ANALYTICAL LETTERS
·
2024
·
IF 1.6
Jingjing Gu,Chunyang Chen,Tingting Liu,Yanyan Li,Xuedong Wang
Here is reported effervescent reaction-enhanced switchable hydrophilic-hydrophobic solvent-based salting-out microextraction (ERSSM) with high-performance liquid chromatography with photodiode array detection (HPLC-PDA) for the preconcentration, extraction, and trace-level determination of polybrominated diphenyl ethers (PBDEs) in milk and water. The important variables were rigorously optimized to be 150 µL of hexanoic acid as the extraction solvent, 400 µL of Na2CO3 as the alkaline source, 350 µL of H2SO4 solution as the acid source, and NaCl as the salting-out agent. The optimized conditions provided a linear range from 0.2 to 50 µg L−1 with limits of detection and quantitation from 0.026 to 0.085 µg L−1 and 0.087 to 0.28 µg L−1 for six PBDEs. The intra-day and inter-day precision values were from 2.48% to 6.75%, and the fortified recoveries for PBDEs were between 78.06% and 103.07% in water and milk samples. The developed procedure avoids the use of a traditional organic disperser and mechanical mixing allowing the determination of PBDEs outdoors by synchronous extraction method and high efficiency for the analytes. These advantages suggest a high potential for the routine monitoring of PBDEs in liquid food and environmental samples.
研究领域:
环境科学
·
分析化学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Li Long,Xuechun Wang,Heyun Fu,Xiaolei Qu,Shourong Zheng,Zhaoyi Xu
Iron-based materials are effective for the reductive removal of the disinfection byproduct bromate in water, while the construction of highly stable and active Fe-based materials with wide pH adaptability remains greatly challenging. In this study, highly dispersed iron phosphide-decorated porous carbon (Fe2P(x)@P(z)NC-y) was prepared via the thermal hydrolysis of Fe@ZIF-8, followed by phosphorus doping (P-doping) and pyrolysis. The reduction performances of Fe2P(x)@P(z)NC-y for bromate reduction were evaluated. Characterization results showed that the Fe, P, and N elements were homogeneously distributed in the carbonaceous matrix. P-doping regulated the coordination environment of Fe atoms and enhanced the conductivity, porosity, and wettability of the carbonaceous matrix. As a result, Fe2P(x)@P(1.0)NC-950 exhibited enhanced reactivity and stability with an intrinsic reduction kinetic constant (kint) 1.53–1.85 times higher than Fe(x)@NC-950 without P-doping. Furthermore, Fe2P(0.125)@P(1.0)NC-950 displayed superior reduction efficiency and prominent stability with very low Fe leaching (4.53–22.98 μg L–1) in a wide pH range of 4.0–10.0. The used Fe2P(0.125)@P(1.0)NC-950 could be regenerated by phosphating, and the regenerated Fe2P(0.125)@P(1.0)NC-950 maintained 85% of its primary reduction activity after five reuse cycles. The study clearly demonstrates that Fe2P-decorated porous carbon can be applied as a robust and stable Fe-based material in aqueous bromate reduction.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
STAR Protocols
·
2024
·
IF 1.3
Zengguang Sui,Yunren Sui,Zhixiong Ding,Haosheng Lin,Fuxiang Li,Wei Wu
Summary Passive thermal management with zero-energy consumption and high compactness has drawn increasing attention. Here, we present a protocol to develop a hygroscopic salt-loaded heat sink with a moisture-permeable membrane encapsulation technique for electronics cooling. We describe steps for preparing lithium bromide solution and heat sink with anti-corrosion graphene coating. We then detail procedures for preparing the hygroscopic salt-loaded membrane-encapsulated heat sinks (HSMHSs). The produced low-cost HSMHS exhibits remarkably high thermal management performance without the risks of leakage and corrosion. For complete details on the use and execution of this protocol, please refer to Sui et al. 1
研究领域:
材料科学
·
热能工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Yuzhu Qian,Qing Zhang,Lijuan Chen,Yaoyong Dong,Ting Song,Yong Pei,Xianyou Wang,Xiongwei Wu,Xuejun Zheng,Wenyuan He,Bei Long
Developing insertion-type anodes is essential for designing high-performance “rocking chair” zinc-ion batteries. BiOCl shows great potential as an insertion-type anode material for Zn 2+ storage due to its high specific capacity and unique layered structure. However, the development of BiOCl has been significantly hampered by its poor stability and kinetics during cycling. In this study, Br-doped and carbon-coated BiOCl ultrathin nanosheets (Br-BiOCl@NC) are synthesized as high-performance anodes. The ultrathin nanosheet morphology facilitates Zn 2+ /H + transfer and the Br doping reduces the Zn 2+ /H + diffusion barrier. Additionally, the carbon coating enhances the electronic transfer. Furthermore, an insertion-conversion mechanism involving H + and Zn 2+ storage is revealed by ex-situ tests. Therefore, Br-BiOCl@NC exhibits a high discharge capacity of 174 mA h/g at 500 mA/g without capacity degradation after 1000 cycles. The Br-BiOCl@NC//MnO 2 full cell presents a discharge capacity of ≈ 120 mA h/g at 200 mA/g. This work offers valuable insights for the design of high-performance insertion-type anode materials in zinc-ion batteries.
研究领域:
材料科学
·
电化学
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产品关联
DOI
PubMed
高影响因子
WATER RESEARCH
·
2025
·
IF 12.4
Yan Cai,Xiaoci Li,Peizeng Yang,Jing Chen,Junhe Lu,Jean-Marc Chovelon,Yuefei Ji
As one of benzophenone-derived drugs, benzbromarone (BBM) has been widely used to reduce blood uric acid, treat gout, and gouty arthritis. Understanding the transformation and fate of BBM in natural and engineered systems is critical for its ecological risk assessment. In this study, we systematically investigated the photochemical behavior of BBM in aqueous solutions under laboratory UV 254 irradiation. UV-vis spectra show that an aqueous solution of BBM is capable of absorbing UV photons at 200 - 400 nm. Spectroscopic titration indicates that BBM with a p K a value of 4.83 ± 0.17 is present mainly as the phenolate form under circumneutral conditions. BBM undergoes rapid direct photolysis when exposed to UV 254 irradiation and the quantum yields were determined to be 0.0105 and 0.0196 mol E −1 for phenol and phenolate forms, respectively. The heavy atom effect of bromine and spin-orbit coupling effect of aromatic ketone make dibromophenol and carbonyl moieties the critical chromophores accounting for the high photoreactivity of BBM. Laser flash photolysis and electron paramagnetic resonance studies suggest that the photolysis of BBM is initiated by ultrafast photodebromination and Norrish I cleavage. The high yield of bromide determined by ion chromatograph highlights the importance of photodebromination. Due to the light screening effect of wastewater components, the photolysis of BBM in hospital wastewater is inhibited. Photo-induced modification of the dibromophenol moiety of BBM likely generates photoproducts showing toxicity to luminescent bacteria. Overall, our results reveal that photochemical reaction under UV irradiation plays an important role in the attenuation of BBM in engineered water.
研究领域:
环境科学
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药理学
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毒理学
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DOI
PubMed
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2017
·
IF 4.217
Qian Wen Cao,Yi Fan Zheng,Xu Chun Song
The efficient visible-light-driven AgIO 3 /AgBr photocatalyst was successfully synthesized by an in-situ anion-exchange method at room temperature. The scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV–vis diffuse reflection spectroscopy (DRS) were used to characterize the obtained samples. The photocatalytic activities of the as-prepared heterojunctions were estimated by decomposing the organic dye RhB under visible-light irradiation ( λ > 420 nm). Compared with pure AgBr and AgIO 3 , the AgIO 3 /AgBr compounds showed dramatically improved visible-light photocatalytic activity. Besides, the results also revealed that 20% AgIO 3 /AgBr exhibited the best photocatalytic activity, which could decompose the RhB completely in 24 min. The enhanced photocatalytic activity of the composites could be ascribed to the high separation rate of the photoinduced electron–hole pairs in the heterojunction structure. Moreover, the radical trap experiments were also carried out which confirmed that h + played the major role in RhB photodegradation . The possible mechanism of RhB degradation on the AgIO 3 /AgBr composite was also discussed according to the results of the experiments and the performance of the obtained photocatalysts.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2020
·Vol. 44
·期 5
·3626-3639
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IF 3.741
Biao Liu,Xuelai Zhang,Jun Ji,Weisan Hua,Fa Mao
Summary In order to find phase change materials that can be better applied in the field of solar collectors, the phase change heat storage properties of urea (U) and ammonium bromide (AB) were studied. The eutectic ratio of UAB was found by the Edison method, and different additives were added to UAB by dipping and mixing. The structure and property of the composites were characterized by X-ray powder diffraction (XRD), scanning electron microscope (SEM), differential scanning calorimetry (DSC), and TG/TGA, respectively. The results showed that the eutectic ratio of UAB was 6:3; it was weakly acidic after melting not layered. When 6-wt% EG and 1-wt% nanometer titanium dioxide (TiO 2 ) were added, the thermal conductivity of the material increased by 3.62 times; the thermal diffusivity was increased by 6.77 times. When the mass fraction of EG is between 1% and 6%, the larger the mass fraction of EG, the greater the thermal conductivity of the material. After 1000 cycles, the composite material performance was stable; at the same time, the used materials can be used as fertilizers to solve the problem of material pollution, which indicated that the prepared UAB/TiO2/EG composite PCMs had great application prospect in the field of solar collectors.
研究领域:
材料科学
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能源工程
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DOI
高影响因子
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
·
2022
·Vol. 37
·期 6
·065011
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IF 2.048
Xiaoyu Wang,Nasir Ali,Gang Bi,Huizhen Wu
In this work, lead-free double perovskite Cs2BiAgBr6 film is fabricated and employed into resistive switching (RS) memory device with a metal/insulator/metal structure. The RS performances of the prepared device are examined both experimentally and theoretically. High-quality Cs2BiAgBr6 film is fabricated via a post-vacuum treatment and characterized systematically. In the prepared memory device, bipolar RS is observed with a high ON/OFF ratio, and the retention and endurance performances are measured. First-principles calculations based on the density functional theory reveal that the bromide vacancies (VBr) in Cs2BiAgBr6 render it metallic characteristics. Therefore, we propose that the migration of VBr under electrical fields formed and ruptured the conductive filament, leading to the RS behaviors of memory device.
研究领域:
材料科学
·
计算物理
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DOI
高影响因子
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
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2015
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IF 2.131
Yuancai Lv,Lianghao Li,Yuancai Chen,Zhenghua Tang,Yongyou Hu
Polybrominated diphenyl ethers (PBDEs) are emerging persistent organic pollutants and the degradation of PBDEs is still a tremendous challenge owing to their extreme persistence and recalcitrance. In this study, Pseudomonas putida was employed for bioremediation of four PBDE congeners (BDE47, 15, 3 and diphenyl ether (DE)) with an initial concentration of 2 mg/L and the cometabolism of PBDEs was illustrated via kinetics analysis and metabolic mechanism. The biodegradation kinetics analysis suggested that PBDEs was inversely proportional to the number of bromine substituted on diphenyl ether. Both glucose (24 mg/L) and biphenyl (10 mg/L) played a positive role in promoting the biodegradation of PBDEs. The growth kinetics analysis indicated that glucose had uncompetitive inhibition on PBDEs consumption while both competitive and uncompetitive inhibition existed in biphenyl-PBDEs binary substrate system. Furthermore, the intermediates were identified by GC–MS and the main tentative degradation pathways were proposed. The angular dioxygenation was the main pathway for PBDEs degradation, while lateral dioxygenation could be induced when biphenyl was added.
研究领域:
环境科学
·
微生物学
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DOI
高影响因子
Analytical Methods
·
2016
·Vol. 8
·期 17
·3578-3586
·
IF 1.915
Haijing Du,Yanxin Chu,Hong Yang,Kang Zhao,Jianguo Li,Pei She,Xiang Zhang,Anping Deng
Brombuterol, a new β-adrenergic agonist which can enhance the lean meat-to-fat ratio, is forbidden as an additive in animal feeds for livestock production due to its adverse effects on consumers. In this study, a highly sensitive and specific competitive enzyme-linked immunosorbent assay (ELISA) for the detection of brombuterol in tissue and feed samples was developed. The immunogen and coating antigen were prepared by directly linking brombuterol to carrier proteins using the diazobenzidine method. The antisera against brombuterol were obtained from immunized rabbits. The IC50 and limit of detection (LOD) values of the superior ELISA were 0.165 ng mL−1 and 0.007 ng mL−1, respectively. The cross-reactivity (CR) values of ELISA with clenbuterol, terbutaline and cimbuterol were less than 6.2%; there was no CR of ELISA with nine other compounds. To investigate the accuracy and precision of the assay, liver, meat and feed samples were spiked with brombuterol at different concentrations and analyzed by ELISA. Acceptable recovery rates of 91.9–115.4% and intra-assay coefficients of variation of 1.5–9.5% (n = 3) were achieved. The ELISA was also validated by HPLC. As revealed, both methods were highly correlated (R2 = 0.9927–0.9994, n = 6). The proposed ELISA was proven to be a feasible method for quantitative analysis of brombuterol in tissue and feed samples.
研究领域:
食品安全
·
免疫学
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产品关联
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2022
·Vol. 48
·期 3
·1095-1109
·
IF 3.134
Deng Renjie,Zeng Manlin,Tian Yao
A novel heterogeneous catalytic system was developed for the preparation of para -nitrobromobenzene ( p -NBr) with nitrogen dioxide (NO 2 ) as nitrating agent in the presence of oxygen (O 2 ). By applying Hβ zeolite as the catalyst, p -NBr can be obtained with high conversion (85.7%) and selectivity (91.7%). In addition, it can be recycled at least five times without a significant decrease in catalytic activity, which demonstrates its high efficiency, good stability and regenerability. Meanwhile, DFT study explained the regioselectivity for the nitronium (NO 2 + ) nitration via electrophilic process, which support the experimental conclusion. Graphical abstract
研究领域:
催化
·
有机化学
·
理论化学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Ying Xu,Shuili Yu,Zhiqiang Fan,Cong Huang,Lei Li,Rui Liu,Zheng Xu
Zero-valent bismuth (Bi) nanospheres with a hollow structure were synthesized via a polyvinylpyrrolidone (PVP)-assisted solvothermal method and applied as efficient photocatalysts for the sacrificial-agent-free photoreduction of bromate (BrO 3 - ) under ultraviolet (UV) irradiation. The optimized Bi-0.6 catalyst exhibited a narrowed band gap and enhanced charge separation efficiency, achieving 99.5 % BrO 3 - removal within 30 min at neutral pH. Comprehensive photoelectrochemical analysis revealed that the in-situ self-oxidation of Bi 0 to Bi 3+ served as an intrinsic hole scavenging pathway, suppressing charge recombination and sustaining electron availability without needing external reductants. In addition to the rapid reduction of BrO 3 - , a significant decrease in total bromine concentration was observed, which is attributed to the incorporation of bromide (Br - ) into Bi 24 O 31 Br 10 crystalline phases, effectively mitigating the risk of secondary disinfection byproducts. The Bi-0.6 nanospheres also exhibited excellent stability and recyclability over multiple reaction cycles and retained high activity in real water (RW) matrices containing organic matter and competing anions. These results highlight the dual functionality of zero-valent Bi nanospheres in enabling efficient pollutant removal and total bromine mitigation through a self-regulating photocatalytic process. This work presents a sustainable and practical strategy for BrO 3 - remediation and provides insights into the design of environmentally compatible photocatalytic systems for safe water treatment applications.
研究领域:
环境科学
·
纳米技术
·
材料科学
·
水处理技术
·
光催化
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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）