RSC Advances
·
2024
·Vol. 14
·期 24
·16747-16757
·
IF 3.9
Siyi Mi,Lungang Chen,Xinghua Zhang,Qi Zhang,Longlong Ma,Jianguo Liu
One of the main obstacles to the development of sustainable biomass feedstocks today is the research of selective hydrogenation of biomass platform compounds for the synthesis of high-value chemicals. This work reports on the synthesis of a Ni/Fe bimetallic catalyst with nitrogen-doped carbon serving as the carrier, hydrogen serving as the primary donor, and isopropanol serving as the reaction medium and serving as a secondary donor. Vanillin was catalytically hydrogenated to produce 4-methylguaiacol, a complete hydrogenation product, under a reaction temperature of 200 °C for four hours. A single product with a good yield (95.26% conversion and selectivity up to 99%) was achieved by the moderate conditions, offering a potential route for the catalytic hydrogenation of biomass platform compounds.
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高影响因子
CHEMICAL PHYSICS
·
2024
·
IF 2
Qian Liu,Panpan Xu,Qianqian Zhang,Guangming Han,Ling Li,Limin Zhou
A series of novel MIL-53(Fe)/CoWO 4 composites were synthesized by combining MIL-53(Fe) and CoWO 4 nanoparticles via solvothermal method. The structural characterizations showed that CoWO 4 nanoparticles were uniformly distributed on the surface of hexagonal bipyramid MIL-53(Fe). Combining XPS and Mott-Schottky plots, a Z-scheme heterojunction was formed between MIL-53(Fe) and CoWO 4 , resulting in a significant improvement in the electron-hole pair separation efficiency. UV–vis diffused reflectance spectra indicated that the optical arrange of MIL-53(Fe)/CoWO 4 composites were expanded to visible light. The photocatalytic degradation experiments under visible light irradiation showed that MIL/CWO-60 synergistically with PMS degraded 90.5 % of TC-HCl within 50 min. The XRD spectra of used and unused composites were identical, indicating good stability in four consecutive cycles. Electron paramagnetic resonance (EPR) and free radicals trapping experiment revealed that active species included O 2− , SO 4 − , h + , OH and 1 O 2 , and mechanism of the synergistic degradation of TC-HCl by MIL-53(Fe)/CoWO 4 composites and PMS was proposed.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Zheyu Huang,Jingzhong Kuang,Tingsheng Qiu,Mingming Yu
Metal-phenolic networks (MPNs) offer a promising, environmentally compatible strategy for cleaner, more efficient tungsten resource utilization due to their tunable structures and efficient interfacial regulation. This paper investigates the structural regulation effect of a self-assembled Fe(Ⅲ)-tannic acid (TA) MPN, formed through the coordination of TA and Fe 3 + , on the flotation separation of scheelite and calcite. The adsorption mechanisms were elucidated through contact angle, adsorption capacity, zeta potential and XPS analyses, while TEM, UV–vis spectroscopy and DFT calculations were employed to probe the micro- and coordination structures. The results demonstrated that the Fe(Ⅲ)-TA MPN formed at pH= 4 with TA:Fe= 1:1/2 exhibited minimal inhibition of scheelite but strong suppression of calcite, yielding a tungsten concentrate with a WO 3 grade of 71.35 % and recovery of 86.94 %. This behavior was attributed to the formation of a mono-coordination network (Fe:TA=1:1), which adsorbed onto both mineral surfaces through Fe-mediated interactions. In contrast, the tris-coordination network (Fe:TA=1:3) displayed the highest intrinsic reactivity but was limited by Fe(OH) 3 colloid deposition, hindering collector adsorption. The bis-coordination network (Fe:TA=1:2) remained stable over pH= 3–8 and selectively adsorbed on calcite via synergistic electrostatic attraction, hydrogen bonding, and chemical bonding, forming stable hydrophilic films. However, strong electrostatic repulsion hindered Fe(Ⅲ)–TA MPN adsorption on scheelite, thus maintaining its floatability. This study elucidates the structure-function relationship of Fe(III)-TA MPNs, offering new perspectives for designing environmentally friendly inhibitors for selective tungsten flotation.
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Environmental Technology & Innovation
·
2025
·
IF 7.1
Shuzhen Yang,Bingjing Tian,Yanfang Huang,Bingbing Liu,Shengpeng Su,Wenjuan Wang,Guihong Han
The persistent dye rhodamine B (RhB) in textile wastewater poses severe ecological threats, demanding efficient and sustainable treatment technologies. This study synthesized a novel trimetallic Cu-Fe-Co catalyst via a nitrogen-atmosphere co-reduction method. The catalyst’s unique advantage lies in the synergistic effects of Cu, Fe, and Co, which significantly enhance catalytic performance. The redox-active phases of Cu, combined with the Fenton-like reactivity of Fe, are further optimized by Co doping to improve reactive oxygen species (ROS) generation and electron transfer efficiency. Characterization revealed a dendritic structure dominated by Cu, Cu₂O, and FeO phases, with Co-induced lattice expansion (Δ d / d = +0.25 %) enhancing surface reactivity. Under optimized conditions (pH 3, 1.5 g/L catalyst, 20 mg/L RhB), the ternary Cu-Fe-Co catalyst achieved 99.8 % RhB degradation within 40 min, with high mineralization efficiency (46.5 % TOC removal, 82.1 % COD removal). Mechanistic studies demonstrated that Co incorporation promotes the conversion of superoxide radicals (·O₂⁻) into long-lived singlet oxygen (¹O₂), synergistically enhancing oxidative effects from ·OH and ¹O₂, while in situ H₂O₂ generation drives radical chain reactions. Compared to binary catalysts, the ternary system exhibits superior degradation kinetics for RhB and maintains 95.8 % degradation efficiency even after five cycles. This study provides new insights into trimetallic catalyst design, highlighting its practical potential for wastewater treatment.
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Progress in Natural Science-Materials International
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2025
·
IF 7.1
Xu Wang,Qiang Zhang,Shuangjie Chu,Tong Qin,Qian Liu,Zhengzheng Li,Jun Wang,Jiayu Wan,Bo Mao
Zinc-bromine flow batteries (ZBFBs) are promising for sustainable energy storage due to their high energy density and cost-effectiveness. However, the sluggish kinetics of the Br 2 /Br − redox reaction at the cathode limits their performance. Here, we developed Fe/N co-doped micro-mesoporous carbon nanofibers (Fe-N-CNFs) as a high-performance cathode catalyst. Synthesized via electrospinning Fe/Zn-ZIFs with PAN/PVP, followed by carbonization, the Fe-N-CNFs exhibited a hierarchical pore structure with a specific surface area of 1057 m 2 g −1 and an average pore size of 2.5 nm. The optimized catalyst, doped with 4 wt% Fe, achieved an energy efficiency of 81 % at 80 mA cm −2 and maintained a Coulombic efficiency of 98.4 % over 200 cycles. This work demonstrates the potential of integrating electrospinning with MOF-derived catalysts to enhance ZBFB performance, offering a scalable solution for high-efficiency energy storage systems.
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JOURNAL OF CATALYSIS
·
2025
·
IF 6.5
Qi Chen,Xingxing Huang,Cheng Liu,Yueling Chen,Jionghua Wu,Jimmy C. Yu,Ling Wu
The attainment of rapid charge mobility and effective N 2 activation is of critical importance for photocatalytic nitrogen fixation but it has always been a challenge. Such challenge may be met by the construction of a Type II MoS 2 nanoparticles/ MIL-100(Fe) heterojunction photocatalyst. The new material possesses charge migration channels that facilitate the separation of photogenerated carriers. This charge redistribution during photocatalysis is confirmed by experimental results showing a decrease of charge density on the Fe species and an increase of that on Mo. Moreover, DFT calculations show that the adsorption of N 2 and H 2 O is more likely to occur on Fe sites and Mo sites, respectively. These findings clearly suggest a drastically improved spatial isolation of reduction and oxidation sites on the photocatalyst as compared to pristine MIL-100(Fe). The optimized MoS 2 /MIL-100(Fe) exhibits a NH 4 + yield rate of 1.29 μmol·h −1 as excellent utilization of photoinduced electron-hole pairs and effective adsorption and activation of N 2 become possible. This work offers an insight on the synergy of heterojunction engineering with coordinated activation for photocatalytic ammonia synthesis.
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Sustainable Materials and Technologies
·
2025
·
IF 9.2
Dawei Gao,Qiaoli Lu,Jiajun Tang,Lili Wang
Norfloxacin (NOR), a common antibiotic, generates substantial wastewater during the production process. This wastewater infiltrates lakes, rivers, and groundwater systems, giving rise to water pollution. It also poses risks of human accidental ingestion. Once entering the human body, NOR may cause damage to organisms and enhance drug resistance, thereby posing a severe threat to human health. NOR has been recognized as an emerging micro-pollutant, and traditional wastewater treatment technologies struggle to efficiently remove it. Therefore, there is an urgent need to develop an effective and environmentally friendly technology for the removal of norfloxacin from water. In this study, a reusable fabric-based highly efficient catalyst, DHCA@MoS 2 @CMCF-Fe, was developed. The research results indicate that under mild stirring conditions, the surface of DHCA@MoS 2 @CMCF-Fe can generate abundant free charges, enabling the efficient activation of peroxomonosulfate (PMS). Moreover, the exposed Mo(IV) active sites in DHCA@MoS 2 @CMCF-Fe effectively accelerate the electron transfer and redox cycle of Fe(II)/Fe(III), ensuring the continuous and efficient activation of PMS. Furthermore, the synergistic effect between MoS 2 and Fe further optimizes the electron conduction pathway, enhancing the efficiency of charge separation and transfer within the system, and enabling the continuous generation of a large number of highly reactive radicals. The degradation rate of NOR by the DHCA@MoS 2 @CMCF-Fe system can reach 95.7 %, which is 102 % higher than that of the DHCA@MoS 2 @CMCF system. In experiments exploring the effects of various inorganic anions on the degradation of NOR, it was found that Cl − and SO 4 2− had relatively minor impacts on NOR degradation. In contrast, HCO 3 − exerted a certain inhibitory effect, causing the degradation rate to decline from 95.7 % to 80 %. To elucidate the degradation mechanism of NOR, quenching experiments and electron paramagnetic resonance (EPR) spectroscopy were conducted. The results confirmed that 1 O 2 and SO 4 − · were the key reactive species dominating the degradation of NOR. Subsequently, a detailed analysis was performed to uncover the catalytic mechanism by which the DHCA@MoS 2 @CMCF-Fe system degrades NOR. Furthermore, after five cycles of reuse, the catalyst maintained high catalytic activity, with the degradation rate of NOR remaining above 85 %. Aiming at the drawbacks of traditional powder catalysts, such as difficult recovery and potential for secondary pollution, this study supported the catalyst on fabric, effectively addressing these issues to the greatest extent. This research not only opens up a new pathway for the application of PMS in the treatment of antibiotic-contaminated water but also fully demonstrates the immense application potential of DHCA@MoS 2 @CMCF-Fe in the removal of organic pollutants, providing novel ideas and directions for the development of environmental remediation technologies.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Jiahui Ma,Bin Jiang,Longfei Zhang,Feihong Chu,Na Yang,Yongli Sun,Luhong Zhang
Traditional textile wastewater treatment methods face significant challenges in achieving effective dye/salt separation with low energy consumption. In this study, a high-performance loose nanofiltration (LNF) membrane based on metal-polyphenol bio-adhesion was fabricated. By exchanging Fe 3+ onto Laponite (Lp) nanosheets, the coordination between tannic acid (TA) and Fe 3+ was controlled, optimizing the structure of the selective layer. Subsequently, PVP was introduced to regulate membrane structure owing to the hydrogen bonding between TA and PVP, thereby enhancing both separation performance and stability of the membrane. The optimized Fe@Lp/TA-PVP membrane exhibited favorable separation performance by modulating preparation conditions including the Fe 3+ exchanging on Lp nanosheets, PVP concentration, and coating time. The LNF membrane possessed high water permeability (167.7 L·m −2 ·h −1 ·bar −1 ) and favorable separating efficiency for dyes from salts. A high rejection of 99.9 % was achieved for Congo Red and Methyl Blue, while the rejection of Na 2 SO 4 and MgCl 2 remained low, at 8.93 % and 2.21 %, respectively. Besides, the membrane demonstrated desirable antifouling capability. Therefore, this work enriches the applications of metal-polyphenol coordination in water treatment, provides new insights into the design of LNF membranes.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Fei Chai,Samuel Kolog Badazabra,Feiping Zhao,Xu Yan,Qingwei Wang,Xiaobo Min,Liyuan Chai
Arsenic is a widely acknowledged environmental pollutant commonly found in both natural and industrial water systems, posing critical risks to both ecosystems and human health. This study introduces an iron-modified MnMg layered double hydroxide (FeMnMg-LDH) engineered to enhance arsenic removal efficiency for both As(III) and As(V) under environmentally relevant conditions. The materials were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FTIR). The incorporation of Fe into MnMg-LDH led to increased surface area, optimized surface chemistry, and mitigated particle aggregation, thereby exposing additional active sites. The FeMnMg-LDH demonstrated remarkable adsorption capacities of 106.67 mg g −1 for As(III) and 107.63 mg g −1 for As(V), representing a sixfold and twofold enhancement, respectively, over the pristine MnMg-LDH. Adsorption kinetics and isotherms aligned closely with pseudo-second-order and Langmuir models, indicating monolayer chemisorption. Competitive anion experiments revealed minimal interference except for PO 4 3- , underscoring the material’s selectivity. The FeMnMg-LDH retained > 80 % of its initial capacity after three regeneration cycles, demonstrating robust reusability. The mechanisms investigation reveals a synergistic oxidation-adsorption process, where Fe/Mn redox couples facilitated As(III) oxidation to more adsorbable As(V), coupled with immobilization via coprecipitation, surface complexation, electrostatic interactions, and ion exchange. These findings reveal that FeMnMg-LDH is a promising sorbent for arsenic-contained wastewater treatment, offering practical advantages in stability, efficiency, and scalability.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yirou Bai,Yu Chen,Ping Xue,Lei Wang,Zenghui Diao,Gang Song,Diyun Chen,Lingjun Kong
Nano zero-valent iron (nZVI) has been widely reported to attract uranium (U(VI)) from wastewater through surface adsorption and reduction. However, surface oxidation and agglomeration of nZVI significantly limited the application of nZVI in removing U(VI) from wastewater. In this study, a novel porous nZVI/BC composite (Fe 1 Zn 3 -BC(900)) was synthesized via a one-step process coupling carbothermal reduction and ZnCl 2 activation. In this process, ferric chloride and zinc chloride were employed as the Fe and Zn precursors, while starch was utilized as the biochar precursor. Zn and Fe were formed in the carbothermal reduction process. The Zn was sacrificed through evaporation to increase the porosity, providing sufficient inner space for well-dispersing the nZVI, what could be wrapped and protected by the porous carbon. Besides, the galvanic cell between the nZVI-C interface was formed, accelerating the electron transfer for reduction of U(VI) into U(IV). As expected, the Fe 1 Zn 3 -BC(900) performed a high efficiency of 94.3% for separating the U(VI) in an initial concentration of 10 mg/L within 30 min, confirming the positive effect of ZnCl 2 sacrifice on enhancing separation of U(VI) onto the Fe 1 Zn 3 -BC(900). The high uranium removal efficiency can be attributed to the fact that the enhanced porosity resulting from Zn evaporation facilitates U(VI) adsorption. The reduction of U(VI) is further facilitated by the high dispersion of nZVI and the formation of Fe/C galvanic cell. Therefore, this work has developed a promising method to address the agglomeration of nZVI in the separation of U(VI) from wastewater, which provides a new idea for the subsequent efficient uranium removal.
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CATALYSIS LETTERS
·
2025
·Vol. 155
·期 9
·1-12
·
IF 2.4
Zhong Yuhang,Xu Hui,Li Zhiguo,Zhang Yuqi,Hou Jianyuan,Yuan Yuan,Liu Xingang,Zhang Renxi
This study demonstrates an innovative approach for green and efficient hydrogen production from seawater, utilizing Cu–Fe/Al 2 O 3 catalysts coupled with a dielectric barrier discharge (DBD) system. The catalytic performance was systematically evaluated under varying voltages and Cu/Fe ratios in a DBD reactor to optimize hydrogen production efficiency. Subsequent investigations focused on humidity and gas flow rate effects using the optimal catalyst (Cu/Fe/Al 2 O 3 = 2:1:9). Multimodal characterization (XRD, XPS, FTIR, OES) combined with DFT calculations revealed the mechanistic role of Cu–Fe/Al 2 O 3 in plasma-driven hydrogen generation. The synergistic interaction between Fe and Cu enhanced hydroxyl/hydrogen radical generation through improved adsorption, thereby boosting hydrogen evolution efficiency and yield. The optimized system achieved a maximum hydrogen yield of 7.4 g/kWh at 3 kV operating voltage, 3 L/min argon flow, and 100% relative humidity, establishing an energy-efficient pathway for sustainable hydrogen production from seawater. Graphical
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CHEMICAL PHYSICS LETTERS
·
2025
·
IF 3.1
Kangyue Qiao,Songyao Du,Yue Wang,Tongxin Xiao,Guodong Hao,Chao Sui,Yihan Yan
To address the severe Cr(VI) contamination in industrial wastewater, an NH 2 -MIL-101(Fe)/g-C 3 N 4 type-II heterojunction photocatalyst was synthesized via a solvothermal one-pot method. Structural characterization using XRD, SEM, XPS, and BET confirmed successful composite formation with high specific surface area and favorable interfacial contact. Photocatalytic experiments revealed that under conditions of pH = 2, a catalyst dosage of 20 mg, and an initial concentration of 10 mg/L, NM-101(Fe)/0.2CN achieved a 99.5 % reduction efficiency within 80 min. Its reaction rate constant was 3.6 times higher than that of NM-101(Fe) used alone. This study provides new insights for developing highly efficient MOF/polymer composite photocatalysts.
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