Journal of Energy Chemistry
·
2016
·
IF 2.322
Zhipeng Xie,Qi Su,Anhong Shi,Bin Yang,Baixiong Liu,Jianchai Chen,Xiaochun Zhou,Dingjian Cai,Liang Yang
A green low-cost redox flow battery using Zn/Zn 2+ redox couple in HAc/NaAc medium and Fe 2+ /Fe 3+ redox couple in H 2 SO 4 medium was first proposed and investigated for potential stationary energy storage applications . The presence of HAc/NaAc in the negative electrolyte can keep the pH between 2.0 and 6.0 even when a large amount of H + ions move into negative electrolyte from positive electrolyte through ion exchange membrane . In the pH range of 2.0–6.0, the chemical reaction of Zn species with H + species is very insignificant; furthermore, the electroreduction of H + ion on the negative electrode is significantly suppressed at this pH range. The zinc-ferrum redox flow battery (Zn/Fe RFB) operated within a voltage window of 0.5–2.0 V with a nearly 90% utilization ratio, and its energy efficiency is around 71.1% at room temperature. These results show that Zn/Fe RFB is a promising option as a stationary energy storage equipment.
研究领域:
能源科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2019
·
IF 6.35
Lijie Wu,Qi Ding,Xin Wang,Ping Li,Nannan Fan,Yongqing Zhou,Lili Tong,Wen Zhang,Wei Zhang,Bo Tang
Drug-induced liver injury (DILI) can cause liver failure and even death in severe cases, gravely threatening human health. The treatment of DILI remains a clinical challenge, mainly due to the lack of efficient and accurate diagnosis. Therefore, developing an accurate diagnosis approach is imperative to boost the timely treatment for DILI. As the primary organ of iron storage, liver’s functions are tightly linked to iron homeostasis. Thus, monitoring iron homeostasis is promising for the diagnosis and treatment of DILI. Hence, we reported a new near-infrared fluorescent probe (LCy7) that enables real-time and in vivo visualizing of Fe2+ in drug-induced liver injury. In this design, Fe2+ would bind to the N4O ligand in LCy7 and conduce to the C–O bond broken in the presence of O2, which restore the masked QCy7 emitting luminous near-infrared fluorescence. Utilizing LCy7, the increase in Fe2+ was distinctly witnessed in hepatocytes under endoplasmic reticulum stress by acetaminophen (APAP) stimulation. In vivo near-infrared fluorescence imaging revealed the conspicuous rise in Fe2+ in the liver of mice during APAP-induced liver injury. We further unprecedentedly disclosed that endoplasmic reticulum stress was accompanied by the overload of Fe2+ in injured liver of these mice. Collectively, this work will facilitate a greater understanding of the pathogenesis of DILI, and also provide a powerful new tool for DILI diagnosis and treatment.
研究领域:
药理学
·
毒理学
·
医学影像学
·
生物化学
✓ 已验证
DOI
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 21
·4188
·
IF 4.6
Chunhua Zhu,Jie Yao,Meng Du,Henghui Xu,Jintao Yu,Haotian Zhu,Zeyu Zhou,Jubing Zhang
As a conceptual study for low-energy hydrogen production, potentially coupled with off-grid photovoltaics, this work focuses on overcoming the constraint of the oxygen evolution reaction (OER), which features a high anode potential and significant overpotential. To reduce energy consumption, the Fe2+oxidation reaction is employed to replace OER, coupled with Fe2+regeneration using natural biomass. Experimental results reveal that Fe2+oxidation reaction is an effective substitute, with an initial oxidation potential of 0.5 V (vs. Hg/Hg2SO4), much lower than that of OER. Fe2+regeneration is notably influenced by both biomass type and reaction temperature. Chlorella pyrenoidosa (CP) achieves the highest Fe3+reduction rate of 90.5% at 190 °C. Water-soluble organic compounds generated during biomass oxidation exert a negative impact on Fe2+electrooxidation by accumulating on or coating the electrode surface, and the compounds derived from CP exert a less detrimental effect. Moreover, enhancing magnetic stirring, elevating temperature, and selecting an appropriate anode material can significantly boost the oxidation reaction. Under optimized conditions, the current density during electrolysis of CP filtrate at 1.1 V reaches 280 mA/cm2, much higher than values reported in similar studies. This highlights the great potential of this co-electrolysis approach for efficient hydrogen production driven by off-grid photovoltaic power.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Cuihuan Lv,Jinpeng Cai,Guohui Wang,Jiuxiu Chen,Hao Lai,Peilun Shen,Dianwen Liu
Organic depressants often exhibit low selectivity at high dosages, and introduce risks of concentrate dewatering. The combined depressants composed of inorganic and organic substances can significantly reduce reliance on organic depressant dosage, providing a promising solution to this challenge. In order to achieve highly efficient separation of sphalerite and pyrite in the CuSO 4 -butyl xanthate (PBX) flotation system, the combined depressant Fe 2+ / baicalin (BCL) was innovatively employed to inhibit copper-activated pyrite. The flotation tests indicate that compared with the single depressant BCL, the combined depressant Fe 2+ /BCL demonstrates superior selective inhibitory effects on copper-activated pyrite. For artificially mixed ores, a zinc concentrate is obtained with a zinc grade of 62.33 % and a zinc recovery of 93.86 % when the combined depressant of 10 mg/L Fe 2+ and 5 mg/L BCL are used, and the separation efficiency is significantly improved from 40.66 to 79.69 %. Adsorption characteristic studies indicated that BCL exhibits stronger affinity for copper-activated pyrite than for sphalerite. The introduced Fe 2+ provide additional active sites, thereby enhancing the depression effect on copper-activated pyrite. Following Fe 2+ /BCL modification, the adsorption of PBX on copper-activated pyrite was hindered, while having no substantial impact of that on sphalerite, which is also confirmed by molecular dynamics simulations. Therefore, the combined depressant Fe 2+ /BCL markedly widened the hydrophobicity difference between sphalerite and pyrite, creating the potential for their effective separation.
研究领域:
矿物加工
·
浮选化学
·
表面化学
·
提取冶金
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2024
·
IF 5.6
Peng’an Zhu,Jiangle Zhang,Jingjing Jin,Xing Huang,Xinfeng Zhang
Ferrous ion (Fe 2+ ) can indicate the redox situation of water and also plays an important role in maintaining the ecological balance of water bodies. However, due to the redox-active property of Fe 2+ , it is still a huge challenge to sensitively and accurately determine Fe 2+ especially in interstitial water. Herein, we prepared a ferrozine gel rod for valence fixation during sampling and subsequent smartphone-based detection of Fe 2+ . The electrode potential of the redox pair can be varied through the formation of Fe 2+ -ligand complexes, and when E complex was higher than E O 2 / OH − , the oxidation of Fe 2+ by O 2 was hindered, thus achieving the valence fixation of Fe 2+ . Six ligands were screened, and it was found that ferrozine could effectively increase the redox potential after complexing with Fe 2+ , and also exhibits an obvious color change while fixing the valence of Fe 2+ . To facilitate Fe 2+ detection, a cross-linked porous polymer gel rod prepared by acrylamide and sodium alginate was used to encapsulate the ferrozine molecules. The ferrozine gel rod enabled fixation the valence of Fe 2+ longer than 30 days, and the resulted purple-red color was pictured and analyzed by a smartphone. Ultimately, the developed ferrozine gel rod sensing system was able to achieve sensitive and linear detection of Fe 2+ in the range of 1–200 μM with the limit of detection as low as 0.33 μM, and it also exhibited excellent selectivity and anti-interference ability. The accuracy and reliability of the method was verified by the determination of Fe 2+ in spiked water samples and certified standard reference water samples. Finally, the ferrozine gel rod sensing system was successfully applied to in-situ detection of Fe 2+ in interstitial water, overlying water and upper water of lake and river. This facile system that enabled valence fixation and fast detection is promising for detection of Fe 2+ in environmental waters.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 4
·1-12
·
IF 5.3
Han Hong,Ji Yuhan,Zhao Xin,Yin Ling,Liu Xiangyi,Sha Jingquan
A colorimetric sensing method for salicylic acid (SA) was developed by designing and fabricating bimetallic oxide nanozymes. Firstly, by calcinating MIL-100(Fe)@PMo 12 (MOFs@POMs) at different temperature, Fe 2 (MoO 4 ) 3 -Ts (T = 400℃, 500℃, 600℃, 700℃) nanoparticles (NPs) were successfully prepared. Secondly, by evaluating the peroxidase-like activities, Fe 2 (MoO 4 ) 3 –600 NPs shows the best peroxidase-like activity attributed to the Fenton-like effect and the synergistic coupling interaction between Mo and Fe. Finally, based on the specific complexation between SA and Fe 3+ , a sensitive colorimetric sensor for SA was established, which exhibits superior selectivity and interference with a detection limit of 0.11 μM and a linear range of 10 to 100 μM, the lowest LOD for SA to date, to the best of our knowledge. Graphical abstract
研究领域:
材料科学
·
分析化学
·
生物医学
✓ 已验证
DOI
PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2024
·Vol. 416
·期 8
·1951-1959
·
IF 3.8
Sun Shuo,Chen Changyu,Fu Xingyu,Zhang Yandong,Wu Xinyue,Hao Junkai,Feng Jing,Hu Lei,Yao Wenli,Yan Zhengquan
To conveniently monitor bioactive cysteine (Cys) and Fe 2+ in practice, a kind of poly-β-cyclodextrin strengthen praseodymium oxide (Pr 6 O 11 ) porous oxidase mimic ( p -β-CD@Pr 6 O 11 ) was constructed by virtue of the strong coordination between nano Pr 6 O 11 and poly-β-cyclodextrin substrate. After its microstructure and physicochemical property were characterized in detail, it was noted that porous p -β-CD@Pr 6 O 11 exhibited excellent enzyme-like catalytic activity to accelerate the oxidation of 3,3′,5,5,′-tetramethylbanzidine (TMB) and 2,2′-azinobis (3-ethylbenzo-thiazoline-6-sulfonic acid) ammonium salt (ABTS) with significant color-enhancement effect in the air. Based on the signal amplification, trace Cys could exclusively deteriorate the UV-vis absorbance at 653 nm of p -β-CD@Pr 6 O 11 -TMB and Fe 2+ alter the one at 729 nm of p -β-CD@Pr 6 O 11 -ABTS with visual color changes. Under the optimized conditions, the proposed p -β-CD@Pr 6 O 11 -TMB and p -β-CD@Pr 6 O 11 -ABTS systems were successfully applied for dual-channel monitoring of Cys in Cys capsules and fetal bovine serum and Fe 2+ in agricultural products with quite low detection limits, i.e., 7.8×10 −9 mol·L −1 for Cys and 6.93×10 −8 mol·L −1 (S/N=3) for Fe 2+ , respectively. The synergetic-enhancement detection mechanisms to Cys and Fe 2+ were also proposed. Graphical
研究领域:
分析化学
·
材料科学
·
生物化学
·
纳米技术
·
环境监测
·
生物传感器
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2016
·
IF 5.557
He Ding,Fusheng Pan,Ena Mulalic,Hassan Gomaa,Weidong Li,Hao Yang,Hong Wu,Zhongyi Jiang,Baoyi Wang,Xingzhong Cao,Peng Zhang
In this study, Cu + and Fe 2+ ions were co-impregnated onto carbon nitride nanosheets via polydopamine chelating, and then incorporated into a Pebax matrix to fabricate the facilitated transport hybrid membranes. The homogeneously dispersed nanosheets disturb the packing of Pebax chains and render the hybrid membrane an appropriate free volume property. The existence of stabilizer Fe 2+ on Cu + Fe 2+ @CNs prevents the disproportionation and oxidation of Cu + , which is an efficient facilitated transport carrier for thiophene via π-complexation in gasoline desulfurization. Accordingly, the hybrid membranes exhibit superior desulfurization performance along with good stability even at high operation temperature. Especially, when the content of Cu + Fe 2+ @CNs is 5 wt%, the membrane achieves the optimum desulfurization performance with a permeation flux of 13.42 kg/(m 2 h) (18.76% higher than that of pure Pebax membrane) and an enrichment factor of 7.11 (28.80% higher than that of pure Pebax membrane) under 60 °C for octane-thiophene model gasoline with thiophene content of 1312 ppm. Besides, the membrane shows good stability in the long-term desulfurization under high operation temperature of 60 °C for 10 days and keeps the stability of incorporated Cu + for six months. The study offers a facile approach to enhance the carrier stability in high-performance facilitated transport membranes.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 51
·77771-77787
·
IF 5.19
Yu Jinming,Yan Weiwen,Zhu Bin,Xu Zimu,Hu Shuheng,Xi Wenhao,Lan Yan,Han Wei,Cheng Cheng
Carbamazepine (CBZ) is a typical psychotropic pharmaceutical which is one of the most commonly detected persistent pharmaceuticals in the environment. The degradation of CBZ in the aqueous solution was studied by a direct current (DC) gas–liquid phase discharge plasma combined with different catalysts (H 2 O 2 or Fe 2+ ) in this study. The concentrations of reactive species (H 2 O 2 , O 3 , and NO 3 − ) and •OH radical yield in the liquid were measured during the discharge process. The various parameters that affect the degradation of CBZ, such as discharge powers, initial concentrations, initial pH values, and addition of catalysts, were investigated. The energy efficiency was 25.2 mg·kW −1 ·h −1 at 35.7 W, and the discharge power at 35.7 W was selected to achieve the optimal balance on the degradation effect and energy efficiency. Both acidic and alkaline solution conditions were conducive to promoting the degradation of CBZ. Both H 2 O 2 and Fe 2+ at low concentration (10–100 mg/L of Fe 2+ , 0.05–2.0 mmol/L of H 2 O 2 ) were observed contributing to the improvement of the CBZ degradation rate, while the promotional effect of CBZ degradation was weakened even inhibition would occur at high concentrations (100–200 mg/L of Fe 2+ , 2.0–5.0 mmol/L of H 2 O 2 ). The degradation rate of CBZ was up to 99.1%, and the total organic carbon (TOC) removal efficiency of CBZ was up to 67.1% in the plasma/Fe 2+ (100 mg/L) system at 48 min, which suggested that high degradation rate and mineralization efficiency on CBZ could be achieved by employing Fe 2+ as a catalyst. Based on the intermediate products identified by Ultra Performance Liquid Chromatography Tandem Mass Spectrometry (UPLC–MS), the possible degradation pathways were proposed. Finally, the growth inhibition assay with Escherichia coli ( E. coli ) showed that the toxicity of plasma/Fe 2+ -treated CBZ solution decreased and a relatively low solution toxicity could be achieved. Thus, the plasma/catalyst could be an effective technology for the degradation of pharmaceuticals in aqueous solutions.
研究领域:
环境科学
·
化学工程
·
药学
·
等离子技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Yanmei Li,Jing Wang,Ziyang Xiang,Junhui Yang,Jinglin Yin,Xin Guo,Wenlei Wang
In this study, a carbonized aerogel (CA) decorated with Mn-FeOOH hybrid nanoparticles was prepared and has been used as a better heterogeneous photo-Fenton catalyst. Mn doping accelerated the regeneration of Fe 2+ and promoted the decomposition of H 2 O 2 while producing many hydroxyl radicals (·OH), which solved the mass transfer problem in the traditional heterogeneous Fenton system. The amount of·OH in the Mn-FeOOH@CA/H 2 O 2 system within 40 min was 2.4 times higher than that in the FeOOH@CA/H 2 O 2 system, which further indicates that·OH was the main active species. High-porosity CA has been designed as an electron transport channel. During photocatalysis , electron transfer occurred between the Mn-FeOOH composite material and CA. The Fe 2+ could be used as reaction sites to promote the activation of H 2 O 2 on the surface of 1-Mn/FeOOH, and achieved 100 % As(III) degradation efficiency within 25 min. The catalyst maintained more than 80 % of its original oxidation capacity after five cycles of experiments, which indicates that it has good durability. This work is expected to provide rational design of heterometallic doped materials with oxygen vacancies to treat arsenic pollution.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Da Ouyang,Ronghao Wu,Zhaojun Xu,Xiaomin Zhu,Yimin Cai,Ruihuan Chen,Changyin Zhu,Damià Barceló,Haibo Zhang
Advanced oxidation processes (AOPs) based on persulfate (PDS) activation by iron materials have attracted significant attention due to their high organic pollution removal efficiency and relatively low remediation costs. However, one of the iron-based materials’ shortcomings is the weak activation ability of Fe 3+ on PDS and the low sustainability of Fe 2+ in the oxidation environment. In this study, biochar-supported molybdenum dioxide (MoO 2 @BC) was employed as a co-catalyst to enhance the Fe 3+ based PDS activation for Bisphenol A (BPA) degradation. Results showed that >96 % of BPA was removed during 60 min, and the BPA degradation efficiencies only slightly decreased after four reuses of MoO 2 @BC. Electron paramagnetic resonance (EPR) analysis and quenching experiments indicated that reactive oxidation species (ROSs) contributing to the degradation of BPA were SO 4 − , OH and 1 O 2 . Besides, it was found that biochar supporting favours the adsorption of Fe 3+ on the MoO 2 surface and promotes the electron transfer from Mo(IV) to Fe 3+ based on the combination of X-ray photoelectron spectroscopy (XPS) analysis, electrochemical tests and density functional theory calculation (DFT). This work provides a new insight for enhancing the performance of organic contaminants degradation through AOPs based on persulfate activation by iron material.
研究领域:
环境科学
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Huiming Xiang,Weiye Liu,Lianghu Su,Sujuan Chen,Yu Han,Chunyuan Zhu,Saier Wang,Chaoqun Tan,Longjiang Zhang
The synthesis of ammonia through nitrate reduction has received increasing attention due to its ability to simultaneously achieve wastewater treatment and energy production. This study investigated the mechanism of high concentration nitrate reduction processes using Fe/Fe 2+ process. Batch tests were carried out in high level nitrate reduction in Fe/Fe 2+ system with different particle size iron powder to investigate the evolution of nitrate, nitrite, ammonium, nitrogen balance, and pH in the liquid phase. The characterization results showed that the solid products were γ-FeOOH when ZVI and nitrate react with lower activity. With the increasing of reduction reactivity, green rusts (GRs) generated and divided the reduction process into two phases. ZVI transformed into GRs and finally produced Fe 3 O 4 . The generation pathways of GRs in this study were mainly consist of the partial oxidation of Fe 2+ and the hydrolysis of Fe 2+ combing with the oxidation of Fe(OH) 2 . The reactivity between ZVI and nitrate plays a pivotal role in the formation of GRs. This study has provided a more comprehensive exploration of the formation mechanism of green rust during nitrate reduction.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）