Journal of the Taiwan Institute of Chemical Engineers
·
2019
·
IF 3.834
Kané Rabé,Lifen Liu,Noor Ahmed Nahyoon,Yizhen Zhang,Ahmed Mahmoud Idris,Jiaqi Sun,Lixin Yuan
We have prepared and studied a novel low cost catalyst of g-C 3 N 4 /Fe 0 (1%)/TiO 2, using a simple process involving the formation of zero valence iron by chemical reduction . This ternary catalyst g-C 3 N 4 /Fe 0 (1%)/TiO 2 was characterized using XRD (X-Ray diffraction), UV–vis spectrum, EDS (Energy Dispersive spectrum) and TEM (transmission electron microscopy), it demonstrated high-visible-light activity in a wide range of pH condition, it can photo-catalytically degraded Rhodamine B (RhB), Tetracycline (TC), and Berberine hydrogen chloride (BH) (∼98% in 90 min) under visible light. The high activity arises from the increased harvest of more visible light and the improved separation of photo-excited electrons and holes via Z-scheme and heterojunctions mechanism. Also, the time required to remove 100% RhB, TC, and 96% BH can be shortened from 90 min to 60 min by introducing 3.18 mM Na 2 SO 3 to this photocatalysis system that assisted the generation of reactive oxidizing species and pollutant degradation. The results showed promising application prospect for this developed catalyst and the tested photocatalysis pollutant degradation system.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
·
IF 7.8
Zhuowen Yang,Ke Feng
The Fe 0 /H 2 O 2 system, which is capable of removing organic matter from wastewater, suffers from limited efficiency because of slow Fe 2+ release and restricted Fe 2+ /Fe 3+ cycling. This study investigated the performance and mechanism of a UV-enhanced Fe 0 /H 2 O 2 system for the removal of organics in semiaerobic aged refuse biofilter (SAARB) effluent from landfill leachate, with HO • identified as the primary reactive oxygen species. UV not only initiates a homogeneous Fenton reaction through direct photolysis of H 2 O 2 and promotes Fe 2+ release from Fe 0 but also accelerates surface corrosion of Fe 0 to form more iron oxides, which react with H 2 O 2 in a heterogeneous Fenton reaction, thereby generating HO • at a faster rate. HO • preferentially reacts with organics containing chromophores or auxochromes, attacks humus with abundant conjugated structures, converts them into smaller organic molecules, and even achieves mineralization. Increasing the Fenton reagent ratio and dosage enhances the removal performance of the UV/Fe 0 /H 2 O 2 system, with optimal organic removal observed under acidic conditions. Ultimately, optimal conditions of the UV power (10 W), Fe 0 (2 mM) and H 2 O 2 (12 mM) dosages at pH 3.0 achieved 84.48% CN, 90.06% UV 254 , and 62.84% TOC removal. This study provides a feasible solution for achieving discharge standards for landfill leachate.
研究领域:
环境科学
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废水处理
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
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IF 16.744
Yumeng Wang,Peng Zhang,Lai Lyu,Weixiang Liao,Chun Hu
Natural organic matter (NOM) has diverse negative impacts on water purification , however, preventing them occurrence very difficult. Herein, humic acid (10 mg/L), as the main component of NOM, is completely destructed within 120 min in the Fe 0 -Fe y C z /Fe x -GZIF-8-rGO air-saturated aqueous suspension without additional energy input, while its mineralization is followed by three kinetic constants within 480 min. During the process, HA was first complexed with Fe 0 -Fe y C z /Fe x -GZIF-8-rGO by π-π interaction and H-bonding interaction and cleaved to aromatic compounds and then to alkanes and alcohols with some small acids before 120 min. The electron paramagnetic resonance (EPR) analysis and density functional theory (DFT) calculations confirmed that a strongly polarized alkane-alcohol complex was formed after 150 min with an electron-rich hydroxyl group area in alcohol and an electron-poor alkane area. Moreover, the more electrons of alkane in the complex are delocalized and trapped by O 2 , with the adsorption of the alkane-alcohol complex on the catalyst surface based on the analyses of both electrochemical impedance spectroscopy (EIS) and chronoamperometry, greatly promoting the surface cleavage and hydrolytic process of alkane in the complex and producing more • OH for pollutant degradation than it does from the HA surface complex, which results in the highest mineralization rate in the period of 150–390 min. Our findings demonstrated that the current system is very promising for complex mixture-containing water purification without additional energy.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF CATALYSIS
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2024
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IF 6.5
Yujia Han,Teng Zong,Yuehan Wang,Ming Tian,Chaojie Wang,Nanxin Wang,Xiaodong Wang
Chemical looping H 2 O splitting is considered as a promising approach to produce hydrogen thanks to its lower energy consumption and carbon footprint compared with traditional steam reforming. Fe-based oxides have been paid much attention but suffer from inferior H 2 production rate and stability due to insufficient activation for H 2 O. Herein, it was found that the introduction of Cr into MgFe spinel oxides (MgFe x Cr 2-x O 4 , MFCO) could greatly increase the performance of H 2 O splitting driven by CH 4 reduction with the highest peak H 2 production rate of about 4.65 mmol min −1 g −1 , H 2 productivity of about 2.88 mmol g −1 and good stability during multiple redox cycles for MFCO-46 (the atomic ratio of Fe and Cr of 2:3), which exceeded most of the state-of-the-art Fe-based oxides. This originated from the Cr doping promoting Fe 0 nanoparticles exsolution by activating CH 4 and Fe-O v -Cr species formation which relay catalyzed H 2 O splitting and was favorable for the fast recovery of lattice oxygen converted.
研究领域:
化学工程
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材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Jiayin Li,Wen Wen,Shuzhuo Bai,Jing Zhang,Chenyu Wu,Jintao Wu,QingQing Huang,Yalin Zhang,Chunyi Cai,Liyun Cao,Yijun Liu,Haibo Zhang,Hua Tan,Jianfeng Huang
The instability of the interfacial structure during the synthesis of iron carbodiimide (FeNCN) leads to a decline in its electrochemical performance during cycling. By depositing FeF 3 particles on the surface of FeNCN, the in-situ transformation of this FeF 3 nanolayer into a FeF 2 nanolayer effectively utilizes the discharge product Fe 0 . This process constructs a mechanically stable sandwich-structured SEI film, thereby enhancing the stability of the FeNCN electrode interface. Consequently, the FeNCN electrode exhibits a capacity of 350.54 mAh g −1 after 2000 cycles at 2 A g −1 , with a capacity retention rate of 99.54 %. This strategy provides crucial theoretical and technical insights for regulating carbodiimide-based materials to achieve stable, long-cycle performance in electrode materials.
研究领域:
材料科学
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电化学
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纳米技术
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储能
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2024
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IF 8
Qi Fang,Yanling Tan,Ran Yan,De Zhang,Mi Li,Xiaoyan Wu,Yilong Hua,Wenjing Xue,Rongzhong Wang
Nanoscale zerovalent iron (Fe 0 )-based materials have been demonstrated to be a effective method for the U(VI) removal. However, limited research has been conducted on the long-term immobilization efficiency and mechanism of Fe 0 -based materials for U(VI), which are essential for achieving safe handling and disposal of U(VI) on a large scale. In this study, the prepared carboxymethyl cellulose (CMC) and sulfurization dual stabilized Fe 0 (CMC-Fe 0 /FeS) exhibited excellent long-term immobilization performances for U(VI) under both anoxic and oxic conditions , with the immobilization efficiencies were respectively reached over 98.0 % and 94.8 % after 180 days of aging. Most importantly, different from the immobilization mechanisms of the fresh CMC-Fe 0 /FeS for U(VI) (the adsorption effect of –COOH and –OH groups, coordination effect with sulfur species, as well as reduction effect of Fe 0 ), the re-mobilized U(VI) were finally re-immobilized by the formed FeOOH and Fe 3 O 4 on the aged CMC-Fe 0 /FeS. Under anoxic conditions , more Fe 3 O 4 was produced, which may be the main reason for the long-term immobilization U(VI). Under oxic conditions, the production of Fe 3 O 4 and FeOOH were relatively high, which both played significant roles in re-immobilizing U(VI) through surface complexation, reduction and incorporation effects.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Huizhen Shen,Li Chen,Cailong Zhou,Jingcheng Du,Chenyang Lu,Hao Yang,Luxi Tan,Xinjuan Zeng,Lichun Dong
Nanoscale zero-valent iron (NZVI, Fe 0 ) has been widely used for reduction of strong toxic Cr(VI) to low toxic Cr(III), however, given the easy aggregation of NZVI, developing new substrate support for NZVI is highly desirable. In this study, via a simple in-situ growth method, NZVI was immobilized on porous TpPa-1 covalent organic frameworks (COFs), making it an effective adsorbent for adsorption and reduction of Cr(VI) from aqueous solution. Meanwhile, to make the composite of NZVI and COFs a uniform system, dopamine (DOPA) was used as a connector to combine them. The COFs with porous crystal structure provides controlled anchors for Fe 0 loading as well as the reaction sites. Results verify that the Fe 0 / [email protected] exhibited an excellent performance in Cr(VI) removal due to synergistic effect of the composite, with the maximum removal capacity up to 516 mg/g. Furthermore, it maintained high removal capacity under acidic, neutral and alkaline environments. Therefore, the Fe 0 / [email protected] is a promising material for Cr(VI) removal from wastewater in practical application.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 32
·17366-17379
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IF 12.732
Junjie Zhang,Wenran Gao,Yamei Yue,Wei Wang,Fatang Tan,Xinyun Wang,Xueliang Qiao,Po Keung Wong
Herein, biactive centers of Fe0-anchored graphitic N-rich graphene (Fe-GNG) were constructed via coordination and hydrogen bonding assemblies followed by calcination. The obtained Fe-GNG exhibited excellent peroxymonosulfate (PMS) activation ability to degrade diverse organic pollutants, accompanied by very low activation energy. Electron paramagnetic resonance and quenching experiments indicated that ˙OH and 1O2 were the predominant reactive species responsible for organics degradation, and were generated from PMS activation mainly at Fe0 and graphitic N sites, respectively. The degradation process had wide pH (2.2–10.3) and temperature (5–45 °C) application ranges, and a high tolerance to common matrix species, which enabled application to natural water systems. Furthermore, the magnetic Fe-GNG catalyst exhibited high stability and reusability, still degrading over 90% organics after five runs. This work provides a feasible strategy to construct multiple active sites for PMS activation, and clarifies the synergistic effect of metal and carbonaceous materials in radical and nonradical activation processes.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2019
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IF 5.108
Kun Wang,Yuebing Sun,Jingchun Tang,Juan He,Hongwen Sun
A novel ball milled Fe 0 -biochar composite was synthesized by ball milling the mixture of biochar (pyrolyzed at 300 °C, 500 °C, and 700 °C) and micron grade iron powder. FTIR, SEM , TEM-EDS, XRD , and XPS were applied to characterize this composite. XRD results showed that iron carbide phase was formed during the ball milling process. The ability of this synthesized composited to remove aqueous Cr(VI) was tested. Removal rates of Cr(VI) (49.6%, 65.8%, and 97.8%, respectively) by ball milled Fe 0 -biochar composite consisting of biochar pyrolyzed at 300 °C (300BMFe 0 -BC), 500 °C (500BMFe 0 -BC), and 700 °C (700BMFe 0 -BC) were much higher than those (19%, 11%, and 4%, respectively) by pristine biochar pyrolyzed at 300 °C (300BC), 500 °C (500BC), and 700 °C (700BC). Cr(VI) removal rate by 700BMFe 0 -BC increased from 15.4% to 97.8% when prolonging ball milling time from 6 h to 48 h. Ball milling promoted the combination of Fe 0 and biochar as well as reduced the hydrodynamic diameter of the composite. Acidic conditions favored Cr(VI) removal. Ball milling exposed the functional groups of biochar and improved its Cr(VI) removal rate. Raman spectra showed that the degree of graphitization in 700 °C ball milled biochar (700BMBC) was the highest. Electrochemical analysis demonstrated that 700BMBC had the highest electron transfer capacity. In the presence of Fe 0 , graphitized structure in 700BMBC acted as an electron conductor, facilitating electron transfer from Fe 0 to Cr(VI). Ball milling also destroyed the surface iron oxide layer to regenerate the composite.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Shizong Wang,Jianlong Wang
High efficient activator is highly desired in the field of persulfate-based advanced oxidation process. In comparison with the previous studies, this study adopted nitrogen, sulfur and oxygen co-doped carbon material to support Fe 0 encapsulate in Fe 3 O 4 to prepare iron-based modified carbon composite (Fe 0 @Fe 3 O 4 -MC) by a facile two-step pyrolysis. Fe 0 @Fe 3 O 4 -MC was then used for degradation of sulfamethoxazole. The results showed that Fe 0 @Fe 3 O 4 -MC had superior catalytic activity for PMS activation due to the synergistic effect of iron-based compound and modified carbon. In the presence of 0.1 g/L of Fe 0 @Fe 3 O 4 -MC, SMX (0.04 mM) could be completely degraded within 120 min at pH 3.4 and 3 mM of PMS. The SMX degradation followed pseudo first-order kinetic model, with the rate constant of 0.12 min −1 , and the mineralization of SMX achieved 48.4%. Sulfate radicals dominated in the SMX degradation. In addition to Fe 0 and Fe 3 O 4 , carbon defects, graphitic N, sulfur and FeN 4 also contributed to PMS activation. Fe 0 oxidation was the rate-limiting step for PMS activation. Dissolved oxygen made a minor contribution to Fe 0 oxidation. The intermediate products of SMX degradation were identified, and two pathways of SMX degradation were proposed. The influencing factors on SMX degradation were studied, including pH, temperature, PMS concentration, Fe 0 @Fe 3 O 4 -MC dosage, chloridion, carbonate and humic acids, and the influencing mechanism was discussed. This study could provide an efficient PMS activator for the degradation of emerging organic pollutants in water and wastewater.
研究领域:
环境科学
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催化材料
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2018
·
IF 3.927
Kané Rabé,Lifen Liu,Noor Ahmed Nahyoon,Yizhen Zhang,Ahmed Mahmoud Idris
A visible-light Z-scheme g-C 3 N 4 /Fe 0 /TiO 2 anodic catalyst was tested with cathodic WO 3 in photocatalytic Fuel Cell (PFC) that efficiently degrades berberine chloride and simultaneously generate electricity at pH 2,5,7 and 13. The Stainless-steel mesh electrodes loaded with prepared catalyst were irradiated by visible-light in single chamber PFC. The highest removal of berberine Chloride, cell voltage, and power density were 91%, 0.8 V, and 16.4 W/m 2 at a current density of 2.02 mA/cm 2 , respectively after 90 min irradiation in 0.05 M Na 2 SO 4 electrolyte, with 10 Ω external resistance. The impacts of pH and initial concentration of BEC on photocatalytic degradation and cell voltage were evaluated. The cell current density is enhanced while the photocatalyst activity increased. The constructed PFC maintained high-performance after 5 uses. Its use in degrading wide spectrum refractory pollutants and generate electricity is expected for the proved catalyst design, paired electrodes and high PFC performance for practical wastewater treatment.
研究领域:
环境科学
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材料科学
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光催化技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
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IF 9.038
Yating Yan,Huayu Zhang,Wei Wang,Wenchao Li,Yueping Ren,Xiufen Li
Developing highly efficient, reusable, non-toxic and low-cost catalysts is of great importance for persulfate-based advanced oxidation processes (AOPs). In this work, ferrocene was mixed into paraffin to prepare a candle, and the iron-containing candle soots were collected and heated at 500 °C~900 °C under N 2 atmosphere for 1 h to prepare magnetically recyclable Fe 0 /Fe 3 O 4 @porous carbon (Fe 0 /Fe 3 O 4 @PC) catalysts. The Fe 0 /Fe 3 O 4 @PC-700 obtained after pyrolysis at 700 °C exhibited the best catalytic activity for sulfamethoxazole (SMX) degradation. 10 mg/L SMX could be completely degraded within 10 min by 0.2 g/L of Fe 0 /Fe 3 O 4 @PC-700 and 0.5 mM PMS at pH 5.0. The carbon shell effectively inhibited the Fe leaching of Fe 0 /Fe 3 O 4 @PC-700, and 99.73% of Fe was retained after five consecutive cycles. In the Fe 0 /Fe 3 O 4 @PC-700/PMS system, SMX was degraded through the sulfate radical (SO 4 · ¯ ), hydroxyl radical (·OH), superoxide radical (O 2 · ¯ ) dominated radical pathway, and the singlet oxygen ( 1 O 2 ) dominated non-radical pathway. The coexisting inorganic ions and natural organic matters (NOM) in actual water inhibited the degradation of SMX. Finally, four possible degradation pathways were proposed based on the degradation intermediates of SMX. This work provides a facile heat treatment of iron-containing candle soots strategy to prepare the metal@carbon catalysts for PMS-based AOP.
研究领域:
环境科学
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催化材料
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水处理技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）