SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Zihao Wei,Qian Wu,Shiyu Fang,Xiang Zou,Ran Yu,Jiashun Cao,Lianghu Su,Weijing Liu,Song Cheng,Jingyang Luo
Digestate-derived biochar (BC) and an FeCl 3 /KOH-modified biochar (FKBC) were evaluated for ciprofloxacin (CIP) removal from nutrient-rich wastewater. FeCl 3 /KOH modification increased the specific surface area from 76.3 to 176.1 m 2 /g and introduced abundant oxygen-containing functional groups with dispersed Fe O coordination sites. Consequently, FKBC exhibited a Langmuir adsorption capacity of 117.93 mg/g, representing a 91.1% enhancement over pristine BC. Adsorption kinetics of FKBC were well described by the pseudo-second-order model (R 2 ≈ 0.99), with higher rate constants and initial adsorption rates, indicating accelerated chemisorption. FKBC further enabled simultaneous removal of ammonium and phosphate (∼60% at 20–120 mg/L). Adsorption was pH-dependent, favoring acidic conditions. XPS/FTIR analyses combined with density functional theory (DFT) calculations revealed that CIP adsorption is primarily governed by inner-sphere Fe O coordination and carboxylate complexation, with carbonyl anchoring and π-π interactions contributing at higher surface coverage. Stable Fe 2p features before and after adsorption indicate reversible surface coordination without alteration of iron chemical states, supporting low iron-leaching risk. A ranking efficiency product (REP) analysis yielded an overall sustainability score of 85%, highlighting FKBC as an efficient and sustainable adsorbent for antibiotic remediation and resource-oriented digestate valorization.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Peng Huo,Min Shi,Xiao Wang,Shuangyuan Li,Jiasheng Li,Jianxiang Wu,Qiaoxia Li,Qunjie Xu
To overcome the inherent activity, stability, and conductivity limitations of layered double hydroxides (LDHs) for the oxygen evolution reaction (OER), we developed an electrochemical-assisted strategy for time and potential controlled defect engineering in NiFeCo-LDH. Selective and controllable Fe extraction was achieved via a coordination reaction between Fe 3 + and SCN - under an applied potential, generating targeted oxygen and metal vacancies. The resulting catalyst exhibits an elevated Ni oxidation state and superior OER performance. The optimal sample (60 s Fe extraction) delivers a low overpotential of 254 mV at 100 mA/cm 2 and a Tafel slope of 48 mV/dec, while retaining over 90% activity after 400 h. In-situ Raman spectroscopy reveals that Fe extraction promotes the structural evolution from Ni(II)-O/OH to Ni(III)-OOH and activates the lattice oxygen mechanism (LOM), enhancing reaction kinetics. The catalyst also demonstrates promising performance under simulated industrial conditions and in seawater electrolytes, highlighting its potential for practical large-scale water electrolysis.
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Surfaces and Interfaces
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2026
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IF 6
Lihuan Feng,Yulin Wang,Hao He,Chunyu Li,Peng Chen,Qiang Liu,Xing’an Dong,Wenjie He,Jiazhen Liao,Wendong Zhang
Solar-driven photocatalytic CO 2 reduction provides a sustainable pathway for carbon-neutral fuel production, yet its efficiency is fundamentally limited by the chemical inertness of linear CO 2 and inefficient utilization of photogenerated charge carriers. Effective activation of CO 2 requires electron injection into its antibonding π* orbitals, a process that is poorly matched with conventional oxide photocatalysts. Herein, we construct chemically defined Ti-O-Fe interfacial bonds in TiO 2 /Fe 2 O 3 heterojunctions to establish a directional d→π* electron-transfer channel for CO 2 activation. The optimized TiO 2 /Fe 2 O 3 photocatalyst, synthesized via a one-step hydrothermal method, exhibits broadened visible-light absorption and delivers a CO formation rate of 17.56 μmol·g −1 ·h −1 , over three times higher than that of pristine TiO 2 . Spectroscopic analyses and density functional theory calculations reveal that interfacial electron transfer shifts Fe 3d states toward the Fermi level, enabling strong hybridization with the CO 2 π* orbitals and significantly lowering the free-energy barrier for *COOH formation. This bond-mediated electronic coupling not only suppresses charge recombination but also directs photogenerated electrons toward the CO 2 activation pathway. These results demonstrate that interfacial d-band engineering through chemically specific oxide–oxide bonds provide a powerful strategy to program elementary reaction steps in solar-driven CO 2 reduction beyond conventional band-alignment design.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
·
IF 9.2
Yinshuang Shao,Huipeng Zhao,Ji Wang,Xiaoshuang Zhang,Xiaoqiang Du
Electrocatalytic seawater splitting for generating H 2 has become one of the most promising methods. This study prepared M-NiSe/Ni 3 Se 2 (M = Co, Fe, Cd) electrocatalysts through a one-step hydrothermal selenification reaction. In alkaline seawater, the Co–NiSe/Ni 3 Se 2 electrode requires overpotentials of 273, 369, and 431 mV to drive current densities of 10, 50, and 100 mA cm −2 for oxygen evolution reaction (OER) process, respectively. Moreover, the Co–NiSe/Ni 3 Se 2 electrocatalyst needs only potential of 1.395 V to drive a current density of 10 mA cm −2 in the urea oxidation reaction (UOR) process. According to density functional theory result, the synergistic effect between the large H 2 O adsorption capacity of Co–NiSe and the superior electrical conductivity of Ni 3 Se 2 is a key factor for contributing to the superior performance of the Co–NiSe/Ni 3 Se 2 catalyst. This study conducted systematic doping comparison experiments on the NiSe/Ni 3 Se 2 system, providing authentic and reliable experimental support for the design of selenide electrocatalysts.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Sifan Sun,Jiawei Li,Qianzuo Liu,Binqi He,Haoran Yang,Xinyue Xiang,Ying Hao,Xuehua Yan,Ting Zhang,Tie Li
Hydrogen peroxide (H2O2) is an indispensable mediator in cellular signaling pathways, playing a multifaceted role in biological systems. The development of advanced catalysts derived from flexible sensors for the real-time monitoring of dynamic H2O2 in vivo remains an important research issue. Recently, dual single-atom catalyst-based nanozymes exhibit synergistically enhanced catalytic performance, displaying excellent potential for H2O2 detection. Nevertheless, rationally regulating the geometric structures and electron transfer between the two metals still pose significant challenges. Hence, in this study, an advanced Fe/Ce dual single-atom catalyst (Fe/Ce–C)-based nanozyme was constructed, which proposes a Ce single-atom doping strategy to alter the electronic structure of Fe single-atom sites, endowing it with a high adsorption energy for hydroxyl groups to reduce the energy barrier of H2O2 in the reaction. This Fe/Ce–C achieves a linear sensing behavior in the range of 0.5–10,000 μM with a response speed of 1.4 s, a detection limit of 0.223 μM, and a sensitivity of 213 μA/mM·cm2. Furthermore, the nanozyme-derived flexible electrochemical sensor was assembled for real-time monitoring of H2O2 concentration changes in the brains of living rats, exhibiting long-term detection capability and excellent in vivo biocompatibility. Such an Fe/Ce dual single-atom nanozyme-based electrochemical sensor can serve as a promising tool for monitoring diseases like Parkinson’s.
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PubMed
高影响因子
ACS Catalysis
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2026
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IF 13.6
Ziguang Zhou,Yang Zhang,Jungang Wang,Bo Hou,Riguang Zhang,Lixia Ling,Debao Li,Baojun Wang
The use of anatase–rutile mixed-phase TiO2 (P25) as a support improves both CO conversion and selectivity toward low-carbon alcohols (C1–C5 mixed alcohols) during syngas conversion over Cu–Fe bimetallic catalysts. A 61.4% selectivity to low-carbon alcohols was obtained at a CO conversion of 35.0%. The low-carbon alcohol yield (21.5%) over CuFe/P25 is 31 and 3 times higher than the yields over Cu–Fe catalysts supported on pure anatase TiO2 and pure rutile TiO2, respectively. The anatase–rutile synergy in P25 contributes to the high dispersion of Cu–Fe species and facilitates electron transfer from the P25 support to both Cu0 and FeCx active sites via metal–support interaction. CuFe/P25 enhances both the capabilities of CO adsorption, dissociation, and non-dissociative insertion and the formation of CHx, CHO, and HCOO intermediates. These findings suggest that tuning the crystalline phase of the support constitutes a rational strategy for enhancing the catalytic activity of the metal sites.
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CHEMISTRY OF MATERIALS
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2026
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IF 7.1
Chaohui Guo,Ang Qiao,Xuan Ge,Xiaoming Ren,Zijuan Du,Haizheng Tao,Yuanzheng Yue
Modulating the degree of structural disorder in metal–organic frameworks (MOFs) offers a promising strategy for tuning their physical and chemical properties. Structural disorder in MOFs can be created by various means, e.g., mechanical treatment or melting. Here, we show that structural disorder can be induced in an iron-based zeolitic imidazolate framework (denoted as Fe-ZIF) upon dynamic heating. The onset temperature of such structural disorder in Fe-ZIF is lower than its melting point. Small- and wide-angle X-ray scattering, together with high-energy synchrotron X-ray diffraction, revealed that structural disorder primarily evolves at the medium- and long-range scales, while the short-range order remains largely preserved. The distortion of medium-range structural domains, particularly the [Fe4Im8] clusters, led to the loss of long-range atomic periodicity in Fe-ZIF. Moreover, magnetic measurements demonstrate that the sample with a higher degree of medium-range structural disorder exhibited a lower spin freezing temperature. Thus, our work established a viable strategy for tailoring structural disorder in MOFs, enabling precise modulation of their magnetic functions.
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ANALYTICAL CHEMISTRY
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2026
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IF 7.3
Chunxia Ma,Limin Ma,Yaoyao Chen,Rui Han,Dongming Xu,Huanhuan Xing,Shasha Lu,Dewen Wang,Xiurong Yang
A major hurdle in nanozyme design is the difficulty of rationally tuning the coordination and electronic states of active sites, which are typically locked by the material’s rigid framework or surface composition. In this study, we address this limitation by developing a series of Fe-based quasi metal–organic framework nanozymes having a succulent appearance, denoted as Qx-MIL, through controlling the calcination of MIL. Partial decomposition of terephthalic acid ligands during heating increases the electron density of Fe active centers, reduces their coordination number, and generates asymmetric unsaturated Fe sites. These structural modifications enhance electron transfer, improve intermediate adsorption, promote the hydroxyl radical formation, and lower the energy barrier of the rate-determining step. As a result, Q400-MIL exhibits remarkable peroxidase-like activity and enhanced reaction kinetics. Leveraging this superior enzyme-mimicking performance, we constructed a galactose-oxidase-cascade colorimetric biosensor for the sensitive and selective detection of galactose. This work not only validates the high enzymatic activity and bioapplication potential of quasi MOF nanomaterials but also provides a simple and effective strategy for precisely engineering the active sites of nanozymes to broaden their functional scope.
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PubMed
高影响因子
Coatings
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2026
·Vol. 16
·期 6
·659
·
IF 3.4
Yi Zheng,Xin Luo,Sizhe Li,Zhengxian Shen,Hui Su
Faced with a global energy crisis and ecological degradation, overall water splitting (OWS) is a pivotal approach for renewable energy conversion and storage. However, its industrial application is hindered by the high energy barriers/sluggish kinetics of the anodic oxygen evolution reaction (OER), as well as the scarcity of precious metal catalysts limiting large-scale deployment. Herein, a cobalt-based layered double hydroxide (Co-LDH) was used as the precursor, and a multi-strategy synergistic modification (hydrothermal synthesis, Fe doping, sulfurization, and external magnetic field magnetization) was applied to fabricate the Fe-Co3S4-MS-20 min electrocatalyst. This strategy establishes Fe-Co bimetallic synergistic active centers, and magnetic treatment modulates the electron configuration of Fe 3dorbitals without changing the material’s lattice spacing or morphology. Structural characterizations and electrochemical measurements were used to investigate the effects of combined modifications on the catalyst’s phase structure, morphology, electronic structure, and trifunctional catalytic performance toward the hydrogen evolution reaction (HER), OER, and urea oxidation reaction (UOR). The Fe-Co3S4-MS-20 min catalyst exhibits a larger electrochemical active surface area, lower charge transfer resistance, and smaller Tafel slope in 1 M KOH, it achieves overpotentials of 165 mV for HER (10 mA·cm−2) and 310 mV for OER (100 mA·cm−2), along with superior UOR performance and long-term stability. In situ impedance and Raman spectroscopy confirm that magnetization accelerates charge transfer and promotes in situ reconstruction. Synergistic multi-strategy regulation optimizes the electronic structure of active centers, reducing electrocatalytic energy barriers. This work provides new insights into designing high-performance non-precious metal electrocatalysts and offers experimental support for external magnetic field regulation in electrocatalyst modification.
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FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
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2020
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IF 1.648
Yongming Zhang,Jing Zou,Yimeng Luo,Fanghui Wang
Ru-Fe bimetallic alloy nanoparticle catalyst (Ru-Fe/GO) was prepared by chemical reduction method on graphene oxide prepared using Hummers modified method. The structure and morphology of both GO and Ru-Fe/GO were analyzed using X-ray diffraction (XRD), Transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS, Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS).The effect of catalyst components on hydrogen generation rate for NaBH4 methanolysis was investigated. When Ru:Fe is 6:1, the catalytic activity is the highest, and the average rate is about 473 mL·min−1·g−1. The effect of temperature, Sodium hydroxide concentration, and sodium borohydride concentration on reaction rate is also discussed, and the activation energy for the methanolysis of sodium borohydride is 59.33 kJ·mol−1 based on the data.
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 13.2
Shidong Zheng,Yufei Shu,Chaoqun Zhu,Beizhao Chen,Youmei Xu,Weiwen Chen,Mengxia Wang,Siyu Cao,Zhipeng Liu,Fan Wang,Yunjiao Han,Zhongying Wang
Effective defluoridation remains a pressing challenge in water purification, particularly in complex water matrices. Cerium dioxide (CeO 2 ) is a promising fluoride adsorbent due to its tunable oxygen-deficient structure and high surface reactivity. However, the underlying mechanisms by which oxygen vacancies (V o ) and surface functionalities cooperatively influence fluoride adsorption remain unclear. Herein, a series of Fe-doped CeO 2 (Fe-CeO 2 ) materials were synthesized to systematically explore the role of Fe-induced V o in enhancing defluoridation performance. Among them, the 9 % Fe-CeO 2 sample exhibited the highest adsorption capacity (43.70 mg/g), achieving a 10.22 % increase over pristine CeO 2 and outperforming multiple benchmark adsorbents in both capacity and kinetics. Spectroscopic characterizations (XRD, XPS, FTIR, Raman) and density functional theory (DFT) calculations revealed a critical balance: moderate Vₒ concentrations not only provided direct adsorption sites but also facilitated hydroxyl group (–OH) formation, both essential for fluoride capture. However, excessive V o concentrations led to surface lattice reconstruction and suppressed –OH generation, resulting in a U-shaped relationship between V o content and adsorption performance. The material also demonstrated high stability under extreme pH conditions, strong selectivity in the presence of co-existing anions, excellent reusability over five adsorption-desorption cycles, and effective fluoride removal (< 1.0 mg/L) under environmentally relevant conditions. These findings offer mechanistic insight into defect engineering and highlight the potential of Fe-CeO 2 as a robust adsorbent for practical water defluoridation applications.
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Water Supply
·
2016
·Vol. 17
·期 3
·665-673
·
IF 0.532
Zang Xueke,Gu Xiaogang,Lu Shuguang,Miao Zhouwei,Zhang Xiang,Fu Xiaori,Fu George Y.,Qiu Zhaofu,Sui Qian
Trichloroethene (TCE) degradation by Fe(II)-activated sodium percarbonate (SPC) in the presence of citric acid (CA) in aqueous solution was investigated. The results indicated that the presence of CA enhanced TCE degradation significantly by promoting HO• generation. The presence of Cl − , HCO 3 − and the initial solution pH appeared to be not negligible on the effect of TCE oxidation, while humic acid had no influence on TCE degradation. The generation of HO• and O 2 − • in the SPC/Fe(II)/CA system was confirmed with chemical probes, and the radical scavenging tests showed that TCE degradation was due to direct oxidation by HO•. Acidic pH condition was favorable for TCE degradation. In summary, this study provided detailed information for the application of the CA-enhanced Fe(II)-activated SPC technique for TCE-contaminated groundwater remediation.
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