MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Yongfa Cheng,Lingzhi Cheong,Yongyong Li,Yongjiang Lou,Shiqian Fu
The high toxicity and bioaccumulation effects of nitroaromatic pesticides and their serious environmental risks have led to a sharp increase in public concern about pesticide residues. Present work developed a direct, rapid, sensitive and reliable Candida rugosa lipase (CRL)@ the ordered macro-microporous ZIF-8 (MAC-ZIF-8) nanofibers biosensor (CRL@MAC-ZIF-8 nanofibers) for methyl parathion and chlornitrofen residues detection in lake water. The biosensors fabricated by the CRL@MAC-ZIF-8 nanofibers demonstrated wide linear range for both methyl parathion (0.5–114 µM) and chlornitrofen (1–40 µM) detection. The biosensors also demonstrated good reusability for methyl parathion detection with retainment of more than 97% of its initial response after scanning continuously for 100 times. During 1 month storage stability test at 4 °C, the fabricated biosensor demonstrated excellent stability for methyl parathion detection with retainment of 86%-100% of its initial response. Meanwhile, the biosensors also demonstrated good recovery rates when the biosensors were used to detect methyl parathion and chlornitrofen residues in lake water sample.
研究领域:
环境科学
·
生物传感器技术
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Kaixiang Cui,Yong Chen,Keyu Xie,Haonan Peng,Liping Ding,Yu Fang
The integration of metal halide perovskite quantum dots (PQDs) into sensing technologies has been hindered by challenges in balancing environmental stability and sensing sensitivity. In this work, mesoporous silica nanoparticles (MSNs) with tunable pore sizes were employed as nanoconfinement reactors to synthesize size-controlled CsPbBr3 PQDs (3.0–12.0 nm). The nanoconfined environment facilitated the selective growth of pure CsPbBr3 phases, avoiding unwanted Cs4PbBr6 formation. The resulting nanoconfined PQDs, CsPbBr3@MSN, exhibited tunable emission from blue to green (470 to 515 nm), a high quantum yield (36.8%), and enhanced stability. Moreover, the PQD composites demonstrated exceptional performance in detecting the pesticide dicloran, achieving a detection limit of 0.16 μM, far below China’s national standard requirement (34.0 μM). The detection mechanism involved competitive adsorption and phase transitions from the cubic CsPbBr3 phase to the quasi-2D CsPb2Br5 phase. The porous MSN structure maintained efficient mass and energy transfer, ensuring both stability and sensitivity. Beyond sensing, these nanocomposites show potential for applications in anticounterfeiting and fingerprint recognition. This study highlights nanoconfinement as a powerful strategy for developing robust, high-performance PQD-based fluorescent sensors.
研究领域:
材料科学
·
化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SUPERCRITICAL FLUIDS
·
2021
·
IF 4.577
Mingyue Wang,Neveen Mohamed Hashem,Hongjuan Zhao,Jian Wang,Yanfeng Sun,Xiaoqing Xiong,Laijiu Zheng,Mamdouh Sofan,Tarek Abou Elmaaty
The reason of color differences caused by different degree of esterification disperse dyes were investigated by disperse orange 30, disperse red 167:1, disperse blue 79:1 with different degree of esterification. The results showed that the changes of light absorbance abilities and melting points caused by ester groups had no obvious correlation with the color differences caused by ester groups. The changes in the solubilities and affinities caused by the ester groups were the fundamental reason for the changes in the dyeing properties of disperse orange 30, disperse red 167:1 and disperse blue 79:1. As a joint result of the decrease in solubilities and affinities, the dye sorption in polyethylene terephthalate of unesterified disperse orange 30, unesterified disperse red 167:1 and unesterified disperse blue 79:1 were reduced by 37.7%, 83.6% and 54.6%, respectively, compared with those of the corresponding completely esterified dyes.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2024
·
IF 3.9
Pei Xiu,Bai Jinchuan,Li Yaming,Kong Xiangbo
In this paper, a luminescent metal-organic framework Tb 3+ @tartaric acid-functionalized Zr-MOF (Tb 3+ @UiO-67-bpy-TA, TA = tartaric acid) was prepared by post-synthetic modification (PSM) and used as a fluorescence sensor for the detection of the pesticide nitenpyram (NTP). The fluorescence sensing experiment verified that Tb 3+ @UiO-67-bpy-TA had exceptional sensitivity and selectivity for NTP detection, and the detection limit was calculated to be as low as 1.28 µM. The mechanism studies indicated that competitive UV absorption, photoinduced electron transfer (PET) and dynamic quenching contributed to the fluorescence quenching process. In addition, the detection of NTP in tap water and Yellow River water samples by the Tb 3+ @UiO-67-bpy-TA were also investigated using standard addition method, and satisfactory recoveries were achieved.
研究领域:
材料科学
·
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2016
·
IF 5.267
Min Li,Wujun Ma,Liping Zhang,Christiana Agbo,Shaohai Fu
Five disperse dyes (D1–D5) with 2,6-bichlor-4-nitroaniline or 2-chloro-4-nitroaniline as the diazo component and N-substituted anilines as the coupling component were designed and synthesized in order to compare the differences derived from their molecular structure. All the synthesized disperse dyes were characterized by FT-IR, 1H NMR, and elemental analysis. Their spectral property was evaluated with respect to visible absorption properties in various solvents of distinguishable polarity. The synthesized disperse dyes were applied on one-step dyeing of polyethylene terephthalate (PET) fabric. The alkali stability of the dyes in case of one-step dyeing at various NaOH concentrations was discussed by comparing color parameters of the dyed PET fabrics. Besides, the alkali stability of the dyes was investigated with respect to the nature of chemical constitution and the substituents therein by X-ray crystal diffraction analysis. The results show that D4 and D5 have excellent alkali stability and can combine pretreatment and dyeing in an alkali bath, which could be attributed to the head-to-tail compact structure, intramolecular and intermolecular forces and large sterically hindered group (−CH2–Ph). The levelness and color fastness as well as mechanical properties of the dyed PET fabrics with a one-step dyeing method were measured by an ISO standard method.
研究领域:
化学工程
·
材料科学
·
纺织科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Yuang Zhang,Gagik G. Gurzadyan,Malik Muhammad Umair,Wentao Wang,Rongwen Lu,Shufen Zhang,Bingtao Tang
Thermoelectric battery is effective in converting thermoelectricity based on Seebeck effect. As an all-solid-state energy conversion model, this battery is highly significant in improving the utilization of solar energy using a clean and noiseless process. However, efficient photothermal conversion and temperature difference control are the key challenges in enhancing solar-thermal-electric conversion. Herein, we constructed a novel sunlight-driven thermoelectric system with temperature difference control characteristic. In which the light-driven phase change heat storage material (PCHSM) was used as the hot side, and the phase change cool storage material (PCCSM) as the cold side. Ultrafast photothermal conversion of the PCHSM was achieved through the nonradiative decay of the excited state, which was revealed by means of femtosecond transient absorption technique. Solar radiation was efficiently utilized as shown by the excellent visible light absorption, ultrafast photothermal transformation, and phase change heat storage characteristics of the PCHSM. The PCCSM with high phase change cool storage performance could provide enough cold energy to maintain the cold-side temperature. Temperature gradient was controlled using the cold-side and hot-side materials based on the phase-change temperature control characteristics.
研究领域:
能源科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2021
·Vol. 27
·期 1
·126
·
IF 4.412
Zhuojun Yan,Jinni Liu,Congke Miao,Pinjie Su,Guiyue Zheng,Bo Cui,Tongfei Geng,Jiating Fan,Zhiyi Yu,Naishun Bu,Ye Yuan,Lixin Xia
Eating vegetables with pesticide residues over a long period of time causes serious adverse effects on the human body, such as acute poisoning, chronic poisoning, and endocrine system interference. To achieve the goal of a healthy society, it is an urgent issue to find a simple and effective method to detect organic pesticides. In this work, two fluorescent porous organic polymers, LNU-45 and LNU-47 (abbreviation for Liaoning University), were prepared using π-conjugated dibromopyrene monomer and boronic acid compounds as building units through a Suzuki coupling reaction. Due to the large π-electron delocalization effect, the resulting polymers revealed enhanced fluorescence performance. Significantly, in sharp contrast with the planar π-conjugated polymer framework (LNU-47), the distorted conjugated structure (LNU-45) shows a higher specific surface area and provides a broad interface for analyte interaction, which is helpful to achieve rapid response and detection sensitivity. LNU-45 exhibits strong fluorescence emission at 469 nm after excitation at 365 nm in THF solution, providing strong evidence for its suitability as a luminescent chemosensor for organic pesticides. The fluorescence quenching coefficients of LNU-45 for trifluralin and dicloran were 5710 and 12,000 (LNU-47 sample by ca. 1.98 and 3.38 times), respectively. Therefore, LNU-45 serves as an effective “real-time” sensor for the detection of trifluralin and dicloran with high sensitivity and selectivity.Keywords:porous organic polymers;pesticides;fluorescence detection;sensor;pyrene group
研究领域:
材料科学
·
分析化学
·
环境科学
✓ 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）