Journal of Materials Chemistry C
·
2025
·
IF 5.1
Pengyu Zhu,Zhilei Wang,Yingjun Fang,Wenchao Wu,Yang yang Wu,Limin Ruan,Jinling Zhao,Wei Zeng
A flexible Te/Ag planar heterojunction (TS) photothermoelectric (PTE) film was successfully fabricated using screen-printing technology for efficient energy conversion applications. The developed TS film exhibits excellent flexibility and a remarkably high Seebeck coefficient, making it particularly suitable for PTE power generation and non-contact sensing applications. The p-type Te semiconductor component demonstrates a high value of 355 μV/K. The TS film exhibits distinct power-dependent photovoltage generation characteristics. Under 808 nm laser irradiation, the output voltage increases progressively with incident power, reaching values of 16.3, 19.3, 21.6, and 22.5 mV at corresponding power levels of 19, 22, 25 and 27 mW, respectively. Notably, at 19 mW irradiation, the photoelectric-to-total voltage ratio peaks at 93.4%, with excellent stability maintained during prolonged laser exposure tests. The effective wind velocity detection range of the sensor is 0.29–1.80 m/s. The TS film's heat-source-free non-contact sensing capability enables human behavior detection and Morse code recognition by virtue of temperature fluctuations caused by wind velocity. These unique properties in both heat-source-free non-contact sensing and PTE power generation offer promising opportunities for advancing flexible electronics and wearable technologies.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Yixuan Wen,Qizhen He,Shuaijun Ding,Wei Zhou,Lei Deng,Liqiang Zhang,Tongde Shen,Qingxiang Yang,Peng Jia,Yuqing Qiao
Silver (Ag) plays an important role as a cathode catalyst in lithium-oxygen batteries (Li-O 2 batteries). However, the catalytic mechanism of Ag remains unclear. Despite efforts dedicated to studying interfacial reactions, observing efficient reactions and ion transport at the Ag-Li solid–solid interface continues to be a challenge. Here, we used Ag nanowires (Ag NWs) as working electrodes, creating a lithiation-oxidation microenvironment within spherical aberration-corrected transmission electron microscopy (ETEM) through a two-step method to investigate the reaction mechanisms at the Ag-Li interface. The lithiation process generates Ag 3 Li 10 , while the oxidation process precipitates Ag nanoparticles (Ag NPs). The alternating reactions of Ag-Ag 3 Li 10 -Ag form a cycle process, elucidating the transport pathway of Li + at the Ag-Li solid–solid interface during discharge process and demonstrating a typical lithium pump effect. Density Functional Theory (DFT) calculations also confirm these results. This work provides novel insights into the interfacial mechanisms of Ag catalysts in Li-O 2 batteries, offering valuable guidance for strategies to monitor and control complex, multi-step interfacial reactions.
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PubMed
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2018
·Vol. 34
·期 3
·369-374
·
IF 1.248
Mi Zhiming,Chen Yao,Chen Xiaodong,Yan Liuqing,Gu Qiang,Zhang Hanqi,Chen Chunhai,Zhang Yumin
A small molecule fluorescent probe, 4-[2-(4-chlorophenyl)-4,5-diphenyl-1 H -imidazol-1-yl]aniline(L) for detecting Ag + ion was gently synthesized via one-pot multi-component reaction catalyzed by H 3 [PW 12 O 40 ] under solvent-free microwave irradiation. When the concentration of Ag+ ion changed from 0 to 8.0×10 −6 mol/L in the solution of H 2 O/CH 3 OH(19:1, volume ratio), the fluorescence emission spectrum was blue-shifted and accompanied by a gradual increase in fluorescence intensity with a low detection limit of 3.0×10 −11 mol/L. Moreover, UV-Vis absorption titration experiment demonstrated a 1:1 stoichiometric ratio and an association constant of (9.95±0.44)×10 5 L/mol between probe L and Ag + ion, and thus their complexation mechanism was also proposed and verified. More importantly, this fluorescent probe was remarkably specific for Ag + ion under the interference of other metal ions and exhibited a wide pH application range of 4.0―8.0. Additionally, preliminary application of this probe was also carried out and satisfactory results were shown.
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高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Jiangfu Zheng,Wenbo Li,Rongdi Tang,Sheng Xiong,Daoxin Gong,Yaocheng Deng,Zhanpeng Zhou,Ling Li,Long Su,Lihua Yang
In this study, an investigation is conducted into the degradation of nitenpyram (NTP) using highly efficient APMMO/PDS/Vis system. As photocatalysts, silver phosphate (AP) and calcined Zn–Al layered double hydroxides (MMO) exhibit high efficiency in achieving charge separation. Besides, the injection of electrons into peroxydisulfate (PDS) from the APMMO can contribute to obtaining the species in the active state with higher efficiency. Based on the APMMO/PDS/Vis system, 50 mg/L of nitenpyram (NTP, 50 mL) can be completely removed in 60 min using 0.8 g/L photocatalyst and 0.2 g/L PDS under the optimum condition and visible light (780 nm > λ > 420 nm). Meanwhile, as demonstrated under visible light within 30 min, an ultrahigh degradation efficiency can be achieved by NTP based on APMMO1/PDS/Vis system. Besides, the electron paramagnetic resonance (EPR) technique and radical quenching experiments suggested 1 O 2 , h + , SO 4 − •, •O 2 − , and •OH are all contributory to the removal of pollutants. Given the outcomes achieved by LC/MS system and mass spectrometry, the primary degradation intermediates of NTP end up being converted into photodegradation products (such as 2-Chloropyridine, 6-Chloropurine Riboside and dl -Leucine). Additionally, there are three potential photodegradation pathways to NTP degradation have been deployed. Moreover, the NTP light degradation occurring in APMMO1/PDS/Vis system is competent under the three types of real water sample. Accordingly, the high-efficiency APMMO1/PDS/Vis system is fit for use in water pollution control for agricultural productions.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2014
·
IF 6.007
Fredrik Gunnarsson,Moa Z. Granlund,Mattias Englund,Jazaer Dawody,Lars J. Pettersson,Hanna Härelind
We report on a high NO x reduction activity over Ag/Al 2 O 3 catalysts, using hydrogen produced in a fuel reformer. The focus of the study is to evaluate the performance of a hydrocarbon selective catalytic reduction (HC-SCR) catalyst in real conditions. Initially, the catalytic materials for the fuel reformer (Rh/CeO 2 -ZrO 2 ) and the HC-SCR (Ag/Al 2 O 3 ) were evaluated in separate bench-scale reactor setups. These two setups were subsequently joined into an integrated bench-scale reactor setup with the aim to evaluate the influence of the reformate on the HC-SCR activity in a controlled environment. In the final phase of the study a 4 wt.% Ag/Al 2 O 3 catalyst doped with 100 ppm(w) Pt was scaled up and tested in a pilot-scale reactor setup. The pilot-scale reactor setup enabled evaluation of the HC-SCR activity in real exhaust gases generated by a single cylinder engine (genset) together with a hydrogen-rich gas supplied from a fuel reformer. Commercial biodiesel (NExBTL) was used as reducing agent for the HC-SCR as well as fuel in the fuel reformer for both the bench-scale and pilot-scale experiments. This study gives an excellent link between evaluations of the catalytic materials, controlled bench-scale experiments and applied engine experiments, proving a viable concept for lean NO x reduction together with onboard hydrogen production. A NO x conversion of above 70% was reached at temperatures below 250 °C, in bench-scale experiments when hydrogen produced in the fuel reformer is added.
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高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Qixiao Gai,Shoutian Ren,Xiaochun Zheng,Wenjun Liu,Quanli Dong
Surface plasmonic resonance effect of Ag nanoparticles (NPs) can enhance the photocatalytic performance of CdS by the injection rate of hot electrons, but their low injection rate and serious carrier recombination of CdS need special attention. In this article, CdS nanosheets are pre-functionalized by L-cysteine (L-Cys) to graft –COO - and –NH 2 groups, followed by the photo-deposition of Ag NPs, and strong chemical bonds are formed between CdS and Ag NPs with L-Cys as bridging ligands. Their optimal hydrogen evolution rate of 29.71 mmol/g/h is 4.13 and 2.30 times that of CdS and CdS-Ag without L-Cys, respectively, and its monochromatic apparent quantum efficiency at 450 nm reaches 27.87%. According to the enhancement factors of L-Cys functionalization, L-Cys acts as bridging ligands to enhance the interfacial injection rate of hot electrons. Meanwhile, the dangling –COO - and –NH 2 groups on CdS can act as efficient co-catalytic centers.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Wei Wang,Cong Liu,Mutian Zhang,Chenyang Zhang,Lin Cao,Chunfeng Zhang,Tengfei Liu,Debao Kong,Wen Li,Shougang Chen
It is a major challenge to combine the advantages of two kinds of two-dimensional materials to construct a heterojunction and achieve efficient photocatalytic antifouling. In this work, we covalently connected two materials MXenes and covalent organic frameworks (COFs) through the Schiff base reaction and anchored Ag nanoparticles (NPs) to prepare a Ti 3 C 2 /TpPa-1/Ag composite material with high efficiency bactericidal properties. The covalent bonding between MXene and COF greatly improved the stability of the material. Ti 3 C 2 /TpPa-1/Ag composite showed an excellent antibacterial property against S. aureus and P. aeruginosa . The fluorescence spectra of Ti 3 C 2 /TpPa-1/Ag proved that the electron transfer channels formed between the ternary materials could greatly improve the efficiency of carrier separation and prolong the life of photogenerated carriers. Density functional theory calculations showed that the synergistic catalytic effect of Ag and Ti 3 C 2 could greatly reduce the work function along the interface, and the built-in electric field between the layers drive carrier fast migration, which effectively improve the catalytic performance.
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高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Xingwang Lan,Qing Li,Lili Cao,Cheng Du,Luis Ricardez-Sandoval,Guoyi Bai
Fabrication of novel heterogeneous catalysts with well-designed structures is unusually intriguing for CO 2 conversion. In this study, we have prepared a porous hollow N-doped carbon tube through the pyrolysis of self-assembled melamine cyanurate aggregate supramolecular precursor. Ultrasmall Ag nanoparticles were tightly anchored in the hollow N-doped carbon tube via an in-situ fabrication. The average size of Ag nanoparticles was confined in only 2.19 nm with the assistance of abundant surface functional groups and porous structures. Additionally, inherent hollow N-doped carbon tube structure could prevent nanoparticles aggregating and leaching; also, they facilitated gas adsorption and mass transfer in CO 2 catalysis. Due to their remarkable properties, the novel material was utilized as heterogeneous catalyst for the carboxylation of alkynes with CO 2 , and exhibited outstanding catalytic activity and stability at ambient pressure and low temperature.
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高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 46
·23607-23620
·
IF 7.443
Zhifeng Jiang,Deli Jiang,Wei Wei,Zaoxue Yan,Jimin Xie
In this work, we fabricated size-tunable metal (Pd, Ag) nanoparticles grafted on bionic dendritic α-Fe2O3 (M@Fe2O3) through an in situ growth method by using carbon nanodots as a reducing agent followed by a hydrothermal reaction. The size of the supported noble metal nanoparticles can be directly controlled on the surface of dendritic α-Fe2O3 by adjusting the added amount of noble metal salts. The catalytic performances of the resulting M@Fe2O3 hybrid composites were firstly evaluated by reduction of p-nitrophenol. The results indicated that the size of the noble metal nanoparticles had a crucial influence on the catalytic behaviors of the M@Fe2O3. In addition, the dendritic M@Fe2O3 also showed improved photocatalytic efficiencies for visible-light-driven MB degradation due to synergic effects between dendritic α-Fe2O3 and noble metal nanoparticles, including optical properties, unique structure, good dispersion, good charge separation and the SPR effect. The M@Fe2O3 composites have good reproducibility and are highly stable for p-nitrophenol reduction/degradation of MB. Our strategy can be extended to a general strategy for the formation of other novel composites consisting of a 3D hierarchical metal oxide and noble metal nanoparticles with tailorable size (e.g., Pt@TiO2, Pd@MnO2, Au@ZnO and Ag@Cu2O) for broad applications in water treatment.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 24
·10953-10967
·
IF 4.682
Yang Jie,Li Jia,Yang Ping,Xing Ningning,Chen Yaming,Zuo Min,Li TingTing
Micromotors have gained considerable attention in the field of environmental remediation owing to their self-propulsion motion that can efficiently accelerate the mass transfer and mixing in solution. Herein, we reported a novel Ag/Mg(Ni)Al-layered double hydroxide (LDH) Janus micromotor derived from lotus pollen for dynamic removal of organic pollutant from water. The as-prepared three-dimensional (3D) flower-sphere micromotor was composed of free-standing Mg(Ni)Al-LDH nanosheets half-deposited with Ag nanoparticles. Under the recoil force caused by the oxygen bubbles those were generated via the decomposition of H 2 O 2 catalyzed by Ag nanoparticles, Ag/Mg(Ni)Al-LDHs micromotors could move rapidly with a speed of 115.4 ± 10.3 μm s −1 (≈ 2.2 body lengths s −1 ) in 5 wt% H 2 O 2 . Furthermore, the maximum Congo red (CR) adsorption capacity of Ag/MgAl-LDH micromotor was up to 350.16 mg g −1 , which was 1.33 times greater than the MgAl-LDHs (non-micromotor). Meanwhile, the adsorption rate was significantly accelerated compared to the non-micromotor counterparts. The results show that the enhanced adsorption capacity of micromotor benefited from the combination of 3D porous microstructure with high surface area (209.7 m 2 g −1 ), electrostatic attraction and self-propelled movement. Graphical abstract
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高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Yahui Zhang,Xia Huang,Jiachang Chen,Jiyuan Li,Shen Zhou,Junying Chen
Quantitative analysis of harmful patina components on the surface of bronzeware is crucial as patina can corrode artifacts. Surface-enhanced Raman spectroscopy (SERS) has a common application in surface analysis. However, there exists an absence of documented investigations concerning the quantitative analysis of detrimental patina, particularly the chloride patina. To achieve high sensitivity in targeting harmful patina, we report a fabrication method for constructing Ag/Au alloys in the pores and on the surface of UiO-66 (zirconium 1,4-dicarboxybenzene metal–organic framework) nanomaterials, resulting in Ag/Au/UiO-66 nanoparticle monolayers formed by self-assembly at the oil–water interface. By incorporating them onto the surface of PVA hydrogel, we obtained SERS sensor devices with excellent flexibility, outstanding optical transparency, and ultrahigh activity. These sensor devices efficiently sample irregular surfaces and detect micrometer-scale specimen. They significantly enhance the Raman characteristic peaks of measured objects, facilitating precise analysis of the patina composition on the surface of bronze artifacts. The Raman peak at 118 cm–1 was boosted from 367 to 11,909 for detecting harmful patina, and the enhancement factor of the SERS substrate was calculated to be 3.6 ×1010 for detecting the Raman peak of rhodamine 6G (R6G), which could be easily detected at 610 cm–1 at a concentration of 10–13 mol/L (M). The Raman peaks at 610 cm–1 from the SERS substrate could also be readily detected. By grafting the organic fluorescent group amino-MQAE onto the surface of Ag/Au/UiO-66 nanoparticles (NPs), the content of harmful patina on the surface of bronze artifacts treated for different durations was indirectly determined. These results indicate the successful construction of the Ag/Au alloy on the surface of UiO-66 NPs, resulting in SERS sensor devices with excellent flexibility, optical transparency, and ultrahigh sensitivity.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Zixin Xie,Xihong Zu,Qianwei Lai,Yicheng Cao,Xueqing Qiu
Hydrogen production by biomass electrolysis offers a promising and sustainable route for producing green hydrogen and high-value utilization of biomass. However, this process consumes electricity and suffers from low anode Faraday efficiency of the organic electro-oxidation reaction. Herein, we develop a novel strategy that integrates a room-temperature, high-power lignin-derived aldehyde flow fuel cell (FFC) with hydrogen production, which converts the power-consuming electrocatalytic hydrogen production step into an electricity-generating process. The highly active Ag-Cu x O/CF (copper foam) electrocatalyst exhibits dual functionality of efficient electricity generation and simultaneous hydrogen production by catalyzing low-potential aldehyde group oxidation at the anode, which concurrently releases electrons and generates hydrogen. The Ag-Cu x O/CF electrocatalyst can significantly improve the electron transfer rate and catalytic conversion efficiency of the anode, attributable to its mixed Cu 0 /Cu + valence states, enlarged double-layer capacitance (C dl ), reduced interfacial resistance, and optimized adsorption capacity. The Ag-Cu x O/CF catalyst achieves ∼95 % benzaldehyde conversion and ∼98.4 % Faradaic efficiency for hydrogen production at 0.35 V RHE . Furthermore, the FFC based on Ag-Cu x O/CF electrocatalyst demonstrated excellent dual-functionality at room temperature, achieving both a power density of 173.5 mW cm −2 and a hydrogen production rate of 1.96 mmol cm −2 h −1 . The constructed FFC achieved a room-temperature power density threefold greater than the reported lignin-based power generation technology, while maintaining comparable hydrogen production rate to biomass electrolysis processes. This study provides a novel approach to reduce the cost of green hydrogen production and mitigate the global energy crisis.
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高影响因子
危险品化学品经营许可证（带存储）