LANGMUIR
·
2023
·
IF 3.9
Lei Tang,Tongchang Wang,Zhixiang Zeng
Materials require specific surface structures to achieve the best performance, but achieving an optimal structural design requires a systematic study of how structure affects performance. In this work, we comprehensively and systematically investigated the structure–activity relationship between the nanowire structure and the oil dewetting self-cleaning performance. It is easy for an oil droplet to enter this structure, but it is difficult for it to escape from the gaps between the structures even under the action of water. So, the oil dewetting ability is greatly reduced, showing that this “easy to enter and difficult to exit” mode is very disadvantageous for oil desorption. Moreover, if the structure is dissolved during the test, the oil dewetting ability will be restored. The desorption effect is affected by structural parameters and reaction conditions, which further verifies the negative effect of this structure. In contrast, copper(II) oxide nanowires completely lose their self-cleaning ability due to the enhancement of hydrophobicity and oleophilicity, and the larger-diameter copper(II) oxalate nanorods exhibit a “difficult to enter and difficult to exit” mode, leading to the partial recovery of the oil dewetting performance. This study helps us deeply understand the influence of the surface microstructure on the oil dewetting performance and lay a solid foundation for further appropriate structural design.
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Boxuan Yao,Ke Zhang,Xiaoyang Liu,Hua Wei,Zihan Li,Jiarui Zhou,Guangfei Yuan,Xin Wang,Shenghong Yang,Jian Liu
Pursuing special negatively charged adsorbents is critical to selectively removing cationic pollutants from effluent. Herein, we proposed a versatile preparation strategy of negatively charged saccharide-based polymers using easily available saccharides as building blocks and hexachlorocyclotriphosphazene as a linker in a facile “one-step” method. Because of the existence of numerous hydroxyl groups and phosphine nitrile units in the skeleton, these polymers show selective adsorption capacity towards cationic dyes and pharmaceuticals, but not for ionic dyes and uncharged bisphenol A. Notably, β-cyclodextrin-based polymers (β-CDPs) displayed remarkable adsorption towards methylene blue (Q m , 1563 mg g −1 ) and promethazine (Q m , 944 mg g −1 ). Systematic experiments revealed that the synergy of “host-guest” inclusion, electrostatic attraction, and π-π interaction promoted the selective and efficient adsorption of cationic pollutants. Given the efficiently selective adsorption of cationic dyes and pharmaceuticals, these negatively charged saccharide-based polymers should be candidates for the adsorption of other cationic pollutants, including heavy metal ions. This work expanded the scope of the special utilization of biomass-based adsorbents for water remediation.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Yuxuan Hu,Jialin Wen,Dan Li,Yuting Li,Muidh Alheshibri,Minmin Zhang,Lingling Shui,Na Li
In this work, a novel “turn-on” fluorescence sensor for the detection of H 2 O 2 and glucose was developed based on green fluorescent carbon dots (CDs). The CDs was newly prepared by a facile one-pot hydrothermal method with Eosin Y and branched polyethylenimine as precursors. Interestingly, in the presence of H 2 O 2 and HRP, the fluorescence of the CDs enhanced significantly with a red-shift emission due to their “aggregation”. Meanwhile, the oxidation of glucose catalyzed by glucose oxidase could generate H 2 O 2 . Thus, a simple sensing system based on the CDs as fluorescent probes was constructed for H 2 O 2 and glucose determination, avoiding the fluorescence quenching and subsequent recovery process in conventional turn-on strategy. The method showed good selectivity and sensitivity for glucose sensing with the detection limit of 0.12 μM. The method was further applied to glucose detection in real samples. The obtained results demonstrated the simplicity, selectivity and practicality of the method. This work expands the carbon nanomaterials with fluorescence emission enhancement properties. It provides a new and direct “turn-on” strategy for H 2 O 2 and glucose detection, which could be a simple and effective tool for screening biological substances involved in H 2 O 2 -generation reaction.
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DYES AND PIGMENTS
·
2023
·
IF 4.5
Yuanyuan Li,Haowen Li,Tiancong Wang,Gang Liu,Gang Wang,Miaomiao Liu,Li Pan,Juan He,Kai Li
Rhodamine 6G (Rh6G) is a classic dye that has been banned as a food additive due to its harm to human bodies. The illegal addition of Rh6G in foods should be strictly monitored. In this study, a surface-molecularly imprinted fluorescence sensor (TPP-SMIPs) for Rh6G detection was prepared on SiO 2 using an aggregation-induced emission molecule as a fluorescence signal part. TPP-SMIPs exhibited ratiometric response to Rh6G. Favorable linearity between the fluorescence intensity ratios and Rh6G was obtained in the range of 0–10.0 μmol/L. Better site accessibility and higher mass transfer rate were achieved in TPP-SMIPs than in non-surface imprinted polymers. High sensitivity with a low detection limit (2.82 nmol/L) and excellent selectivity were also realized in TPP-SMIPs. Its applications in real sample detection showed satisfactory recoveries and relative standard deviations. This study demonstrated that this sensor can provide fast, sensitive and selective determination to Rh6G in real samples. This work not only reported a new detection method for rhodamine dyes, but also provided a universal strategy for the design of high-performance molecularly imprinted fluorescence sensors.
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AUSTRALIAN JOURNAL OF CHEMISTRY
·
2023
·Vol. 76
·期 9
·615-630
·
IF 1.1
Zhangkun Ren,Lipei Fu,Xinxin Qiu,Wenzheng Chen,Wenzhe Si,Qianli Ma,Minglu Shao,Lifeng Chen,Menglin Wang,Kaili Liao
As a new type of flooding technology, the application of nano-surfactant fluids in the petroleum industry has received much attention in recent years. Stability of the nanofluids, which requires the nanoparticles to remain dispersed in the base fluid during flowing in porous media, is vital for enhanced oil recovery (EOR). In this paper, the feasibility of using amphoteric surfactants to promote the dispersion stability of TiO2 nanoparticles in aqueous solution for EOR was investigated for the first time. The dispersion effects of four major classes of surfactants (cationic, anionic, non-ionic, and amphoteric) on TiO2 nanoparticles were compared. When the ultrasonication time was 10 min, the concentration of TiO2 nanoparticles and surfactant was 0.002 and 0.1 wt%, respectively, and the amphoteric surfactant disodium cocoamphodiacetate (CAD) had better dispersion stability for TiO2 nanoparticles compared with other surfactants. The Zeta potential of the CAD/TiO2 dispersion system was −47.53 mV, and the average particle size was 40 nm. Moreover, a nanofluid flooding system of CDEA-CAD/TiO2, with good dispersion stability and remarkable oil displacement performance, was constructed by compounding CAD with the non-ionic surfactant alkanolamide (CDEA). In the core flooding test, the CDEA-CAD/TiO2 nanofluid effectively enhanced oil recovery by 13.3%, which was mainly attributed to the outstanding wettability reversal, interfacial and emulsifying properties of the nanofluid. This study would help further supplement the research on the dispersibility of TiO2 nanoparticles and construct an efficient nanofluid flooding system to enhance oil recovery.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Quanhua Deng,Min Han,Haiping Li,Guoan Wang,Wenxuan Hu,Lei Feng,Wanguo Hou
The photoexcited charge separation efficiency of photocatalysts is generally considered as the key factor for enhancement of their photocatalytic activity, and sometimes, their photoabsorption capability and interfacial reaction kinetics play a key part, but the role of interfacial affinity of photocatalysts with substrates was rarely researched systematically. Herein, nitrogen vacancy-modified polymeric carbon nitride porous nanotubes (PCNpts) were simply synthesized, using tartaric acid as a crosslinking and corrosion agent, and exhibit a remarkable increment in surface area, wettability, photoabsorption and charge separation capability, and photocatalytic activity in water splitting to produce H2, but, interestingly, exhibit substrate-dependent variation of photoactivity in contaminant degradation, compared with bulk PCN. More interestingly, the interfacial affinity of PCNpts and PCN with contaminants and H2O, rather than photoabsorption and charge separation capability, is confirmed to dominate their photoactivity.
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IMMUNOPHARMACOLOGY AND IMMUNOTOXICOLOGY
·
2023
·
IF 3.3
Xiulian Zhang,Xueliang Li,Wei Ma,Fangying Liu,Pinxian Huang,Lei Wei,Li Li,Yechang Qian
Background Chronic obstructive pulmonary disease (COPD) has a high fatality rate and poses a great threat to human health. Astragaloside IV (AS-IV) is proven to attenuate cigarette smoke (CS)-induced pulmonary inflammation, based on which this research focuses on the mechanism of AS-IV in COPD.Methods To evaluate the effects of AS-IV, CD4+ T cells received different concentrations of AS-IV. CD4+ T cell viability, T helper 17 (Th17)/regulatory T (Treg) markers and CXCR4 expressions in CD4+ T cells or spleen/lung tissues were detected by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide assay, quantitative real-time polymerase chain reaction and Western blot. The proportions of Treg and Th17 cells were assessed by flow cytometry. Enzyme-linked immune sorbent assay was employed to determine cytokine contents in serum and lung tissues.Results AS-IV with concentration exceeding 40 µM inhibited CD4+ T cell viability. In vitro, AS-IV suppressed the expressions of CXCR4, retinoid-related orphan receptor γt (RORγt), and interleukin (IL)-17A as well as Th17 cells but promoted the expressions of forkhead box p3 (Foxp3) and IL-10 as well as Treg cells, while CXCR4 overexpression reversed the effects of AS-IV. In vivo, AS-IV alleviated COPD, and CS-induced Th17/Treg imbalance in mice and reduced CS-induced down-regulation of IL-10 in serum and lung tissues and Foxp3 and up-regulation of IL-1β, tumor necrosis factor alpha (TNF-α), IL-6, and IL-17A in serum and lung tissues and RORγt. AS-IV mitigated CS-induced CXCR4 up-regulation. Above effects of AS-IV on mice were offset by CXCR4 overexpression.Conclusions AS-IV restores Th17/Treg balance via impeding CXCR4 to ameliorate COPD.
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OPTICAL FIBER TECHNOLOGY
·
2023
·
IF 2.7
Yaxun Zhang,Jinjian Yu,Piliang Liu,Chen Liu,Xiaoyun Tang,Zhihai Liu,Yu Zhang,Libo Yuan
The ability to monitor temperature and humidity simultaneously is critical for biomedical and industrial production. We demonstrate a novel temperature and humidity optical fiber sensor based on a photopolymer and polydimethylsiloxane for dealing with temperature cross-sensitivity problem. The low-frequency signal and the high-frequency signal in the interference spectrum were obtained by filtering. Due to structural and material properties, the low-frequency signal is only temperature dependent, while the high-frequency signal is affected by temperature and humidity. Temperature and humidity signals rely on different interferometric mechanisms for measurement to achieve negligible crosstalk . The sensor exhibits a high temperature sensitivity of 1.88 nm/°C by measuring the shift of an interference dip wavelength in the low-frequency signal. The humidity sensitivity is up to 0.282 nm/%RH due to the excellent water absorption capacity of the photopolymer. High accuracy, good repeatability, and stability enable the sensor to measure ambient temperature and humidity. We believe the sensor has excellent potential in environmental monitoring, biomedicine, and human–machine interface.
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ChemistrySelect
·
2023
·Vol. 8
·期 25
·e202301308
·
IF 2.1
Ruyi Wang,Yuhui Zhang,Shichun Gu,Jing Shen,Xue Wang,Yapeng He
Graphical The unique amino functionalized hollow mesoporous silica nanospheres are successfully synthesized via novel one-step dual-template synthetic approach and display excellent selective adsorption for anionic dye molecules. Monodisperse hollow mesoporous silica nanospheres with large cavity (62 nm) in the inner core, small mesopores in the outer shell, and high specific surface area of 373 m 2 /g are successfully synthesized via one-step dual-template synthetic approach utilizing dodecyl sulfobetaine and sodium dodecyl benzenesulfonate as double templates. The architectures including particles sizes, outer shell thickness, and hollow structure could be effective regulated by simple adjusting the volume proportion of alcohols in the solution. Besides, the functions of alcohols in determining the critical micelle concentration and polarity of the synthesis system are elaborated. Owing to introduction of amino active sites in the outer shell, the prepared hollow mesoporous silica nanospheres deliver high loading capacity and favorable selectivity towards anionic dye molecules. The maximum uptake amount for methyl orange and eosin Y reaches as high as 359 mg/g and 332 mg/g, respectively.
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TOXICOLOGY LETTERS
·
2023
·
IF 3.5
Wei Chen,Haotian Yu,Chengbiao Sun,Mingxin Dong,Na Zhao,Yan Wang,Kaikai Yu,Jianxu Zhang,Na Xu,Wensen Liu
γ-bungarotoxin (γ-BGT) is an RGD motif-containing protein, derived from the venom of Bungarus multicinctus , leading to acute death in mice. These RGD motif-containing proteins from snake venom belonging to the disintegrin family can interfere with vascular endothelial homeostasis by directly binding cell surface integrins . Targeting integrins that generate vascular endothelial dysfunction may contribute to γ-BGT poisoning, however, the underlying mechanisms have not been investigated in detail. In this study, the results showed that γ-BGT played a role in -promoting the permeability of the vascular endothelial barrier. Depending on its selective binding to integrin α5 in vascular endothelium (VE), γ-BGT initiated downstream events, including focal adhesion kinase dephosphorylation and cytoskeleton remodeling, resulting in the intercellular junction interruption. Those alternations facilitated paracellular permeability of VE and barrier dysfunction. Proteomics profiling identified that as a downstream effector of the integrin α5 / FAK signaling pathway cyclin D1 partially mediated the cellular structural changes and barrier dysfunction. Furthermore, VE-released plasminogen activator urokinase and platelet-derived growth factor D could serve as potential diagnostic biomarkers for γ-BGT-induced vascular endothelial dysfunction. Our results indicate the mechanisms through which γ-BGT as a novel disintegrin directly interacts with the VE, with consequences for barrier dysfunction.
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Acta Biomaterialia
·
2023
·
IF 9.7
Xingliang Liu,Shi Chen,Lixin Liu,Yongming Chen
Abnormally high level of cell-free DNA (cfDNA) is one of the important causes of autoimmune diseases, which aggravate the symptoms of rheumatoid arthritis (RA). Recently, the utilization of cationic polymeric nanoparticles for scavenging cfDNA has emerged as a promising therapeutic strategy for the treatment of RA. However, the intravenous introduction of cationic polymeric nanoparticles into the circulation carries a risk of dissociation, causing toxicity. To realize the potential clinical translation, we employed a series of silica particles grafted with poly(2-(dimethylamino) ethyl methacrylate) (PDMA) (SiNP@PDMA) brush, which possess adjustable PDMA content (100, 200, and 300 degree of polymerization (DP)) and particle size (50, 100, and 200 nm diameter), to selectively scavenge cfDNA in inflamed joint cavity. We demonstrate that the binding affinity for cfDNA, cytotoxicity, circulation time in vivo and retention in the inflamed joint cavity are influenced by the core-shell structure of SiNP@PDMA, ultimately impacting therapeutic efficacy. Among them, SiNP@PDMA with 100 nm size and 200 DP of PDMA exhibit enhanced accumulation and prolonged retention time in inflammatory joint cavity, resulting in superior therapeutic effect. Therefore, in this study, applying the precisely tuning size and cation content of SiNP@PDMA, we demonstrated the factors to matter the therapeutic effect of cationic nanoparticles, which deepened the understanding of the anti-inflammatory therapies based on cfDNA scavenger for RA. Statement of significance Inspired by the discovery that cfDNA would induce inappropriate immune responses to exacerbate the progress of RA, we innovatively employed SiNP@PDMA as a cfDNA scavenger to inhibit cfDNA-induced inflammation in RA. Increase in the cation content efficiently strengthened the binding between SiNP@PDMA and cfDNA, leading to an improvement in inhibitory effect of inflammation. In addition, we compared the behaviors of 50, 100 and 200 nm SiNP@PDMA in RA symptom suppression, local cfDNA scavenging and inflammation inhibition. The results demonstrated that SiNP 100 -PDMA 200 outperformed other analogues, corresponding to their more favorable distribution in inflammatory articular cavity. Together, this study revealed the structure-property relationship of cfDNA scavengers for further development of safe and effective cfDNA scavenging system.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Yan Shang,Jing Xu,Yue Ma,Zezhong Li,Qian Li
Photocatalytic hydrogen production was a potential strategy to solve energy shortage and environmental pollution. One of the valuable research directions for improving photocatalytic efficiency was to prepare catalysts in an efficient and low-cost way. Lamellar Sm 2 WO 6 and dodecahedron Zeolitic Imidazolate Framework-67 (ZIF-67) have been prepared successfully based on morphology control. Sm 2 WO 6 /ZIF-67 was prepared by a novel in situ growth scheme, which was confirmed by crystal structure, morphology and elemental composition analysis . The close interaction between Sm 2 WO 6 and ZIF-67 was confirmed by photoelectrochemical measurements. Based on the design of band structure , the S-type heterojunction was constructed. The research results of this paper provided a reference for exploring non-noble metal composite materials and demonstrated great potential in photocatalytic.
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