CRYSTENGCOMM
·
2019
·Vol. 21
·期 45
·6935-6944
·
IF 3.382
Qunling Fang,Yuhang Sun,Jinyu Duan,Linfeng Bai,Kezhu Xu,Qinshan Xiong,Huajian Xu,Ken Cham-Fai Leung,Ailing Hui,Shouhu Xuan
Metal–organic framework (MOF)-derived nanostructures exhibit wonderful characteristics and possess broad application potential by modulating the complex composition and inner nanostructure. Although various MOF-based nanocomposites have been successfully developed, a facile method that can easily modulate the structure-dependent chemical components of the MOF-derived hybrids remains a challenge. By coating zeolitic imidazolate framework-8 (ZIF-8) with Au/polydopamine (Au/PDA) via in situ redox-oxidation polymerization of HAuCl4 and dopamine, it was found that the ZIF-8 templates were simultaneously etched off to give Au/PDA hybrid microcapsules with a cubic shape. This one-step sacrificial templating process followed a competing chelation between gold ions and Zn2+ cations to 2-methylimidazole and PDA; thus, both the hollow and the yolk-like hybrid cubic microcapsules were controllably obtained by varying the synthetic dynamics. Owing to the hollow nature, penetrated PDA shell, well-distributed Au nanocrystals, and unique stable nanostructure, the non-spherical Au/PDA hybrid cubic microcapsules showed high performance in catalyzing the reduction of 4-nitrophenol as well as adsorption/release of ibuprofen as a model drug. Moreover, this simple strategy offers a controllable design in developing multifunctional nanocomposites with definite inner nanostructures and activities for nanocatalysis, drug delivery, energy storage etc.
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高影响因子
JOURNAL OF CATALYSIS
·
2022
·
IF 8.047
Jing Huang,Jiawei Dai,Jiannan Zhu,Rong Chen,Xiaoqi Fu,Hongfang Liu,Guangfang Li
Electrocatalytic reduction of CO 2 (CO 2 RR) represents a promising approach to reduce CO 2 emission and generate value-added chemicals. Herein, we developed bimetallic Au-Cu gradient alloy nanostructures (AuCu-g) comprising of ultrathin Cu-rich alloy surface and Au-rich alloy core as electrocatalyst via a facial solvothermal method. Impressively, the AuCu-g can stably generate a considerable amount of C 2 H 4 with faradaic efficiency (FE) ∼20 % at a low limiting potential of −0.4 V versus reversible hydrogen electrode (RHE) due to its unique gradient structure and multi-component tandem effect. The potential-dependent in situ Raman spectrum indicated an enhanced *CO adsorption strength and a remarkable CO intermediate generation over Au-Cu gradient alloy at low overpotentials during CO 2 reduction process. This work shines a light for developing mutilmetallics toward efficient CO 2 RR.
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ACS Applied Nano Materials
·
2022
·
IF 6.14
Yongjun Luo,Xiaoping Zhu,Jun Qian,Yiyi Yu,Jing Li,Zhiyong He,Suyan Duan,Honglei Guo,Xiangchun Shen,Qianqian Guo
Overuse of antibiotics has led to an increased threat of drug-resistant pathogens and sustained chronic infections, suggesting an urgent need for effective strategies against drug-resistant bacterial infections. Herein, we developed au gold nanorods coated with pH-responsive polymers (GNR-DPArPEGMA) for photothermal therapy against multidrug-resistant bacteria. The size and zeta potential of GNR-DPArPEGMA was 78 nm and −37.96 mV, respectively. In subacidic conditions, the nanocomposite surface was positively (14.18 mV) charged, leading to better bacterial adhesion and antibacterial efficiency. The nanocomposites showed augmented in vitro photothermal efficiency up to 70 °C under 808 nm irradiation for 3 min, which further demonstrated an enhanced photothermal bacteria-killing efficiency. The in vivo assays showed that GNR-DPArPEGMA irradiated with near-infrared radiation could treat a drug-resistant Staphylococcus aureus-caused subcutaneous abscess and drug-resistant Pseudomonas aeruginosa-caused pneumonia while reducing the number of bacteria and attenuating inflammation in the infected sites. These results indicate that the nanocomposites could be used as a potential photothermal agent to combat drug-resistant bacterial infections in the future.
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高影响因子
TALANTA
·
2023
·
IF 6.1
Shuyan Ruan,Ru Liu,Xi Chen,Qian Huang,Chongxin Xiao,Ruiyun You,Luqiang Huang,Yunzhen Liu,Jingbo Chen,Xiufeng Xiao,Qingqiang Lin,Yudong Lu
As a reactive oxygen species (ROS), excessive production of H 2 O 2 contributes to the development of several diseases such as, inflammation, cancer, and respiratory diseases. Supplementation with endogenous or exogenous antioxidants can scavenge ROS and reduce the oxidation of cellular molecules, thus alleviating the generation of diseases. Therefore, the determination of H 2 O 2 content and its antioxidant activity is of great importance in disease diagnosis and treatment. In this paper, a ratiometric SERS sensor with a flexible cellulose membrane was designed for quantitative detection of H 2 O 2 and assessment of antioxidant activity. First, gold seeds were reduced on bacterial cellulose membrane (BCM) and Au NPs were smoothly deposited on the bacterial cellulose membrane (BCM) using halides to reduce the reduction potential in the growth solution to form a flexible BCM@Au NPs SERS substrate. Afterwards, the oxidation of H 2 O 2 was used to convert 3-mercaptophenylboronic acid (3-MPBA) to the corresponding phenol form 3-hydroxyphenylethanol (3-HTP). The change of substance resulted in a good linear relationship between the intensity ratio corresponding to the two Raman shifts of 881 cm −1 and 995 cm −1 and the H 2 O 2 concentration with a detection limit of 0.0186 μM. This opens up a new method for the detection of H 2 O 2 with high sensitivity and accuracy. In addition, this SERS platform was successfully used for the determination of antioxidant activity. It is promising to be applied to disease diagnosis and efficacy evaluation.
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PubMed
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Huihui Xie,Qixu Hu,Junzi Huang,Min Liu,Peng Wei,Yahong Xie,Ying Qi
The plasmonic property of metal nanoparticles could improve the photovoltaic performance of perovskite solar cells (PSCs). In this work, the plasmonic Au nanoparticles (Au NPs) was introduced into the SnO 2 electron transport layer (ETL), improving the photovoltaic performance of perovskite solar cells (PSCs) based on carbon electrode by approximately 26.28 %. The device structure is the FTO glass/SnO 2 /perovskite (CH 3 NH 3 PbI 3 )/carbon electrode. By optimizing the volume of Au NPs, the photocurrent of PSCs increased from 18.49 mA cm −2 to 23.25 mA cm −2 by 25.74 %, and the power conversion efficiency (PCE) from 10.96 % to 13.84 % by 26.28 %. The improved performance of the device is due to the local surface plasmon resonance (LSPR) of Au NPs, which enhances the optical absorption in the perovskite layer and improves the conductivity of the electron transport layer (ETL). Fluorescence spectroscopy showed that PSCs containing Au NPs reduced the recombination of electron and hole between the interface of ETL and perovskite and could transmit charge faster than PSCs without Au NPs. These results indicate that the plasmonic metal nanoparticles can greatly improve the efficiency of PSCs.
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Advanced Science
·
2023
·
IF 15.1
Liang Xiao,Benjin Chen,Wanni Wang,Tian Tian,Haisheng Qian,Xiaohu Li,Yongqiang Yu
Radiotherapy (RT), a widely used clinical treatment modality for cancer, uses high-energy irradiation for reactive oxygen species (ROS) production and DNA damage. However, its therapeutic effect is primarily limited owing to insufficient DNA damage to tumors and harmful effects on normal tissues. Herein, a core-shell structure of metal–semiconductors (Au@AgBiS 2 nanoparticles) that can function as pyroptosis inducers to both kill cancer cells directly and trigger a robust anti-tumor immune against 4T1 triple-negative murine breast cancer and metastasis is rationally designed. Metal-semiconductor composites can enhance the generation of considerable ROS and simultaneously DNA damage for RT sensitization. Moreover, Au@AgBiS 2 , a pyroptosis inducer, induces caspase-3 protein activation, gasdermin E cleavage, and the release of damage-associated molecular patterns. In vivo studies in BALB/c mice reveal that Au@AgBiS 2 nanoparticles combined with RT exhibit remarkable antitumor immune activity, preventing tumor growth, and lung metastasis. Therefore, this core-shell structure is an alternative for designing highly effective radiosensitizers for radioimmunotherapy.
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PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Yiping Yang,Jingxuan Hao,Xinting Lv,Jinyong Lei,Xurui Huang,Jun Pan,Fengyuan Yu,Zihao Liao,Jing Zhou,Guoping Xiao,Xiao Lin,Jian-Qiang Wang,Linjuan Zhang
In reversible solid oxide cells (rSOCs), the slow reaction rate of oxygen reduction reaction and the rate of OER were the primary issues limiting their development. Up to now, a large amount of oxygen electrode materials have been studied for high-temperature rSOC, but stable materials that can be applied to large cells are still relatively rare. At present, LSCF remains the most important material for oxygen electrodes in the large-scale production of rSOCs. In this work, low-coordination Au nanoparticles were loaded onto the surface of LSCF. The maximum power density of the LSCFA oxygen electrode single cell at 0.6 V is up to 0.79 W/cm2, 1.58 times that of the pure LSCF-based single cell, and the current density of 1.3 V under SOEC mode is up to 1 A/cm2, which is 1.6 times that of the pure LSCF-based single cell. DRT analysis shows that the introduction of a low coordination number Au not only significantly reduces the Ohmic impedance of LSCF itself but also improves the conductivity of O2–. The development of this work is of great importance for the subsequent development of high-performance and high-stability rSOC.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2023
·
IF 7.8
Rengui Weng,Guohong Chen,Yifan Liu,Yuancai Lv,Chunxiang Lin,Xiaoxia Ye,Minghua Liu
A reductive cellulose-based aerogel (VTCA) was fabricated from cellulose by introducing valonea tannin through cross-linking reaction. VTCA owned high porosity of more than 96% with the average pore size of 30–50 µm, and it exhibited good adsorption performance for Au(III) at a wide pH values range (1−8) with the max adsorption capacity of 243.1 mg g −1 . VTCA showed good adsorption performance for Au(III) under the interference of various co-existing ions. The adsorption obeyed the pseudo-second-order kinetic model and the Langmuir adsorption isotherm model, and temperature rise was favorable for adsorption. The adsorption-reduction mechanisms mainly involved electrostatic interaction, chelation adsorption and reduction. Au(III) could be effectively adsorbed onto the surface of VTCA by electrostatic attraction and chelation, and then reduced in situ to Au 0 by phenolic hydroxyl on tannic structure. This study provides a new adsorbent with the advantages of convenient preparation and high efficiency, and it has great application prospects in the enrichment and recovery of precious metals in waste liquid and the treatment of oxidized pollutants.
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高影响因子
ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Wanqing Yu,Fangjing Mo,Jiang Guo,Yuqin Yang,Yushuang Jin,Yingzi Fu
Seeking and constructing superior photoactive materials have the potential to improve the performance of photoelectrochemical (PEC) biosensors. In this work, we proposed a novel mimosa-like ternary inorganic composite with a significantly enhanced light-harvesting ability and photogenerated carrier separation rate. This ternary photoactive material was obtained via electrodeposition of gold nanoparticles (Au) on the surface of transition metal sulfide composite of CdS and NiS (CdS-NiS/Au). The experimental results showed that the high initial photocurrent was acquired on CdS-NiS/Au (68-fold higher than that of individual CdS) with the synergistic effect of p-n heterojunction, Schottky junction, and the eminent optical properties of gold nanoparticles. Meanwhile, using silver nanoclusters prepared by link DNA protection as an effective quencher, integrating the duplex-specific nuclease-assisted rolling circle amplification strategy, a “Signal ON” PEC biosensor was fabricated for the detection of microRNA 21 (miRNA 21). With the release of the quencher, the recovered photocurrent is able to achieve determination of miRNA 21 within the range from 10 aM to 1 pM with a detection limit down to 4.6 aM (3σ). Importantly, this work not only provides a superb idea for designing ternary inorganic heteromaterials with exceptional photoactive ability but also allows the detection of other biomarkers by selecting appropriate recognition units.
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高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2023
·
IF 4.3
Peng Li,Baihui Wang,Mengyao Qi,Huan Jiang,Yifei Li,Xia Zhang
Tobramycin aptamer was adsorbed on the surface of gold nanoparticles (Au NPs) by van der Waals forces , hydrogen bonds , and other factors, limiting nanozyme peroxidase activity. Because tobramycin has a higher affinity for the tobramycin aptamer, including tobramycin in Au@Apts nanozymes was able to dislodge the aptamer from the surface of Au NPs and restore the catalytic activity of nanozymes. Raman spectroscopy of the enzyme-catalyzed product TMB ox can detect this shift in enzyme activity . The restored value of nanozyme activity increased with tobramycin concentration and had a good linear correlation in the concentration range of 10 −10 ∼10 −1 M with a detection limit of 2.04 × 10 −11 M. Aptamer biosensors are built using the SERS platform, which has the advantages of high sensitivity, high precision, and a wide detection range. It is prospectively employed in food safety and the detection of antibiotic residues.
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高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Min Liu,Junzi Huang,Huihui Xie,Salman Riaz,Wenbo Fan,Weitao Han,Liang Li,Peng Wei,Yahong Xie,Ying Qi
In this work, we designed the plasmonic photocatalyst of Au–BiOCOOH through a one-pot method, which can be used to effectively treat wastewater contaminated with rhodamine (RhB) and tetracycline (TC). Compared with neat BiOCOOH, as expected, the resulting Au–BiOCOOH illustrated significantly boosted photocatalytic efficiency for degrading RhB and TC under visible light illumination. Remarkably, 3.0%Au–Bi showed the most optimal performance against RhB and TC, achieving degradation rates of 99.5 % and 99.7 % within 120 min. Through multiple characterization techniques, the physical and chemical photoelectric properties of the photocatalyst as well as the photocatalysis mechanism were discussed in detail. UV–visible diffuse reflectance spectroscopy (DRS) analysis demonstrates that the loading of Au nanoparticles (Au NPs) onto 2D nanosheets of BiOCOOH significantly expanded the wavelength range of response of BiOCOOH to visible light. Separately, the outcomes of electrochemical impedance spectroscopy (EIS) and photoluminescence (PL) manifestly reveal that the presence of Au NPs on BiOCOOH can efficiently reduce the interfacial charge transfer resistance and accelerate the photogenerated charge transfer. The free radical trapping test provided evidence for the essential role played by holes (h + ) and superoxide radicals (·O 2 − ) were involved in the degradation of RhB. The study provided a possibility to improve the photocatalytic efficiency of BiOCOOH.
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LUMINESCENCE
·
2023
·Vol. 39
·期 2
·e4651
·
IF 2.9
Weiwei Yuan,Shuhuai Li,Xionghui Ma,Chaohai Pang,Yuwei Wu,Mingyue Wang,Bei Li
The luminescence performance of fluorescent reagents plays a crucial role in fluorescence analysis. Therefore, in this study, a novel bi-ligand Zn-based metal–organic framework, Au nanoparticle (NP) fluorescent material was synthesized using a hydrothermal method with Zn as the metal source. Simultaneously, a DNA aptamer was introduced as a molecular recognition element to develop a Zn-based MOF@Au NPs/DNA aptamer fluorescent probe for the ultra-trace detection of thiamethoxam residues in agricultural products. The probe captured different concentrations of the target molecule, thiamethoxam, through the DNA aptamer, causing a conformational change in the DNA aptamer and bursting the fluorescence of the probe, therefore establishing a fluorometric method for thiamethoxam detection. This method is highly sensitive due to the excellent luminescence properties of the Zn-based MOF@Au NPs, and the DNA aptamer can specifically recognize thiamethoxam, offering high selectivity. The linear range of the method was 2.5–6000 × 10 −11 mol L −1 , with a detection limit of 8.33 × 10 −12 mol L −1 . This method was applied to the determination of actual samples, such as bananas, and the spiked recovery rate was found to be in the range 84.05–109.07%. Overall, the proposed probe has high sensitivity, high selectivity, and easy operation for the detection of thiamethoxam residues in actual samples.
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