Food Chemistry-X
·
2024
·
IF 6.5
Hua Zheng,Linlin Feng,Zheng Huang,Ziwei Zou,Xiaolong Ma,Ziping Pan,Jinfeng Li,Jinxia Wu,Mei Li,Zhiheng Su
Aflatoxin B1 (AFB1) is a potent toxin in food, necessitating rapid, instant, and sensitive detection. We have engineered an electrochemical sensor to monitor AFB1 using a system composed of Fe 3 O 4 -NH 4 /AuNPs/apt-S1. The aptamer specifically recognizes AFB1, while ‘S1’ is functionalized with methylene blue to enhance the current. The RecJf exonuclease promotes the formation of the electrochemical strategy. The Fe 3 O 4 component, with its magnet properties, enables a rapid separation of solids and liquids without the need for instrumentation. The sensor exhibits a linear range for AFB1 ranging from 1 ng to 10 μg. The regression equation is I(nA) = 446.8 × logc+2085 (where I and c represent the peak current and AFB1 concentration, respectively). The correlation coefficient is 0.9508, and the detection limit is 3.447 nM. The relative standard deviation of AFB1 in peanut oil ranges from 4.80% to 6.80%. These results demonstrate that the sensor has high sensitivity, stability, repeatability, and specificity for AFB1 detection.
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PubMed
高影响因子
DALTON TRANSACTIONS
·
2026
·
IF 3.3
Hussin Elkik,Muhammad Mujahid Iqbal,Aqsa Munawar,Zhihua Yang,Fangfang Zhang,Shilie Pan
The development of robust strategies for designing high-performance ultraviolet (UV) birefringent materials has become a critical challenge. The combination of alkali metal and Ca2+ cations, which do not exhibit d–d or f–f transitions, with [NO3]− anions that possess high polarizability anisotropy results in the synthesis of three hydrated alkali metal calcium nitrates, ACa(NO3)3·2H2O (A = NH4, Rb, Cs). The title compounds were synthesized at room temperature using the water solution–evaporation technique, featuring a unique chain-like structure composed of [CaO9] polyhedra and [NO3]− units. The compounds exhibit notable optical properties, including short UV absorption edges (220–235 nm) and moderate birefringence (0.077–0.086 at 546 nm). Detailed structural investigation and theoretical analyses reveal that the birefringence is primarily due to the planar triangular arrangement of the [NO3]− groups. This research not only increases the structural diversity within inorganic materials but also provides a key approach for further studies of all-inorganic birefringent optical materials in the UV region.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Xingyu Chen,Zhihong Liu,Wenyi Zhang,Zhiguo Dong,Shengqiong Fang,Xuewei Li,Hong Liu,Wenyuan Ye,Yinhua Wan,Ping Li,Chenxiao Jiang,Jiuyang Lin
Rare earth tailings leachate, enriched in ammonium sulfate and magnesium sulfate, poses considerable environmental challenges while representing a valuable source of recoverable resources. Herein, a selective electrodialysis (SED) process was developed for the selective separation and recovery of NH 4 + and Mg 2+ from nutrient-rich tailings leachate. The influences of feed concentration, concentrate-to-diluate volume ratio, and current density on ion migration, separation efficiency, permselectivity, and energy consumption were systematically examined. Increasing the current density from 5.5 to 7.5 mA cm −2 promoted NH 4 + transport, resulting in an increase in NH 4 + recovery from 49.1% to 90.2% and NH 4 + /Mg 2+ permselectivity from 59 to 361. To overcome the limitations of single-stage separation, a three-stage ionic sieving configuration was subsequently implemented to enhance monovalent/divalent cation discrimination. The improved process achieved the production of high-purity (NH 4 ) 2 SO 4 and MgSO 4 with purities of 99.8% and 97.9%, respectively. These results demonstrate that coupling selective electrodialysis with multistage ionic sieving effectively intensifies monovalent/divalent cation separation and enables efficient resource recovery from complex industrial effluents. The proposed strategy offers a promising and sustainable solution for rare earth wastewater treatment and salt valorization.
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高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2019
·
IF 5.589
Bing Liu,Xiaochen Xu,Yuan Xue,Lifen Liu,Fenglin Yang
An integrated method of simultaneous desulfurization and denitrification from flue gas by catalytic ozonation combined with NH 3 /(NH 4 ) 2 S 2 O 8 absorption was developed for the first time. It consisted of two parts: (1) the catalytic ozonation of NO over FeO x /SAPO-34 to study the effects of the various influencing factors, and (2) the absorption–oxidation of NO x and SO 2 induced by ozone combined with a NH 3 /(NH 4 ) 2 S 2 O 8 solution in a bubble column reactor. In Part 1, results showed that under the optimal condition of a molar ratio of 0.5 for O 3 /NO, a residence time of 3 s, a water vapor volume fraction of 4%, a NO initial concentration of 536 mg/m 3 , and a SO 2 initial concentration of 343 mg/m 3 , the oxidation rate of NO was 55%. The characterizations of poisoned catalyst are briefly discussed. In Part 2, as the gas passed sequentially through the ozonizing reactor and the absorber (NH 3 /(NH 4 ) 2 S 2 O 8 solution of 0.8% ammonia and 0.2 mol/L (NH 4 ) 2 S 2 O 8 ), a NO conversion rate of approximately 92.6% and SO 2 conversion rate of 100% were obtained. The pH of the NH 3 /(NH 4 ) 2 S 2 O 8 solution had a significant impact on the NO conversion. According to the analysis of the composition of products under different pHs, a mechanism of desulfurization and denitrification based on NH 3 /(NH 4 ) 2 S 2 O 8 solutions was proposed. The reaction product as a compound fertilizer contained up to 24.5% nitrogen.
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高影响因子
BIORESOURCE TECHNOLOGY
·
2021
·
IF 9.642
Yu Li,Jing Wang,Bingyan Li,Mengdan Geng,Yan Wang,Jianguo Zhao,Baodan Jin,Yanfei Li
The extracellular polymeric substances (EPS) and microbial community structures were investigated in wastewater treatment containing copper oxide nanoparticles (CuO NPs) (reactor R1) and CuO NPs and humic acid (HA) (reactor R2) using both sequencing batch bioreactors (SBRs), and their response on resistance genes expression was analyzed. The removal of influent chemical oxygen demands (COD) and NH 4 + -N was moderately influenced under CuO NPs (5 mg/L) stress, while the function of HA (10 mg/L) was not reflected. However, the EPS production and microbial community were affected by the HA addition. The expression of different antibiotic resistance genes (ARGs), metal-resistance genes (MRGs), and int I1 was related to the primary compositions of polysaccharides and proteins in EPS and different microbial communities at the genus level. Furthermore, the expression of resistance genes was not stimulated under CuO NPs stress, and supplying HA was suggested to reduce their expression in wastewater treatment.
研究领域:
环境科学
·
微生物学
·
废水处理
·
纳米技术
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高影响因子
THERMOCHIMICA ACTA
·
2011
·
IF 1.908
Xiaohong Zhao,Xueqiao Xie,Yongsheng Yan
Binodal data of poly(propylene glycol) PPG 400 + salt ((NH 4 ) 2 SO 4 , MgSO 4 , and KCl) + H 2 O systems were determined at T = 298.15 K, and binodal data of PPG 400 + KAc + H 2 O system was determined at T = (298.15, 308.15, and 318.15) K. Moreover, the binodal curves were fitted to Merchuk equation, and the tie-lines were fitted to both the Othmer–Tobias and Bancroft equations. The effects of temperature and salts on the binodals and tie-lines of the investigated ATPSs were also studied. Finally, the salting-out ability of salts on the polymer was obtained by fitting the Setschenow-type equation to the tie-line data to derive a salting-out coefficient ( k S ) for each salt. For potassium salts, the relative effectiveness of the anions in inducing the phase segregation in ATPSs follows the Hofmeister series. The relative salting-out effectiveness of the sulfate salts is influenced by complexation of the cations by PPG.
研究领域:
化学工程
·
生物技术
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高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Hao Xiong,Hanyou Zhang,Baisheng Sa,Ping Li,Lingyan Lin,Aijun Yang,Jiansheng Li,Jinquan Hong,Linqin Jiang,Yu Qiu
All-inorganic halide perovskite nanocrystals (PNCs) have attracted extensive attention due to their potential for the next-generation displays. The ammonium and halide composition affect strongly the photoelectrical properties and the long-term stability of PNCs. In this work, we present a novel class of mixed all-inorganic (Cs,NH 4 )Pb(Br,X) 3 (X = Cl, Br, I) NCs prepared via cation/anion co-exchange reaction between CsPbBr 3 NCs and the mechanochemically reacted NH 4 Pb n X 2n+1 (X = Cl, Br, I, n = 1 or 2) powders. The cubic morphologies of (Cs,NH 4 )Pb(Br,X) 3 NCs with different halogen element combinations were successfully obtained. In the meanwhile, the extended emission ranges from deep-blue (453 nm) to warm-yellow (564 nm). Higher PLQY and higher stability against ambient air and UV light were achieved simultaneously by controlling the ion co-exchanging process. The photoluminescence quantum yield (PLQY) of (Cs,NH 4 )Pb(Br,X) 3 (X = Cl, Br, I) NCs were also significantly enhanced compared with that of pure CsPbBr 3 after ions exchanging (>85% versus 58%). In addition, the stability of (Cs,NH 4 )Pb(Br,X) 3 (X = Cl, Br, I) NC thin films under the UV-irradiation and in the ambient atmosphere were also dramatically improved. The cation/anion co-exchanging synthetic strategy developed in our research provides a new pathway to modulate and realize mixed-ion PNCs with high optoelectronic performance.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Ketao Shi,Youbing Zhu,Zhen Xu,Nianming Jiao,Hui Wang
The metal coordination state and the corresponding acid property of zeolite closely relate to its catalytic performance. In this study, DBD-plasma (dielectric barrier discharge-plasma), a low-temperature and energy-efficient external activation method, was proposed to activate the NH4+-type ZSM-5 zeolite and to regulate the Al coordination. It was found that DBD treatment could efficiently decompose NH4+ species at 115 °C, far below that required for calcination (550 °C). Characterizations, including X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), 27Al magic angle spinning nuclear magnetic resonance (27Al MAS NMR), and pyridine-adsorption infrared spectroscopy (Py-IR), revealed that DBD-plasma treatment could inhibit zeolite framework destruction and retain more framework Al and mesoporous structure, thus improving the stability and enhancing the amount of medium-strong Brønsted acid sites. In n-hexane cracking, DBD-activated zeolite exhibited improved conversion and C2–C4 olefin selectivity due to the enhanced monomolecular cracking pathway induced by increased Brønsted acidity, while reducing aromatics and coke formation by suppressing side reactions. This paper presents an alternative method that is more energy-efficient, highly effective, and capable of regulating the metal coordination and acidity of ZSM-5 zeolite.
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高影响因子
Advanced Energy Materials
·
2025
·Vol. 15
·期 36
·e02595
·
IF 26
Xiang Ji,Yi Li,Yanlong Wang,Jian Jiang,Maowen Xu,Jianhui Zhu
Rechargeable Fe-ion batteries with overwhelming cost/environmental benign superiorities hold great promise in large-scale charge-storage applications. However, there is still a lack of competitive cathodes with prominent capacity and long-term cyclability. To overcome these constraints, a unique Fe 2+ /NH 4 + co-insertion strategy is proposed, enabling both doubled reversible capacity and cyclic life of Berlin green (FeHCF) cathodes. The Fe 2+ insertion proves to induce FeHCF lattice contractions, alter ligand environment/activation energies of low-spin Fe III, and hence boost the redox conversion depth, while NH 4 + co-insertions help to elevate the cathode capacities by utilizing Fe 2+ -unoccupied reaction sites. Besides, they generate hydrogen bonds between inserted NH 4 + ions and N atoms in FeHCF, capable of vastly strengthening the cathode's cyclic durability. Cathodes in such collaborative dual-cation electrolytes exhibit a remarkable capacity of 162 mAh g −1 (4 A g −1 ) and far prolonged operation lifespan (over 1000 cycles) when compared to single-cation cases. The assembled full cells demonstrate impressive energy densities up to 70.4 Wh kg −1 , and far superior capacity retention of 88% after all the cycling. This work may offer a simple/feasible, and effective route to render high-capacity and long-lasting cathodes for future/practical Fe-ion battery systems.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Changyuan Xu,Fengjiao Zhao,Yan Ding,Haizhen Song,Qun Wang,Hongming Yin
In this study, we propose a novel strategy to reduce Eu 2 O 3 to Eu 2+ in the 34.88P 2 O 5 -13.57B 2 O 3 -34.88ZnO-16.67KBr (PBZB) glass system by introducing (NH 4 ) 2 HPO 4 as a reducing phosphorus source. Photoluminescence (PL), photoluminescence excitation (PLE) spectral and UV–Vis absorption spectral analyses revealed that the emission peak at 325 nm excitation originates from the 4f 6 5d 1 → 4f 7 transition of Eu 2+ , confirming the reduction efficacy of (NH 4 ) 2 HPO 4 . Furthermore, incorporating 7.14 % Mn 2+ into PBZB glass and adjusting the concentration of Eu 2 O 3 demonstrated that Eu 2+ doping significantly enhances the red emission of Mn 2+ at 630 nm. Specifically, when the Eu 2 O 3 concentration is 0.12 mol%, the Mn 2+ emission intensity reaches its peak, with a 32.6 % increase in photoluminescence quantum yield (PLQY). However, further increasing the Eu 2 O 3 concentration leads to a decrease in Mn 2+ emission intensity and the appearance of Eu 3+ emission peaks, indicating a limited reduction capacity. Emission spectrum analysis showed a Eu 3+ reduction rate of 76.09 %. The effective energy transfer mechanism from Eu 2+ to Mn 2+ was verified through spectral overlap and decay curve analysis, with calculated energy transfer efficiency being similar to the PLQY increment. This study simplifies the Eu 3+ reduction process and provides a new method for optimizing Mn 2+ red emission in glass.
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高影响因子
ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Xiaoyu Zhao,Shuguang Shen,Jie Wang,Baojia Wang,Yongmei Liu,Jing Li
Using oxygen-rich medium- and low- temperature coal tar pitch enables intrinsic O-doping. • Low-dose (NH 4 ) 2 SO 4 achieves pre-oxidation of the raw materials. • Low-dose KOH activation produces uniform mesopores with 54% carbon yield. • A sequential low-dose strategy achieves synergistic pore-surface control. • MPC-700 achieves a specific capacitance of 367 F g −1 (at 5 A g −1 ). High-performance supercapacitors require electrode materials with suitable pore structures and abundant surface functional groups. Herein, a tandem oxidation-activation strategy is proposed to prepare coal-tar pitch-derived hierarchical porous carbon (MPC-700) rich in quinonyl groups. Low-dose (NH 4 ) 2 SO 4 pre-treatment significantly increases the oxygen content of the precursor, enhances the quinonyl group content in the porous carbon, and improves the pore structure, leading to a higher specific surface area. DFT calculations reveal that quinone-induced carbon vacancies reduce K⁺ adsorption energy, enhancing ion storage kinetics. Benefiting from the synergistic effect of hierarchical pores and quinone groups, MPC-700 achieves a specific capacitance of 367.0 F g −1 in 6 M KOH with excellent cycling stability. This work demonstrates a tandem coupling effect between low-dose modifiers and activators on oxygen-rich coal tar pitch, where pre-oxidation and pre-etching dictate the final pore structure and surface chemistry. This strategy offers a low-cost, green route for preparing porous carbon for energy storage applications. The porous carbon material, characterized by rich defect sites, a abundant quinonyl active functional groups, and a uniform porous structure, delivers outstanding electrochemical performance when employed as a supercapacitor electrode. Download: Download high-res image (437KB) Download: Download full-size image
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2026
·
IF 2.4
Ya-Li Wang,Rui-Zhi Cui,Hong-Bao Ren,Qiu-Ye Yang,Wu Li
This study addresses the unclear crystallization behavior of rubidium in chlorobromine coexisting brine systems through experimental and simulation approaches. First, the phase equilibrium data of the ternary system RbCl–RbBr–H2O at 298.15 K were determined using the isothermal dissolution equilibrium method, and the corresponding phase diagram was constructed. The solid phase was characterized by XRD and SEM-EDS, and solubility was theoretically calculated and validated using the Pitzer model. To further elucidate the solid-solution formation behavior of rubidium in chlorobromine coexisting brine systems at the microscopic level, molecular dynamics simulations were performed. Combined with the previously reported phase diagrams of MCl–MBr–H2O systems (M = Li+, Na+, K+, NH4+), the radial distribution functions, coordination numbers, and mean square displacements of different systems were systematically analyzed to examine the differences in ionic hydration structures and migration behavior. From macroscopic phase equilibria to microscopic ion dynamics, this study systematically clarifies the common patterns of formation of continuous solid solutions in chlorobromine coexisting brine systems.
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