MOLECULES
·
2022
·Vol. 27
·期 18
·6084
·
IF 4.927
Tingting Zhou,Ziwen Deng,Qing Wang,Hui Li,Shun Li,Xuanming Xu,Yusun Zhou,Shukai Sun,Chao Xuan,Qingwu Tian,Limin Lun
In this work, novel selective recognition materials, namely magnetic molecularly imprinted polymers (MMIPs), were prepared. The recognition materials were used as pretreatment materials for magnetic molecularly imprinted solid-phase extraction (MSPE) to achieve the efficient adsorption, selective recognition, and rapid magnetic separation of methotrexate (MTX) in the patients’ plasma. This method was combined with high-performance liquid chromatography–ultraviolet detection (HPLC–UV) to achieve accurate and rapid detection of the plasma MTX concentration, providing a new method for the clinical detection and monitoring of the MTX concentration. The MMIPs for the selective adsorption of MTX were prepared by the sol–gel method. The materials were characterized by transmission electron microscopy, Fourier transform-infrared spectrometry, X-ray diffractometry, and X-ray photoelectron spectrometry. The MTX adsorption properties of the MMIPs were evaluated using static, dynamic, and selective adsorption experiments. On this basis, the extraction conditions were optimized systematically. The adsorption capacity of MMIPs for MTX was 39.56 mgg−1, the imprinting factor was 9.40, and the adsorption equilibrium time was 60 min. The optimal extraction conditions were as follows: the amount of MMIP was 100 mg, the loading time was 120 min, the leachate was 8:2 (v/v) water–methanol, the eluent was 4:1 (v/v) methanol–acetic acid, and the elution time was 60 min. MTX was linear in the range of 0.00005–0.25 mg mL−1, and the detection limit was 12.51 ng mL−1. The accuracy of the MSPE–HPLC–UV method for MTX detection was excellent, and the result was consistent with that of a drug concentration analyzer.Keywords:methotrexate;magnetic molecularly imprinted polymers;magnetic molecularly imprinted solid-phase extraction;high-performance liquid chromatography–ultraviolet detection
✓ 已验证
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Shunlong Pan,Xinrui Guo,Rong Li,Hao Hu,Jingwei Yuan,Biming Liu,Shengqiang Hei,Yongjun Zhang
Advanced oxidation processes (AOPs) have been successfully applied for the degradation of fluoroquinolones, but most studies ignored the removal of fluorine ions (F − ) generated after the degradation, and the remaining F − would cause secondary pollution to the water body. In this study, a novel UV radiation/hydrated Fe(III) oxide (HFO) coupling strategy was utilized to activate peroxymonosulfate (PMS) for the comprehensive enhanced removal of norfloxacin (NX) and the generated F − . Results showed that UV/HFO/PMS process significantly improved NX degradation efficiency compared with individual system, and NX degradation efficiency of 97.3% could be achieved by reactive oxygen species (ROS) generated in the process, in which singlet oxygen ( 1 O 2 ) was the main ROS. Moreover, the remaining concentration of F − was generally below 0.35 mg/L within a wide pH range (4–10). And the simultaneous adsorption of HFO for F − is mainly related to coordination and electrostatic interaction . After five cycles, the catalytic efficiency of HFO for NX removal only dropped by 4.4%. Besides, UV/HFO/PMS system had great anti-interference ability on coexisting anions. UV/vis two-dimensional correlation spectroscopy (2DCOS) analysis revealed that ROS would preferentially degrade the piperazine ring, and the quinolone group would be destroyed before the heteroatom during the degradation of NX. This work provides new insights for the treatment of antibiotic pollution.
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Qian Wang,Chensheng Lin,Guohong Zou,Mengjiao Liu,Daojiang Gao,Jian Bi,Ling Huang
A new noncentrosymmetric material, namely, K 2 [B 3 O 3 (OH) 5 ] has been obtained by conventional solution reaction. It crystallizes in the orthorhombic space group Ama 2 (no. 40). In the structure of K 2 [B 3 O 3 (OH) 5 ], the BO 2 (OH) triangles and BO 2 (OH) 2 tetrahedra are linked via sharing corners forming the isolated [B 3 O 3 (OH) 5 ] 2- anionic groups with no dangling bonds in oxygen atoms. And K 2 [B 3 O 3 (OH) 5 ] is the first synthetic noncentrosymmetric borates with [B 3 O 3 (OH) 5 ] 2- anionic groups. Powder second-harmonic generation (SHG) using the Kurtz−Perry technique showed that K 2 [B 3 O 3 (OH) 5 ] is type I phase-matchable, and the measured SHG coefficient is 0.32 times that of KH 2 PO 4 . The UV transmittance spectroscopy measurement indicated that the UV absorption edge was below 200 nm, suggesting that K 2 [B 3 O 3 (OH) 5 ] might be a promising deep-UV nonlinear optical material. Band structure and optical property calculations based on DFT methods were also performed.
✓ 已验证
DOI
高影响因子
Food Analytical Methods
·
2022
·Vol. 15
·期 9
·2479-2486
·
IF 3.498
Zhang Shengnan,Li Zhibo,Qi Yanxia,Yu Pei,Zhao Qiancheng
The determination of 2-acetyl-1-pyrroline (2-AP), which is an important flavour compound of crustaceans and has a low odour threshold of 0.05 μg/L in water, is still a challenge due to the instability and trace levels of 2-AP in food samples. In this study, 2-AP was trapped by o-phenylenediamine and subsequently purified by the dispersive solid-phase extraction and dispersive liquid–liquid microextraction (DSPE-DLLME) methods for HPLC–UV analysis. The developed method was simple, fast and sensitive for the determination of 2-AP in shrimp. Under the optimized DSPE-DLLME conditions, the developed method exhibited excellent linearity ( R 2 = 0.996) and a low limit of detection (LOD, 1.77 μg/kg) and limit of quantitation (LOQ, 5.33 μg/kg). The recoveries of 2-AP in shrimp ranged from 86.3 to 101.6%. In addition, the developed method was applied to detect 2-AP levels in baked shrimp (ranging from 5.6 to 12.6 μg/kg), indicating that the formation of 2-AP could be observed in thermally treated shrimp depending on heating temperature and time. In summary, the developed method has potential application for the trace determination of 2-AP in shrimp due to its convenience and high sensitivity.
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2017
·
IF 6.065
Yannan Chen,Gangqiang Zhu,Mirabbos Hojamberdiev,Jianzhi Gao,Runliang Zhu,Chenghui Wang,Xiumei Wei,Peng Liu
Ag 2 O nanoparticles-loaded Bi 5 O 7 I microspheres forming a three dimensional Ag 2 O/Bi 5 O 7 I p – n heterojunction photocatalyst with wide-spectrum response were synthesized in this study. The results of transmission electron microscopy observations revealed that the Ag 2 O nanoparticles with the diameter of ca. 10–20 nm were distributed on the surfaces of Bi 5 O 7 I nanosheets. The as-synthesized Ag 2 O/Bi 5 O 7 I exhibited an excellent wide-spectrum response to wavelengths ranging from ultraviolet (UV) to near-infrared (NIR), indicating its potential for effective utilization of solar energy. Compared with pure Bi 5 O 7 I, the Ag 2 O/Bi 5 O 7 I composite also demonstrated excellent photocatalytic activity for the degradation of Bisphenol A and phenol in aqueous solution under visible LED light irradiation. Among samples, the 20% Ag 2 O/Bi 5 O 7 I composite photocatalyst showed the highest photocatalytic activity for the degradation of Bisphenol A and phenol in aqueous solution. In addition, the 20% Ag 2 O/Bi 5 O 7 I composite also exhibited a photocatalytic activity for the degradation of Bisphenol A under NIR light irradiation. The improved photocatalytic activity is attributed to the formation of a p - n heterojunction between Ag 2 O and Bi 5 O 7 I, allowing the efficient utilization of solar energy (from UV to NIR) and high separation efficiency of photogenerated electron-hole pairs. The present work is desirable to explore a possible avenue for the full utilization of solar energy.
✓ 已验证
DOI
PubMed
高影响因子
Micromachines
·
2022
·Vol. 13
·期 4
·543
·
IF 3.523
Aodong Zhang,Jian Xu,Yucen Li,Ming Hu,Zijie Lin,Yunpeng Song,Jia Qi,Wei Chen,Zhaoxiang Liu,Ya Cheng
We demonstrate a hybrid laser microfabrication approach, which combines the technical merits of ultrafast laser-assisted chemical etching and carbon dioxide laser-induced in situ melting for centimeter-scale and bonding-free fabrication of 3D complex hollow microstructures in fused silica glass. With the developed approach, large-scale fused silica microfluidic chips with integrated 3D cascaded micromixing units can be reliably manufactured. High-performance on-chip mixing and continuous-flow photochemical synthesis under UV irradiation at ~280 nm were demonstrated using the manufactured chip, indicating a powerful capability for versatile fabrication of highly transparent all-glass microfluidic reactors for on-chip photochemical synthesis.Keywords:ultrafast laser direct writing;chemical etching;carbon dioxide laser processing;3D glass microfluidics;fused silica;continuous-flow photochemical synthesis
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2019
·Vol. 35
·期 2
·200-208
·
IF 1.071
Shi Yanpeng,Chen Xiaodong,Mi Zhiming,Zheng Ran,Fan Jie,Gu Qiang,Zhang Yumin
Two new compounds, 4-(2-bromophenyl-4,5-diphenyl-imidazol-1-yl)aniline(probe 1 ) and 4-[2,4,5-tris(4-bromophenyl)-1 H -imidazol-1-yl]aniline(probe 2 ), were synthesized via a soft and high-efficiency one-pot microwave- assisted method under solvent-free conditions. Their sensing to different metal ions was detected by UV spectrophotometry and fluorescence spectrometry. Probe 2 revealed highly selective and sensitive UV and fluorescence response to Fe 3+ ion. Upon the addition of Fe 3+ ion, probe 2 showed obvious color change of the solution, conspicuous absorbance enhancement and relatively quick fluorescence quenching. The detection limit for Fe 3+ ion was respectively calculated to be 0.72 μmol/L(fluorescent detection) and 0.48 μmol/L(UV-spectrum detection). Also, probe 2 was bound by Fe 3+ ion to form a 1:1 complex. Moreover, preliminary application of probe 2 for detecting Fe 3+ ion in aqueous solution was attempted, and satisfying results were obtained.
✓ 已验证
DOI
高影响因子
Water
·
2021
·Vol. 13
·期 21
·3035
·
IF 3.103
Xinlu Qu,Haowei Wu,Tianyang Zhang,Qianhong Liu,Mu Wang,Mohamed Yateh,Yulin Tang
As an emerging light source, ultraviolet light emitting diodes (UV-LEDs) are adopted to overcome the shortcomings of the conventional mercury lamp, such as mercury pollution. The degradation of chloramphenicol (CAP) using three UV-LED-based advanced oxidation processes (AOPs)—UV-LED/persulfate (UV-LED/PS), UV-LED/peroxymonosulfate (UV-LED/PMS) and UV-LED/chlorine—was investigated. Results indicate that CAP can be more effectively degraded by the hybrid processes when compared to UV irradiation and oxidants alone. Degradation of CAP using the three UV-LED-based AOPs followed pseudo-first-order kinetics. The degradation rate constants (kobs) for UV-LED/PS, UV-LED/PMS, and UV-LED/chlorine were 0.0522, 0.0437 and 0.0523 min−1, and the CAP removal rates 99%, 98.1% and 96.3%, respectively. The degradation rate constant (kobs) increased with increasing oxidant dosage for UV-LED/chlorine, whereas overdosing reduced CAP degradation using UV-LED/PS and UV-LED/PMS. Ultraviolet wavelength influenced degradation efficiency of the UV-LED based AOPs with maximum CAP degradation observed at a wavelength of 280 nm. The application of UV-LED enhanced the formation DBPs during subsequent chlorination. uUV-LED/PMS produced more disinfection by-products than UV-LED/PS. Compared to UV-LED, UV-LED/PS reduced the formation of dichloroacetonitrile and trichloronitromethane during chlorination owing to its capacity to degrade the nitro group in CAP. The intermediates dichloroacetamide, 4-nitrobenzoic acid, 4-nitrophenol were produced during the degradation of CAP using each of UV-LED, UV-LED/PS and UV-LED/chlorine. The present study provides further evidence supporting the application of UV-LED in AOPs.Keywords:chloramphenicol;advanced oxidation processes;UV-LED
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Mingchen Yang,Chengling Huang,Hou-Yong Yu,Yanjuan Dong,Somia Yassin Hussain Abdalkarim,Cong Cong Qin,Meiqin Wu,Yunfei Shen
Hydrogels with excellent high-water uptake and flexibility have great potential for wound dressing. However, pure hydrogels without fiber skeleton faced poor water retention, weak fatigue resistance, and mechanical strength to hinder the development of the dressing as next-generation functional dressings. We prepared an ultrafast gelation (6 s) Fe 3+ /TA-CNC hydrogel (CTFG hydrogel) based on a self-catalytic system and bilayer self-assembled composites. The CTFG hydrogel has excellent flexibility (800% of strain), fatigue resistance (support 60% compression cycles), antibacterial, and self-adhesive properties (no residue or allergy after peeling off the skin). CTFG@S bilayer composites were formed after electrospun silk fibroin (SF) membranes were prepared and adhesive with CTFG hydrogels. The CTFG@S bilayer composites had significant UV-shielding (99.95%), tensile strain (210.9 KPa), and sensitive humidity-sensing properties. Moreover, the integrated structure improved the mechanical properties of electrospun SF membranes. This study would provide a promising strategy for rapidly preparing multifunctional hydrogels for wound dressing.
✓ 已验证
DOI
PubMed
高影响因子
APPLIED CLAY SCIENCE
·
2015
·
IF 2.467
Canlin Zhang,Jianying Yu,Kai Feng,Lihui Xue,Dong Xie
Layered double hydroxides (LDH) surface modified by triethoxyvinylsilane (TEVS) was prepared and characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) and Ultraviolet and visible (UV–Vis) spectrophotometry . FTIR and XRD showed that TEVS has been successfully grafted onto the surface of LDH. Compared with LDH, the agglomeration between the TEVS surface modified LDH (TEVS-LDH) particles was obviously weakened according to SEM. UV–Vis reflectance and absorbance analyses indicated that TEVS-LDH possessed better UV reflectance and absorbance than that of LDH. Then the effects of TEVS-LDH and LDH on the physical and anti-aging properties of bitumen were thoroughly evaluated. The storage stability test showed that TEVS-LDH existed more stably than LDH in bitumen, which was due to the surface modification of LDH which improved the compatibility between LDH and bitumen. The results of physical properties tests showed that TEVS-LDH improved high-temperature behavior and had a less pronounced effect on the low temperature ductility of bitumen in contrast with LDH. Aging indices (viscosity aging index, softening point increment and ductility retention rate) and FTIR showed that TEVS-LDH exhibited better improvement than LDH on anti-ultraviolet aging of bitumen.
✓ 已验证
DOI
高影响因子
CHROMATOGRAPHIA
·
2014
·Vol. 77
·期 23
·1705-1712
·
IF 1.37
Zhaoling Jiang,Lifang Zhang,Chong Zhang,Xiao Zhang,Feiqun Xue
Ultra high performance liquid chromatography with UV detection was developed and validated for the simultaneous determination of residues of toltrazuril and its two metabolites, namely, toltrazuril sulphone and toltrazuril sulphoxide, in edible tissues (chicken and porcine muscle, liver and kidney). Acetonitrile was used to extract analytes from tissues, which were then cleaned using primary secondary amine and Oasis™ MAX solid phase extraction cartridges. Chromatographic separation was performed on a C 18 column with gradient elution. The analytes were determined using a UV detector. The regression coefficients of matrix-matched calibration curves showed linearity of >0.99. Calibration ranged from 25 to 1,000 μg kg −1 for toltrazuril and toltrazuril sulphone, and 37.5–1,500 μg kg −1 for toltrazuril sulphoxide. The accuracy was between 80 and 110 %, and the inter and intraday RSDs were lower than 15.2 and 18.3 %, respectively. The limits of detection for toltrazuril, toltrazuril sulphone and toltrazuril sulphoxide were between 10 and 37.5 μg kg −1 in all the tissues. The developed method was successfully applied to detect toltrazuril, toltrazuril sulphone and toltrazuril sulphoxide in tissues of medicated chicken.
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Yumeng Liu,Jinniu Zhang,Gang Li,Jia Liu,Qingfei Liang,Hongjun Wang,Yuanyuan Zhu,Jianzhi Gao,Hongbing Lu
In 2 O 3 –ZnO nanotubes were prepared by a solvent thermal method using electrospun indium nitrate–polyvinyl pyrrolidone [In(NO 3 ) 3 –PVP] nanofibers as a sacrificial template. The sensing properties toward NO 2 of this kind of new emerging sensing material were explored. Compared with as-electrospun In 2 O 3 nanofibers, the In 2 O 3 –ZnO composite nanotubes exhibited higher responses and better selectivity to NO 2 . The response of the In 2 O 3 –ZnO nanotubes to 500 ppb NO 2 at room temperature (RT, 25 °C) under UV irradiation was as high as to 32.73, which was 3.33 times higher than that of the In 2 O 3 nanofibers. Moreover, even under a high relative humidity of 80%, the RT NO 2 response of the In 2 O 3 –ZnO composite nanotubes can still reach up to 3.50–500 ppb. The enhanced NO 2 sensing characteristics were mainly ascribed to the formation of In 2 O 3 –ZnO n–n heterojunctions , the enhanced light absorption, and the increased oxygen vacancy proportion. The results suggested that In 2 O 3 –ZnO nanotubes had good potential for the selective and sensitive detection of ppb-level NO 2 at RT.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）