INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2022
·Vol. 23
·期 19
·11356
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IF 6.208
Qinglong Luo,Xueying Wang,Mingzhe Dong,Xueli Huang,Zhijian Wu,Jun Li
The adsorption separation and extraction of low-concentration boron from salt-lake brine have great significance. Magnetic separation avoids the problem of adsorbent granulation and improves the usage efficiency. The silicon-based adsorbents have attracted interest due to their superior acid and alkali resistance, in which polyhydroxy graphene enhances the adsorption of boron ions. Herein different boron adsorbents, derived by magnetic separation, were developed and characterized by SEM, TEM, XPS, VSM, FT-IR, and XRD analysis. The adsorption-desorption performance of boron adsorbents with different compositions was evaluated. The isotherms and kinetics parameters of the boron extraction were evaluated based on adsorption-desorption tests. The graphene-based magnetic adsorbent (Go-Fe3O4@SiO2@mSiO2-Glu) registered a high boron adsorption capacity of 23.90 mg/g at pH = 9 in the boron solution and 24.84 mg/g for East Taigener salt-lake brine. The Na+, Mg2+, Ca2+, and Cl−ions have little interference with the boron adsorption. The adsorbents exhibit magnetic separation performance and good cycle life. The results showed that acid-alkali desorption solution has little effect on the adsorbents, and the composite of graphene enhances the adsorption of boron ions. The adsorbents developed in this study are promising to recover boron from low-concentration boron-containing salt-lake brines.Keywords:adsorption;boron adsorbents;magnetic separation;SiO2;graphene;salt-lake brines
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Wentao Li,Qian Zhang,Zuohua Liu,Changyuan Tao,Guocan Zheng,Nanxiong Chen,Dong Wang,Hufei Chen
The long-term accumulation of manganese sulfate residues can lead to the release of soluble manganese ions, thereby contaminating the surrounding environment. Although numerous methods exist to address the issue of soluble manganese ions, current harmless treatment approaches fail to consider the subsequent utilization of manganese slag. This study aims to control the magnetic properties of processed residues by adjusting the addition of barium hydroxide and the reaction duration. Our results reveal that the harmless treatment of manganese sulfate slag is achievable with various amounts of barium hydroxide, and the magnetic properties of the reconstructed slag increase with the increased barium hydroxide dosage. Magnetic separation is employed to separate the magnetic components from the reconstructed slag, and the distribution state of these magnetic substance is modulated by altering the particle size and reagent addition. Under optimal conditions, this study finds that the grade of iron was 24.17 %, the grade of manganese was 8.08 %, and the recovery could reach 79 % for iron and 70 % for manganese. Finally, the fining slag obtained by magnetic separation was utilized as an additive in the preparation of ferrites, reducing the minimum reflection loss of the ferrites to −16.18 dB, signifying up to 90 % electromagnetic wave attenuation. These findings indicate that the fining slags holds great potential as a dopant for ferrites, offering a viable pathway for the resourceful and environmentally friendly treatment of manganese sulfate residues.
研究领域:
环境科学
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材料科学
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冶金工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
·
IF 5.8
Yingying Fang,Wenbo Zhou,Yihuan Cheng,Yuge Zhang,Tingting Yu,Shaoxian Song
The high-value utilization of steel pickling waste liquid (SPWL) is an important direction in the resourceful utilization of hazardous waste. In this study, nano-Fe 3 O 4 prepared from SPWL (S-Fe 3 O 4 ) was hydrothermally compounded with MnO 2 as Fe 3 O 4 -MnO 2 (SFM), which were compared with Fe 3 O 4 -MnO 2 (CFM) prepared by chemical reagents. The synthetic materials were evaluated by SEM, VSM, BET, XRD, and zeta potential, the results show that the spherical S-Fe 3 O 4 was encapsulated by spiny spherical shell-like MnO 2 , and the SFM has a high saturation magnetization and specific surface area (159.91 m 2 /g). The adsorption experiments demonstrated that the adsorption effect of SFM on Pb 2+ is highly similar to that of CFM. The maximal adsorption capacity of SFM reached 129.74 mg/g under ideal composite ratio and pH conditions, and the adsorption process was unaffected by competing heavy metal ions coexisting in the environment. Moreover, the high saturation magnetization strength of the SFM makes it simple to separate materials under a magnetic field. The pseudo-second-order kinetics and Langmuir isotherm models provided a good description of the Pb 2+ adsorption on SFM. XPS and FTIR analysis provided evidence that the adsorbent surface has a high concentration of -OH functional groups, and that O atoms serve as Pb 2+ binding sites, suggesting that ion exchange occurs during the SFM adsorption process. In this paper, we developed a cheap SFM with high adsorption performance and provided a novel approach to the high-value application of SPWL.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Chuan Niu,Tian Liu,Liping Yang,Dan Wang,Xiong Xiao,Shaojie Yang,Ziwei Huang,Yuchu Yang,Li Feng
Tendon-derived type I collagen is an essential biomaterial for various biomedical devices due to its inherent bioactivity and favorable environment for cells. Correspondingly, microbial and endotoxin contamination can be easily introduced during the collagen extraction process, which is generally overlooked in fundamental scientific research, especially the endotoxin residue. Conventional approaches for mitigating endotoxin exhibit limited effectiveness when applied to biomacromolecule products because of viscosity, clogging, and diminished bioactivity. In this study, we developed a bifunctional sheet that can simultaneously reduce the microbe and endotoxin contamination in collagen solution by co-incubation and subsequent magnetic separation, avoiding the issues of blockage and bioactivity impairment. The bifunctional sheet was successfully fabricated by modifying the magnetic graphene oxide with histamine. Collagen products treated by sheets exhibited reduced microbial and endotoxin contamination while maintaining their bioactivity for encapsulated cell growth. Additionally, inflammatory stimulation of collagen was decreased in vitro and in vivo after treatment. This work may present a facile approach for diminishing microbe and endotoxin residues in collagen products in basic research, obviating the non-essential use of a sterile workshop and facilitating the development of tissue-derived collagen research.
研究领域:
生物医学工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Yabing Zhang,Xiaofeng Dai,Hongbin Shi,Tao Wang
In this work, we demonstrate the catalytic application of magnetic core-shell copper-coated-nickel (Ni@Cu) nanoparticles (NPs) for dimethylamine borane (DMAB) reduced electroless plating copper to fabricate flexible, highly conductive copper patterns. The Ni@Cu NPs, with size of 40 to 46 nm and saturation magnetization of 9.13 emu/g, exhibited strong magnetism, which can be separated by a magnet. Furthermore, the NPs possessed superparamagetism, which meant that the NPs could quickly redisperse in a solvent once the external magnetic field was removed. The core-shell structure of Ni@Cu NPs offered distinct advantages: the nickel core facilitated straightforward magnetic separation, while the copper shell ensured effective dispersion and robust catalytic activity. As the catalyst seeds for electroless plating copper, the Ni@Cu NPs exhibited superior catalytic activity for preparing conductive, adhesive, antioxidative, and bendable flexible copper patterns. The resistivity of the obtained conductive copper patterns was quite low, approximately 1.2 times that of bulk copper. The surface of the copper patterns was smooth, with a relative roughness of 2.67 %, and remained stable under 2000 cycles bending test and 50 cycles 3 M tape test, without any increase in sheet resistance or detachment of the conductive coating. The results of this research will provide new perspectives and basics for the low-cost and large-scale preparation of flexible printed circuits, and will promote the development of the flexible electronics industry towards high efficiency and environmental friendliness.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 21
·3067
·
IF 4.7
Qianqian Li,Boxian Ruan,Yue Yu,Linshu Ye,Aoxiong Dai,Sasha You,Bingshan Zhao,Limin Ren
The removal and detection of highly toxic mercury(II) ions (Hg2+) in water used daily is essential for human health and monitoring environmental pollution. Efficient porous organic polymers (POPs) can provide a strong adsorption capacity toward heavy metal ions, although the complex synthetic process and inconvenient phase separation steps limit their application. Hence, a combination of POPs and magnetic nanomaterials was proposed and a new magnetic porous organic polymer adsorbent was fabricated by a green and mild redox reaction in the aqueous phase with trithiocyanuric acid (TA) and its sodium salts acting as reductive monomers and iodine acting as an oxidant. In the preparation steps, no additional harmful organic solvent is required and the byproducts of sodium iodine are generally considered to be non-toxic. The resulting magnetic poly(trithiocyanuric acid) polymers (MPTAPs) are highly porous, have large surface areas, are rich in sulfhydryl groups and show easy magnetic separation ability. The experimental results show that MPTAPs exhibit good adsorption affinity toward Hg2+with high selectivity, rapid adsorption kinetics (10 min), a large adsorption capacity (211 mg g−1) and wide adsorption applicability under various pH environments (pH 2~8). Additionally, MPTAPs can be reused for up to 10 cycles, and the magnetic separation step of MPTAPs is fast and convenient, reducing energy consumption compared to centrifugation and filtration steps required for non-magnetic adsorbents. These results demonstrate the promising capability of MPTAPs as superior adsorbents for effective adsorption and separation of Hg2+. Based on this, the prepared MPTAPs were adopted as magnetic solid-phase extraction (MSPE) materials for isolation of trace Hg2+from aqueous samples. Under optimized conditions, the extraction and quantification of trace Hg2+in water samples were accomplished using inductively coupled plasma mass spectrometry (ICP-MS) detection after MSPE procedures. The proposed MPTAPs-based MSPE-ICP-MS method is efficient, rapid, sensitive and selective for the determination of trace Hg2+, and was successfully employed for the accurate analysis of trace Hg2+in tap water, wastewater, lake water and river water samples.
研究领域:
环境科学
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Environmental Science-Processes & Impacts
·
2013
·Vol. 16
·期 1
·116-123
·
IF 0
Qiang Lv,Gang Li,Zhuhong Cheng,Hong Lu,Xiaoxia Gao
In order to conveniently and effectively detect the heavy metal ion Hg2+ existing in water, a magnetic fluorescence chemosensor has been strategically prepared by immobilizing a Rhodamine B derivative RhB–tris(2-aminoethyl)amine on Fe3O4@SiO2–Au@PSiO2 composites via gold particles. The adsorption and detection for Hg2+ ions were investigated with fluorophotometry. This chemosensor shows high sensitivity and high selectivity for Hg2+ over other metal cations owing to the ring opening of the rhodamine fluorophore selectively induced by Hg2+. In addition, the presence of Fe3O4 in the sensor also facilitates the magnetic separation of the Fe3O4@SiO2–Au–Hg2+@PSiO2 from the solution.
研究领域:
环境科学
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分析化学
✓ 已验证
DOI
RSC Advances
·
2015
·Vol. 5
·期 68
·55363-55371
·
IF 3.84
Wai Szeto,Jiantao Li,Haibao Huang,Jin Xuan,Dennis Y. C. Leung
Novel urchin-like microparticles with photocatalytic activity and magnetically separable properties were prepared by a layer-by-layer assembly process. Photocatalytic degradation was investigated using two types of mercury vapor lamps: an ozone generating lamp emitting at both 254 nm and 185 nm as well as a germicidal lamp emitting at 254 nm only. This novel photocatalyst demonstrated superior photocatalytic activity in the mineralization of phenol under UVC illumination compared with the commercial P25, Degussa TiO2, especially in repeated usage. Importantly, this photocatalyst can be quickly separated for reuse simply by using a magnet. The merits of 3D spiny nanostructured TiO2 microparticle photocatalysts are high specific surface area, good permeability, reduced charge recombination rate and high catalytic activity while the incorporation of magnetically separable properties enables rapid and easy retrieval of the suspended photocatalyst after use.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
Science Bulletin
·
2017
·
IF 4.092
Wangya Wei,Zumin Wang,Jie Xu,Lingbo Zong,Kun Zhao,Hao Wang,Haiyan Li,Ranbo Yu
Size tunable cobalt hollow nanospheres with high catalytic activity for the ammonia borane (AB) hydrolysis have been synthesized by using the solvothermal method. The complexation between Co 2+ and ethylenediamine is observed to be critical for the formation of the cobalt hollow nanospherical structure. The morphology of the cobalt hollow nanospheres can be regulated by adjusting the original ethylenediamine/ethanol volume ratio, reaction time and temperature. Impressively, the magnetic property study reveals that the coercivity of the as-synthesized cobalt hollow nanospheres is much enhanced compared with that of bulk cobalt materials. Meanwhile, Co/Pt bimetal hollow nanospheres (CoPtHS) and graphene-cobalt hollow composite nanospheres (CoHS-rGO) have also been explored. In comparison with the cobalt hollow nanospheres, both the CoPtHS and CoHS-rGO show higher catalytic activities and better repeatability for the catalytic hydrogen generation from AB hydrolysis. Moreover, it is noted that these catalysts could be recycled by using the magnetic separation method.
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Food Chemistry-X
·
2024
·
IF 6.5
Xin-Jie Song,Fei Ye,Yao Zhang,Juan Sun,Xuping Shentu,Xiaoping Yu,Wei Li,Yuan-Feng Wu
In this study, a fluorescence detection method combining aptamer-modified up-conversion nanoparticles (UCNPs) and magnetic nanoparticles (MNPs) was developed for detection of Clenbuterol (CLB). The aptamer-modified magnetic NPs captured CLB, which reacted with the aptamer-modified UCNPs and generated a sandwich complex. The aptamer-modified UCNPs acted as a fluorescence source. The MNP-CLB-UCNP complex was retrieved from the solution using an magnetic field, and the fluorescence intensity was detected by fluorescence spectrophotometry with excitation and emission spectra at 980 nm and in the 400–800 nm region, respectively. The results showed that the fluorescence intensity gradually increased with increasing concentrations of CLB with a good specify. The method was highly sensitive for the quantification of CLB, with a limit of detection of 0.304 ng mL −1 . The recovery rate of CLB from pork samples ranged from 84 % to 94.87 %. This fluorescence method enables the sensitive, precise, and accurate quantification of CLB residues in pork samples.
研究领域:
分析化学
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食品安全
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生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Ting Luo,Xianhua Hou,Qian Liang,Guangzu Zhang,Fuming Chen,Yingchun Xia,Qiang Ru,Lingmin Yao,Yuping Wu
In this work, it is successfully achieved to synthesize the three-dimensional flowerlike Ni (1-x) Mn x Fe 2 O 4 (x = 0, 0.02, 0.04, 0.06, 0.08, 0.1) by an environmental hydrothermal method . The morphology and structure of as-prepared Ni (1-x) Mn x Fe 2 O 4 are characterized via X-ray diffraction, scanning electronic microscopy and nitrogen adsorption-desorption isotherms, besides, the magnetic properties of the samples is revealed by vibrating sample magnetometer . The results show that the Ni (1-x) Mn x Fe 2 O 4 are cubic spinel phase with three-dimensional flowerlike microspheres structure assembled by nanosheets , which is exhibited the good performance to remove Congo red (CR). Besides, the samples with good magnetic properties facilitates magnetic separation for CR solution. The kinetics and isotherm of adsorption process are studied via a UV–visible spectrophotometer. The adsorption process is found to fit the pseudo-second-order kinetic model and Freundlich isotherm model better. Moreover, the adsorption capability of CR on Ni (1-x) Mn x Fe 2 O 4 has a great enhancement by the appropriate doping of Mn 2+ ions. In order to research the mechanism of the CR adsorption process, the effect of pH value and the surface group of the samples and CR are measured. Due to the doping of Mn 2+ ions, the surface activity of Ni (1-x) Mn x Fe 2 O 4 has been changed and the adsorption capability (231.74546 mg g −1 ) of CR on Ni 0.98 Mn 0.02 Fe 2 O 4 is maximum in the all samples at pH 5. This research suggests that appropriate doping of Mn 2+ ions could enhance the adsorption performance for CR, which provides a new idea for the development of adsorbent.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY CONVERSION AND MANAGEMENT
·
2018
·
IF 6.377
Lei Shi,Yurong He,Xinzhi Wang,Yanwei Hu
In recent years, nanoscale particles have been applied in the utilisation of solar energy due to their excellent properties. In light of the multiple functions of composite nanoparticles, some solar-assisted systems have been developed and exhibited comprehensive photoelectric and photo-thermal transformation effects. However, the presence of nanoparticles in these systems can cause secondary pollution and severely limit large-scale application of the solar technology. Herein we developed a recyclable photo-thermal conversion and purification system based on Fe 3 O 4 nanoparticles decorated with TiO 2 nanoparticles, which could be separated from water under the action of a magnetic force. Under the solar illumination power of 1 sun (1 sun = 1000 W·m −2 ), thermal receiver efficiency of 76.4% and Rhodamine B degradation efficiency of 85% were obtained with a 0.1 g/L Fe 3 O 4 @TiO 2 nanofluid. With the increase of the solar illumination power, the degradation efficiency has been increased to 94%. The recovery rate and efficiency could be controlled by adjusting the magnetic field strength and the magnetic property of Fe 3 O 4 @TiO 2 nanoparticles. This study provides an approach to not only significantly reduce material consumption in the design of solar devices, but also to realise broad solar energy applications for water purification and photo-thermal conversion.
研究领域:
材料科学
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环境科学
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能源科学
✓ 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）