investigated in the paper. The optimum pH value was found close to 4 for the cobalt (II) adsorption and it was discovered that adsorption kinetics and adsorption isotherms for cobalt (II) were in accordance with the pseudo-second-order model and the Freundlich model respectively. Besides, thermodynamic parameters were calculated for the cobalt (II) adsorption and the findings revealed that the adsorption behavior is spontaneous and endothermic.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Junxiang Pei,Haofeng Li,Fayi Chen,Zitao Chen,Xiaodong Yuan,Zhaoxia Han,Daqin Chen,Dechao Yu,Dawei Zhang
Carbon quantum dots (CQDs) with fluorescence emission have been widely studied for versatile applications, but facile tunability of the spectral properties of CQDs by doping remains to be further explored. Herein, employing lanthanide ion Eu3+ as a dopant and activator, a simple and efficient synthesis route for pure CQDs and Eu-CQDs was demonstrated using N, N-dimethylformamide, oleic acid, and oleylamine as precursors for carbon sources. In comparison, with the popular citric acid precursor, the as-prepared CQDs and Eu-CQDs exhibited an obviously smaller particle size (1.72 ± 0.29 nm) and a more uniform distribution. Through systematic optimization of Eu3+ doping for the Eu-CQD system, colorful light emissions in the visible range were first realized under excitation of ultraviolet (UV) ∼360 nm for promising application of UV-triggered light-emitting diodes. Most interestingly, this Eu-CQD solution with UV-excited colorful light emissions was utilized as a visual pH sensor, experimentally featuring good repeatabilities and stabilities (pH values switching between 7 and 14). Besides, the Eu-CQD solution exhibited highly sensitive detection characteristics for Co (II) ions. Due to the spectral overlapping, the quenching efficiency is as high as 96.3%, and the detection limit is obtained as 0.139 μM, which is much lower than the maximum concentration of Co (II) in the drinking water permitted by WHO. All of these relevant results significantly demonstrate the great potential of lanthanide doping in the multifunctionalization of CQDs for certain emerging applications like lighting, sensing, and detection.
研究领域:
材料科学
·
纳米技术
·
光学传感
·
环境监测
·
荧光探针
✓ 已验证
DOI
高影响因子
Frontiers in Microbiology
·
2024
·
IF 4
Liu Chenglong,Wen Xueer,Pan Huiqiao,Luo Ying,Zhou Junyang,Wu Yuzhe,Zeng Zhiyong,Sun Ting,Chen Jun,Hu Zhangli,Lou Sulin,Li Hui
Cobalt pollution is harmful to both the aquatic ecosystem and human health. As the primary producer of aquatic ecosystems in hypersaline environments, unicellular planktonic Dunaliella microalgae is considered to be a low-energy and eco-friendly biosorbent that removes excess cobalt and enhances the vitality of coastal and marine ecosystems. In this study, we found that the halotolerant microalga named Dunaliella sp. FACHB-558 could grow under a salinity condition with 0.5–4.5 M NaCl. A phylogenetic analysis based on the rbcL gene revealed that Dunaliella sp. FACHB-558 is a close relative of Dunaliella primolecta TS-3. At lab-scale culture, Dunaliella sp. FACHB-558 exhibited high tolerance to heavy metal stresses, including cobalt, nickel, and cadmium. Treatment with 60 μM cobalt delayed its stationary phase but ultimately led to a higher population density. Furthermore, Dunaliella sp. FACHB-558 has the ability to adsorb the cobalt ions in the aquatic environment, which was evidenced by the decreased amount of cobalt in the culture medium. In addition, the tolerance of Dunaliella sp. FACHB-558 to cobalt stress was correlated with enhanced nitric oxide content and peroxidase activity. The autophagy inhibitor 3-MA enhanced nitric oxide burst, increased peroxidase activity, and accelerated the bioremoval of cobalt, suggesting that the autophagy pathway played a negative role in response to cobalt stress in Dunaliella sp. FACHB-558. In summary, our study identified a novel microalga possessing high cobalt tolerance and provided a promising natural biosorbent for the research and application of heavy metal bioremediation technology.
研究领域:
环境科学
·
植物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymer Chemistry
·
2020
·Vol. 11
·期 31
·5057-5066
·
IF 5.342
Jianrui Zhang,Xiaocui Han,Cheng Yue,Di Liu,Ziyu Lin,Yirong Sun,Liyuan Chen,Jinhui Pang,Zhenhua Jiang
A new diamine monomer with a dioxinyl bipyrimidine group was synthesized. Polyimide containing a bipyrimidine group was successfully homopolymerized by chemical imidization. Analyses to determine the structure and properties of these polymers were conducted using 1H NMR and FTIR spectroscopy and gel permeation chromatography (GPC). For the first time, cobalt acetate was incorporated into the synthesized polyimide to fabricate cobalt-complexed polyimide thin film composite membranes (TFCMs) by spin coating. To fully understand the behavior of cobalt complexed TFCMs, these membranes were synthesized and then characterized by FTIR spectroscopy, X-ray diffraction (XRD), and differential scanning calorimetry (DSC) to survey the effects of cobalt acetate on polyimide. The morphologies of TFCMs were determined using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). Phase separations and defects were absent in all cobalt-complexed TFCMs; the average thickness of the films ranged from 550 to 600 nm. This strongly suggested that cobalt acetate has good compatibility with bipyrimidine polyimide. The gas separation performance for TFCMs was also determined with the following results: the CO2 permeance of DMD-PI-3.0 (mixing 3.0 wt% cobalt acetate) TFCMs was 69.9 GPU at 35 °C and 1.5 bar while the selectivity of CO2/CH4 was 44.79 for DMD-PI-15 TFCMs. In short, this work reports a promising method to utilize the separation characteristics of polyimide TFCMs by incorporating cobalt ions.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Bincheng Xu,Zexi Luo,Tao Tao,Ying Wang
Co-based nanomaterials have been proven as excellent catalysts in activating peroxymonosulfate (PMS), owing to the high adsorption ability and efficient electron transfer toward PMS molecules. However, the slow Co sites regeneration induced by HSO 5 − /SO 5 – redox cycle alone not only deteriorates the utilization efficiency of PMS, but also restricts the overall catalytic reaction rate. Herein, we report a novel S-FeCoO nano-catalyst to active PMS for chloramphenicol (CAP) degradation. As a result, up to 97.73 % of removal efficiency was achieved within 30 min even with an initial CAP concentration of 50 mg/L, which is substantially superior to other Co or Fe-based PMS activation systems. More importantly, synergistic effects arising from the coexisting Fe and S species were identified by the control experiments and characterization results. Co served as the primary active site, while Fe(II) and S 2− /S 2 2− greatly accelerated Co(III)/Co(II) redox cycle by donating electrons. The proposed strategy of dual acceleration of Co(III)/Co(II) redox cycle, as well as its mechanism insights, is expected to provide important implications on the rational design of advanced catalysts for PMS activation.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Applied Sciences-Basel
·
2024
·Vol. 14
·期 13
·5852
·
IF 2.5
Ping Bao,Xiaowei Wang,Jinfeng Men,Yudong Xie
Aiming at the removal of radioactive cobalt ions from water by graphene oxide (GO), the adsorption mechanism of Co2+on graphene oxide was analyzed using the quantum chemical calculation software Gaussian 16 based on density functional theory. The influence of material structure factors such as carboxyl groups, hydroxyl groups, epoxy groups and graphene sheets as well as external environmental factors such as pH, temperature and interfering ions on the adsorption effect was determined, and the influence of external environment was verified through experiments. Through calculation and experiment, it was found that the existence of oxygen-containing functional groups on graphene oxide can improve the adsorption efficiency of the material appropriately, and increasing the pH under acidic conditions was also helpful to improve the adsorption effect. The material had certain selectivity for Co2+, and the adsorption capacity and selectivity could be further improved when it was modified by increasing hydroxyl groups.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yang Peng,Xiao-Long Liu,Zhuo Xu,Shuai Zhang,Jia-Yue Tian,Zhihong Zhang,Miao Du
Reversible adsorption and selective separation of ammonia (NH 3 ) is a win–win strategy for resource utilization and pollutant control. However, synchronously achieving the efficiency, selectivity and recyclability for ammonia capture is a technological challenge. Adsorbents developed for such process should be engendered with multiple moderate interactions and structural stability. Here, we present a two-dimensional (2D) coordination polymer (CP) [Co(HAIPA) 2 ] n (Co-AIPA, H 2 AIPA = 5-aminoisophthalic acid) with copious carboxyl groups within the interlayer, which shows a high uptake of 12.1 mmol g −1 at 298 K and 1 bar, exceptionally high selectivity for NH 3 /N 2 (23985) and NH 3 /CO 2 (2394), and cycling durability. It is unveiled that the host–guest interactions between –COOH and NH 3 , and the guest–guest interactions between NH 3 molecules are formed in the slits of Co-AIPA. Overall, the spatial arrangement of dense carboxyl pendants within the interlayer allows for concerted interactions by multiple hydrogen bonding, leading to the superior NH 3 uptake capacity, ideal selectivity, and good regeneration.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 9
·3487-3497
·
IF 3.269
Wenqiang Luo,Zhishan Bai,Yong Zhu
A crosslinked carboxymethyl chitosan hydrogel (CCMCH) and resin (CCMCR) are prepared via the cross-linking of glutaraldehyde. The adsorption behavior and mechanism of CCMCH and CCMCR are studied for the removal Co(II) from wastewater and their differences have been studied. The results indicate that their adsorption occurs mainly by chemical adsorption mechanism. However, the Co(II) adsorption process on CCMCH is accompanied by physical adsorption. The maximum adsorption capacities for Co(II) uptake are 72.84 and 60.03 mg g−1 for CCMCH and CCMCR, respectively, under optimized conditions. The adsorption of Co(II) on CCMCH and CCMCR are both well fitted by the Langmuir isotherm and pseudo-second-order model. Also, the data of the adsorption kinetics for Co(II) on CCMCH follows the pseudo-first-order model. Analyses from FTIR and supplemental experiments confirm that the functional groups, including amino, hydroxyl, and carboxyl groups, are involved in the adsorption process.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
·
IF 5.876
Li Zhao,Deqiong Hu,Huiling Cheng
In this paper, a novel functional monomer, N-(pyrrolidin-2-ylmethyl) methacrylamide (PMMA), was synthesized. Using Co(II) ions as the template, 2,2-azoisobutyronitrile (AIBN) as the initiator, ethylene glycol dimethacrylate (EDGMA) as the crosslinking agent, twenty-seven Co(II) ion-imprinted composite membranes (Co(II)-PMMA-IICM 1∼27 ) and their corresponding non-imprinted composite membranes (PMMA-NICM 1∼27 ) were prepared. Additionally, the related parameters of the imprinting system were systematically optimized. Co(II) ion-imprinted composite membranes (Co(II)-PMMA-IICM 16 ) were prepared using Nylon-6 as the supporting membrane, which was soaked in a pre-polymerized solution of N,N-dimethylformamide and water (DMF: H 2 O ( v/v ) = 1: 1) for 180 s, using a molar ratio of template, monomer, and crosslinker of 1: 4: 50. The obtained material had a higher adsorption capacity ( Q e = 428.24 mg g −1 ) and imprinting factor ( IF = 2.36). The surface and internal porosity of Co(II)-PMMA-IICM 16 were characterized by scanning electron microscopy and a nitrogen adsorption apparatus. In addition, it was found that the adsorption process of Co(II)-PMMA-IICM 16 prepared under optimal conditions was better described by a Langmuir isotherm adsorption model, which verified that the adsorption involved monolayer adsorption. The kinetics data was more closely fit by a pseudo-second-order kinetics model, indicating that this adsorption process proceeded via chemisorption. The permeation experiments indicated that a “delayed” permeation mass transfer mechanism also occurred ( β (Co(II)/Cd(II)) = 2.11 and β (Co(II)/Cu(II)) = 1.55). The Co(II) ion-imprinted composite membrane prepared in this paper demonstrated a relatively better imprinting effect, a specific recognition ability for template ions, and good selective permeability. These results validated that the design of this novel functional monomer was reasonable, and that it has potential applications in various fields where adsorption is necessary.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）