Journal of Cleaner Production
·
2023
·
IF 11.1
Jiayi Li,Weixing Han,Heyao Liu,Minhua Su,Diyun Chen,Gang Song
The development and use of clean energy produced by nuclear power plants is becoming a major international trend, but it will inevitably lead to the problem of radionuclide pollution. Radioactive nuclear wastewater containing Cs and U and produced as a byproduct of coastal nuclear power production can cause substantial environmental pollution . In order to simultaneously remove radioactive cesium and uranium, polydopamine (PDA) inlaid ammonium phosphomolybdate (AMP) has established a hydrophilic functional structural film on the surface of Fe 3 O 4 , forming AMP@PDA@Fe 3 O 4 (APF) which is used to simultaneous remove Cs(I) and U(VI). Using the pH sensitive range of APF adsorption in the process of adsorbing Cs(I) and U(VI), synergistic adsorption can be achieved under the condition of weak acidity to neutral. The effects of temperature, and common cations on Cs(I) and U(VI) adsorption by APF were investigated, the adsorption was found to be sensitive to the presence of K + . The efficiency of Cs(I) and U(VI) adsorption by APF was 99.88% and 98.39%, respectively. The Cs(I) adsorption process was primarily ion exchange with NH 4 + within APF composite, whereas that for U(VI) was primarily C-O complexation. Both the Cs(I) and U(VI) adsorption reactions were consistent with second-order kinetic and Langmuir isothermal adsorption models. After five cycles of experiments the removal efficiency of Cs(I) and U(VI) can reach 64.88% and 79.81%, respectively. APF was also found to have high selectivity for Cs and U in seawater with high salt content at pH 6.0–7.0. In mimic contaminated seawater, the efficiency of Cs(I) and U(VI) removal was 97.65% and 84.63%, respectively. These findings provide references for the remove of Cs(I) and U(VI) from radioactive wastewater , making the process of energy production safer.
研究领域:
环境科学
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材料科学
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核能工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Libo Sun,Qingtai Xie,Heshun Jing,Jindong Xie,Wenyu Tan,Baorong Duan,Xun Sun,Caixia Qi,Huijuan Su
The development of nanogold catalysts with high activity and high stability is of great significance for their industrial applications. In this paper, Au-PDA@Fe 3 O 4 catalysts were prepared through the gold sol adsorption method. First, micron-sized magnetic Fe 3 O 4 spheres were synthesized via a solvothermal method, serving as the core to endow the catalyst with excellent recyclability. Subsequently, a layer of polydopamine (PDA) shell was polymerized on the magnetic core surface. By controlling the timing of introducing the gold sol containing Au nanoparticles (NPs), the spatial position of Au NPs within the PDA layer was regulated, leading to a series of magnetic core-shell nano gold catalysts with varying spatial positions of Au. Using the 4-nitrophenol (4-NP) hydrogenation as the probe, the influence of Au spatial position, Au size, and other conditions on the catalytic performance was investigated. Results showed that, in the prepared Au-PDA@Fe 3 O 4 -16 catalyst, the Au NPs are encapsulated within the PDA shell and positioned close to the outer layer. This not only provides remarkable stability to the Au NPs but also maintains their proximity to the surface of the PDA shell, allowing easier access of the substrate 4-NP to the Au NPs and conferring good reactivity upon the catalyst. The strong electron metal-support interaction between PDA and Au enables PDA to effectively stabilize Au NPs. The prepared Au-PDA@Fe 3 O 4 -16 catalyst exhibits excellent stability, maintaining a high conversion rate of 91 % even after 14 cycles of use. Our findings not only deepen the understanding of the catalytic mechanisms involved but also pave the path towards the creation of highly efficient and robust gold-based catalysts, facilitating their widespread utilization in industrial applications.
研究领域:
材料科学
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催化化学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2025
·Vol. 15
·期 2
·175
·
IF 4
Wei Wang,Jiaqi Liu,Guang Shi,Shiqi Wu,Shihan Zhang,Ruixia Yuan
A magnetic shell-structured nano-catalyst was prepared by self-polymerization of dopamine wrapped by ferric oxide as the carrier, which was loaded with palladium nanoparticles (Pd/PDA@Fe3O4). The presence of magnetic Fe3O4made it easy for nanoscale palladium particles to recover and prevent the loss of palladium nanoparticles that is unavoidable in traditional usage and preparation procedures. The catalyst was characterized by X-ray diffraction, fourier transform infrared spectroscopy, scanning electron microscopy, thermal weight loss analysis, Raman spectroscopy, X-ray photo-electron spectroscopy, and magnetic properties analysis. The catalytic performance of the prepared catalyst was investigated taking 4-nitrophenol (10 mg/L) and rhodamine B (15 mg/L) as the target pollutants. The results showed that under the conditions of 35 °C, pH = 7 and a catalyst dosage of 3 mg, the catalytic reduction efficiency of 4-nitrophenol, rhodamine B, and the mixture of them all can reach 99%. The catalytic efficiency of Pd/PDA@Fe3O4remained above 90% after being used 10 times. The shell structure of Fe3O4made it possible and easy to recover and recycle the nanoscale palladium, which was a real problem in the usage of nano-catalysts. At the same time, the problem of separation and recovery of palladium nano-catalyst is solved by magnetism, which provides research ideas for the recycling and utilization of nano-materials.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
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2024
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IF 8.1
Cunkuan Zhang,Xiaolan Zeng,Xiaotang Xu,Wenbo Nie,Brajesh Kumar Dubey,Wenchuan Ding
Anode modification is an effective strategy for enhancing the electrochemical performance of microbial fuel cell (MFC). However, the impacts of the modified materials on anode biofilm development during MFC operation have been less studied. We prepared a novel PDA-Fe 3 O 4 -CF composite anode by coating original carbon felt anode (CF) with polydopamine (PDA) and Fe 3 O 4 nanoparticles. The composite anode material was characterized by excellent hydrophilicity and electrical conductivity, and the anodic biofilm exhibited fast start-up, higher biomass, and more uniform biofilm layer after MFC operation. The MFC reactor assembled with the composite anode achieved a maximum power density of 608 mW m −2 and an output voltage of 586 mV, which were 316.4% and 72.4% higher than the MFC with the original CF anode, respectively. Microbial community analysis indicated that the modified anode biofilm had a higher relative abundance of exoelectrogen species in comparison to the unmodified anode. The PICRUSt data revealed that the anodic materials may affect the bioelectrochemical performance of the biofilm by influencing the expression levels of key enzyme genes involved in biofilm extracellular polymer (EPS) secretion and extracellular electron transfer (EET). The growth of the anodic biofilm would exert positive or negative influences on the efficiency of electricity production and electron transfer of the MFCs at different operating stages. This work expands the knowledge of the role that anodic materials play in the development and electrochemical performance of anodic biofilm in MFCs.
研究领域:
环境工程
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微生物学
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电化学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2020
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IF 6.182
Shuying Shi,Chonghe Xu,Qing Dong,Yuping Wang,Silun Zhu,Xiaoqian Zhang,Yuk Tak Chow,Xinqiang Wang,Luyi Zhu,Guanghui Zhang,Dong Xu
The functionalized MnO 2 /PDA/Fe 3 O 4 fibers were synthesized to removal Pb(II) from wastewater. MnO 2 nanosheets were in-situ loaded on the high saturation magnetization Fe 3 O 4 fibers matrix through a polydopamine (PDA) intermediate platform. The high Fe 3 O 4 content enabled the composite fibers to achieve rapid magnetic separation. The perpendicularly orientated MnO 2 nanosheets coated on the fibers could avoid agglomeration and give full play to their outstanding adsorption performance. The maximum Pb(II) adsorption capacity at 300 K, 308 K and 318 K calculated by Langmuir model could reach 196.67, 200.45 and 205.07 mg/g, respectively; all of which were higher than those of most reported MnO 2 based adsorbents. Thermodynamics showed that the fibers had spontaneously physicochemical adsorption of Pb(II). The composite fibers adsorbents had excellent Pb(II) selective adsorption and reusability. In addition, under the laboratory simulation test conditions, the fibers exhibited an excellent Pb(II) treated capacity of ~2500 and 6500 kg wastewater per kg adsorbents. This could dramatically purify wastewater from 10 mg/L to below 0.01 mg/L and 0.1 mg/L. The prepared MnO 2 /PDA/Fe 3 O 4 fibers had excellent adsorption capacity and actual treated capability for Pb(II), which could bring about rapid magnetic separation and offer great application potential in Pb(II) adsorption removal.
研究领域:
环境科学
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材料科学
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水处理技术
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吸附材料
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纳米复合材料
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Xiaolei Zhang,Dongjun Lv,Zhongmin Liu,Fan Yang,Qi Tang,Nan Gao,Zong Tan,Peng Du,Jinyang Li,Jiahao Wang
Microplastics and dye pollutants threaten aquatic ecosystems and human health, prompting the need for sustainable solutions. Converting industrial solid waste into value-added adsorbents provides an effective remediation pathway. In this work, industrial solid waste—fly ash cenospheres—was transformed into a value-added adsorbent (PMFL) by coating with polydopamine (PDA) and Fe 3 O 4 , imparting magnetic recoverability and high adsorption capacity for polystyrene (PS) microplastics (312.00 mg/g). To further improve practical applicability and broaden pollutant removal capacity, PMFL was immobilized within a chitosan matrix to form a monolithic CS@PMFL composite. This structure not only enables facile recovery but also exhibits strong adsorption affinity toward both PS microplastics and Congo red dye. Mechanistic investigations indicated that adsorption involved a combination of electrostatic, chemical, and physical interactions, including π–π stacking, hydrogen bonding, hydrophobic effects, surface complexation and physical entrapment. The materials maintained high adsorption performance across a wide range of pH and ionic conditions, demonstrating robust environmental adaptability. Overall, this study presents a scalable approach for converting industrial waste into multifunctional adsorbents capable of simultaneously removing diverse pollutants.
研究领域:
环境科学
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材料工程
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污染修复
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纳米复合材料
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可持续化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Heshun Jing,Qingtai Xie,Huijuan Su,Yuqi Zhai,Xun Sun,Baorong Duan,Lijun Zhao,Miao Zhang,Caixia Qi,Libo Sun
The research and progress of noble metal catalysts possessing good stability and extended service life holds significant importance in enhancing catalytic efficiency, reducing enterprise costs, and fostering sustainable social development. Here, a hollow magnetic h-Au/PDA@PDA@Fe 3 O 4 catalyst with a double-layer PDA structure was prepared to optimize the stability of gold nanoparticles (NPs) using for the 4-nitrophenol (4-NP) reduction. The research indicates that, despite the initial activity of h-Au/PDA@PDA@Fe 3 O 4 , with a mass-normalized rate ( k’ ) of 176.10 s −1 ·g Au -1 and a Turn Over Frequency (TOF) of 1757 h −1 , being smaller than h-Au/PDA@Fe 3 O 4 with a single-layer structure ( k’ = 461.76 s −1 ·g Au -1 , TOF = 6387 h −1 ), h-Au/PDA@PDA@Fe 3 O 4 exhibits significantly superior stability compared to h-Au/PDA@Fe 3 O 4 . After undergoing 12 cycles of use, the conversion rate of h-Au/PDA@PDA@Fe 3 O 4 decreased by only 4.3 %. After cyclic reaction, the conversion rate of h-Au/PDA@Fe 3 O 4 decreased by as much as 64.8 %. The distinctive hollow double-layer structure of h-Au/PDA@PDA@Fe 3 O 4 , along with the interaction between Au and PDA, contributes significantly to its exceptional activity and stability. The research presented in this paper offers valuable insights and guidance for the suitable construction and industrial application of gold-based nano catalyst with good activity and cyclic stability.
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Wei Zhang,ChengLin Zheng,Song Feng,Xinfei Zhang,Jianing Lin
Interfacial water states are regulated by PDA@Fe 3 O 4 -crosslinked PVA. • Heat localization and mass transport are balanced via triple-layer hydrogels. • Optimized H-bond relaxation kinetics are revealed by spectroscopy and MD. • Hypersaline wastewater treatment is achieved by the robust system. Solar-driven interfacial evaporation (SIE) holds immense potential for decentralized clean water production, yet intrinsic transport bottlenecks and high kinetic barriers of vaporization often limit its practical outputs. Here, we present a functionally graded triple-layer evaporator designed through interfacial barrier engineering to decouple heat localization from mass transport. By constructing a hydration-regulated gradient—comprising a photothermal PDA@Fe 3 O 4 top-layer, a crosslinking-tuned intermediate hydrogel, and a macroporous scaffold—we demonstrate precise control over water states. Crucially, our results suggest that the evaporation enhancement is more closely associated with interfacial water-state regulation and hydrogen-bond relaxation behavior than with a simple ‘enthalpy reduction’ interpretation, as consistently supported by the combined spectroscopic observations and molecular dynamics analysis. This gradient architecture enables an evaporation rate of 3.10 kg m −2 h −1 with approximately 92% efficiency under one-sun. Our work provides a mechanistic framework for overcoming the transport-energetics trade-off in SIE, offering a robust solution for treating diverse hypersaline and complex wastewater.
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Zhaojian Gao,Shuai Zhou,Yingmei Zhou,Hongri Wan,Cai Zhang,Bing Yao,Teng Chen
In this work, a feasible collaborative design method for preparing magnetic superhydrophobic PU-PDA-Fe 3 O 4 -Ag sponge was proposed. Inspired by mussels, polydopamine (PDA) was used as a bio-glue to adhere Fe 3 O 4 , Ag nanoparticles and octadecylamine to the skeleton of the PU sponge. Under the synergistic effect, Fe 3 O 4 , Ag nanoparticles and octadecylamine endowed the PU sponge with magnetic response properties, antibacterial activity and superhydrophobic surface. The obtained superhydrophobic PU-PDA-Fe 3 O 4 -Ag sponge showed high absorption capacity for various oils and organic solvents with up to 22.9–52.0 times its own weight, which possessed a comparable or relatively high adsorption capacity compared with other reported superhydrophobic PU sponges. Due to the magnetic properties and good elasticity of the obtained PU sponge, the adsorbed oil can be quickly circulated through magnetic recovery and mechanical extrusion. After 20 absorption-desorption cycles, the adsorption capacity of the modified sponge remained above 90.9 % of the initial value, and under negative pressure, the sponge can be used as a filter for continuous separation of light oil and heavy oil from water. In addition, the surface-modified PU sponge also shows excellent oil-in-water emulsion degreasing performance, and the separation efficiency of toluene in water can reach 96.4%. Interestingly, the resulting PU sponges exhibited antibacterial activity with the action of Ag nanoparticles, indicating their potential environmental adaptability and durability in bacteria-contaminated oil/water mixture. The multifunctional characteristics of the modified polyurethane sponge prepared in this study have great potential for the practical application of oil spill treatment.
研究领域:
材料科学
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环境科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2024
·
IF 4.8
Yingjun Li,Yingchun Lu,Yunpeng Li,Hanwen Duan,Chaoyi Zhu,Yuanlin Zhou
The strategic alignment of nanoplatelets within polymer matrices is pivotal for the development of nanocomposites with superior gas barrier characteristics. In this work, the effect of lamellar particles orientation in polymer for gas permeation was demonstrated. The magnetic α-Al 2 O 3 (Al 2 O 3 @PDA-Fe 3 O 4 ) was first prepared by in situ growth of Fe 3 O 4 nanoparticles immobilized on polydopamine (PDA)-modified Al 2 O 3 surface. Subsequently the orientation of magnetic α-Al 2 O 3 in brominated butyl rubber (BIIR) was achieved by modulating the applied magnetic field direction. Results show that the PDA, as the role of surface adhesive, not only anchored Al 2 O 3 substrate but also bound ferric ions for the further in situ formation of Fe 3 O 4 , which ensured the physico-chemical stability of the magnetic α-Al 2 O 3 . Comparison of hydrogen permeation performance of composites with in-plan, middle-of plane and out-of plane alignment demonstrated the effect of lamellar particles orientation. The Al 2 O 3 @PDA-Fe 3 O 4 /BIIR composite with in-plane alignment had the best hydrogen barrier property by a 50% reduction in hydrogen permeability coefficient compared to the neat BIIR, underscoring the critical role of particle orientation in enhancing the gas barrier properties of nanocomposites. Highlights The structural stability of magnetic Al 2 O 3 nanocomposites was enhanced by polydopamine (PDA). The composites with in-plane alignment, middle-of plane alignment and out-of plane alignment were prepared by a magnetic field. The effect of lamellar particles orientation on gas permeation of polymer nanocomposites was studied. The composites with in-plane alignment possesses the best gas barrier property.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2019
·Vol. 26
·期 23
·23981-23993
·
IF 2.914
Li Lincheng,Zhong Dengjie,Xu Yunlan,Zhong Nianbing
In order to improve the adsorption efficiency of the adsorbent and solve the problem of separation difficulty, a novel superparamagnetic micro-nano-bio-adsorbent (PDA/Fe 3 O 4 /BC) was prepared by in situ self-assembly of polydopamine (PDA). The results of scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transform infrared spectrometer (FT-IR), X-ray photoelectron spectrometer (XPS), and vibrating sample magnetometer (VSM) characterization showed that the size of bio-adsorbent was about 200 nm. PDA and Fe 3 O 4 modifications increased the specific surface area of adsorbent, changed the surface functional group of biochar (BC), and made the adsorbent have super-high magnetization (294.76 emu g −1 ). PDA/Fe 3 O 4 /BC was applied to treat Cr wastewater. The results show that the adsorption of Cr by PDA/Fe 3 O 4 /BC includes single-layer and multilayer adsorption. The adsorption follows the pseudo-second-order kinetic model. The adsorption is spontaneous and endothermic, and its maximum adsorption capacity and activation energy are 25.25 mg g −1 at 318 K and 23.108 kJ mol −1 , respectively. After adsorption treatment, PDA/Fe 3 O 4 /BC still possesses high magnetization (233.04 emu g −1 ). PDA/Fe 3 O 4 /BC can treat actual electroplating wastewater with Cr(VI) concentration from 20 mg L −1 to less than 0.2 mg L −1 , which met the PRC discharge standard (GB/21900-2008) of electroplating pollutants.
Graphical abstract
研究领域:
环境科学
·
环境工程
·
纳米材料
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水污染治理
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应用化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）