BIORESOURCE TECHNOLOGY
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2026
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IF 8.2
Kaiqiang Li,Jiajiang Lin,Zhibiao Chen,Zuliang Chen
Kaolin wastewater upcycled into bio-inorganic composite for dual iron and REE recovery. • DIRB drives in situ FeNPs synthesis; bacterial removal triggers aggregation and collapse. • 95% heavy REE removal (Tb, Ho, Er, Yb) in real mining wastewater with 13 competing REEs. • Microbial dissolved organic matter stabilizes FeNPs, enhancing dispersion and electron transfer. Iron-based adsorbents are predominantly synthesized from chemical iron salts, leading to additional resource consumption and secondary environmental burdens. In contrast, the conversion of iron-containing industrial waste into functional recovery materials has received limited attention. This study addresses the dual challenges of hazardous kaolin bleaching wastewater disposal and REE resource loss by developing a novel “waste-derived material for waste treatment” strategy. Specifically, we employed kaolin bleaching wastewater as an unconventional iron source to construct a sustainable bio-inorganic composite, FeNMs@DIRB, enabling simultaneous resource recycling and pollution control. The key innovation lies in utilizing dissimilatory iron-reducing bacteria (DIRB) to biosynthesize FeNMs@DIRB in situ, where microbial components prove indispensable for performance. Results demonstrate that DIRB successfully reduced Fe (II) from wastewater to form FeNMs, with 3D-EEM analysis confirming that microbial dissolved organic matter participated in nanomaterial formation and surface immobilization. The composite exhibited inherent selectivity (Gd > Y > La) in simplified systems, and achieved >95% removal for heavy REEs (Tb, Ho, Er, Yb) in real mining wastewater containing 12 REEs, maintaining selectivity under complex conditions. Notably, FeNMs@DIRB maintained satisfactory adsorption–desorption performance over three consecutive cycles and showed lower iron leaching across pH 4.0 and 8.0, confirming its structural stability and reusability. These results establish FeNMs@DIRB as a robust, selective adsorbent derived entirely from waste streams, offering a sustainable paradigm for REE recovery from complex industrial effluents. Download: Download high-res image (126KB) Download: Download full-size image
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Sustainability
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2026
·Vol. 18
·期 16
·8079
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IF 4.1
Hao Liu,Deli Wu,Yufan Chen,Chengsi Hou,Guojie Ye,Zhengwei Zhou,Yue Wang
4-Chlorophenol (4-CP) is a persistent and highly toxic pollutant commonly found in groundwater. However, its efficient degradation remains challenging due to the rapid agglomeration of conventional zero-valent iron (ZVI) nanoparticles, their narrow pH operating range, and the environmental risks associated with synthetic chelating agents. To address these limitations, this study presents a rationally designed catalytic system integrating cyclodextrin polymer (CDP)-supported bimetallic Cu-Fe nanoparticles (Cu-Fe-CDP) with citric acid (CA) as a green complexing agent. The porous CDP matrix effectively mitigates nanoparticle agglomeration and provides abundant active sites, while the Fe-Cu bimetallic coupling accelerates electron transfer and iron corrosion. Critically, CA acts as a biocompatible ligand that sustains Fe(II)/Fe(III) redox cycling, expands the effective pH range, and enhances hydroxyl radical (·OH) generation. The system achieves 92.13% degradation of 4-CP within 80 min at pH 9.0 and nearly complete removal at pH values between 3.0 and 7.0. Mechanistic studies, including electron paramagnetic resonance (EPR) spectroscopy and radical quenching tests, confirm the dominance of ·OH radicals (82.67% inhibition by TBA) and the essential role of surface Fe(II)/Fe(III) cycling. The catalyst exhibits excellent reusability, broad-spectrum activity toward multiple pollutants, and sustained performance in real water matrices and long-term column tests with minimal metal leaching. This work demonstrates a chemically robust strategy for chlorophenol remediation using green citric acid and biodegradable CDP without exogenous oxidant addition, showing promise for further development toward practical applications.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Shan Huang,Lingyun Huang,Qi Zuo,Jian Liu,Jiushuai Deng
This study addresses the selectivity challenge in the flotation separation of fine cassiterite from calcium-containing gangue minerals, particularly calcite, by developing a Fe 3 + -CMC depressant system. Micro-flotation tests demonstrated that this system significantly improved separation efficiency: compared to using CMC alone, the SnO 2 recovery increased by 54.23–85.79 % (at a grade of 85.63 %), while the calcite recovery was depressed to 11.66 % (a reduction of 3.36 percentage points). The mechanism was systematically elucidated through contact angle measurements, solution chemistry calculations, surface characterization (Zeta potential, FTIR, XPS, AFM), and theoretical simulations (MD, DFT). The results indicate that Fe³ ⁺ mainly exists as Fe(OH)₃ in the pulp, which adsorbs on the cassiterite surface via hydroxyl groups and on the calcite surface through oxygen sites in CO₃²⁻. CMC consumes Fe³ ⁺ adsorbed on the cassiterite surface, while Fe³ ⁺ on the calcite surface provides additional adsorption sites for CMC, thereby enhancing its selective coverage. The stable Fe(OH)₃-CMC configuration promotes multilayer adsorption, effectively increasing cassiterite recovery while depressing calcite. This strategy, leveraging the synergistic effect of metal ion pretreatment and an organic depressant, offers a feasible approach for the efficient beneficiation of complex tin ores.
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APPLIED SURFACE SCIENCE
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2026
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IF 6.6
Xi Zhu,Zhikun Li,Bolong Liang,Shijie Xing,Hongbin He,Xiliang Li,Shu-Xuan Liang
The continuous contamination of ciprofloxacin (CIP) pharmaceutical residues poses a potential risk to the ecological environment and human health. Using semiconductor materials with optimized heterojunctions for photodegradation is an effective way for the CIP removal. In this study, Fe-ZnO/CdS Z-type heterojunction was synthesized, and used for the photodegradation of organic pollutants. The Fe-doping brought abundant surface oxygen vacancies to ZnO, which could effectively promote interfacial electron transfer. In addition, the valence transition of Fe (II)/Fe (III) could effectively participate in the redox cycle and improve the carrier transfer efficiency. The construction of Z-type heterojunction facilitated the separation of photogenerated carriers, and the photogenerated electrons in the conduction band of CdS reduced oxygen to produce superoxide radicals as the main active radicals. A series of photoelectric characterizations had proved that the introduction of CdS could effectively improve the visible light utilization rate and photogenerated carrier separation efficiency. The Fe-ZnO/CdS system achieved 90.0% degradation efficiency of CIP within 120 min under visible light. Impressively, Fe-ZnO/CdS heterojunction showed practical degradation capability in complex aqueous environments and excellent reusability. This study provided an effective strategy for the design of metal oxide-based photocatalysts and offered a new idea for the removal of drug residual contaminants.
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ACS Applied Materials & Interfaces
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2026
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IF 7.8
Renjie Liu,Yongjun Zhang,Zhenli Zhang,Hongjing Han,Haiying Wang,Yuting Guan,Yanan Zhang,Bolong Jiang,Xuzhong Gong,Enhao Sun,Yanguang Chen
Coke deposition is a key obstructive problem to be solved in the production of ethylene via steam cracking; moreover, the removal of graphitic carbon in coke is particularly difficult. A strategy integrating Fe–Mn bimetallic synergy at the B-site with oxygen vacancy engineering in perovskites was proposed to accelerate the catalytic conversion of coke/graphitic carbon via steam. DFT simulations and experimental results revealed that Mn incorporation induces dynamic lattice reconstruction of SrFeO3, generating abundant oxygen vacancies that enhance oxygen ion mobility and H2O adsorption. The interaction between Fe and Mn atoms has been observed to narrow the band gap, strengthen the hybridization of the O-2p and Fe-3d orbitals, induce electron delocalization, regulate the transfer of electrons from surrounding atoms to the adsorbed oxygen species, and thus accelerate the desorption and activation of *OH and the transfer of *O2–, which provides the possible reaction pathway for the transformation of graphitic carbon into CO or CO2. At 900 °C, the conversion of graphitic carbon and coke with steam catalyzed by SrFe0.1Mn0.9O3 reached 60.61% and 99.87%, respectively. This study provides an active material that facilitates the in situ online decoking strategy for catalytic coatings on steam cracking furnace tubes along with theoretical insights into the underlying reaction mechanism.
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PubMed
高影响因子
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
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2026
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IF 6.2
Yulong Yang,Lifen Su,Rong Liu,Haoming Xie,Zijie Liu,Bin Yang,Jibin Miao,Ru Xia,Jiasheng Qian,Lei Miao
The solar-driven evaporation of water is deemed as the most promising technology for producing freshwater. However, the complex recalcitrant organic pollutants will contaminate and even shorten the life time of the photothermal materials. Herein, the vertically aligned Fe-doping carbon nanosheets (Fe/CNSs) aerogel were constructed to produce fresh-water from sewage. The porous vertically oriented structure was built by using melem as carbon resource via the ice-templating method. The carbon nanosheets were grown in-situ on the vertically aligned skeletons of melem under the catalysis of ferrocene. The obtained Fe/CNSs composites exhibit excellent hydrophilicity and sunlight absorption as high as 97.3%, resulting in an outstanding solar evaporation efficiency of 91.7% and completely degradation of organic pollutants (methylene blue, methyl orange, tetracycline hydrochloride and bisphenol A) under 1 sun irradiation (1 kW m −2 ) synergistically. The Fe atoms doped in the carbon nanosheets, which accelerate the generation and transportation of radicals via the photo-Fenton, leading to a rapid degradation efficiency and address the issue of Fe recycling. This work provides a promising strategy for treating the wastewater containing refractory pollutants, such as industrial, dyeing and pharmaceutical wastewaters.
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ENVIRONMENTAL RESEARCH
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2026
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IF 8.2
Zhiyan Hou,Siyu Jin,Liuqun Fan,Xiuling Yan,Seitkhan Azat,Jinxiong Wu,Xintai Su
Large amounts of oily sludge generated during petroleum production pose dual challenges, including severe environmental risks and the inefficient utilization of intrinsic functional elements. Herein, hierarchical porous carbon nanosheets derived from acid-pretreated oily sludge (denoted as HOS) are prepared through a three-step process involving acid pretreatment, controlled pyrolysis, and post-activation, without introducing any external iron or nitrogen precursors. Benefiting from precursor-level regulation of intrinsic iron and nitrogen species, the optimized sample (HOS-8) exhibits a two-dimensional nanosheet architecture, hierarchical porosity, a high specific surface area, and abundant Fe–N x active sites. These structural and chemical features collectively facilitate rapid ion/electron transport and efficient charge storage. As a result, HOS-8 delivers a high specific capacitance of 333 F g -1 , excellent rate capability with 79.4% capacitance retention at 10 A g -1 , and outstanding cycling stability with 95.5% retention after 10,000 cycles. A symmetric supercapacitor device assembled using HOS-8 achieves an energy density of 13.6 Wh kg -1 , outperforming many reported heteroatom-doped carbon electrodes. This work demonstrates a feasible strategy for converting iron- and nitrogen-containing oily sludge into functional carbon materials and provides insights into the rational design of waste-derived electrodes for energy storage applications.
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Inorganics
·
2026
·Vol. 14
·期 3
·88
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IF 3.4
Naifeng Chen,Yi Li,Chenxia Gao,Chao Xue,Shuang Liu,Jinghang Li,Xi Cao,Kuilin Lv,Yuguang Lv
This study systematically investigated the characterization of 2Fe-CDs/12Mn-CeO2composites and the colorimetric sensing properties of H2O2, glucose (Glu), and glutathione (GSH). The morphology, structure, and optical properties of the 2Fe-CDs/12Mn-CeO2composite were analyzed in detail by XRD, FT-IR, SEM, TEM, XPS, and Raman spectroscopy, and its formation was supported by multiple complementary characterization techniques. The catalytic efficiency (kcat/Km) of the nanozyme is 152-fold higher than natural HRP under optimal conditions and remains 59-fold higher even after temperature normalization to 25 °C. In the colorimetric sensing experiments, the detection limits of Fe-CDs/Mn-CeO2were 0.21 μM, 2.7 μM, and 0.63 μM for H2O2, Glu, and GSH, respectively. Rapid and accurate determination of the concentrations of these biomolecules can be achieved by observing the color changes after Fe-CDs/Mn-CeO2reaction with the objects to be measured. The experimental results show that Fe-CDs/Mn-CeO2have high sensitivity and selectivity for H2O2, Glu, and GSH, which provides a solid theoretical and experimental basis for the application of Fe-CDs/Mn-CeO2in the field of biosensing and medical diagnosis.
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Journal of Materials Chemistry A
·
2026
·
IF 9.2
Xiaoyi Fu,Xia Lei,Yanyi Wang,Shuyu Cui,Junjie Hu,Tian Lang,Xiaolong Zhou,Sarayut Tunmee,Suttipong Wannapaiboon,Xingzhu Wang,Xiongwei Zhong,Baomin Xu
Developing efficient and durable electrocatalysts for the oxygen evolution reaction (OER) is crucial to advancing rechargeable zinc–air batteries (ZABs). In this work, we rationally design a series of Fe-doped double perovskite oxides (BaPrCo2−xFexO5+δ, denoted BPCF-x) to elucidate the interplay among Fe incorporation, lattice oxygen activity, and OER performance. Comprehensive structural and spectroscopic analysis reveal that Fe doping effectively tailors the electronic configuration and modulates the oxygen vacancy concentration, thereby accelerating charge transfer kinetics. Notably, BPCF-0.8 exhibits the lowest overpotential of 295 mV at 10 mA cm−2 and a Tafel slope of 45 mV dec−1, outperforming the pristine BPC catalyst. Optimized Fe incorporation promotes the lattice oxygen mechanism pathway while preserving structural integrity, as confirmed by OER tests in various pH electrolytes. Furthermore, the ZAB using BPCF-0.8 as the air cathode catalyst delivers high power density and excellent long-term durability, sustaining stable operation for over 500 h. This work elucidates how Fe doping activates lattice oxygen and balances oxygen vacancies, providing valuable insights into cation substitution engineering and lattice oxygen regulation in perovskite electrocatalysts.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Yuan-Yuan Feng,Hua-Shuai Hu,Jin Liu,Zi-Heng Liu,Dan Zhang,Dong-Xing Tan
● S,Fe-NiFeO x H y /NF shows an ultra-low OER overpotential of 305 mV at 1000 mA cm −2 . ● The catalyst exhibits a promising stability for over 40 h without activity decay. ● The total preparation process of S,Fe-NiFeO x H y /NF electrocatalyst only takes 6 min. ● The high performance stems from electronic interactions among S, Fe and NiFeO x H y . Water electrolysis is considered an ideal route for producing high-purity hydrogen, yet its widespread application remains severely constrained by the anodic sluggish oxygen evolution reaction (OER). Herein, we present a high-performance S,Fe-NiFeO x H y /NF electrocatalyst for OER that markedly reduces the overpotential of OER to 196 mV at the benchmark current density of 10 mA cm −2 . Even at high current densities of 500 and 1000 mA cm −2 , the overpotentials are only 291 and 305 mV, respectively, outperforming most previously reported Ni/Fe-based catalysts. The catalyst also exhibits promising long-term stability, maintaining a high current density of 500 mA cm −2 for over 40 h without activity decay. Notably, the entire catalyst preparation takes just 6 min, and this cost-effective and facile synthetic strategy is key to enabling practical water electrolysis. Our findings open up a new avenue for developing non-noble metal catalysts with both high activity and durability for water electrolysis. Download: Download high-res image (267KB) Download: Download full-size image
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
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IF 19.7
Xinyu Wang,Xiaoyue Wang,Xiaowei Song,Wen Chen,Guojun Yuan,Xu Yu,Junwei Wang,Lili Ren
Atomic Ce-Fe dyad in Ni 3 S 2 enables kinetic-stability synergy for urea electrolysis. • Low cell voltage of 1.37 V at 100 mA·cm −2 with over 510 h durability. • Operando Raman, XAFS and DFT reveal optimized Ni-S bond and d -band center. Replacing the energy-intensive oxygen evolution reaction (OER) with the urea oxidation reaction (UOR) presents a promising route for energy-saving hydrogen production coupled with wastewater remediation. However, developing electrocatalysts that simultaneously achieve high activity and long-term stability remains a formidable challenge. Herein, we propose and validate a novel “kinetic-structural synergy” design principle by constructing atomic-scale Ce-Fe binary catalytic unit within Ni 3 S 2 nanoarrays. Unlike random doping, this defined architecture enables a functional division of labor. The Fe site acts as a kinetic promoter to dramatically lower the potential for active NiOOH phase formation, while the adjacent Ce site functions as a structural and electronic stabilizer, securing the high-valent Ni intermediates. The resulting catalyst achieves an ultra-low UOR potential. When configured in a two-electrode urea electrolyzer, it requires only 1.37 V to deliver 100 mA·cm −2 current density and maintains remarkable stability for over 510 h. In situ Raman spectroscopy directly evidences the earliest formation and exceptional persistence of the NiOOH phase on this catalyst. Combined X-ray absorption fine structure (XAFS) analysis and density functional theory (DFT) calculations elucidate from the atomic-level principle that the Fe-Ce unit cooperatively tunes the local coordination and electronic structure of Ni, leading to an optimal Ni-S bond length and a favorable d -band center of Ni site, collectively facilitating the reaction pathway. This work demonstrates that targeted lanthanide-transition metal pairing can create integrated catalytic units where activity and stability are inherently coupled, providing a new design strategy for advanced energy conversion systems. Download: Download high-res image (166KB) Download: Download full-size image The successful doping of Ce and Fe asymmetric metals to form the Fe-S-Ni-S-Ce catalytic chain alters the bond length/strength of the original Ni-S bond, promoting the formation of high-valent nickel species while enhancing their stability at high oxidation potentials, ultimately achieving a balance between high activity and long-term operation in the urea oxidation process.
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Journal of Materials Research and Technology-JMR&T
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2026
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IF 7.3
Jian-fa Jing,Shuai Wang,Yu-feng Guo,Feng Chen,Jinlai Zhang,Ling-zhi Yang,Guan-zhou Qiu
This study elucidates the influence of the CaO/MgO mass ratio and quaternary basicity (R 4 (CaO + MgO)/(SiO 2 /Al 2 O 3 )) on slag-phase evolution and element partitioning during electric-furnace smelting of pre-reduced vanadium titanomagnetite pellets. Thermodynamic calculations were employed to delineate a Ti-rich pseudobrookite-type slag domain that is amenable to subsequent acid-leaching processing for TiO 2 extraction. Smelting experiments under optimized conditions revealed that a balanced slag composition can simultaneously achieve high Ti enrichment in the slag and efficient Fe/V recovery in the metal phase, while suppressing the formation of CaTiO 3 . At 1600 °C with a holding time of 30 min and a carbon addition of 2 wt%, the combination of CaO/MgO = 0.5 and R 4 = 0.9 was identified as an optimal operating condition, yielding recovery rates of 99.82% for Fe, 93.12% for V, and 94.64% for TiO 2 . XRD and EPMA results show that the resulting slag is predominantly composed of anosovite, with subordinate diopside and magnesium titanium spinel, confirming the effective retention of Ti in the slag and the preferential partitioning of Fe and V into the metal phase. Collectively, these findings define a viable composition window for the design of acid-soluble titanium-bearing slags within the direct-reduction/electric-furnace processing route for vanadium titanomagnetite.
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