DYES AND PIGMENTS
·
2020
·
IF 4.613
Xiuling Ji,Xiaotian Yuan,Hongjuan Nian,Pengfei Song,Yingying Xiang,Yunlin Wei,Suping Wang,Kunhao Qin,Qi Zhang,Yujiao Tu
Novel blue fluorescent carbon dots (CDs- CP ) deriving from yeast Cryptococcus podzolicus 5–2 were successfully prepared via a facile and green hydrothermal synthesis method. It exhibited uniform particle size and possessed good excitation-dependent characteristic. The dead bacterial cells were selectively labled by the CDs- CP , but the live ones not, indicating good potential for the live/dead bacterial differentiation. It was found that the prepared CDs- CP showed low biotoxicity and excellent biocompatibility with multicolour fluorescence emission properties, which provided a new insight on the bioimaging application. In addition, the prepared CDs- CP exhibits high selectivity and sensitivity in Ag(I), 2,4-dinitrophenol (2,4-DNP) and 4-nitrophenol (4-NP) detection with excellent linear ranges of 0–15 μM (R 2 = 0.9945), 0–30 μM (R 2 = 0.9959) and 0–37.5 μM (R 2 = 0.9982), respectively. The low detection limits of Ag(I), 2,4-DNP and 4-NP were 113.57 nM, 73.36 nM and 86.47 nM, respectively. It revealed that static quenching mechanism dominated in Ag(I) quenching of the CDs- CP fluorescent, while those of 2,4-DNP and 4-NP were inner filter effect. The fluorescent CDs- CP was successfully applied to determine the Ag(I), 2,4-DNP and 4-NP in real water samples with satisfactory results. Therefore, it is a good candidate for bioimaging application and environmental pollutant detection.
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2020
·
IF 6.306
Huihuang Xiong,Lan Guo,Xuejin Mao,Ting Tan,Hao Wan,Yiqun Wan
A magnetic hydrophilic molecularly imprinted material (MIM) with multiple stimuli-responses was prepared for efficient recognition of bisphenol A (BPA). MIM consisted of a magnetic core, an inner silica dioxide shell and an outer hydrophilic polymer shell, responsive for rapid magnetic separation, protection of the magnetic core and pH-/thermo-sensitivity to BPA, respectively. Controlled adsorption and release of BPA by pH/temperature regulation were realized through the reversible components of poly[N-isopropylacrylamide- co -2-(dimethylamino)ethyl methacrylate (NIPAM-DMAEMA)] (PND). The resultant MIM possessed superior affinity, selectivity and kinetics to BPA in aqueous solution. MIM was successfully applied to detect BPA in beverages via dispersive solid-phase extraction (d-SPE) coupled with high performance liquid chromatography (HPLC), exhibiting satisfactory recoveries of 80.70–108.18% with relative standard deviations (RSD) below 6.08%. The limit of detection of BPA was obtained as low as 3.75 nmol/L. The versatile MIM could be a promising alternative for extraction/removal of BPA in complicated samples by multiple-stimuli regulations.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Zeying Liu,Lingze Zhang,Peng Xiao,Lingfeng Liu,Peng Tang,Ya Wang,Shihong Shen,Jiajun Liu,Zhenhai Gan,Daocheng Wu
To improve the recycling efficiency of magnetic recycling system, magnetothermally responsive composite submicron particles (CFMNs@PEG CSPs) were designed and prepared for recyclable catalytic applications, in which poly(ethylene glycol) gel was used as the shell and clusters of cobalt ferrite magnetic nanoparticles as the core. A novel strategy for recycling both loadings and carriers was proposed based on loadings immobilized CFMNs@PEG CSPs via magnetic separation at first and then magnetothermally responsive release. The morphology and core–shell structure were observed by transmission electron microscope . The physicochemical characteristics were investigated by Fourier transform infrared, 1 H NMR, Magnetic property measurement system, thermogravimetric analysis and X-ray photoelectron spectroscopy. The size of CFMNs@PEG CSPs was 285.1 ± 7.6 nm (the core was 160.0 ± 13.2 nm and PEG gel shell was 62.6 nm). The shell thickness of CFMNs@PEG CSPs shrunk from 62.6 nm to 35.5 nm when the temperature changed from 25 °C to 50 °C, and more than 95% of the loadings were released in 30 min by magnetothermally responsive release. Combing magnetic separation and magnetothermally responsive release, CFMNs@PEG CSPs were recycled over 42 times for horseradish peroxidase catalysis (horseradish peroxidase was re-immobilized for six times and reused seven times for each re-immobilization) and 25 times for gold nanoparticles catalysis (reactivated gold nanoparticles were re-immobilized for five times and reused five times for each re-immobilization) without significant catalytic activity loss, indicating their extensive potential in recyclable catalytic applications and other applications.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Xiang Li,Yan Jia,Minghua Zhou,Xianfa Su,Jianhui Sun
In this study, the Fe, N co-doped biochar (Fe-N-BC) was prepared by pyrolyzing wheat straw, urea and iron salts and used to activate persulfate (peroxydisulfate, PS) for organic contaminant degradation. Iron oxide doping not only introduced magnetism into the biochar for easy separation, but also influenced its catalytic ability for PS activation. In the Fe-N-BC/PS system, almost all acid orange (AO7) was removed within 90 min with an apparent rate constant ( k obs ) of 0.114 min −1 , which was almost 37 times larger than that of pure N-BC (0.003 min −1 ). Factors influencing the removal of AO7 were investigated, including PS concentration, catalyst dosage, and initial pH. The Fe-N-BC/PS system had high removal efficiencies for various organic contaminants and showed high resistance to inorganic anions in aquatic environments. The radical quenching studies, electron paramagnetic resonance (EPR) measurements, and electrochemical analyses verified that the mechanism of AO7 degradation in the Fe-N-BC/PS system included both radical and non-radical pathways involving the generation of OH, SO 4 − , O 2 − , 1 O 2 , and electron transfer. Additionally, persistent free radicals (PFRs) on the catalysts also related to their catalytic efficiencies. These results demonstrated that the Fe-N-BC/PS system had the potential for wastewater treatment applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2020
·
IF 0
Yun Shan,Hong-Lin Zhang,Yuan Zhu,Ying Wang,Huaju Song,Chuanguo Shi
An electrochemiluminescent immunosensor is constructed for the detection of diethylstilbestro (DES) on the basis of amplified quenching of electrochemiluminescence (ECL) from CdTe nanocrystal (NC)/reduced graphene oxide (rGO) composite films by antibody (Ab) against DES-modified SiO2 nanoparticles (Ab@SiO2). In this immunosensing system, CdTe NC/rGO composite films act as solid supporters for both DES and ECL emitters, which generate a 100-fold stronger ECL emission than CdTe NC films because the presence of rGO can lower the potential barrier, facilitate charge transfer, suppress nonradiative Auger recombination, and make the electron trap states fill more efficiently. On the composite films, the immobilized ovalbumin-modified DES (OVA-DES) competes with free target DES to bind Ab@SiO2. As a result, the number of formed OVA-DES-Ab@SiO2 immunocomplexes is inversely related to that of target DES. Using an ECL quenching maximum at blank as a calculation benchmark, the ECL intensity increment of the immunosensor and the concentration of target DES show a linear range of 0.002–2 ng/mL (R2 = 0.996) with a detection limit of 0.001 ng/mL (signal/noise = 3). This immunosensor, of good selectivity and stability, was used to detect beef samples, with recoveries at a scope of 93.2%–105.0%.
✓ 已验证
产品关联
DOI
DYES AND PIGMENTS
·
2020
·
IF 4.613
Yujiao Tu,Suping Wang,Xiaotian Yuan,Yunlin Wei,Kunhao Qin,Qi Zhang,Xuemei Chen,Xiuling Ji
The highly fluorescent nitrogen, phosphorus carbon dots ( Gl N,P-CDs) and G l CDs deriving from Ganoderma Lucidum were successfully prepared by a simple hydrothermal method . The Gl N,P-CDs exhibited low biotoxicity and good biocompatibility by cell imaging , onion skin staining and in vivo bioimaging . In addition, Gl N,P-CDs and G l CDs showed high selectivity and sensitivity in detecting 2,4-dinitrophenol (2,4-DNP) and 4-nitrophenol (4-NP). Good linear range 0–37.5 μM (R 2 = 0.9923) and 0–50 μM (R 2 = 0.9944) for Gl CDs, and 0–30 μM (R 2 = 0.9914) and 0–30 μM (R 2 = 0.9976) for Gl N,P-CDs were obtained, and the low detection limits were 89.77 nM, 100.27 nM ( Gl CDs) and 73.03 nM, 68.09 nM ( Gl N,P-CDs) for 2,4-DNP and 4-NP, respectively. It revealed that the inner filter effect dominated in quenching of the Gl CDs and Gl N,P-CDs fluorescent by 2,4-DNP and 4-NP. The Gl N,P-CDs was successfully used to detect 2,4-DNP and 4-NP in real water and soil samples. It provided a new insight on the bioimaging application and environmental pollutants detection.
✓ 已验证
产品关联
DOI
高影响因子
NANO
·
2020
·
IF 1.566
Suping Wang,Yujiao Tu,Kunhao Qin,Xiaotian Yuan,Wei Chen,Yunlin Wei,Zhiwei Xu,Qi Zhang,Xiuling Ji
Phenolic compounds, especially 4-nitrophenol (4-NP), and chromium (VI) are highly toxic environmental pollutants. Thus, it is significantly important to establish a rapid and sensitive sensor for 4-NP and Cr(VI) monitoring in environment. In this paper, a novel approach has been adopted where E. coli -derived CDs (CDs- WT ) prepared by one step hydrothermal method previously and sensitized by ampicillin (turn-on) were used as fluorescence nanoprobe (CDs- WT -Amp) for 4-NP and Cr(VI) determination based on the inner filter effect quenching mechanism (turn-off). Then, the quenching fluorescence was reversed by addition of ampicillin (turn-on). The linear ranges of 4-NP and Cr(VI) detection were 0–50 μ M and 0–25 μ M, with the limits of detection 88.89 nM and 64.75 nM, respectively. The “turn-on-on-off-on” fluorescent nanosensor system was successfully used to determine Cr(VI) and 4-NP in water with satisfactory results. It shows that the “turn-on-off-on” nanoprobe has great promising potential for application to environmental pollutant detection.
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2020
·
IF 14.588
Kuo Zhang,Pei-Pei Yang,Ping-Ping He,Shi-Fang Wen,Xiao-Ran Zou,Yu Fan,Zi-Ming Chen,Hui Cao,Zhou Yang,Kai Yue,Xinxin Zhang,Hua Zhang,Lei Wang,Hao Wang
Cancer therapeutic strategies based on angiogenesis attract great attention from fundamental and clinical research. Blocking oxygen and nutrition supply to tumor cells could inhibit the growth of tumors based on occlusion of blood vessels in the tumor. Herein, we report a dual-responsive peptide-based nanoparticle, mimicking the laminin fibrillogenesis specifically and highly efficiently in tumor vessels, resulting in the blockage of tumor vessels and the growth inhibition of tumors. The laminin mimic peptide (LMMP) is designed with a fibrillation sequence, a pH-responsive sequence, and a targeting sequence. The LMMP in nanoformulations is delivered to blood vessels in the tumors, where the microenvironment (pH and microthrombus) enable LMMP to process laminin fibrillogenesis, constructing fibrous networks. The laminin-like fibrous networks capture red blood cells etc., forming occlusion specifically in the tumor blood vessels to inhibit the growth of the tumor.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 32
·18572-18580
·
IF 3.119
Jiao Wang,Ting Wang,Xiaohui Liu,Yan Lu,Jingjing Geng
Multiple-responsive supramolecular vesicles have been successfully fabricated by the complexation between β-cyclodextrin (β-CD) and a pH/photo dual-responsive amphiphile 4-(4-(hexyloxy)phenylazo)benzoate sodium (HPB) with azobenzene and carboxylate groups. When mixing β-CD with HPB to reach a host/guest molar ratio of 1 : 1, the azobenzene group of HPB could be spontaneously included by β-CD molecules. Then, the formed inclusion complexes (HPB@β-CD) could self-assemble into vesicles, which was driven by the hydrophobic interaction of the alkyl chain of HPB and the hydrogen bonds between neighboring β-CDs. The reversible assembly/disassembly of the vesicles could be simply regulated under UV or visible light irradiation. The reversible phase transformation between vesicles and microbelts could also be realized by adjusting the pH values of the sample. Adding both competitive guest molecules (1-adamantane carboxylic acid sodium (ADA)) and α-amylase would result in the phase transformation from vesicles to micelles. Moreover, the vesicles would be destroyed when β-CD was continuously added until the ratio of host/guest reached 2 : 1. Such an interesting quintuple-responsive vesicle system reported here not only has potential applications in various fields such as controlled release or drug delivery, but also provides a reference for the design and construction of multiple responsive systems.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Environmental Science and Ecotechnology
·
2020
·
IF 0
Jing Ding,Lingjun Bu,Bingxin Cui,Guanshu Zhao,Qingwei Gao,Liangliang Wei,Qingliang Zhao,Dionysios D. Dionysiou
Bisphenol (BP) analogues in wastewater effluent and groundwater pose a potential threat to human health due to their ability to disrupt steroidogenesis. A new solar-assisted electrochemical process (SECP) was developed and evaluated for the degradation of BP analogues. The effects of quenchers, current density, initial pH, supporting electrolyte, and aqueous matrix on the removal kinetics of bisphenol AF (BPAF) and bisphenol A (BPA) were investigated. The kinetic constants of BPAF, BPA, and bisphenol S (BPS) in the SECP with irradiation intensity of 500 mW cm −2 were 0.017 ± 0.002 min −1 , 0.022 ± 0.002 min −1 , and 0.012 ± 0.001 min −1 , respectively. The changes in the degradation rates of BPAF, BPA, and BPS in the presence of quenchers indicated the relative contribution of hydroxyl radical ( ● OH) oxidation, anodic electrolysis, and singlet ( 1 O 2 ) oxygenation in the degradation of BPs in the SECP. The enhanced rate of generation of ● OH and 1 O 2 was observed in the SECP compared with those in the conventional electrochemical system. The identification of the transformation products (TPs) of BPAF demonstrated that hydroxylation, ring cleavage, β-scission, and defluorination were the major processes during the oxidation in the SECP. The conversion to fluoride ions (76%) and mineralization of total organic carbon (72%) in the SECP indicated further degradation of TPs. The results from this study improved our understanding of the degradation of BP analogues in the electrooxidation irradiated by solar light and help to establish the application potential of the SECP for the effective degradation of emerging contaminants in wastewater.
✓ 已验证
产品关联
DOI
PubMed
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Hang Li,Yi Zhai,Xubin Zhang,Guojun Lv,Yu Shen,Xuqing Wang,Tao Jiang,Yuzhou Wu
Hierarchical iron-containing TS-1 zeolites (FTS) were successfully synthesized via post-treatment desilication over microporous Fe-TS-1, which were prepared through a one-step hydrothermal synthesis. The prepared samples were characterized by X-ray diffraction, N2 adsorption–desorption, field-emission scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, ultraviolet visible spectroscopy, and X-ray fluorescence spectrometry. The experimental results illustrated that the MFI structure of all the FTS samples remained unchanged after NaOH desilication and acid treatment. The newly created mesopores can be controlled by changing the amount of framework Fe, as the extraction of Si could be affected because of the inhibitory effect of iron species during the desilication process. The catalytic performance of the prepared samples in phenol hydroxylation with H2O2 was investigated. Among all the samples, FTS-50-D showed a highest phenol conversion of 45.2% and a dihydroxybenzene selectivity of 95.2%. Besides, FTS-50-D also showed good reusability for five recycling tests.
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Jingcheng Liu,Zhen Zhou,Xunzheng Su,Jiancheng Cao,Mengjia Chen,Ren Liu
A series of multi-crosslinkable, self-healing coatings were developed to enhance the mechanical properties through tandem UV-curing and Diels-Alder (DA) chemistry. First, multi-arm UV-cured polyurethane (PU) pre-polymers (IPxH 12 ) were prepared based on cyclotriphosphazene monomer (H 12 ) with more benzene ring structure and half-blocked photosensitive oligomer. Then N, N'-(4, 4′-methylenediphenyl) bismaleimide (BMI) and furfuryl alcohol (FA) were used as the raw materials to prepare DA intermediate by Diels-Alder reaction. The DA intermediate was further reacted with methacrylic acid isocyanate (IEM) to obtain the modified I DA monomer (UV curable DA monomer, containing acrylic double bond). The structure of IPxH 12 and I DA was characterized by FT-IR and 1 H-NMR. UV-cured self-healing coatings were prepared by designing some coating formulations with the IPxH 12 , I DA and initiator. The self-healing properties and mechanical properties of the coatings were investigated. The results revealed that the hardness of the coating was up to 3H, and the introduction of I DA improved its self-healing performance, when the ratio of DA monomer to PU was 2:1, the repair effect was the best. The UV-curable self-healing coating has potential application in metal protection and other fields.
✓ 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）