ACS Applied Materials & Interfaces
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2018
·
IF 8.097
Sisi Yang,Zhenglin Li,Yuanlin Wang,Xuelei Fan,Zhaohua Miao,Ying Hu,Zhuo Li,Ye Sun,Flemming Besenbacher,Miao Yu
High-performance theranostic nanoagents, which integrate multimodal imaging and photothermal therapy for clinical anticancer treatment, are highly desired. Herein, we report the synthesis and bioapplication of a multifunctional theranostic nanoagent based on polyethylene glycol (PEG)-modified polypyrrole (PPy)-coated bismuth (Bi) nanohybrids (referred to as Bi@PPy-PEG NHs) for X-ray computed tomography/photoacoustic (CT/PA) dual-modal imaging and photothermal therapy (PTT). The obtained Bi@PPy-PEG NHs have a distinct core–shell structure with the metallic Bi nanoparticle as the inner core and the PPy-PEG layer as the shell. The Bi@PPy-PEG NHs show excellent physiological stability and compatibility, without noticeable cytotoxicity. Importantly, the NHs exhibit strong NIR absorbance and remarkable photothermal conversion capability and conversion stability, with the photothermal conversion efficiency as high as ∼46.3%. Thanks to the strong PTT effect, highly effective photothermal ablation on cancer cells has been achieved both in vitro and in vivo. Furthermore, a high-contrast in vitro and in vivo CT/PA dual-modal imaging has been realized, showing great potential to provide comprehensive diagnosis information for antitumor treatment. In particular, the CT enhancement efficiency of the NHs is of ∼14.4 HU mM–1, which is ∼3.7-fold that of clinically used iohexol. Therefore, our work highlights the potential of using such core–shell Bi@PPy-PEG NHs as a versatile theranostic nanoplatform for cancer imaging and therapy.
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Journal of the Iranian Chemical Society
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2019
·Vol. 16
·期 12
·2743-2754
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IF 1.742
Huang Yunfang,Xu Hui,Luo Dan,Guo Qiyao,Zhao Yuezhu,Fang Yu,Wei Yuelin,Fan Leqing,Wu Jihuai
In this work, a series of flower-like Bi/BiOCl x Br (1− x ) heterojunction photocatalysts have been developed. Bi nanoparticles were grown on the BiOCl x Br (1− x ) nanosheets via an in situ chemical reduction with the assistance of cetyltrimethylammonium chloride and cetyltrimethylammonium bromide aqueous solution. The in situ growth of Bi nanoparticles on the BiOCl x Br (1− x ) nanosheets could not only give rise to the optical absorption in the visible region, but also promote the photocatalytic performance of BiOCl x Br (1− x ) . Bi/BiOCl 0.8 Br 0.2 exhibited the highest photocatalytic performance, which could completely degrade RhB in 12 min under the UV light irradiation and 6 min under visible light irradiation, respectively. Moreover, holes and superoxide radicals were verified to be the primarily active species in the photocatalytic process.
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Scientific Reports
·
2017
·Vol. 7
·期 1
·1-8
·
IF 4.259
Zhao Jie,Zou Xilai,Sun Peng,Cui Guofeng
A three-dimensional bi-continuous nanoporous gold (NPG)/nickel foam is developed though the electrodeposition of a gold–tin alloy on Ni foam and subsequent chemical dealloying of tin. The newly-designed 3D metal structure is used to anchor MnO 2 nanosheets for high-performance supercapacitors. The formed ternary composite electrodes exhibit significantly-enhanced capacitance performance, rate capability, and excellent cycling stability. A specific capacitance of 442 Fg −1 is achieved at a scan rate of 5 mV s −1 and a relatively high mass loading of 865 μg cm −2 . After 2500 cycles, only a 1% decay is found at a scan rate of 50 mV s −1 . A high power density of 3513 W kg −1 and an energy density of 25.73 Wh kg −1 are realized for potential energy storage devices. The results demonstrate that the NPG/nickel foam hybrid structure significantly improves the dispersibility of MnO 2 and makes it promising for practical energy storage applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Wanjie Xu,Yuanzhi Chen,Liubin Shi,Laisen Wang,Dong-Liang Peng
Binary superparticles formed by self-assembling two different types of nanoparticles may utilize the synergistic interactions and create advanced multifunctional materials. Bi-magnetic superparticles with a core–shell structure have unique properties due to their specific spatial configurations. Herein, we built Mn 3 O 4 @Ni core–shell binary superparticles via an emulsion self-assembly technique. The superparticles are generated with a spherical morphology, and have a typical average size of about 240 nm. By altering the ratio of the two magnetic nanoparticles , the thickness of Ni shells can be adjusted. Oleic acid ligands are crucial for the formation of core–shell structure. Magnetic analysis suggests that core–shell superparticles display dual-phase magnetic interactions, contrasting with the single-phase magnetic behaviors of commonly core–shell magnetic nanoparticles . The calculation on the effective magnetic anisotropy constants indicates that the presence of Ni shell layers reduces the dipole interactions among the Mn 3 O 4 core particles. Due to the presence of Ni nanoparticle shells, the blocking temperature of Mn 3 O 4 is reduced, while the Curie temperature of Mn 3 O 4 is independent on Ni content. Tunable magnetic properties can be achieved by modulating the Ni nanoparticle shell thickness. This study offers insights for the development of core–shell superparticles with varied magnetic characteristics.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Meng Xu,Zhiyou Tan,Yilong Tian,Feng Gong,Kebing Yi,Zhike He,Xinghu Ji
Developing anode materials significantly enhances the desalination performance of hybrid capacitive deionization (HCDI). Bismuth exhibits high selectivity for chloride ion removal. However, the sluggish kinetics and poor cycling stability of bismuth present considerable challenges for its application in high-capacitance deionization. In this study, we successfully prepared a binder-free Bi@MXene film electrode for chloride storage by employing an electrostatic self-assembly strategy to anchor Bi nanospheres into MXene layers. The bismuth nanospheres, as the pillars of MXene network, improve the self-stacking problem of Ti 3 C 2 T X layers. And MXene layers effectively mitigate the volume expansion of bismuth nanospheres through the spatial confinement effect. Benefiting from three-dimentional sandwich structure of Bi@MXene film, the HCDI system exhibits outstanding salt adsorption capacity (113.4 mg·g −1 ), excellent adsorption rate (4.2 mg·g −1 ·min −1 ) and a good desalination capacity retention of 84.6 % following 50 cycles at 100 mA·g −1 . The development of this composite material provides insights for the design of efficient and stable chloride storage electrodes.
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International Journal of Electrochemical Science
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2024
·
IF 1.3
Lin Yang,Yijing Ai,Shihui Xu,Lisi Wang,Xiaoping Zhang,Wei Sun
In this paper, Bismuth/poly(3,4-ethylenedioxythiophene) (Bi/PEDOT) modified electrochemical modified electrodes were prepared by electrochemical deposition method, and the electrochemical performance of the electrode was investigated using cyclic voltammetry under the optimal experimental conditions. The PEDOT polymer has high conductivity, and bismuth can form an alloy with cadmium ions. Bi/PEDOT nanocomposite materials have a larger specific surface area and more active sites, which is more conducive to absorbing more cadmium ions (Cd 2+ ). The Differential pulse anodic stripping voltammetry method was used to study the electroanalytical performance of the sensor for Cd 2+ . The data show that the oxidation peak current of cadmium ions in the Bi/PEDOT modified electrode is significantly higher than that of other electrodes, due to the synergistic effect of the composite conductive materials. In the concentration range of 1 nM-40 μM, the concentration of cadmium ions shows a good linear relationship with the peak current, and the lowest detection limit is 0.33 nM. In addition, the sensor also exhibits good stability, reproducibility and very low detection limit, which can be used for rapid determination of trace cadmium ions, with a recovery rate in actual sample analysis of 101.4 %-104.0 %.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2017
·
IF 3.582
Xiaoliang Li,Jie Cheng,Yanxiang Liu,Shoutao Gong,Gaohong He,Lingdong Li,Shanshan Li,Fengxiang Zhang
This work reports the design, fabrication and properties of 4,4′-oxydiphenylguanidinium-bridged-silsesquioxane (ODGBS) modified polysulfone anion exchange membrane (AEM). It was prepared by sol-gel polymerization of ODGBS in the network of cross-linked, quaternized polysulfone. With hydrophilic biphenylguanidinium and Si O Si moieties working synergistically, the ODGBS derived gel functions as a water “reservoir” in the membrane and thus gives rise to high water uptake, which facilitates hydroxide ion transport via a vehicular mechanism. High water uptake may also “dilute” hydroxide ion at the vicinity of cations and lessen the hydroxide attack on cations. Moreover, ODGBS does not contain β hydrogen atoms , thus reducing the likelihood of Hofmann elimination under hydroxide attack. Due to the above benefits, ODGBS modified AEM could exhibit an improved conductivity from 19 to 25 mS/cm 2 at 30 °C, and a conductivity retention of 85% when treated in 1 M NaOH at 60 °C for 120 h, higher than that of the un-modified AEM (72%). This work provides a new strategy for enhancing stability and conductivity of AEM.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2016
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IF 1.207
Lei Yang,Yangyang Zhang,Hua Li,Hezhou Liu
Metallic bismuth crystal is one important and interesting semimetal that has attracted great attention owing to its unique thermal and electrical properties. Herein, we report a facile, green, cost-effective and sustainable solvothermal process using ethanol, glycol, isopropanol, phenylcarbinol as solvent and commercial Bi 2 O 3 as the starting material to produce high-purity metallic Bi with tunable morphologies on large scale. It is found that all alcohols are capable of reducing Bi 2 O 3 to Bi and the reducibility of glycol is proved to be the strongest. The highest purity of the resultant Bi is calculated to be 99.74%. What's more, the morphology of final Bi particles is controllable by adding various types and concentrations of additives. As a consequence, our work lays the root for the large scale solvothermal production of high-purity Bi particles with various regular morphologies.
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ANALYST
·
2013
·Vol. 138
·期 11
·3259-3263
·
IF 3.969
Ying Shuai,Changhua Liu,Jia Wang,Xiaoyan Cui,Ling Nie
This work creatively uses peroxidase-like ZnS hollow spheres (ZnS HSs) to cooperate with glucose oxidase (GOx) for glucose determinations. This approach is that the ZnS HSs electrocatalytically oxidate the enzymatically generated H2O2 to O2, and then the O2 circularly participates in the previous glucose oxidation by glucose oxidase. Au nanoparticles (AuNPs) and carbon nanotubes (CNTs) are used as electron transfer and enzyme immobilization matrices, respectively. The biosensor of glucose oxidase–carbon nanotubes–Au nanoparticles–ZnS hollow spheres–gold electrode (GOx–CNT–AuNPs–ZnS HSs–GE) exhibits a rapid response, a low detection limit (10 μM), a wide linear range (20 μM to 7 mM) as well as good anti-interference, long-term longevity and reproducibility.
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Journal of Materials Chemistry A
·
2016
·Vol. 5
·期 1
·266-274
·
IF 8.262
Man Huang,Kan Mi,Junhao Zhang,Huili Liu,Tingting Yu,Aihua Yuan,Qinghong Kong,Shenglin Xiong
To tackle the issue of the low specific capacity (372 mA h g−1) of graphite as the anode material for lithium-ion batteries (LIBs), an effective and controllable strategy was developed to construct porous bimetallic Co/Zn embedded N-doped carbon (Co–Zn/N–C) polyhedral nanocages via annealing a ZIF-8@ZIF-67 precursor at 800 °C under Ar atmosphere. The results clearly displayed that metallic Co and Zn particles are uniformly dispersed in the carbon matrix. Porous Co–Zn/N–C polyhedral nanocages have a large specific surface area of 349.12 m2 g−1 and contain plenty of micropores and mesopores, which benefit from the carbonization of organic ligands and the catalytic effect of cobalt in the calcination process. As anodes for LIBs, the porous Co–Zn/N–C polyhedral nanocages showed an initial discharge capacity of 809 mA h g−1 and a capacity retention of 702 mA h g−1 after 400 cycles at a current density of 0.2 A g−1. Furthermore, a reversible capacity of 444 mA h g−1 was obtained at a much higher current density of 2 A g−1. The improved electrochemical performance was attributed to the synergistic effect of Zn and Co, the unique porous hollow structure as well as N doping, which relieved the impact of volume changes, maintained perfect electrical conductivity throughout the electrode and enhanced the electrochemical activities of lithium storage.
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ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Zhibin Zhang,Lei Wang,Xixian Yang,Mengyuan Chu,Liyun Huang,Jiayi Fan,Wucheng Xie,Defei Liu,Wenbing Yuan,Yue Situ
The electroreduction of CO2 to formate is of significant interest due to its potential for sustainable fuel and chemical production. Hollow fiber electrodes, which integrate gas diffusion and catalytic layers, offer structural advantages. These advantages enhance gas–solid–liquid-phase reactions, making them particularly beneficial for CO2 electroreduction. This work reports a copper–bismuth alloy hollow fiber with a nanostructured surface, designed with specific metal ratios and transformed into a sulfur surface-modified copper–bismuth alloy hollow fiber (Cu7S4–CuBi HF) electrode with nanoflower structures. CO2-penetration mode enhances formate current density and Faradaic Efficiency (FE) while suppressing the hydrogen evolution reaction (HER), due to the fiber’s unique gas transport. The nanoflower morphology increases the electrochemical active surface area, boosting current densities. This design achieved a formate FE of 91.27% at −0.9 V vs RHE and a current density of 80.12 mA cm–2, outperforming many existing Cu@Bi electrocatalysts. This success is due to the innovative surface design and the distinct structural features of the hollow fiber electrodes.
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CATALYSIS TODAY
·
2024
·
IF 5.2
Peng Bai,Yicheng Zhao,Yongdan Li
Photocatalytic N -formylation of amines with CO 2 is a promising strategy to convert CO 2 into value-added chemicals sustainably. In this work, Pd-Bi bimetallic modified ZnO enriched in oxygen vacancies is constructed for photocatalytic CO 2 formylation of benzylamine at room temperature without any reductants. The Pd and Bi sites reduce the band gap energy of ZnO, promote the separation of the photogenerated charge carriers and enhance the adsorption capacity of CO 2 . The yield of N -benzylformamide reaches 31.7 mmol g −1 with a selectivity of 85.3 % after 3-hour radiation in N , N -dimethylformamide (DMF) solvent. The aldehyde group involved in the formylation of benzylamine is derived from the decomposition of DMF, which is regenerated with the aldehyde group coming from the reduction of CO 2 . The decomposition-regeneration cycle of DMF solvent enlarges the reaction region, which is beneficial to the activity and selectivity of the formylation process. The synergistic photocatalytic system shows a good universality. This study provides a new approach to high-efficiency CO 2 utilization and formamide production.
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