SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Haike Li,Zhiyun Kong,Huan Zhang,Xiaolei Wang,Yaohua Xie,Xingqing Zhao,Yidan Hong
It is necessary to prepare a nanofiltration membrane with high permeation flux that can be used in the field of organic solvents. Gel membranes have a high solvent permeation flux, but their chained macromolecular structure is often unstable. In this study, tannic acid-bridged sodium alginate (TA x -Ca/FeSA) organic solvent nanofiltration (OSN) membranes were prepared by the phase transition method using aqueous Ca 2+ and Fe 3+ solutions as cross-linking agents. TA can interact with SA through hydrogen bonding hydrophobic bonding and other interactions to form an interpenetrating three-dimensional network structure. Compared with Ca/FeSA membrane, the average pore size of TA 0.125 -Ca/FeSA membrane was reduced from 1.03 nm to 0.74 nm, and the porosity was increased from 47.62 to 59.2 %. In addition, the TA 0.125 -Ca/FeSA membrane has the characteristics of a negative charge, super hydrophilicity, and high mechanical properties, exhibits a high permeation flux of 48.97 L·m −2 ·h −1 ·bar −1 with a rejection of 96.25 % for Congo red ethanol solution, has excellent solvent resistance, stain resistance, and self-cleaning ability. The TA 0.125 -Ca/FeSA membrane was demonstrated to have great potential for application in the fields of purification and solvent recovery.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 9
·2028
·
IF 4.6
Jialu Qu,Xingyu Duan,Ke Xue,Shengli An
Solid-state electrolytes (SSEs) have emerged as the most promising alternative to liquid electrolytes in batteries due to their enhanced stability and safety. Among these, the garnet-type Li7La3Zr2O12(LLZO) solid electrolyte has attracted significant research interest due to its wide electrochemical stability window and good air stability. However, the ionic conductivity of LLZO is lower due to its high sintering temperature and unstable phase structure. In this study, Li6.4+xFe0.2La3Zr2−xBixO12(x = 0, 0.05, 0.1, 0.15) solid electrolytes were synthesized using a conventional solid-state reaction method by co-doping LLZO with Fe3+and Bi3+ions. Compared with pure LLZO, doping with Fe3+effectively stabilizes the cubic phase, thereby enhancing the ionic conductivity. Moreover, Bi3+doping significantly lowers the sintering temperature of the electrolyte, which in turn reduces energy consumption during the processing. The co-doping of Fe3+and Bi3+not only improves the density of the LLZO electrolyte, achieving a relative density of up to 95%, but also increases the ionic conductivity, with a maximum value of 7.57 × 10−4S·cm−1observed at the optimal composition (Li6.4+xFe0.2La3Zr2-xBixO12, x = 0.1).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Meiqi Zhang,Yijie Yang,Luo Feng,Xiaoqi Sun
Near infrared reflective inorganic pigment YIn 1-x-y Mn y Fe x O 3 (x/y = 0.1–0.5) was prepared by solid state reaction. The X-ray diffraction analysis and CIE1976 L*a*b* colorimetric analysis reveal that the main phase of the sample is changed from YInO 3 phase to YFeO 3 phase and the color of the sample is changed from blue to black (x ≥ 0.4) with the increase of iron content. The brightness value of black pigment ranges from 23.27 to 32.12. When In 3+ is replaced by Fe 3+ and Mn 3+ , the band gap of the black sample is decreased from 1.73eV to 1.39eV. The near-infrared reflectance (R) and near-infrared solar reflectance (R*) of the sample reach the maximum when x = 0.4 and y = 0.1, which are 77.82% and 53.44%, respectively. YIn 1-x-y Mn y Fe x O 3 (x = 0.4–0.5, y = 0.1–0.5) black samples have higher near infrared reflectivity than common commercial black pigments. In the thermal insulation study, under the condition of infrared irradiation for 90 min, the internal air temperature difference between the iron car model coated with YIn 0.5 Mn 0.1 Fe 0.4 O 3 pigment and the iron car model coated with commercial iron black pigment can reach 7 °C. YIn 0.5 Mn 0.1 Fe 0.4 O 3 black pigment was soaked in 5% acid-alkali solution for 24 h, the chromaticity was almost unchanged before and after immersion, indicating that the sample has good chemical stability. The above properties show the potential of synthetic black pigments in the field of energy conservation.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Minzhong Li,Yahong Jin,Lifang Yuan,Bo Wang,Haoyi Wu,Yihua Hu,Feng Wang
The advent of near-infrared (NIR) afterglow in Cr3+-doped materials has stimulated considerable interest in technological applications owing to the sustainable emission of light with good penetrability. However, the development of Cr3+-free NIR afterglow phosphors with high efficiency, low cost, and precise spectral tunability is still an open question. Herein, we report a novel Fe3+-activated NIR long afterglow phosphor composed of Mg2SnO4 (MSO), in which Fe3+ ions occupy the tetrahedral [Mg–O4] and octahedral [Sn/Mg–O6] sites, giving rise to a broadband NIR emission spanning 720–789 nm. On account of energy-level alignment, the electrons released from the traps show a preferential return to the excited energy level of Fe3+ in tetrahedral sites through tunneling, leading to a single-peak NIR afterglow centered at 789 nm with a full-width at half-maximum (fwhm) of 140 nm. The high-efficiency NIR afterglow, showing a record persistent time lasting over 31 h among Fe3+-based phosphors, is demonstrated as a self-sustainable light source for night vision applications. This work not only provides a novel Fe3+-doped high-efficiency NIR afterglow phosphor for technological applications but also establishes practical guidance for rational tuning of afterglow emissions.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Lingyan Zhu,Dongbing Li,Heng Lu,Shangkun Zhang,Hao Gao
The synthesis of lignin-based graphene quantum dots (GQDs) with excellent fluorescence stability, quantum yield , and biocompatibility for sensitive and selective detection of Fe 3+ and ascorbic acid (AA) has remained a challenging endeavor. Using an acidolysis process with 17.5% nitric acid followed by hydrothermal treatment at 200 °C, this study provided an improved synthesis route for the production of high-quality GQDs from alkali lignin. The nitrogen-doped GQDs exhibit remarkable fluorescence stability under a wide range of pH (3–10), duration (1–12 h), and [NaCl] (0–1000 mM) conditions, and have a high quantum yield of 28%. The GQDs or GQDs/Fe 3+ sensing systems ([GQDs] at 50 mg L −1 , [Fe 3+ ] at 500 μmol L −1 , and UV excitation at 370 nm) for fluorescence sensing of Fe 3+ or AA have excellent sensitivity, selectivity, and reproducibility. For Fe 3+ and AA, the limit of detection is 1.49 and 1.62 μmol L −1 , respectively. Mechanism investigation shows that photoluminescence quenching is caused by the formation of GQDs-Fe 3+ complexes, whereas fluorescence recovery is due to Fe 3+ reduction by AA.
研究领域:
材料科学
·
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2022
·
IF 3.428
Han Zhang,Xi-Hui Diao,Chao Chen,Yaseen Muhammad,Yuan-Yuan Gao,Xiao-Jing Dong,Hao Wang,Wei Li,Chuan-Song Qi
The reactions of 1,2-bis(4-pyridyl)ethylene (bpe) and 2,5-furandicarboxylic acid (H 2 fdc) with Zinc(II) salts in different concentrations resulted in two new complexes, [Zn(fdc)(bpe)]∙DMF ( 1) and [Zn 4 (fdc) 4 (bpe) 4 (H 2 O) 2 ] ∙DMF·2H 2 O ( 2) . At lower concentrations, 1 was formed, in which {Zn 2 (CO 2 ) 2 } can be seen as a 6-connected node, and the whole framework is a 2-fold interpenetrated pcu network. On the contrary, at higher concentrations, 2 was synthesized, in which all Zn 2+ ions act as 4-connected nodes, and the whole framework is a 5-fold interpenetrated dia network. 1 and 2 are proven to be promising sensors towards Fe 3+ ions with high sensitivity and selectivity through fluorescence quenching.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Arabian Journal of Chemistry
·
2024
·
IF 5.3
Qinhai Xu,Kang Li,Peng Wang
The reaction mechanism of p -hydroxystyryl-substituted BODIPY (BOH) with two oxidative cations, namely ABTS •+ and Fe 3+ , was investigated in a water–ethanol mixed solution and in liposome suspensions, respectively, using different spectroscopic methods. In solution, the oxidation of BOH (with orange fluorescence) by the two cations occurred at the ethylene group (C C) locating between the dipyrrole and phenol groups and resulted in conjugation-truncated products exhibiting characteristic green fluorescence emission. In heterogeneous small unilamellar vesicles (SUV), water soluble ABTS •+ was evidenced to oxidize BOH embedded in the lipid bilayers of SUV, while Fe 3+ did not. The lack of reaction between Fe 3+ and BOH was attributed to the complexation between Fe 3+ and the phenolic hydroxyl group of BOH on the surface of the SUV. The reaction kinetics results indicated that, in homogeneous solution, the oxidation rate of Fe 3+ was three orders of magnitude slower than that of ABTS •+ for BOH. The location and orientation of BOH within the SUV were discussed based on the reaction phenomena. BOH could be as a good antioxidant fluorescent prober for ABTS •+ detection with a detection limit of 1.5 * 10 −7 M and a linear rang of 0–4.93 μM. What’s more, the amphiphilic BOH dispersed in the round GUV (BOH + GUV) could show the bright red fluorescence. This research suggests the significant potential of BOH as an antioxidant fluorescent probe for in situ bioimaging.
研究领域:
化学
·
生物化学
·
医学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Jia Huang,Zhiqin Deng,Caihe Ding,Yanzi Jin,Bin Wang,Jiucun Chen
A visible luminous sensing platform was studied by using peroxyoxalate-based chemiluminescent (PO CL) system and fluorescent carbon dots (CDs). The new CDs were synthesized by hydrothermal treatment of red pitaya, which owned abundant O-related surface functional groups and thus displayed high sensitivity and selectivity toward Fe 3+ ion. Based on peroxyoxalate/carbon dots chemiluminescent (PO/CDs CL) reaction, a visible luminous sensing platform was constructed, in which CDs acted as capturers and emitters for Fe 3+ identification and luminescence signal. Using this technique, a trace of Fe 3+ ion can be simply and efficiently distinguished without instrumental assistance. It turns out that the proposed method has good sensitivity, selectivity and potential application in sensing.
研究领域:
分析化学
·
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
TALANTA
·
2024
·
IF 5.6
Renjie Li,Haizhe Zhang,Weiqi Leng,Zhipeng Liu,Jiangtao Shi
At present, excessive Fe 3+ in daily water has become a threat to human health. Among the conventional detection methods for Fe 3+ , fluorescent probes have been applied on a large scale due to their simplicity and efficiency. However, the currently available fluorescent probes are difficult to synthesize, costly and environmentally unfriendly, limiting their applications. In this work, a fluorescent extract of Pterocarpus wood was successfully obtained, and the structure of some coumarin-based molecules in this extract was determined by 2D-NMR. Subsequently, the intensity of this fluorescence was optimized using response surface methodology (RSM), resulting in a high-intensity fluorescent probe. The probe was sensitive to the concentrations of Fe 3+ and MnO 4 − , and could efficiently detects Fe 3+ in the range of 2.7 μM–8.0 μM, with LOD and LOQ reaching 1.06 μM and 3.20 μM, respectively. Moreover, based on the strong complexation property of EDTA on Fe 3+ , this work designed the "switch-on" fluorescent probes . The experiment shows that both static and dynamic quenching exist in this system. The mechanism of complexation and oxidation of fluorescent molecules by the quencher is interpreted in the quenching reaction. In addition, the fluorescent probe has a high yield and low cost, it also performs well in actual water sample tests. This method is expected to be developed as a new way on Fe 3+ detection.
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FERROELECTRICS
·
2022
·
IF 0.695
Qiang Shen,Songyuan Mao,Yubin Zhou,Yuheng Xie,Peisong Tang
Fe3+ modified bentonite was firstly prepared by ion change method and Fe2+ modified bentonite was then synthesized by reduction of Fe3+-bentonite. The modified bentonites were characterized with XRD and SEM. The adsorption ability of Tetracycline (TC) of Fe3+-bentonite and Fe2+-bentonite was compared with raw bentonite. The catalytic activity of two Fe-bentonites used as heterogeneous Fenton catalyst are also examined. The resulted shows that both of Fe3+-bentonite and Fe2+-bentonite exhibited superior removal performance of TC. The removal capacities of Fe3+-bentonite and Fe2+-bentonite in the 400 mg/L TC solution reached 98.15% and 96.55%, respectively. The Fe3+-bentonite and Fe2+-bentonite remains 75% removal abilities after 3 rounds under Fenton condition. The mechanisms of adsorption and Fenton degradation of Fe modified bentonite were also discussed.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2020
·
IF 5.278
Linli Hou,Yonghai Song,Fengxiang Lang,Zhenrong Wang,Li Wang
A luminescent Tb 3+ -pyromellitic acid (H 4 L = pyromellitic acid) coordination polymer (Tb-H 4 L CP, TbL 0.5 (H 2 L) 0.5 (H 2 O)·DMF) was prepared for multiresponsive fluorescence sensor. The Tb-H 4 L CP exhibits uniform nanospheres with average diameter of 220 ± 20 nm, good crystalline structure, and good dispersion in water. The Tb-H 4 L CP emitted the characteristic green fluorescence through antenna effect from H 4 L which was an excellent antenna molecule when excited at 270 nm and could be used to selectively determine Fe 3+ and polychlorinated benzenes based on fluorescence quenching effect. The coordination between Fe 3+ and carboxylic oxygen of Tb-H 4 L to damage the antenna effect and polychlorinated benzenes absorb the excitation light to result the inner-filter effect of fluorescence, which quenched the fluorescence of Tb-H 4 L CP. The linear range for Fe 3+ was 2.0–100 μM with a detection limit of 0.7 μM and for 1,3,5-trichlorobenzene was 0–0.44 × 10 3 ppm with a detection limit of 0.087 ppm. The Tb-H 4 L CP demonstrates excellent fluorescence sensing performances, indicating that it can be used as a multi-response sensor to effectively measure toxic and harmful substances.
研究领域:
化学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2019
·
IF 3.206
Xu Chen,Jianliang Bai,Yusha Ma,Guojun Yuan,Jing Mei,Lu Zhang,Lili Ren
Recently, carbon dots (CDs) with long wavelength (i.e., orange and red-light) are gradually critical in the bioimaging and biomedical fields. In this paper, a simple one-pot hydrothermal method for preparing bright orange N-doped carbon dots (N-CDs) from p -phenylenediamine has been developed. The resulting N-CDs with abundant surface functional groups show strong orange fluorescence, certain water solubility property and obvious fluorescence quenching to Fe 3+ ions and pH. What's more, the fluorescence of the N-CDs displays a consequent color variation with the increasing concentration of Fe 3+ and pH. In short, N-CDs can be considered as an efficient and multifunctional fluorescent sensor for monitoring pH and Fe 3+ because of their prominent biocompatibility and low toxicity characteristics.
研究领域:
生物医学
·
材料科学
·
分析化学
✓ 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）