ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Ce Chen,Lidong Yu,Xueting Li,Zewen Yu,Danjie Song,Siqi Wang,Fangshun Li,Shanshan Jiang,Yajie Chen,Jucai Xu,Jianglin Fan,Bingsheng Li,Li Li
Ultraviolet (UV) exposure causes damage to human skin and mucous membranes, resulting in oxidative stress, and can also lead to inflammation of human skin, skin aging, and even diseases such as squamous cell carcinoma and melanoma of the skin. The main means of protection against UV radiation is physical shielding and the use of sunscreen products. Carbon dots as a novel nanomaterial provide a new option for UV protection. In this article, we introduced sulfhydryl groups to synthesize l-cysteine-derived carbon dots (GLCDs) with UV resistance. GLCDs exhibit high-efficiency and excellent UV absorption, achieving 200–400 nm UV absorption (99% UVC, 97% UVB, and 86% UVA) at a low concentration of 0.5 mg/mL. Meanwhile, GLCDs can reduce apoptosis and UVB-induced oxidative damage, increase collagen type I gene expression, and inhibit skin aging in zebrafish. It also inhibits senescence caused by the senescence inducer 2,2′-azobis(2-methylpropionamidine) dihydrochloride and reduces oxidative damage. The above studies show that GLCDs possess efficient broad-spectrum UV absorption, antiphotoaging, and antiaging capabilities, which will have a broad application prospect in UV protection.
研究领域:
生物材料学
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皮肤病学
·
纳米医学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOILS AND SEDIMENTS
·
2024
·
IF 2.8
Cheng Congcong,Chen Haijun,Xu Nan,Zhang Shan
Purpose The Cr(VI) removal capacity of green synthesized nano-zero-valent iron (GnZVI) using tea polyphenols (TPs) remains limited. To improve their application in contaminated soil and groundwater, the GnZVI was modified. This is necessary for in-situ remediation of heavy metal-contaminated soil and groundwater. Materials and methods The GnZVI-based carbon-composite (L&GnZVI@BC) was successfully constructed via the synergistic effect of L-cysteine modification and biochar support. The Cr(VI) removal capacity and transportability of L&GnZVI@BC were investigated in soil–water system by batch and column experiments. Results and discussion Comparison with two materials of GnZVI separately modified by L-cysteine (L-GnZVI) or supported by biochar (GnZVI@BC)), GnZVI composite with a combination modification of L-cysteine and biochar (L&GnZVI@BC, L-cysteine/biochar/Fe = 0.1/0.1/1) showed a much higher Cr(VI) removal capacity in soil and groundwater. The synergistic effect of the reduction of L-cysteine functional groups and the dispersibility of biochar support can enhance the transportability of L&GnZVI@BC in water-saturated sand media for more Cr(VI) adsorption at neutral pH; while that improved the soluble Fe(II) released from composite for the higher reduction of Cr(VI) into Cr(III) at acidic pH. Particularly, L&GnZVI@BC favored more Cr(III) generation during transport in porous media at lower pH when applied in the treatment of Cr(VI) contamination. Conclusion This research highlights that the modification of both L-cysteine and biochar was beneficial to sufficient transport and efficient remediation in Cr(VI)-contaminated soil and groundwater environments at different pH ranges. This study’s results provide a theoretical support for the practical application of nZVI composites in in-situ remediation of Cr(VI)-contaminated soil and groundwater via an environmental-friendly approach.
研究领域:
环境科学
·
污染修复
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2019
·
IF 2.931
Longhua Ding,Zhongyao Zhao,Dongjun Li,Xue Wang,Jialin Chen
A simple and highly efficient “off-on” fluorescent sensor based on grapheme quantum dots (GQDs) for Cu 2+ was developed. In this sensing platform, the fluorescence of GQDs was quenched in the presence of 2,4-dinitrophenylcysteine (DNPC), which is the reaction product of 1-chloro-2,4-dinitrobenzene (CDNB) and l -cysteine, owing to the spectral overlap between the absorption of DNPC and the excitation of GQDs. In the presence of Cu 2+ , l -cysteine was catalytically oxidized to l -cystine by O 2 , resulting in the reduction of DNPC. Thus, the fluorescence of GQDs was recovery. Based on this, the fluorescent detection of Cu 2+ could be achieved. The proposed sensing strategy offered a selective identification of Cu 2+ with a detection limit of 4.5 nM. Additionally, the practical application of this assay for Cu 2+ determination in real water samples was also demonstrated.
研究领域:
分析化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Yang Wu,Sheng Yang,Feiya Fu,Jingjing Zhang,Jianhua Li,Tingfang Ma,Xiangdong Liu,Juming Yao
In this paper, L-cysteine (Cys) is firstly bonded to the surface of cotton non-woven (CO) fabric as esterification. In this way, Ag + and tannic acid (TA) are adsorbed onto the modified fabric via complexation and hydrogen bond interaction. After a sustainable one-step redox reaction, a Cys modified CO fabric decorated with Ag NPs and TA (CO-Cys-Ag-TA) is prepared. Because of the stabilizing effect of Cys and TA, the synthesized Ag NPs with a mean size of 88.9 nm are uniformly distributed on the modified fabric surface. Through the comparative test, it has been revealed that the antibacterial activity of Ag NPs is improved after loading TA, and the loading of Ag NPs significantly reduces the cytotoxicity of TA. In this context, the bacteriostatic reduction rate of CO-Cys-Ag-TA against S. aureus and E. coli is close to 100%, and its antibacterial activities are greater than 98.5% after 50 washing cycles. Meanwhile, its cell viability value reaches up to 88.0% with the presence of 0.1 mg/mL to 0.8 mg/mL CO-Cys-Ag-TA.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Yiming Zhang,Xiaoyan Yang,Yonglin Wang,Peng Zhang,Dan Liu,Yongwei Li,Zhouzheng Jin,Bhekie B. Mamba,Alex T. Kuvarega,Jianzhou Gui
For obtaining ultra-fine Cu 2 S nanoparticles with reduced recombination of their photogenerated electron/hole pairs, in-situ growth of Cu 2 S nanoparticles on exfoliated MoS 2 nanosheets was achieved in this study. We have exhaustively studied l -cysteine in-situ conjugation with sulfur defects on the surface of MoS 2 nanosheets, which makes particle-level superlattice structured Cu 2 S nanoparticles (average 6.2 nm) well disperse on MoS 2 nanosheets. Further, XPS and Raman analysis confirm that the intense interfacial effects are formed between Cu 2 S and MoS 2 for the 2-Cu 2 S-MoS 2 composite, which significantly promote separation of photogenerated electron-hole pairs and prolong their lifetime, as shown by PL and TRPL. As a result, 2-Cu 2 S-MoS 2 exhibits the fastest photoreduction rate of Cr(VI) (0.0058 min −1 ) under visible light irradiations, which are almost 8.3 times and 2.9 times higher than that of MoS 2 nanosheets (0.0007 min −1 ) and pure Cu 2 S (0.002 min −1 ), respectively. Meanwhile, 2-Cu 2 S-MoS 2 also possesses an optimal composite proportion between Cu 2 S and MoS 2 , which presents outstanding photocatalytic activity among series of x-Cu 2 S-MoS 2 composites. The photoreduction mechanism of Cr(VI) is investigated in detail. As a matter of fact, l -cysteinecoupled with sulfur defects on MoS 2 nanosheets could produce the coordination inner heterojunction interface of 2-Cu 2 S-MoS 2 samples, which greatly improves migration efficiency of photoinduced carriers and ultimately endows it outstanding photoreduction activities. Furthermore, the strategy was extended to fabricate CdS-MoS 2 and ZnS-MoS 2 heterojunctions, implying that this strategy is of promising potentials for designing more active metal sulfides heterojunction photocatalysts.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
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IF 4.9
Qishuang Yang,Chen Huang,Yubo Lian,Zhenyu Chen
N, S- and N-doped carbon quantum dots (CDs) were synthesized by calcination in the presence of L-cysteine and 2-aminobutyric acid by using P-phenylenediamine as the raw material. The CDs were characterized by Fourier transform infrared spectroscopy, transmission electron microscopy, and fluorescence spectroscopy. Results show that both kinds of CDs have spherical structures and particle sizes. The CDs were dispersed in 3.5 wt% NaCl solution and doped into the epoxy coating to prepare the composite coating. The two kinds of CDs have good corrosion inhibition effects in both applications.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
CELLULOSE
·
2024
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IF 4.9
Xiang Shuangfei,Cai Dongrong,Ru Hongfu,Ma Yuchen,Xiao Yuanxiang,Zhao Shujun,Fu Feiya,Liu Xiangdong
The rational design of Ag NP decorated cotton fabrics with durable Joule heating performance has attracted great interest. However, the combination of Ag NPs and cotton fabrics is so weak that it hinders its long-term stability in service. Here, an in situ dual-anchoring strategy is employed to enhance the immobilization of Ag NPs by L-Cysteine and DNA on cotton fabrics. Specifically, DNA plays a role as template for immobilizing Ag NPs, while L-Cysteine acts as a binder between cotton fabrics and DNA. Under the synergistic effect of L-Cysteine and DNA, Ag NPs are firmly anchored on cotton fabrics. The obtained cotton fabric based wearable Joule heaters exhibit low electrical resistance (24 Ω/sq) and long-term stability. Furthermore, the cotton fabric based wearable Joule heaters can be heated up to 60.3℃ at a low driving voltage of 4.5 V, and maintain superior Joule heating performance even after 1000 times of bending fatigue tests. Thus, this work holds great promise for a durable wearable Joule heater. Graphical abstract
研究领域:
材料科学
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纺织工程
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纳米技术
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产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2025
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IF 2.6
Shutao Li,Pengyi Ma,Jinping Song,Xiaoting Guo,Jianhua Xue,Qi Ma
It is the first time to report the synthesis of small-molecule passivated boron quantum dots (BQDs) through a bottom-up strategy using L-cysteine (L-Cys) as a passivation agent and ammonium pentaborate tetrahydrate and boric acid as boron sources under a low reaction temperature of 100 °C. The morphology and surface structure of the prepared BQDs were characterized in detail using high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, and X-ray diffraction. The as-obtained BQDs emitted blue fluorescence with a quantum yield of 1.14%, and the particle sizes are mainly distributed between 1.5 nm and 3.5 nm. Stability research results demonstrated that BQDs possess high stability performance. The findings revealed that BQDs could be used as a fluorescence nanoprobe for developing a fluorescence “turn-off/turn-on” sensing platform to detect the drug molecule sulfasalazine (SSZ) and Pb2+. The proposed sensor indicates high sensitivity and selectivity towards SSZ, and the linear response range is 1–100 μmol L−1 with a detection limit of 0.9 μmol L−1. The quenched fluorescence could be recovered by Pb2+ in the range of 40–180 μmol L−1 with a detection limit of 39.7 μmol L−1. The proposed “turn off-turn on” sensor gives satisfactory results for practical sample analysis. Meanwhile, the thermodynamic data were estimated, and the corresponding quenching mechanisms were also discussed in detail. Moreover, BQDs had low cytotoxicity, which presented a potential application in cell imaging. They can also be used in the construction of LED and fluorescent film.
研究领域:
材料科学
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分析化学
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生物医学工程
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产品关联
DOI
高影响因子
JOURNAL OF FLUORESCENCE
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2019
·Vol. 29
·期 4
·819-825
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IF 1.913
Xu Yin-long,Bai Rong-biao,Qi Cai-yu,Ren Zeng,Jia Xiu-zhi,Kan Zi-gui,Li Cao-long,Wang Fei
Herein, a simple and efficient fluorescence analysis method for L-Cysteine (L-Cys) was established. The method was based on the fluorescent “off-on” mode of nitrogen doped carbon dots (NCDs). The NCDs were prepared via a facile one-step solvothermal method. In the process of exploring the bio-functional application of these newly synthesized NCDs, we found these NCDs with rich functional groups exhibited excellent optical properties. In addition, these newly synthesized NCDs showed an excitation-dependent emissions photolumine-scent (PL) property and exhibited good performance in the detection of Fe 3+ ions by quenching the blue emission fluorescence. Interestingly, the quenched fluorescence of NCDs was recovered with the addition of L-Cys, which provided a novel approach for L-Cys detection. The NCDs-based fluorescent “off-on” sensor has a wide linear detection range (0–100 μM), and a relatively low detection limits (0.35 μ M) for L-Cys. This simple fluorescent “off-on” approach is, very sensitive and selective for L-Cys detection, which also provides a new insight on NCDs biosensor application.
研究领域:
分析化学
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生物传感
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医学检测
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产品关联
DOI
PubMed
高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
Xiao Hui-Jin,Liao Xiao-Jing,Wang Hui,Ren Shu-Wei,Cao Jun-Tao,Liu Yan-Ming
A novel signal-increased photoelectrochemical (PEC) biosensor for l-cysteine (L-Cys) was proposed based on the Bi2MoO6–Bi2S3 heterostructure formed in situ on the indium–tin oxide (ITO) electrode. To fabricate the PEC biosensor, Bi2MoO6 nanoparticles were prepared by a hydrothermal method and coated on a bare ITO electrode. When L-Cys existed, Bi2S3 was formed in situ on the interface of the Bi2MoO6/ITO electrode by a chemical displacement reaction. Under the visible light irradiation, the Bi2MoO6–Bi2S3/ITO electrode exhibited evident enhancement in photocurrent response compared with the Bi2MoO6/ITO electrode, owing to the signal-increased sensing system and the excellent property of the formed Bi2MoO6–Bi2S3 heterostructure such as the widened light absorption range and efficient separation of photo-induced electron–hole pairs. Under the optimal conditions, the sensor for L-Cys detection has a linear range from 5.0 × 10−11 to 1.0 × 10−4 mol L−1 and a detection limit of 5.0 × 10−12 mol L−1. The recoveries ranging from 90.0% to 110.0% for determining L-Cys in human serum samples validated the applicability of the biosensor. This strategy not only provides a method for L-Cys detection but also broadens the application of the PEC bioanalysis based on in situ formation of photoactive materials.
研究领域:
生物传感技术
·
材料科学与工程
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产品关联
DOI
PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Xiaoyuan Duan,Shuaishuai Cheng,Zhiwei Li,Chaobo Liang,Zhiyi Zhang,Guizhe Zhao,Yaqing Liu,Dong An,Zhijian Sun,Chingping Wong
Composites with high thermal conductivity are urgently needed for thermal management devices. Although natural rubber (NR) with excellent elasticity are promising as flexible polymer for thermal management, their poor thermal conductivity limits their applications. In this work, a general water treatment route and an ice template process are used to prepare a 3D graphene aerogel. And environmentally friendly L-cysteine (Cys) are used to adjust the carbon-to-oxygen ratio of GO and thiol-functionalized GO. Benefiting from the 3D graphene network and strong interfacial interaction, the NR composites with graphene loading of 25 wt% showed thermal conductivity of 0.891 W/(m·K). At the same time, it also has good mechanical properties and antistatic properties. All the results indicate that Cys-GO@GNP/NR is expected to be a promising thermal management material.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Xiaochun Zheng,Shoutian Ren,Qixiao Gai,Wenjun Liu,Quanli Dong
Serious interface carrier recombination leads to moderated photocatalytic performance of carbon nitride (C 3 N 4 ), and the realization of their strongly covalent bonding with co-catalysts can efficiently inhibit this. In this article, C 3 N 4 nanosheets are first functionalized with L-cysteine molecules to form C-SH bonds, and then the photodeposited CoP x NPs are covalently bonded with C 3 N 4 with L-cysteine molecules as bridging ligands, which can efficiently reduce the C 3 N 4 /CoP x interface impedance. Their optimal hydrogen evolution rate and apparent quantum efficiency at 420 nm are 4.12 mmolg −1 h −1 and 3.74%, respectively, which are 17.2 and 13.9 times that C 3 N 4 /CoP x reference without L-cysteine bridging ligands, mainly due to the reduced C 3 N 4 /CoP x interface impedance. This work proposes a general solution to inhibit interface carrier recombination in nanocomposites by introduction of bridging ligands.
研究领域:
材料科学
·
光催化
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）