CHEMICAL ENGINEERING JOURNAL
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2019
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IF 8.355
Jing-Ping Zhu,Yi-Li Lin,Tian-Yang Zhang,Tong-Cheng Cao,Bin Xu,Yang Pan,Xi-Tong Zhang,Nai-Yun Gao
Iohexol can hardly be removed in conventional wastewater treatment processes due to its non-biodegradable and hydrophilic characteristics. In this study, a kinetic model was established to describe iohexol degradation in Fe (II)-activated persulfate system. The developed model can well predict iohexol degradation and evolution of sulfate radical with various initial iohexol and oxidant (ferrous iron and persulfate) concentrations under various water matrix. The rate constant of iohexol reacting with sulfate radical was calculated as (1.83 ± 0.10) × 10 9 M −1 s −1 . The effects of the two most common components in natural water bodies, chloride ion and natural organic matter (NOM) on iohexol degradation, were also studied. Both experimental data and model results showed that the low concentration of chloride ion promoted iohexol degradation while high concentration inhibited it, and NOM slightly inhibited iohexol degradation. Besides, radical quenching tests were employed to identify the main radicals formed in the system and further verified the model accuracy. The model is also capable of predicting the atrazine degradation with the correlation coefficients between the experimental data and predicted results above 0.97, suggesting the applicability of the established model for some other recalcitrant contaminant degradation in the Fe 2+ /PS system.
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Cancer Nanotechnology
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2025
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IF 4.8
Zhou Youwei,Cheng Sheng,Shu Lei,He Wenzhu,Chen Ying,Wang Yan,Li Xuqing,Wei Zhaolian
Objective The targets and active components that affect the prognosis of cervical cancer remain unclear. Methods Three microarray datasets were collected for differentially expressed genes (DEGs) screening. The pathway, function, protein interaction and prognosis were analysed. The active components, related targets, the active ingredient-target gene network were conducted. The protein expression of the hub gene was validated through immunohistochemistry and Nanodrugs Que-Fe NDs were prepared and validated by in vitro cellular functionalization experiment. Results 162 upregulated and 145 downregulated DEGs were screened out, including 10 hub genes, which were mainly clustered in DNA replication, cell division, proliferation, and cycle. The results of active ingredient-target gene network showed that the traditional Chinese medicine quercetin has the potential therapeutic effect on cervical cancer via targeting PCNA. Experiments focused on cellular functionalization demonstrated that the synthesized Que-Fe nanodots (NDs) were capable of decreasing the levels of proliferating cell nuclear antigen (PCNA) expression and suppressing the in vitro proliferation of HeLa cells. Conclusion The growth of cervical cancer HeLa cells was suppressed in vitro by Que-Fe NDs. This finding indicates a promising novel therapeutic target that warrants additional investigation.
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DOI
PubMed
高影响因子
CARBON
·
2019
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IF 7.466
Hao Yang,Cuimei Fu,Yijian Sun,Lina Wang,Tianxi Liu
Olivine-type LiMnPO 4 (LMP) cathodes have gained enormous attraction for Li-ion batteries (LIBs) due to high discharge platform, theoretical capacity and thermal stability. However, it is still challenging to achieve encouraging Li-storage behavior owing to the low electronic conductivity and slow Li-ion diffusion rate of LMP. Here, the electrochemical behavior of fibrous LiFe x Mn 1-x PO 4 @carbon (LF x M 1-x P@C, x = 0, 0.25, 0.5, 0.75, 1) composites with different Fe doping amounts is investigated. Among the composites, LF 0.5 M 0.5 P@C demonstrates a superior cell performance due to a higher Li-ion diffusion coefficient (D Li ), resulting from a proper Fe doping ratio and a more uniform morphology. At a current rate of 0.2 C (1 C = 170 mA g −1 ), the LF 0.5 M 0.5 P@C cathode delivers a specific capacity of 150 mAh g −1 up to 500 cycles with a capacity retention of 119%. A longer-term cycling at 5 C for 2000 cycles can be maintained with a reversible capacity exceeding 102 mAh g −1 . The fundamental study provides an insightful guidance for future design of cathode materials with high performance.
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Journal of Energy Chemistry
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2022
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IF 13.599
Xin Li,Kang Hu,Yizhe Huang,Qingqing Gu,Yuwen Chen,Bing Yang,Rongliang Qiu,Wenhao Luo,Bert M. Weckhuysen,Kai Yan
Contaminants of heavy metals and antibiotics, which are frequently detected in water, soil and food chains with increasing prevalence in our current society, can cause potential harm to human health and disrupt human ecosystem irreversibly. Herein, we have successfully utilized biomass waste ferns contaminated by iron mines, to fabricate a first-of-its-kind high-performance class of Fe single-atom catalysts (FeSAC) by a facile pyrolysis. The optimal FeSAC-800 shows an excellent efficiency in the fast-photocatalytic degradation of six types of quinolone antibiotics (e.g., norfloxacin, levofloxacin, ciprofloxacin, enrofloxacin, lomefloxacin, flumequine) in 1 h under the simulated natural light irradiation. Based on advanced characterization, a well-defined structure of FeN 4 , confined in the porous carbon is elaborated for the FeSAC-800. Mechanism of the photodegradation is via a Fenton-like oxidation process whereas the reactive oxygen species play a key role. These findings open a new avenue for efficient, sustainable utilization of biomass waste in pollutant control.
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JOURNAL OF SOLID STATE CHEMISTRY
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2024
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IF 3.2
Lang Wang,Yonghang Zhang,Linxiang Zhou,Guangtao Luo,Zhiwei Meng,Haodong Jin,Enze Zhu,Mingli Xu
The cathode's oxygen reduction reaction (ORR) plays a crucial role in a variety of fuel cells. Developing affordable and efficient non-precious electrocatalysts for the ORR poses a major hurdle in the realm of electrochemical energy technologies. This work presents a transition metal-based catalyst, Fe-ONC, in which Fe is loaded in an oxygen-enriched nitrogen-doped carbon (NC) material. Oxygen enrichment of the catalyst was achieved by a pre-oxidation strategy. The XPS analysis reveals that Fe-ONC exhibits a higher abundance of oxidized species. The Fe of Fe-ONC exists in the form of Fe 3 O 4 particles and Fe-N x , respectively, which are uniformly distributed in the NC. The even spread of iron sites and the plentiful presence of oxygen-rich species are key factors in the superior ORR efficiency of Fe-ONC. Fe-ONC's half-wave potential (E 1/2 ) in an alkaline environment (0.1 M KOH) stands at 0.891 V, markedly surpassing the standard commercial Pt/C value (0.840 V). Additionally, Fe-ONC demonstrated enhanced longevity and resistance to ethanol in comparison to commercially available Pt/C. Fe-ONC's outstanding efficacy highlights its potential as an alternative to precious metal catalysts. The document outlines a plan for creating ORR catalytic materials that are sustainable, economical, and efficient.
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CHINESE PHYSICS LETTERS
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2024
·Vol. 41
·期 12
·128401
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IF 3.5
Xi Wen,Yang Qin,Yu Hao,Geng Chang,Kai Huang,Ming Lei,Xiaojun Shen,Yong He,Xuchao Pan,Yufeng Wu
Electromagnetic wave-absorbing materials play a crucial role in modern electronics, particularly in stealth and communication technologies. Carbon-based materials demonstrate considerable potential for the development and use of effective wave-absorbing substances, attributed to their complex structure, lightweight nature, excellent corrosion resistance, and affordability. Notably, nitrogen-doped carbon-based two-dimensional (2D) materials exhibit a more pronounced depletion effect on electromagnetic waves owing to their increased specific surface area and numerous polarization states. This article presents the successful synthesis of nitrogen-doped carbon (NC) 2D flakes using a hydrothermal method. In addition, single Fe atoms were successfully incorporated onto their surfaces, forming Fe@NC. The wave-absorbing capabilities of the Fe@NC samples were considerably improved, achieving a minimum reflection loss (RLmin) of −69.22 dB at 11.48 GHz and an effective absorption bandwidth of 5.79 GHz. The enhancement in electromagnetic wave absorption is attributed to the synergistic effects of magnetic loss, relaxation processes, dipole polarization, and electrical conduction loss. The successful synthesis of Fe@NC opens up new avenues for the development of atomically dispersed wave-absorbing materials.
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SCIENCE OF THE TOTAL ENVIRONMENT
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2022
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IF 10.753
Zedi He,Qiongfang Wang,Pinhua Rao,Lei Dong,Min Zhang,Xin Zhang,Naiyun Gao,Jing Deng
The use of antibiotics has become an indispensable part of the production and life of human society. Among them, sulfonamide antibiotics widely used in humans and animals are considered to be one of the most crucial antibiotics. However, antibiotics are difficult to degrade naturally, leading to an accumulation in the environment and a potential hazard to human health. In this paper, WS 2 as a co-catalyst could reduce trace Fe(III) to Fe(II) which exhibited a great activating ability to PS through the exposed W(IV) active sites, and formed the Fe(III)/Fe(II) cycle to degrade sulfachloropyridazine (SCP) continuously. This paper systematically discussed the degradation of SCP under different conditions in the PS/WS 2 /Fe(III) system, including the amount of WS 2 , Fe(III) concentration, PS concentration, initial pH, natural organic matter (NOM) and common anions ( NO 3 − , Cl − , HCO 3 − , HPO 4 2− and H 2 PO 4 − ). The experimental results showed that PS/WS 2 /Fe(III) system possessed a strong degradation ability for SCP in a wide pH range. NO 3 − and Cl − could promote the degradation of SCP a little. HCO 3 − , HPO 4 2− and H 2 PO 4 − could significantly inhibit the degradation of SCP. The main types of free radicals that degraded SCP were explored. In addition, the stability and reusability of WS 2 were examined, and two possible degradation pathways of SCP were proposed.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Huiyu Sun,Xinyu Gu,Jun Yu,Nannan Zhang,Zhengying Wu,Jiawei Qiang,Zhongjie Song,Yukou Du
The oxygen evolution reaction (OER), as the core half-reaction in water electrolysis (WE), plays a decisive role in determining the overall efficiency of hydrogen production. Cobalt carbonate hydroxide (CoCH) has recently emerged as a attractive material for alkaline OER due to its robust structural stability. In this study, urchin-like CoCH was employed as a precursor template to synthesize Fe and Mn co-modified CoCH catalyst on nickel foam (NF) through Mn-doping and surface Fe-modification strategies (recorded as Fe,Mn-CoCH/NF). This optimized hierarchical structure enhanced the exposure of active sites and facilitated faster electron/mass transport paths. The incorporation of Fe and Mn effectively regulated the position of d-band center and facilitated a more efficient lattice oxygen mechanism (LOM) for OER, thereby enhancing the intrinsic activity of the catalyst. Compared to the unmodified CoCH/NF, the Fe,Mn-CoCH/NF exhibited significantly improved OER catalytic activity, characterized by a substantially reduced overpotential (204 mV at 10 mA cm −2 ) in alkaline electrolyte, alongside remarkable stability. Utilizing this catalyst, an overall water splitting (OWS) system was further developed, capable of driving efficient OWS at a low cell voltage (1.49 V at 10 mA cm −2 ). Furthermore, the unique hierarchical structure of Fe,Mn-CoCH/NF contributed to mitigating electrochemical corrosion and the toxic effects of Cl − during seawater electrolysis, enabling the catalyst to maintain excellent catalytic activity and stability even in alkaline seawater system.
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PubMed
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ACS Applied Nano Materials
·
2025
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IF 5.5
Haoming Xie,Lifen Su,Yulong Yang,Jibin Miao,Ru Xia,Jiasheng Qian,Lei Miao
Water scarcity and pollution are the challenges most countries face around the world, especially the large amount of organic wastewater. Solar-driven evaporation is an environmentally friendly and high-performance technology of freshwater production. However, photothermal materials fail when the water includes complex recalcitrant pollutants such as tetracycline hydrochloride (HCL-TC) and bisphenol A (BPA). Here, Fe@carbon nanotube (Fe@CNT) arrays were prepared in situ by using acetonitrile as the carbon source and ferrocene as the catalyst, followed by further solar-driven water evaporation and photo-Fenton catalytic degradation of organic pollutants synergistically. Owing to the Fenton effect and excellent solar absorption, Fe@CNTs accelerate the separation of photogeneration electron–hole pairs to improve the degradation of organic pollution and production of freshwater. Therefore, the Fe@CNT layers show outstanding solar absorption and hydrophilicity, resulting in a high solar evaporation efficiency of 94%. Meanwhile, the degradation efficiencies of organic pollutants (methylene blue, HCL-TC, and BPA) are more than 99% due to the synergistic effect of photothermal and photo-Fenton-catalysis effects. This work provides a promising strategy for the treatment of organic wastewater in an environmentally friendly way.
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CEMENT AND CONCRETE RESEARCH
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2025
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IF 13.1
Jiaxing Ban,Barbara Lothenbach,John L. Provis,George Dan Miron,Zeyu Zhou,Dengquan Wang,Sergey V. Churakov,Bin Ma
Hydrotalcite-group layered double hydroxide (LDH) phases are important in many technical and geological contexts, and in applications ranging from environmental processes to catalysts to cements. This study systematically investigates the roles of Fe in LDH structures across varying pH conditions relevant to concrete environments, combining laboratory-based characterization, synchrotron-based techniques, and thermodynamic modeling. Elevated pH enhances Fe incorporation into the LDH phase, while suppressing ferrihydrite formation. At pH > 11, partial LDH dissolution is observed. Thermodynamic modeling and diffractometry reveal the transformation mechanism: control of the initial pH increases promotes Al(III) and Fe(III) uptake into LDH structures, while further alkalinization (pH > 11) triggers selective Al(III) dissolution, thereby increasing the M 2+ /M 3+ ratio and altering unit cell parameters. These findings elucidate the dynamics between Fe(III) incorporation in LDH and ferrihydrite precipitation, governed by pH-dependent solubility and charge-balance constraints.
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JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2025
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IF 4.6
Xueyi Ren,Honglei Tian,Jianke Li,Yuhuan Zhang
Colorimetric detection methods are prosperous in the monitoring of contaminants in food and environmental matrices. However, the traditional single-channel color changes seriously restrict the enhancement of their sensitivity and facile applications. Herein, a Fe 3+ concentration-controlled dual-channel ratiometric colorimetric sensing platform for the sensitive detection of Pb 2+ was established. Generally, the low concentrations of Fe 3+ can trigger a typical absorption peak at 652 nm of the oxidized TMB (oxTMB). While high concentrations of Fe 3+ induce colorless-to-orange change due to the generation of biphenyl quinone with strong absorption peaks at 450 nm. Interestingly, the presence of Pb 2+ could convert Fe 3+ to Fe (3+x)+ by a displacement reaction, causing a blue-to-colorless change at low Fe 3+ concentrations or an orange-to-blue color change at high Fe 3+ concentrations. The latter dual-channel color variances corresponded to a more distinguished visual quantification of Pb 2+ compared to the former one-channel changes. As such, the Pb 2+ was detected over a range of 0.625-25 µM, with a low detection limit (LOD) of 70 nM. Additionally, by integrating smartphone optical equipment and color recognition software, an intelligent platform for the instant detection of Pb 2+ was established, with a LOD of 0.30 µM. In real samples detection, the developed smartphone sensing platform demonstrated excellent recovery rates (89.0±4.6% to 111.1±7.4%), comparable to the conventional UV-Vis spectroscopy. This work sheds light on fabrication dual-channel colorimetric detection methods for enhanced sensing performance and provides a rapid, sensitive, and intelligent platform for detecting small molecular hazards in the environment.
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Desalination and Water Treatment
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2024
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IF 1
Fengli Shao,Shaoyu Zhou,Jiaxin Xu,Qiong Du,Jianqiu Chen,Jingge Shang
Nanoscale zero-valent iron (nZVI) has been proven to be more effective for the treatment of hexavalent chromium(Cr(VI)) when modified with the transition metal Cu. In this study, biochar-supported Cu/Fe bimetallic nanoparticles (Cu-nZVI/BC) were prepared and used for Cr(VI) removal from aqueous solution. The effects of the pH value, the initial concentration of Cr(VI), coexisting ions and humic acids (HA) were investigated. The compositional structures of Cu-nZVI/BC were analyzed by transmission electron microscopy, scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The maximum removal efficiency of Cr(VI) was 50.57% (126.41 ± 3.75 mg g –1 ) for Cu-nZVI/BC at pH 2. The adsorption kinetic data were in agreement with the pseudo-second- order model, which confirmed that the adsorption step was a chemical adsorption and reduction process. The presence of Ca 2+ and NO 3 – had an inhibitory effect on Cr(VI) removal, while dHA increased the removal efficiency at high concentrations. This study proves that Cu-nZVI/BC removal of solution Cr(VI) is feasible and shows significant potential in practical applications.
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