JOURNAL OF HAZARDOUS MATERIALS
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2017
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IF 6.065
Yi He,Li Wang
Here we report a label-free method for visual colorimetric detection of hexahydro-1,3,5-trinitro-1,3,5-triazine (HTT) explosive based on base-driven sunlight oxidation of silver nanoprisms (AgNPRs). Under natural sunlight illumination, the surface plasmon of AgNPRs is excited, which populates O 2 antibonding orbitals to generate negative-ion state (O 2 − ). The resultant O 2 − with a strong oxidation activity can etch AgNPRs to smaller nanodisks with the aid of NaOH aqueous solution, leading to a blue shift of the absorption peak and color change from blue to pink. However, when HTT is introduced, the resultant O 2 − will be consumed by the nitrite and formaldehyde that are produced from the alkaline hydrolysis of HTT. Under this condition, the etching of AgNPRs does not occur, and the detection solution remains blue. This assay can sensitively detect as low as 1 nM HTT, a level which is three orders of magnitude lower than that of gold nanoparticle-based colorimetric assays (2.6 μM), and shows linearity in the range of 0.003–3.3 μM. The lowest detectable concentration with the naked eye is 0.1 μM. Additionally, the present assay exhibits good selectivity, and can be applied in the detection of HTT in natural water and soil samples with recoveries ranging from 90% to 100%.
研究领域:
分析化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
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2020
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IF 4.049
Zhenkun Mao,Zhentao Li,Changjun Hu,Yikun Liu,Zhi Cao,Zilin Chen
An innovative strong hydrophilic organic polymer monolithic column of poly(N-benzylquininium chloride- co -1, 3, 5-triacryloylhexahydro-1, 3, 5-triazine) (poly(NBQ- co -TAT)) has been successfully synthesized through in situ copolymerization for capillary electrochromatography. The amphiphilic monomer NBQ and the strong polar cross-linker TAT are firstly used in hydrophilic electrochromatography by taking advantage of the exhibition of hydrophilicity at lower levels of organic solvent and ease formation of porous structure. The monolithic column poly(NBQ- co -TAT) shows powerful hydrophilic selectivity with mobile phase containing more than 60% organic solvent. The introduction of NBQ and TAT enlarges the sources of functional monomers and cross-linkers for HILIC. Due to the presence of the positively charged group in NBQ, an anodic electroosmotic flow is generated with the change of pH values from 2.0 to 12.0. The monolithic column was used for the separations of thioureas, phenols, xanthines, nucleobases, acidic substances and pharmaceuticals. The highest column efficiency for N, N′-dimethylthiourea is 1.15 × 10 5 N m −1 . The application of the monolithic column for a real sample, cytochrome C digestion indicates its great potential in practical application.
研究领域:
分析化学
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药学
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电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
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2020
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IF 4.049
Zhenkun Mao,Zhentao Li,Changjun Hu,Yikun Liu,Qiaoyan Li,Zilin Chen
Abscract Allylglycine, a conventional amino acid derivative, possesses typical zwitterionic and hydrophilic functionalities deriving from the carboxyl and amino groups in its structure. A novel monolithic column poly(allylglycine- co -1, 3, 5-triacryloylhexahydro-1, 3, 5-triazine) (AGly- co -TAT) with powerful hydrophilic selectivity and obvious zwitterionic feature was synthesized successfully with the monomer allyglycine and the cross-linker 1, 3, 5-triacryloylhexahydro-1, 3, 5-triazine through in-situ copolymerization for capillary electrochromatography. The obtained monolithic column has good permeability. Due to the zwitterionic functional groups of allylglycine, the poly(AGly- co -TAT) monolithic column can generate a cathodic and anodic electroosmotic flow (EOF) by changing the mobile phase pH, which is beneficial to expand its application range. The separations of different series of polar analytes, thioureas, xanthines, phenols, peptides and acidic compounds are achieved on this hydrophilic monolithic column due to the powerful hydrophilic, electrostatic and hydrogen bond interactions. Using this monolithic column, hydrophilic separations are achieved even at a lower level of 50% organic solvent. The separation efficiency up to 1.41 × 10 5 N m −1 and 1.19 × 10 5 N m −1 is achieved for the separation of theophylline and phenol, respectively. For a real sample, cytochrome C digestion, the monolithic column shows good separation performance, which offers the potential application of the monolithic column on proteomics study.
研究领域:
分析化学
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分离科学
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毛细管电泳
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聚合物化学
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生物化学
✓ 已验证
DOI
高影响因子
Journal of Cleaner Production
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2023
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IF 11.1
Dongyu Hao,Xuechuan Wang,Ouyang Yue,Shuang Liang,Zhongxue Bai,Jin Yang,Xinhua Liu,Xugang Dang
Organic chrome-free tanning agents are an important part of the sustainable development in leather manufacturing industry. However, organic chrome-free tanning agents tanned leather have a low isoelectric point (pI < 5), which results in a low absorptivity of traditional anionic wet finishing materials; as a result, leather quality is poor, and tannery wastewater is difficult to treat. In addition, leather is easily eroded by bacteria and mold during its production, storage, and use, causing serious economic loss to enterprises and users. In this study, hexahydro-1,3,5-tris(hydroxyethyl)-s-triazine (HHTT), ethylene glycol glycidyl ether (EGDE), and collagen polypeptide (CP) were used as raw materials to prepare a wrench-like, antimicrobial, amphoteric, epoxy-terminated, organic chrome-free tanning agent (HHTT-EGDE-CP) with a pI of 5.21, and an epoxy value of 0.267 mol/100 g. HHTT-EHDE-CP can establish a stable covalent cross-linking with collagen fibers, thereby enhancing the physicochemical properties of leather, the absorptivity of anionic wet finishing materials, giving leather long-term and efficient antibacterial properties . Experimental results show, that the shrinkage temperature (78.8 °C) and the absorptivity of anionic fatliquors (93.1%) and dyes (97.5%) of HHTT-EGDE-CP-tanned leather surpassed those of leather tanned using commercial organic chrome-free tanning agents. Notably, the inhibition rates of HHTT-EGDE-CP-tanned leather against E. coli and S. aureus reached 99.93% and 99.99%, respectively. In addition, HHTT-EGDE-CP-tanned leather exhibited excellent inhibition against A. flavus and Asp. niger, with long-term and efficient antibacterial properties. This innovative technique offers new perspectives for designing and developing multifunctional green materials toward the sustainable development of industrial manufacturing.
研究领域:
材料科学
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化学
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皮革制造
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可持续发展
✓ 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）