CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Zhenzhen Liu,Mingjie Chen,Yanzhu Guo,Jinghui Zhou,Qingshan Shi,Runcang Sun
A major challenge in preparing nitrogen-doped carbon dots (N-CDs) from the world’s most abundant material, cellulose, is its limited chemical accessibility, which results in low yield and low quantum yield (QY) of the obtained N-CDs. Herein, we showed that the overall yield and QY of N-CDs from dissolving pulp were significantly improved from 2.9% and 9.7% to 16.1% and 30.3% with an oxidation treatment. The efficient synthesis of N-CDs from dissolving pulp was attributed to the enhanced chemical accessibility of cellulose by the oxidation process. The obtained N-CDs showed a graphite-like structure rich in carboxyl and amino functional groups. They were well monodispersed spherical nanoparticles with a mean diameter of 1.86 nm. Also, the as-prepared N-CDs showed excellent selective and sensitive response to Fe 3+ ions with the detection limit of 1.14 μM. In addition, vitro cytotoxicity test indicated the non-toxicity of N-CDs which enabled their success as fluorescent probe for bio-imaging of Vero cells. Summarily, this study presented an improved strategy to synthesize advanced materials with potential application in sensor, bioimaging and biomedical from the world’s most abundant, cheapest, green and renewable materials-cellulose.
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Dongdong Ge,Jiamu Xiao,Chang Bian,Haiping Yuan,Nanwen Zhu
Waste activated sludge (WAS), as a kind of hydrophilic colloid substance, is still a major technical challenge in wastewater treatment industry. For enhancing WAS dewaterability, the approach of tannic acid (TA)/Fe 3+ conditioning was verified to be feasible. During conditioning, sludge extracellular protein decreased pronouncedly. Fluorescence quenching analysis revealed that Fe 3+ reduced the binding sites of extracellular polymeric substances available for TA, and the formed TA-Fe 3+ complexes possibly promoted TA aggregates’ settlement and compression. Sludge supernatant viscosity, absolute value of zeta potential and pH value also decreased distinctly, and sludge particle size became larger than that of raw sludge or Fe 3+ -conditioned sludge. Scanning electron microscope suggested that sludge surface morphology became more compacted and denser after TA/Fe 3+ conditioning, which was helpful for the release of water trapped in sludge bio-polymeric network. With 0.15 mmol/gTS TA and 0.9 mmol/gTS Fe 3+ conditioning, sludge capillary suction time, specific resistance of filtration and water content of dewatered sludge cake were decreased by 76.3%, 94.7% and 13.5%, respectively. The findings not only shed new light on the means of applying natural plant organic polymer coupled with inorganic cation to promote WAS dewaterability but offered a potentially theoretical principle of the utilization of plant waste containing TA in WAS treatment.
研究领域:
环境科学
·
污水处理
✓ 已验证
DOI
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
Micro & Nano Letters
·
2022
·Vol. 17
·期 14
·396-401
·
IF 0.98
You Zhang,Mingyang Li,Yanan Ding,Le Dai,Yue Wu,Yibo Zheng,Xiaoguang Li,Li Guan,Xu Li
Carbon dots (CDs) were paid more and more attention for detecting ferric ions (Fe 3+ ) containing in the organism or environment. Thus, nitrogen and phosphorus co-doping green CDs were synthesized using p-Phenylenediamine as the carbon source and phosphoric acid as phosphorus source by the solvo-thermal method. As-prepared CDs were characterized by morphology, optical properties, and surface functional groups. The CDs can emit better green light peak at 511 nm excited by 380 nm UV light. Excitation independence property of N, P-CDs was determined by measuring the photoluminescence (PL) spectra with different excitation wavelengths. The ions detection ability was investigated by analyzing the emission intensity of CDs in eight different kinds of ions solutions and different concentrations of Fe 3+ ions solutions. The N, P-CDs show high selectivity towards Fe 3+ ions with a limit of detection (LOD) of 0.11 μM in the concentration region of 300 to 450 μM. The results illuminated that this kind of CDs can be a candidate material for Fe 3+ ions detection.
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Tingting Liu,Xiaocui Lai,Ping Guo,Wei Zhang,Gan Zhang,Mengyun Wu,Guangjian Xue,Xuechen Fang,Juan Peng,Weihua Lai
As kanamycin (KAN) residue in animal products is harmful to consumers, a rapid and sensitive method for KAN detection needs to be established. KAN monoclonal antibody (KAN-mAb, 1D11) with the half maximal inhibitory concentration of 1.16 ng/mL was prepared in this study. A one-pot method was used to synthesize Fe 3+ -chelated polydopamine nanospheres (Fe@PDANs) with excellent characteristics of strong light absorption. The novel label of Fe@PDANs and KAN-mAb was used to develop a lateral flow immunoassay (LFIA) for the sensitive detection of KAN. The limit of detection of the Fe@PDANs-based LFIA (Fe@PDANs-LFIA) for KAN was 0.0191 ng/mL, which was 2.75 times lower than PDANs-based LFIA. Furthermore, the Fe@PDANs-LFIA was successfully applied to detect KAN in pork, milk, and honey samples, with recoveries ranging from 93.75% to 113.80% (coefficient of variation < 10%). Therefore, Fe@PDANs have potential for the detection of analytes in LFIA.
✓ 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）