Journal of Materials Chemistry C
·
2014
·Vol. 2
·期 24
·4812-4817
·
IF 0
Jianbing Zhang,Weipeng Sun,Liping Yin,Xiangshui Miao,Daoli Zhang
A green method for the one-pot direct synthesis of hydrophilic CuInS2 and CuInS2–ZnS colloidal quantum dots was developed employing N,N-dimethylformamide (DMF) as a solvent. Highly reactive H2S gas, in situ generated from the reaction between FeS and H2SO4, was utilized as the sulphur source for the synthesis of hydrophilic CuInS2 quantum dots. Short chain thiols were applied as ligands, reactivity controllers and sulphur sources for the growth of the ZnS shell. The growth of CuInS2 quantum dots experiences a typical Ostwald ripening process, and it should be controlled in 45 min due to the pyrolysis of the ligands. The reaction temperature should not exceed 130 °C. The ZnS shell was grown on CuInS2 quantum dots in a very simple and one-pot approach. Both the luminescence and optical stability were improved substantially after the formation of the ZnS shell. The versatility of this synthetic strategy was demonstrated by extending it to the synthesis of other metal sulphide quantum dots, for instance, CdS and ZnS quantum dots.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2022
·Vol. 39
·期 7
·1839-1849
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IF 3.146
Zhang Xiaoting,Zhang Shusheng,Ouyang Gangfeng,Han Runping
A zirconium-based metal organic framework (UiO-66-NH 2 ) was prepared using a greener approach for the removal of hexavalent chromium (Cr(VI)) from solution. The characterization of UiO-66-NH 2 was performed using several methods, and the influence of the solution pH, adsorbent dosage, salt, adsorption time, Cr(VI) concentration and adsorption temperature on adsorption quantity was performed in batch mode. UiO-66-NH 2 can efficiently remove Cr(VI) through the synergistic effect of adsorption and reduction. At pH solution of 1.1 and solid-to-liquid ratio of 2 g·L −1 , the removal rate of 100 mg·L −1 Cr(VI) increased to 95.2%. The maximum adsorption capacity of UiO-66-NH 2 from Langmuir model was 252 mg·g −1 . The adsorption equilibrium process can be well described by Langmuir, Koble-Corrigan and Temkin models, while the kinetic process can be predicted by pseudo-second-order and Elovich model. UiO-66-NH 2 showed a good adsorption capacity in a wide range of pH (pH=1.1–10) and also had better regeneration performance after five cycles using 0.01 mol·L −1 NaOH; consequently, it can be a promising adsorbent for the removal of Cr(VI) from solution.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Xiang Mao,Xia Zhao,Hao Hu,Zequan Li,Wei Xiong,Yujiao Wei,Wei Gao
Work to combat counterfeiting has always been crucial to defending the interests of the public. The usual anti-counterfeiting marks are now fundamental and easy to imitate. Therefore, it is more beneficial to anti-counterfeiting work to develop an anti-counterfeiting mark with more variations to make forgery more difficult. Due to its exceptional stability and fluorescence variability, carbon dots (CDs), a newly developed fluorescent material, offer a wide range of potential applications in anti-counterfeiting. However, there currently needs to be more CD applications in multi-level anti-counterfeiting, and additional issues include high cost and environmental contamination. Therefore, considering the problems of green environmental protection and cost, CDs with excellent green (530 nm) and blue (475 nm, 486 nm) luminescence properties were prepared by a one-step reaction of m-phenylenediamine and glucose. The average fluorescence lifespan is longer than 5 ns, and the optimal quantum yield can reach 37%. Due to the large number of protonated amino groups and surface carboxyl functional groups, the prepared carbon dots exhibit green and blue fluorescence emission modes under acidic and alkaline conditions, respectively. Based on this situation, we produced CD ink and successfully used it for multi-level anti-counterfeiting.
研究领域:
材料科学
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化学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ORGANOMETALLIC CHEMISTRY
·
2025
·
IF 2.4
Ke Yang,Sisi Cheng,Shijia Li,Kun Zhu,Ziqin Yao
The influencing factors of ZIF-8 synthesis were systematically investigated by the green synthesis method and the samples were also compared with ZIF-8 synthesized in other ways, and an optimal synthesis route was found by exploring the synthesis conditions. On this basis, the synthesis mechanism of ZIF-8 was analyzed. The research results show that the key influencing factors in the reaction process are the amount of NaOH and the pH value of the system. Different amounts of NaOH will produce different intermediates, and these intermediates further affect the pH value of the entire reaction system. The pH value of the system plays a decisive role in the deprotonation process of the ligand in the reaction, and this process is the key to whether the ZIF-8 structure can be formed. It is worth mentioning that the ZIF - 8 synthesized in this study demonstrates varying removal performances for different dyes under different conditions. Under specific conditions, it exhibits the maximum removal rate for Rhodamine B (RhB), reaching 99.97 %. This excellent removal performance is closely associated with the pore - structure characteristics of the synthesized material, which fully indicates that the ZIF - 8 synthesized through the green route has certain application potential and promising application prospects in related fields.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2019
·
IF 0
Qin Dai,He Zhao,Hongbin Cao,Yiqiu Wu,Zhi Sun,Xiaofei Meng,Tianyu Wang,Guangfei Yu,Jingyi Lin,Rong Hou
The green and low-cost preparation of carbon dots (CDs) with excellent fluorescence plays a key role in cell-imaging applications. Herein, we develop a green photochemical approach for fabricating CDs. The produced CDs can be used directly in lung cancer A549 cell imaging without any tedious post-treatments. As nontoxic and green alternatives to prevent pollution, fatty acids in sole aqueous media are the only reactants used to synthesize CDs. Furthermore, the green process of photoirradiation avoids harsh conditions, such as strong acids and bases, strong oxidants, and high temperatures and pressures. In addition, the by-products remaining in the aqueous environment are fatty acid dimers in the form of vesicles, which can also be recycled as gemini surfactant resources. We demonstrate that this green synthetic method for fabricating CDs is suitable for fatty acids with different chain lengths, and therefore, exhibits considerable universality. Fatty acids, as readily available green resources in nature, and the green and simple synthesis method without additional pollution provides a new approach and perspective for the green synthesis of CDs for bioimaging.
研究领域:
生物医学
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材料科学
✓ 已验证
产品关联
DOI
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2022
·Vol. 128
·期 4
·1-10
·
IF 2.983
Zhang Hongding,Wu Sifei,Xing Zhenhua,Gao Man,Sun Mengwei,Wang Jiaoyu,Wang Hai-Bo
Main conclusion Carbon dots (CDs) have attracted more and more attention due to their low toxicity, good biocompatibility and easy preparation. However, synthesis of CDs with high quantum yield using green and economic method is still challenging. Herein, an effective synthesis route was reported for green synthesizing CDs using waste chicken eggshell membrane as carbon source via microwave-assisted method. The obtained CDs showed good photo-stability with a high quantum yield of 19.5%. The as-prepared CDs was designed as a fluorescent probe for facile, rapid, sensitive determination of theophylline (TP) based on the fluorescence turn on–off strategy. The designed method exhibited good performance for the determination of TP. Under the optimal conditions, the fluorescent response of CDs was proportional to the TP concentrations in the range of 0.1–1 and 1–1000 μM with limit of detection of 28 nM. Moreover, the proposed method was applied to detect the TP content in tea samples. The as-prepared CDs provide a green and economic approach for the food safety test. Graphical abstract Eggshell membrane-derived carbon nanodots for direct and rapid detection of theophylline.
研究领域:
分析化学
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食品安全检测
·
纳米材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
·
2021
·Vol. 19
·期 1
·1-17
·
IF 10.435
Fouad Hatem,Yang Guiying,El-Sayed Ahmed A.,Mao Guofeng,Khalafallah Diab,Saad Mahmoud,Ga’al Hassan,Ibrahim Ezzeldin,Mo Jianchu
Background Despite developments in nanotechnology for use in the pharmaceutical field, there is still a need for implementation of this technology in agrochemistry. In this study, silver nanoparticles (AgNPs) were successfully prepared by a facile and an eco-friendly route using two different ligands, 2ʹ-amino-1,1ʹ:4ʹ,1″-terphenyl-3,3″,5,5″-tetracarboxylic acid (H4L) and 1,3,6,8-tetrakis (p-benzoic acid)-pyrene (TBAPy), as reducing agents. The physiochemical properties of the as-obtained AgNPs were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), X-ray diffraction (XRD) and transmission electron microscopy (TEM). The toxicity of H4L–AgNP and TBAPy–AgNP against the brown planthopper (BPH, Nilaparvata lugens) was also measured.Results SEM and TEM analyses demonstrated the formation of quasi-spherical AgNP structures in the presence of H4L and TBAPy. Insecticidal assays showed that TBAPy is less effective against N. lugens, with a median lethal concentration (LC50) of 810 mg/L, while the toxicity of H4L increased and their LC50 reached 786 mg/L 168 h posttreatment at a high concentration of 2000 mg/L. H4L–AgNPs were also highly toxic at a low concentration of 20 mg/L, with LC50 = ~ 3.9 mg/L 168 h posttreatment, while TBAPy–AgNPs exhibited less toxicity at the same concentration, with LC50 = ~ 4.6 mg/L.Conclusion sThese results suggest that the synthesized AgNPs using the two ligands may be a safe and cheaper method compared with chemical insecticides for protection of rice plants from pests and has potential as an effective insecticide in the N. lugens pest management program.
研究领域:
农业科学
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昆虫学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganics
·
2023
·Vol. 11
·期 1
·40
·
IF 2.9
Jiahao Zhang,Yunxue Yin,Shuo Hu,Guangyu Wang,Yuxin Tong,Mingyang Zen,Zhile Liang,Minghao Li,Ran Yan,Yue Wang
The silver nanoparticle is a good antibacterial material being used as a broad-spectrum fungicide, including against some multidrug-resistant strains. Compared with the normal chemical and physical preparation methods, green synthesis has attracted wide attention, because of the pharmaceutical activities of the natural product, mild reaction conditions, and environmentally friendly, etc. In this study, the synthesis of silver nanoparticles (Ag NPs) was prepared fromBletilla striatapolysaccharide (BSP) and characterized by UV-vis spectroscopy and Dynamic Light Scattering (DLS). Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) indicated the morphology of Ag NPs was subspherical with an average size of 20–35 nm.Bletilla striatapolysaccharide not only can be used as a natural reducing agent, but also has good repairing ability. Moreover, the antibacterial experimental results showed its great antimicrobial activity against Gram-positive bacteria (Staphylococcus aureus), Gram-negative bacteria (Escherichia coli) andCandida albicans.Keywords:silver nanoparticles;green synthesis;Bletilla striatapolysaccharide;antibacterial
研究领域:
纳米技术
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药学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Biotechnology Journal
·
2024
·Vol. 19
·期 11
·e202400489
·
IF 3.2
Bo Zhang,Sifang Zhu,Yi Zhu,Xin Sui,Junping Zhou,Zhiqiang Liu,Yuguo Zheng
Boldenone (BD), a protein anabolic hormone, is commonly used to treat muscle damage, osteoporosis, and off-season muscle building in athletes. Traditional BD synthesis methods rely on chemical processes, which are costly and environmentally impactful. Therefore, developing a more sustainable and economical biosynthetic pathway is crucial for BD production. This study aimed to achieve efficient production of BD. Firstly, the catalytic performance of 17β-hydroxysteroid dehydrogenase and 3-ketosteroid-Δ 1 -dehydrogenase was improved through enzyme engineering, and their expression in the new strain of Mycobacterium neoaurum was enhanced using metabolic engineering. These improvements significantly increased BD production to 4.05 g/L, with a significant decrease in by-product generation. To further increase the yield, a multi-enzyme fusion expression system was constructed, and a key cell wall gene kasB was knocked out, resulting in a spatial-time yield of BD reaching 1.02 g/(L·d). Subsequent optimization of the transformation system further increased the BD production to 5.56 g/L, with a spatiotemporal yield of 1.39 g/(L·d). The green biosynthetic route of phytosterol one-step conversion to BD developed in this study lays the foundation for industrial production.
研究领域:
生物化学
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微生物学
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合成生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYST
·
2024
·Vol. 149
·期 24
·5863-5870
·
IF 3.6
Jie Huang,Ruicheng Xu,Qiaoting Yang,Kang Tao,Dan Shan
The purpose of the present study is to develop an easy and effective one-step pyrolytic method for synthesizing carbon dots (CDs) derived from folic acid (FA), denoted herein as FACDs. This method is green, inexpensive, and simplifies the synthesis of fluorescent carbon nanomaterials with enhanced and stable fluorescence. Moreover, the as-prepared FACDs are effective in the sensitive and selective detection of cysteine (Cys) by such a “turn-on” mechanism of fluorescence. FACDs have been able to realize a low detection limit of 1.7 × 10−7 M and a wide linear range from 5.0 × 10−7 to 8.0 × 10−5 M, successfully restoring quenched fluorescence in the presence of Cys. Obtained results confirm FACDs as a trustful high-performance sensor for various biological and environmental applications and pave the way for facile and efficient fluorescence-based detection platforms.
研究领域:
材料科学
·
分析化学
·
生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advances in Materials Science and Engineering
·
2020
·
IF 1.271
Peiyuan Chen,Yonghui Wang,Shicheng He,Pengju Wang,Ying Xu,Liheng Zhang
This study proposes a green, low-cost, and robust method to synthesize spherical calcium hydroxide (CH) nanoparticles based on the co-precipitation of Ca2+ and OH− in the presence of tannic acid (TA), an inexpensive plant-derived polyphenol. It has been found that the morphology and crystalline phase of the produced CH nanoparticles can be controlled by TA. With the increasing dosage of TA, the crystallinity of the CH particles reduces, changing from well crystallization to amorphous phases. Experimental evidence suggests that complexion reaction took place between TA and Ca2+, which gave the Ca2+ a strong bond effect. As a result, the nucleation and growth of CH were significantly affected. CH nanoparticles with sizes of about 50 nm have been successfully synthesized by using 0.3% or more TA.
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
RSC Advances
·
2020
·Vol. 10
·期 2
·784-789
·
IF 3.119
Hongshe Wang,Yichun Wang,Yinfeng Han,Weixing Zhao,Xiaomei Wang
Humic acid is a non toxic, inexpensive, easily available high-molecular weight polymer. A simple and facile one pot three-component synthesis of 5-substituted 1H-tetrazoles from aldehydes, hydroxyamine hydrochloride and sodium azide using humic acid as an efficient catalyst in water is described. The method reported has several advantages such as high to excellent yields, easy work-up, mild reaction conditions, use of water as a green solvent, and a commercially available, nontoxic and reusable catalyst.
研究领域:
有机化学
·
绿色化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）