CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Ming Li,Siqi Zhang,Panpan Zhang,Kexin Qin,Bo Xu,Jin Zhou,Chungang Yuan,Qianyong Cao,Huining Xiao
A new cellulose-based material as adsorbent was prepared for Hg (II) detection and removal from aqueous solution. Rhodamine moiety was conjugated with cellulose as an efficient sensor, enabling the material to exhibit excellent optical signals on the contact with Hg (II). Fourier transform infrared spectra, elemental analysis, thermogravimetry, differential thermal analysis, scanning electron microscope analysis, Brunauer-Emmett-Teller surface area, pore volume and pore size were employed to verify the modification of cellulose. A 7-fold enhancement of fluorescence intensity afforded the adsorbent “off–on” fluorimetric response exclusively towards Hg (II) without the interference of more than ten other kinds of metal ions. The detection limit reached as low as 9.18 × 10 -7 M. Besides, the adsorbent also showed an obvious color change during the adsorption to realize “naked-eye” recognition with Hg (II) in the range of 1–400 ppm. Thus, a colorimetric card was prepared to evaluate the concentration of Hg (II) in a convenient and rapid manner. In addition, the adsorption properties of the material including the effect of initial concentration, pH, and contact time were systematically investigated by batch adsorptions. The adsorption process was found to fit well with Langmuir adsorption model and pseudo-second-order kinetics. The mercury triggered spirolactam ring-opening reaction was responsible for the sensitive and selective fluormetric sensing and confirmed by the Job’s plot (1:1 binding stoichiometry) and X-ray photoelectron spectroscopy. Furthermore, density functional theory studies also indicated the energetically favorable Hg (II) induced ring-opening process. The highly sensitive and selective performance in tap water further demonstrated the tremendous potential of as-prepared adsorbent for practical application.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2021
·
IF 5.279
Qian Wang,Hualin Wang,Tingting Zhang,Zheng Hu,Li Xia,Linlin Li,Junfeng Chen,Shaotong Jiang
Nowadays, films with antibacterial activity and applied for freshness monitoring by colorimetric response have been drawing growing attention in food packaging. However, the development of versatile antibacterial and colorimetric agents is still highly desirable. Herein, WO3 nanorods are incorporated in a polyvinyl alcohol (PVA) matrix to develop a novel composite film with photothermal antibacterial activity and freshness monitoring faculty. The interaction between WO3 nanorods and PVA is due to hydrogen bonds. Compared with the PVA film, the presence of WO3 nanorods can significantly enhance the mechanical and barrier properties; typically, the target film (WO3/PVA)4 shows an increase in tensile strength by 52.7% and Young’s modulus by 400.0% and a decrease in oxygen permeability by 72.4% and water vapor permeability by 66.9%. The films demonstrate a WO3 content-dependent antibacterial activity. Under irradiation of near-infrared light (NIR808), the synergistic effect of physical damage, oxidative stress, and temperature increase markedly improves the antibacterial activity of (WO3/PVA)4, showing an antibacterial efficiency of ∼90% against Escherichia coli or beyond 90% against Staphylococcus aureus. The incorporated WO3 nanorods demonstrate lower cytotoxicity toward the model cells of human colon cancer cell line HT-29. The (WO3/PVA)4 film exhibits colorimetric response to H2S and can also be used for pork freshness monitoring as an indicator.
研究领域:
材料科学
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食品科学
·
生物医学工程
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DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Ningyi Chen,Shuang Wu,Ying Xu,Sijie Lv,Xianhua Wang,Qingrui Zhang,Bingjun Pan
High-resolution identification of chromium (Cr) species, especially various organic-Cr complexes, in a convenient and economically-feasible manner is the prerequisite for achieving the advanced treatment of chromium wastewater. To this end, a colorimetric nano-Au sensor array was developed by taking advantage of the UV-spectra shift of gold nanoparticles (Au NPs) upon interaction with Cr species; specifically, four molecular modifiers [i.e., iminodiacetic acid (IDA), tripolyphosphate (TPP), cetyltrimethylammonium bromide (CTAB), and 1,5-diphenylcarbazide (DPC)] were intentionally employed for assembling nano-Au array receptors, which showed respective responses toward different Cr species through the formation of coordination, hydrophobic interaction, electrostatic attraction, and redox reaction , respectively; the “fingerprint” differences of the unique optical properties were then integrated for semi-quantitatively recognizing Cr species by pattern recognition techniques. Eleven ubiquitous Cr species [i.e., Cr(III), Cr(VI), and various Cr(III)-organic complexes] served as the model samples, which could be sensitively identified, no matter in individual or mixture mode, by the developed nano-Au sensor array on the basis of the colorimetric responses resulted from diverse nano-Au-aggregation behaviors, with excellent anti-interference ability in the simulated or actual water scenario. Attractively, the nano-Au sensor array can achieve very sensitive detection limit of the quantitative analyses of Cr species in a prompt in-situ manner, which usually requires a two-step process of separation and detection for the conventional analytical methods. Such a convenient strategy of Cr species discrimination conduces to rationally designing specific protocols for the advanced treatment of chromium wastewater.
研究领域:
环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2016
·
IF 4.758
Chen-hui Ji,Jun-jie Li,Chang-jun Hou,Dan-qun Huo,Mei Yang,Liang Zhang
High-performance measurement and removal of copper ions is highly desirable in both clinical and environmental applications. Herein, an efficient, reliable and recyclable functional material was prepared to adsorb and determine Cu 2+ using N -[3-(trimethoxysilyl) propyl] ethylenediamine modified mesoporous hollow shells (HMS-NHs). By stepwise coating with mesoporous silica at highly mono-dispersed PS spheres, removal of template materials, and modification with functional diamine groups, higher absorption capacity of about 138.58 mg/g was obtained. After optimization of PS template size, thickness of SiO 2 layers, pore size of the shell, and etc, as-prepared HMS-NHs gave clear colorimetric response after color development using cupron solution. Selectively measure Cu 2+ in a wide concentration ranges from 0.025 to 49 μΜ was observed with a detection limit around 0.025 μΜ (3δ). More importantly, the functional absorbent can be regenerated by treatment with hydrochloric acid and maintains high efficiency upon repeated use for at least 10 times. Extensive investigation demonstrated that the HMS-NHs can serve as not only high-performance absorption materials but also sensitive sensor for Cu 2+ , thus offering a good alternative for potential removal and detection of copper ions in real applications.
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
ANALYTICA CHIMICA ACTA
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2017
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IF 4.95
Datong Wu,Qiuhong Yin,Pengfei Cai,Xiaoyong Zhao,Yuanjiang Pan
Novel task-specific ionic liquids derived from (S)-phenyl amino acid were prepared as a chiral sensor for the first time. It was found that the ionic liquids exhibited different chiral visual responses to the enantiomers . When (S)-tryptophan was treated with the sensor and Cu(II) in water, the clear solution would change to a sapphire suspension. Differently, another enantiomer could not produce the precipitate. Furthermore, the enantiomers could generate different colors in DMSO under the same conditions. The substantial difference contributes to the easy discrimination with visual determination. Four racemates were successfully tested with this strategy. The precipitation was isolated in the range of 90–94% yields after complete formation of the coordinative bonds, which could be as a simple way for enantioseparation. The responsive mechanism of the sensor was studied by NMR spectroscopy , FTIR and SEM . UV-vis spectrophotometer was used to monitor the colorimetric signal of the racemate with different e.e. values.
研究领域:
分析化学
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有机化学
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超分子化学
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药物化学
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化学生物学
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材料科学
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分子识别
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 25
·10025-10029
·
IF 3.069
Xinrong Shi,Fangjun Huo,Jianbin Chao,Yongbin Zhang,Caixia Yin
The role of hydrazine in production is not to be underestimated due to its strong reducibility. However, every coin has two sides. Hydrazine represents a great hazard to the environment, which cannot be ignored. Aiming to prevent harm to people or the environment, a new near-infrared fluorescent probe is presented. This probe is specifically designed to sense hydrazine vapor accumulated in an enclosed space and detect excessive hydrazine in water samples. It shows good selectivity and a turn-on effect, as well as a remarkable color change that can be distinguished by the naked eye. This effect has been utilized for quantitative detection in real water samples. Moreover, the color change of the probe adsorbed on filter paper can be observed by the naked eye to monitor the presence of hydrazine in the air in real time; this property of the probe is expected to be used for hydrazine detection in industrial environments.
研究领域:
分析化学
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环境科学
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生物传感
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分子诊断
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工业安全监测
✓ 已验证
DOI
高影响因子
Carbon Letters
·
2024
·Vol. 34
·期 4
·1155-1164
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IF 5.5
Zhang Mengxue,Yin Hongna,Wan Libin,Gao Haidong,Liu Song,Liu Yeru
Heavy metal ions pollution has become of worldwide critical concern, thus, it is particularly important to monitor it in the environment and food for ensuring human health. In this study, p-phenylenediamine and 2-mercaptothiazoline were used to prepare nitrogen (N) and sulfur (S) co-doped carbon dots (N/SCDs) for fluorescent and colorimetric detection of Cu 2+ . The fabricated N/SCDs with bright green fluorescence showed excellent optical characteristics and favorable water solubility. In an aqueous system, a significant fluorescence quenching of N/SCDs at 512 nm is obtained in the presence of Cu 2+ . It also caused a significant colorimetric response with the color of prepared N/SCDs solution changed from colorless to yellow. Under optimal conditions, the analytical results showed that the linear range spanning from 5 to 400 μM, with a detection limit of 0.215 μM in fluorescence and 0.225 μM in colorimetric detection. In addition, N/SCDs displayed high selectivity toward Cu 2+ . No obvious interference was observed over other metal ions. Furthermore, we have also used N/SCDs to monitor Cu 2+ in tap and lake water. The recovery of Cu 2+ ranged between 89.6% and 113.1%. Exhibiting remarkable sensitivity and selectivity, the designed sensor offers a promising detection method for Cu 2+ detection in the real sample.
研究领域:
环境科学
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分析化学
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材料科学
✓ 已验证
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Yingran Xu,Kai Wang,Pan Liu,Zheng Wang,Wenya Liu,Zan Yang,Wanqi Jiang,Yibin Zhou,Mingming Zheng,Yaqing Xiao,Yingnan Liu
In this study, the polyvinylpyrrolidone-alizarin nanoparticles (PVP-AZ NPs) with favorable water dispersion and the carbon quantum dots (RQDs) with aggregate induced emission effect were synthesized to construct an eco-friendly film for food freshness monitoring. The introduction of PVP-AZ NPs and RQDs enhanced the network structure and thermal stability of the cassava starch/polyvinyl alcohol film, and reduced its crystallinity and light transmittance via non-covalent binding with the film-forming matrix. The developed film exhibited visually recognizable colorimetric and fluorescent responses to ammonia at 0.025–25 mg/mL, and it can be reused at least 6 times. Practical application experiment proved that the film, as an indicator label, can achieve accurate, real-time, and visual dynamic monitoring of the freshness of shrimp stored at 25 °C, 4 °C, and − 20 °C under daylight (orange yellow to purple) and UV light (red to blue). The integration of multivariate detection technology can eliminate the interference of external factors by self-correction to improve sensitivity and reliability, which provides a reference for the development of other food quality and safety monitoring platforms.
研究领域:
食品科学
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材料科学
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纳米技术
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传感器与执行器
✓ 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）