Lubricants
·
2023
·Vol. 11
·期 7
·280
·
IF 3.5
Yiping Sun,Cheng Jiang,Qin Zhao,Xiaobo Wang,Wenjing Lou
The content of Cu2+in lubricants is an essential indicator for determining the quality of the lubricant and predicting mechanical failure. Finding an effective and sensitive method for detecting Cu2+in lubricants is of great importance in oil monitoring. In this work, AgInS2(AIS) and AgInS2-ZnS (ZAIS) nanoparticles (NPs) were synthesized by a simple one-step approach via in-situ surface modification by oleylamine. The as-synthesized AIS and ZAIS NPs exhibit good dispersion stability in various apolar media. The photoluminescence (PL) of AIS and ZAIS NPs as lubricating additives could reflect and monitor the lubrication state of steel-copper pairs due to the quenching effect of Cu2+from the friction process. With an optimum concentration of 0.5 wt% in paraffin oil, the friction coefficient of the AIS and ZAIS NPs at 100 N was decreased by 56.8 and 52.1% for steel-steel contacts, respectively. ZAIS was observed to be more effective than AIS in improving anti-wear (AW) and extreme pressure (EP) properties, with a load-bearing capacity of up to 1100 N. Characterization of the wear tracks by SEM and XPS indicates that a tribofilm composed of metal sulfides and oxides was formed during the lubricating process. This work not only reveals AIS and ZAIS NPs as a new class of promising candidates for lubricating additives but also unveils their potential for monitoring lubricant conditions and exploring lubricant service life.Keywords:AgInS2;AgInS2-ZnS;lubricant additive;friction and wear;photoluminescence
研究领域:
材料科学
·
机械工程
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 24
·22284-22296
·
IF 2.22
Lv Xuehua,Lan Hai,Guo Jie,Guo Meixian,Yan Ya
AgInS 2 and Au-loaded AgInS 2 (denoted as Au/AgInS 2 ) were prepared by one-pot method with thioacetamide as sulfur source and mercaptoacetic acid as stabilizer. The structure, morphology, and optical properties of the obtained samples were characterized by XRD, XPS, BET, HRTEM, DLS, PL, and UV–vis-DRS. The photocatalytic activities of AgInS 2 and Au/AgInS 2 for the degradation of Rhodamine B (RhB) and 4-Nitrophenol (4-NP) under visible light irradiation were investigated, and the optimal proportions of Au introduced on AgInS 2 for the degradation of RhB and 4-NP were obtained. The possible degradation mechanisms of 4-NP by AgInS 2 and Au/AgInS 2 were proposed based on the active species trapping experiment, optical properties characterization, and the flat potential determination. The results showed that Au was successfully introduced on the surface of AgInS 2 nanoparticles, and the photocatalytic degradation efficiencies of Au/AgInS 2 toward RhB and 4-NP were higher than those of AgInS 2 . 5%Au/AgInS 2 was the optimal proportion for the degradation of RhB, and the degradation efficiency could reach 98% in 30 min, while 7.5%Au/AgInS 2 was the best proportion for the degradation of 4-NP, and the degradation efficiency could reach 100% in 30 min. The enhanced visible light photocatalytic performances of Au/AgInS 2 could be attributed to the stronger visible light absorption and the lower recombination probability of photogenerated electron–hole pairs. Active species trapping experiment suggested that the main active species was superoxide radical (·O 2 − ) for the degradation of RhB by Au/AgInS 2 , while for the degradation of 4-NP, the main active species were superoxide radical (·O 2 − ) and hydroxyl radical (·OH).
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Hao Yu,Minghao Dou,Shuang Wang,Yuye Cheng,Zhiqiang Li,Hongyu Shao,Mengjie Yao,Xinrui Wang,Yanyan Chen,Shenjie Li
Although quantum dots (QDs) have unique properties that are different from conventional semiconductors, their photocatalytic activity and stability are far from expectations, and the preparation of semiconductor composites has become an important means to improve their photocatalytic hydrogen production performance. A convenient and safe coordination-assisted self-assembly method was used to encapsulate QDs into metal–organic frameworks and further formed AgInS2@ZIF-8/ZnS nanostructures by converting part of ZIF-8 into ZnS composite materials, which enhanced their photocatalytic hydrogen production performance and cycling stability. The results show that AgInS2@ZIF-8/ZnS nanocomposites have the highest photocatalytic activity (the average hydrogen production reaches 9.79 mmol·g–1·h–1; λ > 420 nm) after 6 h of sulfurization, which is far greater than that of AgInS2 QDs. Compared with the AgInS2@ZIF-8 composite, their performance is improved by nearly 10 times. In conclusion, a simple, safe, and easily-controllable method is used to prepare a novel and efficient photocatalytic material, which provides a new idea about the rational design of novel QD photocatalytic composites.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2015
·
IF 2.999
Xin Wang,Cuiping Xie,Jiasong Zhong,Xiaojuan Liang,Weidong Xiang
Highly luminescent AgInS 2 –ZnS quantum dots were obtained by a one-pot two steps hot injection approach. The effect of the reaction time on the properties of the quantum dot was systematically investigated. By the introduction of Zn ions , the emission peak was blue-shift from 638 nm to 584 nm in 15 min, while the emission peaks of the obtained AgInS 2 –ZnS quantum dots were tuned in a narrow range with a bit red-shift from 584 to 589 nm as the reaction was continued. The highest photoluminescence quantum yield (PL QY) was up to about 72% when the reaction was prolonged to 15 min. Further, results showed that the morphologies were varied as the reaction was continued. In addition, the PL decay curves demonstrated that the component of PL bands resulted from Zn doping was observed, while the PL behavior was originated from the donor-acceptor recombination.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Jie Wu,Jinhua Li,Mingming Cheng,Li Li,Ruhong Yan,Juan Yue
Calcium ions (Ca 2+ ) are key players in intracellular signaling as second messengers and play a pivotal role in various physiological processes. In this study, near-infrared water-soluble AgInS 2 quantum dots (AIS QDs) for Ca 2+ detection were synthesized by a one-step hydrothermal method. The fluorescence quantum yield (PL QY) of the quantum dots was as high as 23.99 %. With low cytotoxicity and good fluorescence properties, as well as short reaction time, the ternary AIS QDs have excellent synthesis efficiency and quantum yield, which are advantageous for Ca 2+ detection and bioimaging applications. The fluorescence quenching of the quantum dots showed a clear linear relationship with calcium ion concentration in the range of 0–250 μM (detection limit: 0.65 μM). Confocal imaging experiments demonstrate the excellent biofluorescence imaging capability of AIS QDs. By tuning the Ag/In molar ratio, AIS QDs can achieve fluorescence emission in the near-infrared wavelength band (620–700 nm), and the near-infrared fluorescence imaging has deeper tissue penetration, less tissue absorption and photodamage, and lower interference of spontaneous fluorescence, which further expands the potential of QDs for bioimaging applications.
研究领域:
生物化学
·
医学影像
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材料科学
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产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 30
·305704
·
IF 3.551
Hong Li,Weizhe Song,Xingqiang Cui,Yanhui Li,Baorong Hou,Xiaoping Zhang,Yuqi Wang,Lianjun Cheng,Pengfei Zhang,Junru Li
AgInS2 nanoparticle and graphene nanosheet co-sensitized anatase TiO2 nanotube array films were fabricated by a combination of hydrothermal reaction and electrochemical anodization on titanium sheets. The results showed that the co-sensitization of AgInS2 nanoparticles and graphene nanosheets extended the photoresponse of TiO2 nanotubes into the visible-light region, and improved the photogenerated charge separation and transfer capability. The photocurrent density of the AgInS2/graphene/TiO2 composites (about 4.0 mA cm−2) was 20 times that of bare TiO2 (only 0.2 mA cm−2) under visible-light illumination. The potential negative shift value of AgInS2/graphene/TiO2 composites was up to 0.68 V versus saturated calomel electrode. The AgInS2/graphene/TiO2 composites can provide Q235 carbon steel with highly efficient photocathodic protection under visible-light illumination.
研究领域:
材料科学
·
电化学
·
腐蚀防护
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Lanlan Zhang,Qi Wang,Yuhong He,Shihao Han,Xiaolu Wang,Yangfang Liao,Qingping Dai,Bing Lv,Wenzhong Wang
In this study, we present a promising CeO 2 /AgInS 2 heterostructure photoanode for photoelectrochemical (PEC) water decomposition. Mott-Schottky analysis is employed to confirm the formation of a type-II heterostructure between AgInS 2 nanoparticles and CeO 2 nanosheet arrays (NSAs) fabricated through electrochemical deposition and successive ionic layer adsorption and reaction. Electrochemical impedance spectroscopy, photoluminescence analysis, and Bode diagram spectroscopy confirm the effective charge carrier separation and significantly prolonged the charge lifetime of the CeO 2 /AgInS 2 heterojunction photoanode. Consequently, the maximum photocurrent density of the constructed CeO 2 /AgInS 2 photoanode relative to Ag/AgCl under zero bias test conditions is 69.8 times higher than the pure CeO 2 NSAs. Additionally, the charge transfer mechanism is further verified by the calculated work function and differential charge density of CeO 2 /AgInS 2 heterojunction. This study provides a valuable reference for the synthesis and preparation of heterojunction photoanode for efficient PEC water decomposition.
研究领域:
材料科学
·
能源科学
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产品关联
DOI
高影响因子
Discover Oncology
·
2025
·Vol. 16
·期 1
·1-10
·
IF 2.9
Gong Qineng,Zhu Tianyu,Zhang Linlin,Wu Hui,Miao Yang,Hu Ye
Hepatocellular carcinoma (HCC) is a predominant form of liver cancer and one of the leading causes of cancer-related death globally. Therefore, there is an urgent need for innovative therapeutic strategies that target the molecular mechanisms underlying HCC progression and metastasis, aiming to improve treatment efficacy and patient survival. The natural product celastrol (Cel) has demonstrated inhibitory effects in various cancer cell lines. However, its clinical application has been hindered by high toxicity and a low safety threshold. Metal-free quantum dots (QDs), AgInS 2 (AIS QDs) not only eliminate toxic risks associated with heavy metals but also exhibit high biocompatibility in the biomedical field. By developing AIS QD@Cel, an AIS QDs nano-delivery system for Cel, the cell selectivity and inhibitory effects of Cel on HCC were enhanced. Fourier-transform infrared spectroscopy (FTIR) analysis revealed that AIS QDs can interact with Cel via amide bonds. The encapsulation rate of AIS QDs to Cel reached 27.5%. AIS QD@Cel eliminated toxicity on 293T and enhanced inhibition on HCC cells by over 10 times. Furthermore, the western blotting and flow cytometry experiments showed that AIS QD@Cel promoted apoptosis and autophagy signal pathway. Finally, transcriptome sequencing revealed that AIS QD@Cel effect on HCC by regulating gene expression involved in critical signaling pathways that are implicated in the progression of cancer. This strategy holds the potential to increase safety threshold and clinical applicability of Cel, offering significant clinical value for the treatment of HCC patients.
研究领域:
肿瘤学
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药理学
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纳米医学
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2021
·Vol. 413
·期 8
·2207-2215
·
IF 4.157
Yin Min,Wang Yan,Gao Xuwen,Du Shichao,Cheng Yan,Yu Shuai,Zou Guizheng,Xue Fumin
We developed a near-infrared (NIR) electrochemiluminescence (ECL) immunosensor for sensitively and selectively determining carbohydrate antigen 125 (CA125) with toxic-element-free and environmental-friendly AgInS 2 /ZnS nanocrystals (NCs) as tags. The core/shell-structured AgInS 2 /ZnS NCs not only can be conveniently prepared via an aqueous synthetic procedure, but also has high photoluminescence quantum yield (PLQY) of up to 61.7%, highly monodispersed, water-soluble, and desired biological compatibility. As AgInS 2 /ZnS NCs can be oxidized via electrochemically injecting holes into their valence band at + 0.84 V, both the monodispersed AgInS 2 /ZnS NCs in solution and the surface-confined AgInS 2 /ZnS NCs immobilized in sandwich-typed immuno-complexes with CA125 as analyte can exhibit efficient oxidative-reduction ECL around 695 nm under physiological conditions with the presence of tri-n-propylamine (TPrA). The ECL intensity from the AgInS 2 /ZnS NCs immobilized in sandwich-typed immuno-complexes increases linearly and selectively with an increased concentration of CA125 from 5 × 10 −6 to 5 × 10 −3 U/mL, and limit of detection (LOD) was 1 × 10 −6 U/mL (S/ N = 3). This reliable platform can provide an effective detection method in the early diagnosis and treatment of ovarian cancer. Graphical abstract
研究领域:
生物医学工程
·
免疫分析
·
纳米材料科学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 25
·8515-8520
·
IF 7.059
Qian Xiong,Jinlong Yang,Huaiyi Ding,Juan Du,Xiaosheng Tang,Tongchao Shi,Zhengzheng Liu,Daofu Wu,Hao Lin,Yuxin Leng
Recently, solution-processed conventional I–III–VI2 quantum dots (QDs) demonstrated a potential optical amplification application based on superior optical properties. Nonetheless, exploiting the potential of this type of material as a gain medium for optical amplification devices is still scarce, rendering application prospect restricted. Herein, for the first time, we report the amplified spontaneous emission (ASE) action using AgInS2 (AIS) QDs as the gain medium. ASE with an ultra-low threshold (31.58 μW cm−2) was demonstrated by combining highly reflective distributed Bragg reflectors (DBR) with AIS QDs. Furthermore, the relationship between the number of layers of the DBR mirrors and the ASE performance is systematically discussed, indicating that the seven-layer DBR is a desirable device structure with the best ASE from AIS QDs. These consequences unambiguously uncover the significant feasibility of the traditional AIS QDs as a photonic resource, simultaneously demonstrating the huge potential and promising applications of as-designed devices for optical amplification.
研究领域:
材料科学
·
光子学
·
纳米技术
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Suiying Dong,Ying Yang,Amir Zada,Shu-yuan Liu,Kezhen Qi
AgInS 2 quantum dots and ZnS photocatalytic materials were prepared using low temperature liquid phase and solvothermal methods, followed by the formation of their composites (AgInS 2 /ZnS) of different proportions with the aid of grinding method. The catalysts were characterized by various morphological and structural analyses such as scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), ultraviolet-visible diffuse reflectance spectroscopy (UV-DRS) and fluorescence spectroscopy (PL), etc. The experimental results show that the optical characteristics of ZnS can be improved by loading AgInS 2 . To evaluate the performance of the catalysts, tetracycline was selected as the target toxin, and its degradation was evaluated with AgInS 2 /ZnS materials. The results show that when the amount of AgInS 2 was 5%, AgInS 2 /ZnS exhibited the most excellent degradation performance. Under the irradiation of the simulated solar light, the catalyst removed 46% of tetracycline (40 mg·L −1 ) in 120 min. Compared with the bare ZnS, the degradation rate of AgInS 2 /ZnS composite was significantly improved. The mechanism of tetracycline degradation by composites was verified through the experiments of energy band structure analysis, active species capture, photocurrent and electrochemical impedance and photoluminescence. The effects of pH and common interfering ions on the degradation of the antibiotic were also explored. The ecological risk of the photocatalytic degradation of tetracycline by composites was predicted. Generally speaking, the prepared AgInS 2 /ZnS material showed excellent photocatalytic degradation performance, and it is a new catalyst with great potential.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Zongbo Zhang,Kai Wang,Changbin Xu,Yu Zhang,Wenting Wu,Changhe Lu,Wengang Liu,Yunlong Rao,Chen Jiang,Chunling Xu,Shiliang Song
Droplet microreactors are powerful tools for synthesizing chemicals, nano materials and biomolecules, but traditional methods, such as mechanical stirring, are hard to enhance the internal mass transfer of droplet microreactor due to its small reaction space. In this study, we propose a novel ultrasonic-enhancing method for droplet microreactor, and report the effect of bubbles inside micro-droplets for the first time. On this basis, the synthesis of AgInS 2 nanocrystals is selected as model reaction to study the enhancement mechanism. It is discovered that the flow field in micro-droplet is significantly improved owing to acoustic streaming and cavitation microstreaming. Benefiting from them, the mass transfer coefficient is enhanced by 72.5 %, and AgInS 2 nanocrystals are successfully synthesized with smaller, more uniform particle size, as well as more adjustable performance compared with no ultrasonic radiation condition. This work provides a new method and a deep insight of ultrasound enhancing droplet microreactor, enabling the continuous production of fine chemical synthesis.
研究领域:
化学工程
·
纳米材料科学
·
生物技术
✓ 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）