Journal of Water Process Engineering
·
2025
·
IF 6.7
Ying Xu,Shuili Yu,Zhiqiang Fan,Xingli Ji,Cong Huang,Zheng Xu,Rui Liu,Chao Jiang
Bromate (BrO 3 − ), a carcinogenic and regulated disinfection by-product, poses a persistent challenge to drinking water safety due to its high solubility and chemical stability. In this work, a noble-metal-free Fe 3 O 4 /TiO 2 /Bi photocatalyst was successfully prepared and subsequently applied for BrO 3 − reduction under ultraviolet light. The ternary composite design enables cooperative functionality among the components, where Fe 3 O 4 facilitates charge transfer and magnetic separability, Bi 0 acts as a hole scavenger, and TiO 2 serves as the primary photoactive material. Characterization results confirmed the successful formation of the heterostructure with enhanced charge separation properties. The composite containing 5 wt% Bi exhibited the highest activity, achieving 99 % BrO 3 − removal within 25 min at pH 7.0, with a pseudo-first-order rate constant of 0.185 min −1 , which is 11.8 times that of pure TiO 2 . The enhanced photocatalytic performance is ascribed to the synergistic effect between Bi, Fe 3 O 4 and TiO 2 . Bi 0 nanoparticles functioned as hole acceptors to suppress recombination, while Fe 3 O 4 facilitated electron transport and provided magnetic separability. The photocatalyst retained high activity over five consecutive cycles with negligible metal leaching and performance loss. In addition, its effectiveness was verified in tap water containing typical inorganic ions and dissolved organic matter, demonstrating moderate inhibition but maintaining BrO 3 − reduction capability. This study provides a cost-effective, magnetically recoverable, and noble-metal-free photocatalyst with improved charge separation efficiency and recovery feasibility, offering practical potential for BrO 3 − mitigation in drinking water treatment.
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CHEMICAL PAPERS
·
2025
·
IF 2.5
Zhao Jinwen,Wang Le,Liu Xiaolan,Zhu Yanqin,Yin Qinhong
Nanozymes have been valuable tools in colorimetric analysis due to their ease of production, long-term stability, and adaptable enzymatic activity, enabling them to induce color changes in substrates. This study presents a straightforward enzyme-based colorimetric sensor for morphine ( MOR ) detection. The sensor utilized the laccase-like activity of a self-synthesized Cu, Bi-phosphotungstic acid ( Cu, Bi-PTs ) nanozyme, which was loaded with phosphotungstic acid, copper, and bismuth through a one-pot microwave method. This nanozyme was capable of catalyzing the coupling reaction of 2,4-dichlorophenol ( 2,4-DP ) and 4-aminoantipyrine ( 4-AP ), leading to the conversion of colorless phenolic compounds into red-colored products. The method demonstrated a detection limit of 1.88 μg/mL for MOR and a linear dynamic range from 3.333 to 400 μg/mL. The calibration curve, given by the equation y = 0.0015x + 0.4081, exhibited excellent linearity (R 2 = 0.9914), confirming the method's reliability for quantitative analysis. The developed colorimetric method was successfully applied to real samples, showing relative standard deviations (RSD) between 1.4 and 4.3% for MOR detection. These results demonstrated that the method was sensitive, cost-effective, and rapid, making it suitable for the efficient determination of MOR .
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JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Wenhui Tu,Zewei Chen,Yuanpeng Cao,Jianguo Duan,Jingjing He,Runlin Li,Peng Dong,Xianshu Wang,Yingjie Zhang,Ding Wang
Olivine-structured LiMnPO 4 -based cathodes have generated enormous development prospects due to their high energy density , good structural stability , and low cost. However, their scale of application is limited by high electronic and ionic insulativity. In this study, we designed and synthesized a bi-functional interfacial modified composite, 0.9LiMnPO 4 @0.1LiFePO 4 /C ( [email protected] /C ), using mechanochemical activation-assisted hydrothermal technology. The innovative Li-storage structure consists of a high-energy density LiMnPO 4 (LMP) core, a uniformly coated LiFePO 4 (LFP) layer with improved ionic conductivity as the secondary outer shell, and an in-situ coated carbon film with high conductivity as the outermost functional skin. As anticipated, the [email protected] /C composite exhibits outstanding Li-storage properties, demonstrating discharge capacities as high as 157.1 mAh g −1 and 146.7 mAh g −1 at 0.1 C and 1 C rates, respectively. Moreover, it exhibits an ultrahigh capacity retention of 92.5 % after 500 charge and discharge cycles.
研究领域:
材料科学
·
电化学
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2019
·
IF 4.029
Bo-Wei Xun,Yu-Cheng Tang,Jian-Yin Chen,Bo-Ping Zhang
We reported a facile analysis and reduction of oxygen vacancy ( V O • • ) in 0.7Bi(Fe 1- x Sc x )O 3 -0.3BaTiO 3 (0≤ x ≤0.08) ceramics. The leakage current mechanism was investigated intensively. Our results indicated that oxygen vacancies are the main cause for the high conductivity in BF-BT ceramics, and their concentration was quantitatively estimated from the Bi 3+ content and the average oxidation state of iron. The V O • • concentration was effectively suppressed and the insulation resistance was enhanced by almost two orders of magnitude after doping 2%mol Sc 3+ . The enhanced insulation resistance contributed to excellent piezoelectric properties with d 33 = 165 pC/N, T C = 505 °C, and k p = 26%. The proposed analysis method used to quantify the V O • • concentration provides valuable indications to reduce the leakage current density and improve the piezoelectric properties of BF-BT based ceramic.
研究领域:
材料科学
·
物理学
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高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Sihan Ma,Xian Luo,Guang Ran,Zonglang Zhou,Jun Xie,Yipeng Li,Xingyong Li,Jianghua Yan,Wangyu Cai,Lin Wang
The release of pollutants from bacterial pathogens in air or water, which causes a serious threat to human health and well-being. Traditional antibiotics have exhibited insufficient ability in combating bacteria owing to the emergence of drug-resistant bacteria. Hence, effective antibacterial candidates urgently need to be explored as an alternative for overcoming the antibiotic barrier. It is highly necessary to find an effective stable disinfection system with the nature of environmental-friendly, high activity and stability, convenient synthesis procedure, low energy, cleaner, and low economic consumption. Considering these aspects, optical strategy and chemical treatment bring convenience and advantages in bacterial inactivation. In this work, the bimetallic Cu–Bi alloy was explored using a simple one-pot solvothermal strategy. On the one hand, the bimetallic structure can prevent copper from oxidation to decrease potential secondary pollution activity caused by excessive release of copper ions , and maintain copper's highly biological activity . On the other hand, the as-prepared Cu–Bi alloy was employed to perform antibacterial applications. Hyperthermia is driven by near-infrared light and the introduction of ROS from Cu Fenton-like reaction that can effectively promote the death of bacteria, and perform a better antibacterial ability than that of single Ag + or Cu 2+ release, resulting in the significant growth inhibition of E. coli . Overall, the combination of the multiple disinfection ability of the Cu–Bi alloy, involving highly efficient ROS generation and effective photothermal performance, not only shows the potential in fighting against pathogenic bacteria but also provides an important insight for the exploration of antibacterial platforms based on the bimetallic materials.
研究领域:
材料科学
·
微生物学
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JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
·
2016
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IF 3.958
Da Yang,Huan Liu,Dong-Liang Wang,Yong Lu,Xiao-Li Zhao,Ye Liu
The complex of Au-L1 containing imidazolyl ring and the phosphine-ligated-Au moiety was synthesized and applied as the efficient bi-functional catalyst for the one-pot sequential condensation/annulation reaction for the synthesis of pyridine derivatives. It was found that, as for Au-L1 , the involved imidazolyl group acted as a Lewis base to catalyze the condensation of carbonyl compounds with propargylamine to form the imino intermediate, and the involved Au + -complex species with alkynophilicity corresponded to the subsequent activation of imino-tailed alkynyl to afford dehydropyridine intermediate. The latter proceeded auto-oxidation reaction to afford the pyridine derivatives. The observed sequential catalysis over Au-L1 proved more efficient than that over the mechanical mixtures of the Au-complex ( Au-L2 ) and N -methylimidazole, because the free N -methylimidazole as an N-containing donor competed with the alkyne substrate to coordinate to Au-center. Moreover, Au-L1 exhibited good generality to a wide range of the substrates for the synthesis of 2,3-fused pyridine derivatives and 2-aryl(heteroaryl)-substituted pyridines.
研究领域:
有机化学
·
催化化学
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CARBON
·
2023
·
IF 10.9
Qingyuan Zhao,Wenjie Zhao,Yinghao Wu
The limited interfacial combination between CF and polymer matrix caused by the chemical inertness of CF surface greatly restricts the protective capability of carbon fiber reinforced polymer coatings (CFRPCs), which could not effectively resist the impact of external forces, especially in the severe and complicated ocean environment (like deep-sea area and splash zone). Hence, it is the crux to enhance the interface compatibility and interface strength between fiber and resin. Based on the reliable compatibility between imidazole and epoxy as well as the corrosion inhibition effects of cerium-based compounds, a kind of bi-functional metal-organic framework (MOF) called the cerium-imidazole framework (Ce-MI) was constructed on the CFs surface via in-situ growth method to improve the interface compatibility and interface strength of fiber and resin and further increase protective performance of epoxy (EP) coating under the simulated deep-sea area and splash zone . After 168 h immersion under alternating hydrostatic pressure, CF@Ce-MI/EP coating displayed impressive impermeability and anti-corrosion performance, and the interfaces of fiber/epoxy adhered firmly. After the erosion wear test, the volume loss and mass loss of CF@Ce-MI/EP were decreased by 23.77% and 14.80%, respectively, compared with CF/EP. Finally, we discussed the protective mechanism of composite coating to reveal the different processes of interface failure caused by the high pressure and the impact of solid particles , respectively.
研究领域:
材料科学
·
化学工程
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Shanshan Ding,Danjun Mao,Shaogui Yang,Fei Wang,Lingjun Meng,Mengshu Han,Huan He,Cheng Sun,Bin Xu
The novel boron nitride coupled Bi-rich Bi 4 O 5 Br 2 layered microspheres (h-BN/Bi 4 O 5 Br 2 -LMs) were successfully synthesized via a facile ionic liquid-in-water (IL/W) microemulsion-mediated route. The physical, chemical and optical properties of these heterojunction photocatalysts were thoroughly characterized with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectrometry (EDS), transmission electron microscopy (TEM) and UV–vis diffuse reflection spectroscopy (DRS). Their photocatalytic activities were primarily evaluated by degradation of 4- tert -butylphenol (PTBP), which found 1.0 wt% h-BN/Bi 4 O 5 Br 2 -LMs to be the best one. The photocurrent experiments showed that the photocurrent density of 1.0 wt% h-BN/Bi 4 O 5 Br 2 -LMs was four times higher than that of pure Bi 4 O 5 Br 2 -LMs due to enhanced charge transfer ability of the former. It revealed that the addition of h-BN was in favor of suppressing the photoinduced electron-hole pair recombination of Bi 4 O 5 Br 2 -LMs, so as to improve the photocatalytic activity of the composite. O 2 − and h + were proved to be the main reactive species in the photocatalytic process by scavenger experiments and electron paramagnetic resonance (EPR) spectra. In addition, the photocatalytic mechanism of h-BN/Bi 4 O 5 Br 2 -LMs was further elaborated in this work. The probable degradation products were identified by GC–MS. The proposed conjugated addition and oxidation reactions were described to be the main pathways by combining the frontier electron density calculation and GC–MS results.
研究领域:
材料科学
·
环境科学
·
化学工程
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JOURNAL OF ELECTRONIC MATERIALS
·
2020
·Vol. 49
·期 4
·2608-2616
·
IF 1.774
Chen Gang,Ji Cong,Fan Tao,Li Jiahua,Fu Chunlin,Cai Wei,Gao Rongli,Wang Zhenhua,Deng Xiaoling,Fan Peigeng
The (1 − x ) Bi (Fe 0.9 Al 0.05 Yb 0.05 ) O 3 – x BaTiO 3 (BFAYO- x BTO) ceramics were synthesized by microwave sintering (MWS) and conventional sintering (CS) methods. The crystal structure, surface morphology, dielectric and ferroelectric properties were investigated. XRD patterns show that BTO tetragonal and BFO rhombohedral phases coexist in both MWS and CS samples, and that the diffraction peaks of MWS samples shift to lower angles due to the larger ionic radius of Ba 2+ compared with Bi 3+ . The lattice constant of BFAYO- x BTO ceramics increases with the increase of BTO content. It was found that the average grain size of the MWS ceramic is much smaller than that of the CS ceramic. Dielectric measurements reveal that the dielectric loss and dielectric constant increase with BTO content increasing. The introduction of BTO into BFAYO-based ceramic contribute to the enhancement of the dielectric relaxation behavior. The P – E hysteresis loops demonstrate that the remnant polarization ( P r ) and the coercive field ( E C ) of the MWS samples are smaller than those of the CS samples. P r and E C first increase, then decrease and then increase again with the increase of BTO content. The maximum and minimum values of the remnant polarization were obtained at x = 0.25 and 0.3, respectively.
研究领域:
材料科学
·
电子工程
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ACS Applied Materials & Interfaces
·
2021
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IF 9.229
Xiangyang Zhang,Xiaolin Ye,Shaopei Huang,Xuelong Zhou
Elaborate nanoarchitectured solid/liquid interface design of felt electrodes is arguably the most effective pathway to promote the pore-level transport-reaction processes of redox flow batteries. Herein, we conceive a new type of nanocatalytic-layer-architectured graphite felt via introducing the vertically standing carbon nanosheet-confined Bi nanodots onto carbon fiber surfaces. The vertically standing carbon nanosheets construct a nanoporous layer with straight channels for vanadium ion shuttling, where highly dispersed Bi nanodots are stiffly confined to afford abundant active sites. The vanadium redox flow battery utilizing the rationally designed electrodes achieves an energy efficiency of 89% at 150 mA cm–2, which is substantially higher than those of raw felt (61%) and oxidized felt (77%). Also, the battery with the present electrode maintains an energy efficiency of over 73% even at 400 mA cm–2, showing the excellent capability of withstanding fast charging and discharging. The multiphysics simulation shows that the vertically standing architecture optimizes the vanadium ion accessibility to the solid/liquid interfaces and thus maximizes the catalytic activity. Moreover, the battery can sustain more than 1000 cycles without obvious efficiency decay, confirming the superb stability of the present electrode. These encouraging results indicate that engineering vertically standing structures with tailored compositions may open up new avenues for advancing the flow battery technology.
研究领域:
材料科学
·
电化学
·
储能技术
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ACS Catalysis
·
2026
·Vol. 16
·期 15
·14804-14817
·
IF 13.6
Liu Hongjing,Ren Shan,Li Xiaodi,Liu Manyi,Chen Peng,He Chi,Bai Bofeng,Chai Shouning,Dong Fan
Efficient photocatalytic mitigation of nitrogen oxides (NO x ) under ambient conditions remains challenging due to limited charge-carrier separation and poor selectivity in regulating reactive oxygen species (ROS), which often results in undesirable NO 2 accumulation. In this study, bismuth molybdate (Bi 2 MoO 6 ) was employed as a model photocatalyst, on which dual active sites composed of plasmonic metallic Bi nanoparticles and ultrasmall spin-polarized NiO were in situ constructed. Plasmonic Bi enhances visible-light absorption and hot-electron generation via localized surface plasmon resonance, while NiO establishes a spin-selective electron-transfer pathway that facilitates efficient O 2 activation. This cooperative interface suppresses exciton recombination and promotes a superoxide (·O 2 – )-dominated oxidation pathway. Consequently, the optimized Bi-NiO@BMO achieves 77.0% NO removal, 76.7% nitrate selectivity, and minimal NO 2 accumulation (<11 ppb), representing a 9.7-fold enhancement compared with pristine Bi 2 MoO 6 . In practical applications, the PTFE-assisted loading technique allows the material to be fixed onto ceramic foam, achieving an 84% NO removal efficiency and further enhancing photocatalytic performance. Spectroscopic analyses combined with density functional theory (DFT) calculations confirm that the plasmon–spin interaction lowers the free-energy barriers for ·O 2 – formation and deep NO oxidation. This work provides a mechanistic insight into plasmon-spin-regulated ROS generation and offers a rational design strategy of highly selective photocatalysts for environmental NO x abatement.
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Nature Communications
·
2026
·Vol. 17
·期 1
·1699
·
IF 15.7
Sui Huiting,Lou Wenhua,Xiao Shibing,He Jia,Wu Fuling,Liu Ying,Wei Jianbiao,Lu Haijie,Sun Huajun,Ma Xiaoguang,Zhang Shujun
Defect microstructures, particularly dislocations, are pivotal in determining the functional properties of ferroelectric thin films. While their density is routinely considered, the critical role of their spatial configuration has remained largely unexplored and difficult to control. Here, we develop a controlled self-assembly strategy for dislocations in Bi(Fe,Mn)O 3 thin films on Ni-Cr that directly addresses this challenge. By employing a LaNiO 3 buffer layer, we template a discontinuous-columnar grain structure and guide the self-assembly of edge dislocations along grain boundaries in a topologically-protected configuration. The resulting ordered microstructure promotes a more uniform strain field and more coherent FeO 6 octahedral tilting, significantly enhances polarization homogeneity, leading to a lower domain-switching barrier and a more uniform domain pinning effect. Consequently, the BFMO thin film exhibits dramatically superior aging stability after 60 days at 60 °C, exhibiting far smaller reductions in remanent polarization (~20%) and coercive field (~35%) compared to the BFMO thin film grown directly on Ni-Cr. These findings establish a defect engineering paradigm wherein the deliberate dislocation rearrangement is leveraged to unlock superior ferroelectric performance.
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