ULTRASONICS SONOCHEMISTRY
·
2019
·
IF 7.279
Guanshu Li,Ludong Yi,Jun Wang,Youtao Song
In this paper, a novel method, hydrodynamic cavitation (HC) combined with Fe 3+ -doped TiO 2 , for the degradation of organic pollutants in aqueous solution is reported. The venturi tubes with different geometric parameters (size, shape and half divergent angle) are designed to obtain a strong HC effect. The structure, morphology and chemical composition of prepared Fe 3+ -doped TiO 2 as catalyst are characterized via using XRD , SEM, TEM , XPS, UV-vis DRS and PL methods. The effects of added TiO 2 (heat-treated at different temperatures for different times) and Fe 3+ -doped TiO 2 (with different mole ratios of Fe and Ti) on the HC catalytic degradation of RhB are discussed. The influences of operation parameters including inlet pressure, initial RhB concentration and operating temperature on the HC catalytic degradation of RhB are studied by Box-Behnken design (BBD) and response surface methodology (RSM). Under 3.0 bar inlet pressure for 10 mg/L initial concentration of RhB solution at 40 °C operating temperature in the presence of Fe 3+ -doped TiO 2 with 0.05:1.00 M ratio of Fe and Ti, the best HC degradation ratio can be obtained (91.11%). Furthermore, a possible mechanism of HC degradation of organic pollutants in the presence of Fe 3+ -doped TiO 2 is proposed. Perhaps, this study may provide a feasible method for a large-scale treatment of dye wastewater.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Suzhou Xu,Can Liu,Xuping Jiang,Xinyu Wang,Shijin Zhang,Yanting Zhang,Qingguo Wang,Weiling Xiong,Jing Zhang
The performance and mechanisms of a titanium carbide (Ti 3 C 2 ) MXene modified Fe 3+ /hydrogen peroxide (H 2 O 2 ) system were compared in detail under dark and visible light conditions, with a new mechanism proposed for the reaction and reduction of MXene by Fe 3+ . Using Bisphenol A (BPA) as the target pollutant, the degradation of BPA by the Fe 3+ /H 2 O 2 system was improved after adding MXene in the dark, and the degradation rate of BPA was ≥ 95 % within 12.5 min under visible light, six times higher than that in the dark. Fe 2+ was ascertained to be the effective component responsible for H 2 O 2 activation to produce ·OH. SEM , XPS, ICP, XRD, and FTIR spectroscopy , analyses show that MXene and Fe 3+ form a complex, and then MXene reacts with Fe 3+ by breaking the Ti–C bonding to accelerate the Fe 3+ /Fe 2+ cycle. MXene uses photogenerated electrons to promote this reaction under visible light. In addition, quenching experiments and electron spin resonance spectroscopy results show that ·OH and O 2 •− are the main reactive oxygen species under visible light, while ·OH is the main active species in the dark. MXene thus effectively uses O 2 to form O 2 •− under visible light and promotes the Fe 3+ /Fe 2+ cycle. This study provides a theoretical basis for the combination of visible light catalysis and the advanced oxidation process of a Ti 3 C 2 MXene.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 19
·6749
·
IF 4.927
Zhuang Xiang,Yuxiang Jiang,Chen Cui,Yuanping Luo,Zhili Peng
In this study, C-dots were facilely synthesized via microwave irradiation using citric acid and ethylenediamine as carbon precursors. The fluorescence emissions of the C-dots could be selectively quenched by Fe3+, and the degree of quenching was linearly related to the concentrations of Fe3+presented. This phenomenon was utilized to develop a sensitive fluorescence assay for Fe3+detection with broad linear range (0–250, 250–1200 μmol/L) and low detection limit (1.68 μmol/L). Most importantly, the assay demonstrated high reliability towards samples in deionized water, tap water and lake water, which should find potential applications for Fe3+monitoring in complicated environments.Keywords:Fe3+;fluorescence sensing;carbon dots;lake water;limit of detection
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2023
·
IF 4.3
Han Luodan,Chen Zhiwei,Yu Chunxiao,Tang Keren,Wang Yonghao,Sun Weiming,Zhang Xi,Yao Xu,Chen Jinghua,Wu Fang,Lan Jianming
In this work, an upconversion luminescence (UCL) nanosensor for fast detection of ferric ion (Fe 3+ ) and phosphate ion (Pi) is developed based on the inner-filter effect (IFE) between NaYF 4 :Yb/Er upconversion nanoparticles (UCNPs) and Fe 3+ -hypocrellin B (HB) complex. Fe 3+ -HB complex has strong absorption band (450–650 nm), which overlaps with the green emission peak of UCNPs at 545 nm. By adding Fe 3+ and Pi, the UCNPs-HB system produces the red-shift change of absorption spectrum, which leads to the “on–off-on” process of IFE. So, with the specific recognition ability of HB for Fe 3+ and the competitive complexation of Pi for Fe 3+ , the proposed nanosensor utilizes the UCL change to achieve the detection of the targets. For the detections of Fe 3+ , the linear range is 10–600 μM with a limit of detection (LOD) of 2.62 μM, and for Pi, the linear range is 5–100 μM with a LOD of 1.25 μM. The results for selectivity, precision, and recovery test are also satisfactory. Furthermore, the real sample detection shows that the proposed nanaosensor has a great potential in environmental and biological systems. Graphical Abstract An upconversion luminescence (UCL) nanosensor based on the inner-filter effect (IFE) between upconversion nanoparticles (UCNPs) and Fe 3+ -hypocrellin B (HB) complex for the detection of Fe 3+ and phosphate ion has been proposed, which is promising to be a convenient and sensitive assay for monitoring Fe 3+ and phosphate ion in different environments and biological systems.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Simin Lin,Chunmei Lai,Zejie Huang,Wei Liu,Lei Xiong,Yuxin Wu,Yanqiao Jin
Synthesis of lignin-based carbon dots (LCDs) with high quantum yield (QY), stable fluorescence properties and biocompatibility has been a challenge. Here, we propose an improved two-step strategy for producing high-quality LCDs from enzymatic hydrolysis lignin (EHL). The p-aminobenzenesulfonic acid used in the strategy not only provides nitrogen and sulfur elements, but also tailors the disordered three-dimensional structure of EHL. The successful co-doping of N and S elements favors the reduction of the optical energy bandgap (E g ), resulting in a high QY of 45.05% for LCDs. The LCDs exhibited superior selectivity and sensitivity for Fe 3+ with a limit of detection (LOD) of 0.15 μM when Fe 3+ concentration was 50–500 μM. In addition, LCDs demonstrated significant fluorescence in HepG2 cells and HepG2 cells loaded with LCDs at a concentration of 80 μg/mL showed good viability, suggesting that they are suitable for in vivo applications. The luminescent centers of LCDs change during pH regulation and thus show a special visual response to pH changes, making them have great potential for detecting metabolism in living cells. This work provides a novel and low-cost method for fabricating sustainable fluorescent probes for chemical sensing and bioimaging.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Ziyan Li,Kuo Liu,Yuhui Wang,Tianyu Han,Hongliang Han,Lan Zhang,Yaping Li
An aggregation induced emission based compound (( E )-4-((2-hydroxy-5-methoxybenzylidene)amino)benzoic acid) was synthesized through facile Schiff base condensation and characterized by various spectral techniques. The as-prepared compound represented a typical aggregation induced emission behavior in aqueous solution and exploited as a turn-off fluorescent sensor for Fe 3+ detection in THF-H 2 O system (3:7, v/v) with high sensitivity and selectivity. The mechanism of the fluorescence quenching was intensively studied, which was attributed to both dynamic quenching and inner filter effect. The fluorescence probe displayed a highly broad dynamic response range (0.5–500 μM) for selective detection of Fe 3+ with a limit of detection of 0.079 μM. The proposed method was successfully employed for detection and quantification of Fe 3+ in human urine samples and proved to have potential for practical applications in biological field.
✓ 已验证
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Yangxian Huang,Dawei Lan,Guangliang Zhang,Riran Zang,Kunsong Hu,Man Mo,Zhijie Fang,Weijian Li,Haiqing Zhan,Xianquan Ming,Guanhan Huang,Guiliang Li,Minfeng Huang,Feng Zhan
The lead-free double perovskite with low toxicity and good performance stability has attracted much attention in optoelectronic device applications. But their photoluminescence quantum yields (PLQY) are low, which limits their applications. Co-doping and alloying are the most valuable methods to improve its PLQY and stability. In this study, we successfully synthesized Bi 3+ and Fe 3+ co-doped Cs 2 Ag 0.6 Na 0.4 InCl 6 double perovskite using the hydrothermal method , and the emission mechanism was further investigated. Under UV-light excitation, the Cs 2 Ag 0.6 Na 0.4 InCl 6 : Bi 3+ /Fe 3+ shows dual emission. This emission results from the modification effect of self-trapped exciton (STE) formation, and Fe 3+ induces longer wavelength emission. By changing the doping contents of Bi 3+ and Fe 3+ , the revolution of double perovskite color from yellow to orange-red can be observed, and its PLQY is up to 39.95%. The studies of the PL emission mechanism reveal that energy transfer occurs between the STE and Fe 3+ , and different doping contents can affect this transfer mechanism. This work has implications for producing double perovskite for optoelectronic semiconductors and provides direction for designing new lead-free double perovskites.
✓ 已验证
产品关联
DOI
高影响因子
Foods
·
2023
·Vol. 12
·期 13
·2521
·
IF 5.2
Xiaobo Li,Miao Zhang,Haizhen Mo,Hongbo Li,Dan Xu,Liangbin Hu
The increasing incidence of diseases caused by highly carcinogenic aflatoxin M1(AFM1) in food demands a simple, fast, and cost-effective detection technique capable of sensitively monitoring AFM1. Recent works predominantly focus on the electrochemical aptamer-based biosensor, which still faces challenges and high costs in experimentally identifying an efficient candidate aptamer. However, the direct electrochemical detection of AFM1has been scarcely reported thus far. In this study, we observed a significant influence on the electrochemical signals of ferric ions at a gold nanoparticle-modified glassy carbon electrode (AuNPs/GCE) by adding varying amounts of AFM1. Utilizing ferricyanide as a sensitive indicator of AFM1, we have introduced a novel approach for detecting AFM1, achieving an unprecedentedly low detection limit of 1.6 × 10−21g/L. Through monitoring the fluorescence quenching of AFM1with Fe3+addition, the interaction between them has been identified at a ratio of 1:936. Transient fluorescence analysis reveals that the fluorescence quenching process is predominantly static. It is interesting that the application of iron chelator diethylenetriaminepentaacetic acid (DTPA) cannot prevent the interaction between AFM1and Fe3+. With a particle size distribution analysis, it is suggested that a combination of AFM1and Fe3+occurs and forms a polymer-like aggregate. Nonetheless, the mutual reaction mechanism between AFM1and Fe3+remains unexplained and urgently necessitates unveiling. Finally, the developed sensor is successfully applied for the AFM1test in real samples, fully meeting the detection requirements for milk.Keywords:aflatoxin M1;electrochemical detection;gold nanoparticles;Fe3+
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYHEDRON
·
2023
·
IF 2.6
Mengyun Chen,Rong Shao,Qiongqiong Wang,Yan Gao,Ye Ma,Rongfeng Guan,Tao Yang
Metal-organic framework (MOF) fluorescent materials have significant advantages in detecting organic pollutants and metal ion pollution. A zinc metal organic framework nanofiber fluorescent membrane (Zn(Eu)-MOF@PAN NFM) was prepared by doping the lanthanide metal Eu using an electrospinning and impregnation process. The structure and morphology of the membrane was characterized by SEM, XRD, FT-IR and XPS. The results show that the membrane has good fluorescence performance and can successfully and efficiently detect nitrobenzene (NB; detection limit = 0.861 ppm, K sv = 0.143 ppm −1 ), 4-nitrophenol (4-NP; detection limit = 0.631 ppm, K sv = 0.178 ppm −1 ), benzaldehyde (BA; detection limit = 0.981 ppm, K sv = 0.051 ppm −1 ) and Fe 3+ ions (detection limit = 3.418 ppm, K sv = 3.210×10 −3 ppm −1 ) in solution. In terms of repeatability and stability, the test results are obviously better than the property of the powder.
✓ 已验证
产品关联
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2018
·
IF 5.089
Kai Zhu,Da Yu,Xiaoyuan Chen,Guanglei Song
In this work, a pH-responsive semi-interpenetrating network (semi-IPN) hydrogel consisted of peach gum polysaccharide (PGP) and Auricularia polytricha β -glucans (APP) was developed. Scanning electron microscope and confocal laser scanning microscope showed that PGP-APP hydrogel had a high porous structure with the formation of PGP-APP semi-IPN. Mössbauer and FT-IR spectroscopy revealed that the hydrogels had COO − -Fe 3+ cross-links through bridging and unidentate binding. Moreover, the delivery capability of the hydrogel was studied. The in vitro release of encapsulated Lactobacillus plantarum CICC20264 and Lactobacillus salivarius CICC23174 in simulated gastric fluid was negligible (below 2 log 10 cfu/g), while viable cells were progressively increased with the degradation of hydrogels at stimulated intestinal conditions and a complete release was reached up to more than 7 log 10 cfu/g after 10.25 h incubation. On account of stable and dense structure, PGP-APP semi-IPN hydrogels had a significant positive effect ( p < 0.05) on the viability of bacteria under gastrointestinal transition model. These studies indicated the unique properties of PGP based hydrogels and potential application as intestinal targeted delivery systems.
✓ 已验证
产品关联
DOI
高影响因子
NANO
·
2017
·
IF 1.025
Yin Zhong,Qi Chen,Junjian Li,Xihao Pan,Zhiwei Han,Wei Dong
An environment friendly, economic and maneuverable hydrothermal method was proposed for fabrication of nitrogen and chlorine co-doped carbon quantum dots (N,Cl-CQDs). D-Glucosamine hydrochloride as the only precursor offered source of carbon, nitrogen and chlorine. As a consequent N,Cl-CQDs can emit blue luminescence and detect Fe 3 + by fluorescence response with high selectivity and sensitivity. There is a linear semilogarithmic correlation between the quenching efficiency F 0 ∕ F and the concentration of Fe 3 + with a detection limit of 0.167 μ M. The N,Cl-CQDs exhibit a high quantum yield of 16.8% along with the fluorescence lifetime of 2.2 ns. It is worth noting that the prepared N,Cl-CQDs show excellent biocompatibility and they are promising materials for sensing and biology.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 35
·25359-25368
·
IF 3.9
Yajun Jiang,Aolin Wu,Lin Yang,Jun Wu,Yue Liang,Zhigang Hu,Ying Wang
This study explored the preparation of a novel composite hydrogel based on deep eutectic solvent (DES) with lysine (Lys) and its application in pressure sensing and Fe3+ adsorption. DES was synthesized from acrylamide (AM) and urea (U) as hydrogen bond donors (HBD) with choline chloride (ChCl) as hydrogen bond acceptor (HBA), and Lys was used as a functional filler, and Lys/P(AM-U-ChCl) composite hydrogels were successfully prepared by frontal polymerization (FP) method. The structure of the hydrogels was characterized in depth using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The effects of Lys content on the mechanical properties, pH-responsive behavior, pressure-sensitive properties, and Fe3+ adsorption capacity of the hydrogels were further analyzed. It was found that the introduction of Lys significantly improved the compressive and pressure-sensitive properties of the hydrogels. The composite hydrogels exhibited excellent swelling equilibrium rates at different pH values. The capacitance change of the hydrogel with 0.5 wt% Lys at 200 g pressure was 2.12-fold higher than that of the hydrogel without Lys addition, and the adsorption efficiency of the hydrogel for Fe3+ was greatly enhanced. This study provides a new idea for the functionalized design of composite hydrogels and demonstrates their great application prospects in high-performance pressure sensors and heavy metal ion adsorption.
✓ 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）