Crystals
·
2026
·Vol. 16
·期 6
·368
·
IF 2.9
Xiaolu Mao,Changsheng Yin,Yang Cao,Xiaodong Shen,Wenbo Xin
Carbon nanotubes (CNT) are among the strongest candidates for electromagnetic interference (EMI) shielding materials because of their excellent performance. However, when assembled into macroscale materials, their conductivity is usually limited to 104S/m, restricting further application as shielding materials. Here, we prepared a carbon nanotube composite film (Au/Cl-CNT) with high conductivity and excellent EMI properties. Characterizations confirm that Au exists in the form of uniform Au plates and particles anchored on the CNT surface, while Cl is doped into the CNT framework as halogen dopants. The optimized Au/Cl-CNT film delivers an ultra-high electrical conductivity of 3.39 × 105S/m, which is approximately 23 times higher than that of the pristine CNT film. The excellent electrical properties of the Au/Cl-CNT films endow them with excellent EMI shielding effectiveness (SE). Au/Cl-CNT films with a thickness of ~10.5 μm achieve an EMI SE of up to 67 dB across both the X-band and Ku-band. The superior EMI SE mainly results from the combined effect of various mechanisms, namely reflection inside and outside the material, as well as absorption inside the material. This work clarifies the synergistic enhancement mechanism of Au and Cl on CNT conductivity and EMI shielding, offering new insights into halogen-modified shielding materials.
✓ 已验证
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2026
·
IF 6.9
Meng Xiang,Qingyue Wang,Yancheng Zhu,Mengyu Qin,Wangxi Fan,Zhou Yang,Shuang Dong
Background The exploitation of rapid and efficient electrochemical sensors for small inorganic molecules detection is crucial for environment assessment and health surveillance. Pristine metal-organic frameworks (MOFs) display low intrinsic conductivity, and common noble-metal materials suffer from particle agglomeration and high nitrite oxidation potential. Developing high-performance heterostructures for trace nitrite sensing thus remains challenging. Methods In this study, we integrated Au nanoclusters (Au-NCs) into zinc-based metal–organic framework nanopieces (Zn-BDC NPs) to form a novel zinc-based metal–organic framework nanopieces/Au nanoclusters (Zn-BDC NPs/Au-NCs) heterojunction nanocatalyst, which was then applied to the electrochemical detection of nitrite. Au-NCs can compensate for the insufficient conductivity of Zn-BDC NPs, thereby accelerating electron transfer. Combined Density Functional Theory (DFT) calculations reveal that the heterojunction achieves favorable nitrite adsorption energy, which enriches exposed active sites and significantly lowers nitrite oxidation potential. Significant Findings The Zn-BDC NPs/Au-NCs sensor achieves a sensitivity of 116.8 μA/(mM·cm²), a detection limit of 70 nM, and a linear range of 0.7–833.5 μM for nitrite detection. This provides new candidate materials for the precise and efficient detection of nitrite in environmental waters.
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale Advances
·
2026
·
IF 4.6
Yongfeng Tian,Wang Huo,Jing Xie,Shanzhai Shang,Xia Zhang,Donglai Zhu,Gaofeng Dong,Mingquan Yang,Xingjiu Huang,Xianghu Tang
Surface-enhanced Raman spectroscopy (SERS) has been widely used for trace analyte detection, largely depending on the design and fabrication of SERS substrates. Among the various types of substrates, hybrid materials that integrate plasmonic metals with functional semiconductors have attracted increasing attention due to their synergistic properties. This study presents the rational design and synthesis of CuxO/Au chimeric micro–nanoparticles as high performance substrates for SERS detection. The hybrids were fabricated via a galvanic replacement reaction, where Cu2O particles acted as both sacrificial templates and reducing agents for the deposition of Au nanostructures from HAuCl4 solutions. By systematically varying the HAuCl4 concentration, the morphology, composition, and interfacial properties of the resulting materials were precisely tuned. The optimized substrate, denoted as CuxO/Au-10, demonstrated remarkable SERS performance, attributed to the synergistic effect of electromagnetic enhancement from Au nanoparticles and chemical enhancement arising from charge transfer at the metal–semiconductor interface. The SERS activity was rigorously evaluated using nicotine as a probe molecule, showing high detection sensitivity. Furthermore, the practical applicability of the substrate was successfully demonstrated in a dynamic puff-by-puff analysis of tobacco smoke from both conventional cigarettes and heated tobacco products (HNB). SERS detection revealed significantly more complex and intense spectra for traditional cigarette smoke compared to the smoke from HNB cigarettes. This highlights the sensitivity and utility of CuxO/Au chimeric micro–nanoparticles for dynamic chemical analysis. This work not only offers a tunable synthesis strategy for high-performance SERS substrates but also paves the way for their application in complex environmental and analytical scenarios.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 8
·1118
·
IF 4.034
Qiuwan Han,Dongyang Zhang,Jiuli Guo,Baolin Zhu,Weiping Huang,Shoumin Zhang
The gold catalysts supported on various morphologies of α-Fe2O3in carbon monoxide (CO) oxidation reaction have been studied for many researchers. However, how to improve the catalytic activity and thermal stability for CO oxidation is still important. In this work, an unusual morphology of α-Fe2O3was prepared by hydrothermal method and gold nanoparticles were supported using a deposition-precipitation method. Au/α-Fe2O3catalyst exhibited great activity for CO oxidation. The crystal structure and microstructure images of α-Fe2O3were carried out by X-ray diffraction (XRD) and scanning electron microscopy (SEM) and the size of gold nanoparticles was determined by transmission electron microscopy (TEM). X-ray photoelectron spectra (XPS) and Fourier transform infrared spectra (FTIR) results confirmed that the state of gold was metallic. The 1.86% Au/α-Fe2O3catalyst calcined at 300 °C had the best catalytic performance for CO oxidation reaction and the mechanism for CO oxidation reaction was also discussed. It is highly likely that the small size of gold nanoparticle, oxygen vacancies and active sites played the decisive roles in CO oxidation reaction.
✓ 已验证
DOI
高影响因子
Nature Communications
·
2026
·
IF 18.1
Zhang Mengya,Yu Tongcheng,Liu Hao,Lin Chao,Yang Yaping,Lv Bowen,Zhang Qi,Chen Ming,Wang Tianshuai,Hua Weihong,Han Kai
Monitoring the evolution of molecules during photo and thermal synergistically induced physical and chemical processes is of paramount interest in fields including chemical, material, and energy research. Surface-enhanced Raman spectroscopy (SERS) is a highly promising technology in this regard, offering advantages of sensitivity, real-time, and label-free detection. However, the application of conventional SERS in high-temperature environments has faced challenges due to the inevitable loss of activity and decline in sensitivity. Herein, we synthesize Au-TiO 2 nanoarrays as SERS substrates, and an anomalous enhancement of Raman signal with increasing temperature is observed. The signal intensity increases by 11.41 times at 180 °C compared to that at 22 °C. This high-temperature enhancement in Raman activity is attributed to an underlying mechanism: heat-assisted hot-hole transfer, which enables 785 nm photon-induced hot-hole transfer from Au to TiO 2 . Our work expands the application of the SERS technique for high-temperature chemical analysis and molecular diagnostics.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yaqin Yu,MengXue Wei,Junting Tong,Zhengdong Zhang,Xiaowei Song,Anni Liu,Rui Wang,Yu Zhang,Zhen Zhou
Arsenic (As) and antimony (Sb) are emerging pollutants with significant toxicity and carcinogenic potential. Their contamination in drinking water represents a health and safety risk. A novel Au-Fe 3 O 4 -C sensor was synthesized using an electrodeposition technique that leverages the superior electro-catalytic properties of gold (Au), the high adsorption capacity of Fe 3 O 4 , and the excellent conductivity of carbon fiber cloth. The Au-Fe 3 O 4 -C sensor enhanced the sensitivity of As and Sb stripping signals and reduced the limits of detection. Square wave voltammetry (SWV), used for As analysis, yielding LODs of 0.24 μg L −1 for As(III) and 1.20 μg L −1 for As(V). Differential pulse voltammetry (DPV), used for Sb analysis, yielding LODs of 0.50 μg L −1 for Sb(III) and 0.60 μg L −1 for Sb(V). We report quantitative detection of As and Sb in a mixed solution through DPV combined with the non-linear least squares based on Pearson function. The portable electrochemical workstation combined with Au-Fe 3 O 4 -C sensor was installed on a mobile inspection vehicle to detect As/Sb in groundwater (Shanxi, China) and rivers (Hunan, China). The indication error reached below12%, confirming the capability of electrochemistry based on Au-Fe 3 O 4 -C sensor for the field determination.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2025
·
IF 3.2
Bai-Quan Zhu,Chen-Yu Zhang,Er-Fei Zhen,Dong-Chen Zhao,Jun Cai,Yan-Xia Chen
Electrochemical double layer (EDL) theory predicts that cations will accumulate in the EDL as the negative free excess charge increases on electrode surfaces. So far, it is not clear how the enrichment of protons affects the structure of interfacial water, the hydrogen bond network, and the kinetics of reactions such as hydrogen evolution reaction (HER). By taking the Au electrode/HClO4 interface as a model system, herein, we provide molecular evidence on the gathering of hydrated protons near the negatively charged electrode surface using electrochemical in situ infrared spectroscopy under attenuated total reflection configuration (ATR-FTIRS). To facilitate the assignment of IR bands observed at the interface, transmission IR spectra of bulk HClO4 solutions with various concentrations have also been recorded. Our results reveal that (i) there is a broad absorption continuum in the range from 1200 to 3000 cm–1, from the O–H stretching vibration of flanker water molecules directly connected to proton, in addition to the characteristic peak at ca. 1730–1 cm from the corresponding bending vibration; (ii) the higher the concentration of the acidic electrolyte or the more negative the applied potential, the stronger the absorption of the broad continuum at the Au/HClO4 interface. Such good correlation confirms the accumulation of protons near the negatively charged electrode surface. The impact of the enrichment of protons near the electrode surface on the interfacial structure of the water network and the kinetics of the HER are briefly discussed.
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Physics
·
2022
·
IF 11.021
An Hua,Zifeng Mai,Binyu Wu,Zichong Ji,Min Fu,Yougen Hu,Siya Huang
Flexible and stretchable electrodes as the cornerstone of bioelectronics are bridging human with biomedical devices in an unprecedentedly intimate and safer way. However, maintaining high electrical properties while adapting to moist, complex and dynamic biosurfaces for a prolonged period of usage remains a great challenge. Herein, we demonstrate an omnidirectionally stretchable transparent electrode based on serpentine Au nanotrough (AuNT) networks with highly tunable optoelectronic performances (sheet resistance of down to ∼13 Ω sq −1 at transmittance of 90%). Owing to the junction-free nanoweb structure with an ultralow percolation density, the AuNT networks demonstrate excellent thermal stability as an efficient Joule heater with a wide operating temperature range up to 390 °C. The in-plane buckled AuNT electrode exhibits controllable heat generation upon repetitive tensile strains of 60%, enabling wearable thermotherapy at highly strained joints . Such highly stretchable electrodes can be directly laminated on the balloon catheter as expandable, high-density nanomesh ablators, showing excellent thermal and moisture stability during 15 days of storage under conditions of relative humidity of 85% at 70 °C and over 1000 heating cycles to 60 °C, offering strong potential for biomedical therapeutics , such as thermal ablation and electrochemotherapy.
研究领域:
生物医学工程
·
柔性电子学
·
转化医学
·
生物传感器
·
组织工程
·
纳米医学
·
穿戴式医疗设备
✓ 已验证
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 72
·45420-45431
·
IF 3.108
Jiuli Guo,Huanhuan Yu,Feng Dong,Baolin Zhu,Weiping Huang,Shoumin Zhang
A highly efficient and stable Au–Cu/hydroxyapatite (HAP, Ca10(PO4)6(OH)2) catalyst was reported. HAP was prepared through a deposition–precipitation method. Au–Cu/HAP catalysts were obtained by a two-step impregnation approach. The samples were characterized by XRD, TEM, SEM, UV-Vis, ICP, XPS, H2-TPR, and O2-TPD. CO oxidation reaction was carried out to evaluate the catalytic performance of samples. TEM and UV-Vis results showed that the metallic particles supported on Au–Cu/HAP were smaller than those on Au/HAP, and they were highly dispersed on the HAP support. Patterns of XPS revealed that CuO nanoparticles were formed in the Cu/HAP catalyst, while CuO and Cu2O species coexisted in Au–Cu/HAP catalyst. Based on the O2-TPD data, the addition of copper to Au/HAP gave rise to more new O2 adsorption sites and bigger O2 adsorption capacity. The catalysis results indicated that the Au–Cu/HAP was capable of obtaining higher efficiency and stability compared with Au/HAP and Cu/HAP for CO oxidation. It was likely that the synergistic interaction between gold and CuOx phase created the most active sites on Au–Cu/HAP and was responsible for the enhanced activity and stability in comparison with Au/HAP and Cu/HAP.
研究领域:
催化化学
·
材料科学
·
环境化学
·
纳米催化
·
表面科学
✓ 已验证
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2023
·Vol. 29
·期 34
·e202300454
·
IF 4.3
Henglong Xiang,Sijun Huang,Dongwei Zhu,Liqiang Yu,Rui Liu,Yi Guo,Li Xu
Graphical [Ag(NH 3 ) 2 ] + can be directly used as an electron acceptor for the oxidation of glucose by AuNPs to accelerate Tollens′ reaction, The formed Ag nanoparticles continued to act as a cascading catalyst to accelerate the reaction and indicator, which provides a possibility for the rapid colorimetric glucose detection. Au nanoparticles (NPs) have been proven to be excellent glucose oxidase (GOx) mimics, which can catalyze the electrons transform pathway from glucose to oxygen. This study confirmed AuNPs can accelerate the reaction between [Ag(NH 3 ) 2 ] + and glucose under alkaline conditions, which is also known as the Tollens′ reaction, and the possible mechanism was proposed. Here, [Ag(NH 3 ) 2 ] + instead of O 2 acted directedly as an electron acceptor during glucose oxidation catalyzed by AuNPs, accompanied by hydrogen transfer. The as-synthesized Ag nanoparticles can also catalyze this process, similar to AuNPs, via a unique cascading catalysis mechanism in the Tollens′ reaction. A simple and heatless glucose colorimetric assay can be established based on the plasmonic band of AgNPs with a liner range of 0.6–22.2 μM, and the limit of detection is 0.32 μM.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysts
·
2023
·Vol. 13
·期 4
·643
·
IF 3.9
Minming Bao,Yuxi Liu,Jiguang Deng,Lin Jing,Zhiquan Hou,Zhiwei Wang,Lu Wei,Xiaohui Yu,Hongxing Dai
The development of efficient and stable catalysts is of great importance for the elimination of volatile organic pollutants (VOCs). In this work, AuPdxnanoparticles (NPs) were loaded on TiO2through the electrostatic adsorption approach to generate theyAuPdx/TiO2(i.e., 0.35AuPd0.46/TiO2, 0.34AuPd2.09/TiO2, and 0.37AuPd2.72/TiO2;xandyare Pd/Au molar ratio and AuPdxloading, respectively;x= 0.46–2.72; andy= 0.34–0.37 wt%) catalysts, and their catalytic activities for the oxidation of ethyl acetate were determined. The results showed that the 0.37AuPd2.72/TiO2sample exhibited the best activity (T50%= 217 °C andT90%= 239 °C at SV = 40,000 mL/(g h),Ea= 37 kJ/mol, specific reaction rate at 220 °C = 113.8 µmol/(gPds), and turnover frequency (TOFNoble metal) at 220 °C = 109.7 × 10−3s−1). The high catalytic performance of the 0.37AuPd2.72/TiO2sample was attributed to the good dispersion of AuPd2.72NPs, the strong redox ability, the large ethyl acetate adsorption capacity, and the strong interaction between AuPdxand TiO2. Acetaldehyde, ethanol, and acetic acid are the main intermediates in the oxidation of ethyl acetate, and the loading of AuPdxNPs effectively reduces the formation of the toxic by-product acetaldehyde. The oxidation of ethyl acetate over the 0.34AuPd2.09/TiO2sample might occur via the pathway of ethyl acetate → ethanol → acetic acid → acetate → CO2and H2O. We believe that the obtained results may provide a useful idea for the design of bimetallic catalysts under industrial conditions and for understanding the VOCs oxidation mechanisms.Keywords:supported Au–Pd nanocatalyst;ethyl acetate oxidation;strong electrostatic adsorption;sulfur dioxide resistance;reaction mechanism
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Zhen He,Qiaohui Duan,Lingwen Liao,Chengming Wang
Metallic nanocrystals with abundant metastable twin boundaries have demonstrated great potential in prompting the improvement of electrocatalytic reactivity, such as alcohol oxidation reaction (AOR) in fuel cell applications. However, modulating the lattice and electronic structures of such twin-rich nanocatalysts to optimize the AOR activity remains a huge challenge. Herein, jagged Au-Pt bimetallic nanowires with abundant twin boundaries along the 〈1 1 1〉 direction have been constructed via a seeded synthesis method. Importantly, the lattice strain and electronic structures of Pt in the twin-rich nanowires have been feasibly tuned, resulting in the regulation of AOR performances. Impressively, the jagged AuPt3 nanowires, with an atomic ratio of ∼1:3, exhibit the highest mass activity toward ethanol oxidation reaction (EOR) and methanol oxidation reaction (MOR), outperforming AuPt9, AuPt, Pt nanowires and commercial Pt/C catalysts. The structure–activity correlation for the AOR follows a volcano-shaped curve with the increase of Pt ratios. Theoretical results suggest the weakened bonding of Pt-CO and strengthened Pt-OH on the AuPt3 (1 1 1)-twin site. Our work develops a simple yet effective method to synthesize twin-rich bimetallic nanostructures with controlled lattice strain and illustrates their structure-dependent properties, opening the way to develop high-performance electrocatalysts for promising applications.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）