SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xiaolei Shi,Weibin Ma,Wei Chen,Xuan Tao,Chunxiao Gong,Shuai Gao,Lujiang Xu,Zhen Fang
Phenol is a typical toxic and persistent pollutant in wastewater, requiring efficient and recyclable adsorbents for its removal. In this study, Fe–N co-doped biochar was synthesized through four preparation routes combining KOH activation and FeCl 3 -NH 3 modification, and its phenol adsorption behavior and formation mechanism were systematically investigated. The biochar exhibited specific surface areas of 400–900 m 2 /g and N contents of 1.85–3.92 at.%, enabling the formation of Fe 2 O 3 , Fe 3 O 4 , and Fe-N x species. Among the samples, the biochar prepared at 800 °C via activation and soaking–drying achieved the highest phenol adsorption capacity (263.09 mg/g). Adsorption followed the Freundlich isotherm and pseudo-second-order kinetic model, indicating multilayer chemical adsorption. Cycling experiments revealed that Fe 2 O 3 and Fe 3 O 4 were easily detached, whereas Fe-N x remained stable, maintaining 76 % adsorption capacity after five cycles. DFT calculations further confirmed the strong anchoring of Fe ions by N-doped micropores and the thermodynamic stability of Fe-N x structures. This work demonstrates a simple and effective approach for preparing stable Fe-N biochar and provides mechanistic insight into its enhanced phenol adsorption.
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2025
·
IF 6.1
Luyang Zhao,Yang Song,Guoyang Xie,Hengyi Xu
A colorimetric assay based on the Fe/Al bimetallic organic framework NH 2 -MIL-53(Fe, Al) was developed for the sensitive detection of Escherichia coli O157:H7 ( E. coli O157:H7), a critical pathogen threatening food safety. The framework’s high specific surface area facilitated efficient antibody immobilization, whereas the incorporation of Al 3+ enhanced electron transfer between Fe 2+ /Fe 3+ , thereby significantly boosting peroxidase activity. The optimized NH 2 -MIL-53(Fe, Al) exhibited 1.4-fold and 4.9-fold higher relative absorbance than NH 2 -MIL-53(Fe) and NH 2 -MIL-53(Al), respectively. And it demonstrated 40-fold and 2-fold greater affinity for TMB and H 2 O 2 , respectively, compared to the natural enzyme. By integrating a dual-recognition system based on antibody and aptamer, the method enabled rapid detection with a limit of detection of 10 1 CFU/mL in colorimetric mode. Its successful application in complex matrices, including lettuce, juice, pool water, and chocolate milk, had yielded satisfactory recovery and precision, confirming its promising potential for food safety monitoring.
✓ 已验证
DOI
PubMed
高影响因子
Water
·
2025
·Vol. 17
·期 21
·3100
·
IF 3
Bingyang Wang,Xiaochen Wang,Shuang Liu,Zheng Wang,Fan Bai,Yujie Cheng,Dingkun Lu,Pengchao Xie
In this study, insoluble CaSO3was applied to replace soluble sulfite/bisulfite salt in the Fe(II)-activated sulfite/bisulfite [S(IV)] process for the efficient 2,4,6-tribromophenol (TBP) degradation. CaSO3serves as a low-cost and slow-release source of S(IV), significantly improving S(IV) utilization compared to conventional soluble Na2SO3. The Fe(II)/CaSO3system generated SO4•−and HO•through Fe(II)/Fe(III) redox cycling. Mechanistic studies confirmed SO4•−as the dominant reactive species, selectively attacking C-Br bonds and hydroxyl groups in TBP. Process optimization revealed effective performance under acidic conditions (pH 3.5–4.0) with minimal inhibition by common anions (Cl−, HCO3−). The reactive sites of TBP were identified through Fukui function calculations, and the degradation pathway was elucidated based on LC-MS analysis. Toxicity evaluation indicated reduced ecological risk of degradation intermediates due to debromination and benzene ring cleavage. This work provides a sustainable strategy for efficient TBP removal and detoxification in wastewater treatment with benefiting S(IV) utilization.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materiomics
·
2025
·
IF 9.6
Fengting Mao,Zhongwei Zhang,Sijing Zhu,Chengyan Liu,Jie Gao,Jun-Liang Chen,Xiaoyang Wang,Tong Xing,Lei Miao
GeTe is a promising medium-temperature thermoelectric material. However, an excessively high concentration of Ge holes leads to a high hole carrier concentration, which can degrade its performance. Though carrier concentration reduction via doping has been pursued as a principal optimization approach, the strong interdependence between key transport parameters and carrier concentration severely limited the overall enhancement efficacy. In this work, a simple composite method is employed to achieve synergistic optimization of carrier concentration and carrier mobility, thereby increasing the power factor and reducing the lattice thermal conductivity. Sb and Fe form a core-shell structure, which effectively scatters phonons and reduces the lattice thermal conductivity, achieving a minimum value of 0.59 W⸱m –1 ⸱K –1 at 723 K. Additionally, Fe doping enhances the effective mass, improves the Seebeck coefficient, and significantly boosts the power factor, which reaches a peak value of 43.0 μW⸱cm –1 ⸱K –2 at 623 K. The results demonstrate that the sample Ge 0.885 Sb 0.1 Fe 0.015 Te achieves a maximum zT of approximately 2.13 at 723 K and an average zT ( zT avg ) of 1.43 within the temperature range of 323 K to 773 K. This work provides an effective path to enhance the performance of GeTe-based thermoelectric materials.
✓ 已验证
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2025
·Vol. 92
·期 10
·1441-1456
·
IF 2.6
Wang Wenhao,Ge Aijun,Xu Yuan,Yang Xuesong,Feng Shiying,Su Ying,Wang Weida,Xing Liqun,Hao Xiujuan
View large Download slide View large Download slide Close modal In the study, a novel Fe/Al bimetal with a high specific surface area and electron transfer capacity was synthesized through ball milling Fe and Al powder. Importantly, this synthesis process did not consume Al powder and did not generate by-products that required treatment. Compared with Fe or Al powder and the ball-milled Fe or Al powder, Fe/Al could rapidly remove Cr(VI) through adsorption–reduction under near-neutral conditions. Nevertheless, the removal efficiency of Cr(VI) by Fe/Al was influenced by the initial pH of the solution and dissolved oxygen (DO). Kinetic studies and adsorption isotherm analysis demonstrated that the pseudo-second-order adsorption kinetic model and the Freundlich model could better describe the Cr(VI) removal data, and the maximum removal amount of Cr(VI) was 6.25 mg/g. Furthermore, based on the characterization analysis of XPS, the adsorbed Cr(VI) was reduced to Cr(III). SEM-EDS analysis revealed that Cr mainly overlapped with the Fe elemental distribution on the surface of Fe/Al particles, suggesting that Fe was the main reaction site. Consequently, the results indicated that highly active Fe/Al could be prepared by solid–solid blending for pollutant removal, which provided technological concepts for the waste utilization of scrap iron and aluminum. Increasing the specific surface area of Fe/Al by ball milling of Fe and Al powder was the key to enhancing Cr(VI) removal. Cr(VI) was mainly removed by adsorption–reduction under near-neutral pH. The removal sites of Cr(VI) by Fe/Al mainly occur on the surface of Fe. The maximum adsorption capacities of Cr(VI) by Fe/Al were 6.25 mg/g.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Lupeng Shao,Kairuo Zhu,Zhen Xiao,Jianbiao Peng,Shangru Zhai
Innovative engineering biochar from waste biomass is of huge interest for organic wastewater cleanup. This study introduced lignosulfonate (LS) derived Fe-doped biochar (Fe/LSB), which is prepared by the solvent-free method that integrating the ball-milling treatment with one-pot pyrolysis process, as the Fenton-like catalyst for tetracycline (TC) degradation. Various characterization revealed its porous structure, large surface area, and rich active sites. Degradation test confirmed that Fe/LSB achieves preferable efficiency for TC removal by peroxymonosulfate (PMS) activation. Mechanistic analysis identified a synergistic process involving 1 O 2 (mainly), SO 4 •– and •OH, which drove the effective TC degradation. Meanwhile, new degradation pathway in Fe/LSB/PMS system was proposed and the toxicity assessments revealed an obvious decline in toxicity of intermediate products. Furthermore, Fe/LSB/PMS system also achieved the excellent removal efficiency of TC during a continuous 6-day reaction process. This work transforms LS into Fe-based biochar catalyst, boosting sustainable development and providing a reliable way for TC removal, strengthening low-impact Fenton-like technology.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 10
·104502
·
IF 3.721
Guofeng Liang,Jilin Huang,Jiawang Li,Yinlong Wu,Guoju Huang,Yan Qi Jin,Hongbin Zeng,Hao Zhang,Jian Chen,Yanshuo Jin,Nan Wang,Fangyan Xie,Hui Meng
Transition metal and nitrogen co-doped carbon-based nanomaterial has been used as non-precious metal catalyst for oxygen reduction reaction (ORR). In this work, bamboo-like carbon nanotubes structured FeCo/N/C electrocatalyst is proved to show much enhanced performance compared with Co/N/C. MIL-53 (Fe) is used as iron source, MIL-53 (Co) is used as cobalt source and ZIF-8 as carbon source. The ball-milling procedure plays a significant role for the distribution of Fe and Co component and the formation of carbon nanotubes, which is believed to enhance the catalytic performance due to abundant electrocatalytic active sites and efficient mass transfer. The as prepared sample obtained by optimized preparation conditions exhibits outstanding ORR activity in acid solution with an onset potential of 0.96 V vs RHE (reversible hydrogen electrode), half-wave potential of 0.78 V, and a current density of 0.575 m A cm−2 at 0.7 V in a H2-O2 fuel cell test, which provides an ideal viewpoint to develop highly efficient catalyst for the oxygen reduction reaction. The high ORR performance could be attributed to the synergistic effect between Fe and Co and the high conductivity and mass transfer of the carbon nanotube.
✓ 已验证
DOI
高影响因子
HIGH PERFORMANCE POLYMERS
·
2024
·
IF 1.8
Weihua Zhong,Jinwang Bai,Yunjun Luo,Dianbo Zhang,Chen Liang,Xiangdong Chen
Poly(p-phenylene-2,6-benzobisoxazole) (PBO) fiber is currently one of the best-performing organic fibers; however, its low UV aging resistance limits its use. To improve the UV aging performance of PBO fibers, a novel PBO-Fe-PDA fiber was created by depositing a biomimetic structure of polydopamine (PDA) on the surface of PBO fibers with the transition metal ion Fe3+ as the active center. The surface morphology and elemental composition of PBO-Fe-PDA fibers were investigated. It was revealed that Fe3+ formed a coordination bond structure with the oxazole ring, and PDA was successfully loaded onto the surface of PBO-Fe fibers. After UV aging, the crystallinity and crystallographic orientation of PBO fibers significantly decrease, microcrystals inside the fibers slip, and the size of microvoids in the fibers rises. As a result, the strength of PBO fibers was significantly decreased after UV aging. The anti-UV aging capacity of PBO-Fe-PDA fibers, on the other hand, has been enhanced, as evidenced by a slight drop in crystallinity and crystallographic orientation and a significant decrease in the size growth of internal microvoids in the fibers after UV aging. The tensile strength retention of PBO-Fe-PDA fibers after UV aging increased by 93.13% when compared to PBO fibers without altering the fibers’ initial strength. The testing results show that this surface modification method is simple to employ and extends the service life of PBO fibers significantly.
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Tong Li,Pei Hu,Jiawei Li,Pintong Huang,Weijun Tong,Changyou Gao
Inspired by natural hemin structure, the fabrication of metal organic framework (MOF) nanomaterials constructed by metal ions and iron porphyrin for peroxidase mimicking has attracted extensive attention recently due to their high concentration of active sites and great channeling for substrate diffusion. Herein, by using benzoic acid as capping agent, we fabricated uniform PCN-224 nanoparticles (NPs), which were composed of Zr 6 cluster and tetrakis(4-carboxyphenyl)porphyrin (H 2 TCPP). Then Fe(Ⅲ) ions were incorporated into the center of H 2 TCPP producing iron porphyrin unit similar to hemin serving as catalytic active site. The procedure of iron incorporation didn't change the size and morphology of PCN-224 NPs. The newly formed Fe@PCN-224 NPs possessed peroxidase-like activity with much lower K m values and higher K cat values than most of peroxidase-like nanozymes as well as natural horseradish peroxidase (HRP), indicating their enhanced catalytic activity. Taking advantage of the excellent peroxidase-like activity of Fe@PCN-224 NPs, we successfully developed a colorimetric method for simple and sensitive detection of hydrogen peroxide and glucose in combination with glucose oxidase .
✓ 已验证
DOI
高影响因子
GLASS PHYSICS AND CHEMISTRY
·
2023
·Vol. 49
·期 5
·463-477
·
IF 0.7
Wence Xu,Cao Zhao,Ma Rui,Zhang Yuxuan,Wu Nannan,Ouyang Shunli
Abstract Utilizing mining and metallurgical waste as a resource is one of the effective methods to tackle the issue of solid waste accumulation. In this study, the CaO–MgO–Al 2 O 3 –SiO 2 system glass–ceramics were prepared based on the traditional melt-casting technique using iron ore slag as the main raw material. Investigations were done on how different iron ion concentrations affected glass–ceramics properties. And the migration pattern of iron ions was explored deeply using Raman spectroscopy and FTIR. XRD revealed the crystallization ability of augite and magnetite increasing as the iron ions grew. The combination of vibrating sample magnetometer, electron backscatter diffraction, and MFM techniques indicates that the distribution of magnetite, grain size, and structure are connected to the magnetic performances of glass–ceramics. Glass–ceramics has outstanding magnetic properties and flexural strength. Therefore, it has vast potential for future development in electronic devices, wear-resistant applications, and electromagnetic shielding.
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Cong Li,Yefei Li,Juan Wang,Bo Li,Dawei Yi,Jing Shi,Qiaoling Zheng,Yimin Gao,Siyong Zhao
The preparation, microstructure and mechanical properties of ZTA particles reinforced Fe matrix composites (ZTA P /Fe composites) were systematically investigated. The X-ray diffraction (XRD), scanning electron microscopy (SEM) and electron probe microanalysis (EPMA) were used to analyze the microstructure and phase constituents, the hardness ( H) , Young's modulus ( E ) and plasticity factor ( δ A ) were determined as well. The nickel-chromium double-layer coated ZTA P of core-shell structure was prepared by electroless plating and multi-arc ion plating technologies. The modified ZTA P is consisted of the α -Al 2 O 3 , t -ZrO 2 , α -Cr and γ -Ni phases. In addition, the compressive strength of ceramic preforms is high due to a compact sintering neck formed among ZTA P during high temperature sintering . The preferred sintering process for ZTA ceramic preforms is determined as 1350 °C + 1 h, in this case the preforms show the remarkable porosity and highest compressive strength which are 27.8% and 35.0 MPa, respectively. The interfacial metallurgical chemical reactions occurred during infiltration casting process, which ensure the excellent metallurgical interfacial bonding of the ZTA P /Fe composites. The interface contains double transition layers, which refer to silicate and CrFe phases, respectively. The H , E and δ A of interfacial double transition layers were measured by the nano-indentation method, the values of which are situated between the ZTA P and iron matrix.
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Meng Xia,Zheng Shen,Minyan Gu,Wenbo Chen,Wenjie Dong,Yalei Zhang
Microalgae residue was efficiently converted into lactic acid with a high yield (33.9%) under mild reaction conditions (210 °C, 2 h) over a Fe-Sn-Beta catalyst. Under the action of homogeneous H 3 O + and distinct Lewis acid sites on the catalyst, the production of lactic acid from microalgae residue underwent three main reaction steps: hydrolysis, isomerization , and retro-aldol condensation. Results demonstrated that the lipid component had a strong inhibitory effect on the production of lactic acid due to the formation of aromatics, esters, and complex nitrogenous heterocyclic compounds , which covered or poisoned the Lewis acid sites of the catalyst. The protein component acted as a chemical buffer that enhanced the production of lactic acid by controlling the release of monosaccharides from the carbohydrate fraction of microalgae and maintaining the catalytic activity of the catalyst. Thus, microalgae residue demonstrated great promise for the production of value-added chemicals.
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）