Analytical Methods
·
2020
·Vol. 12
·期 17
·2237-2243
·
IF 2.596
Yujiao Tu,Suping Wang,Xiaotian Yuan,Pengfei Song,Yunlin Wei,Kunhao Qin,Qi Zhang,Xiuling Ji
Novel fluorescent nitrogen and phosphorus-doped carbon dots (Aa N,P-CDs) derived from Auricularia auricula were successfully prepared via a simple hydrothermal method. The Aa N,P-CDs showed high selectivity and sensitivity in detection of 4-nitrophenol (4-NP) and Ag(I) and good linear ranges of 4-NP (0–37.5 μM, R2 = 0.9967) and Ag(I) (0–25 μM, R2 = 0.9934). The low detection limits were 198 nM and 74.35 nM, respectively. This showed that static quenching dominated in Ag(I) quenching of the Aa N,P-CD fluorescence, while that of 4-NP was the inner filter effect. The Aa N,P-CDs were successfully used to detect 4-NP and Ag(I) in real water and soil samples. Cell imaging indicated that Aa N,P-CDs showed low biotoxicity and good biocompatibility, which provided a new insight into bioimaging application and environmental pollutant detection.
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2020
·
IF 4.613
Xiaotian Yuan,Yujiao Tu,Wei Chen,Zhiwei Xu,Yunlin Wei,Kunhao Qin,Qi Zhang,Yingying Xiang,Hongcai Zhang,Xiuling Ji
A highly photoluminescent small-size carbon dots (CDs) deriving ampicillin sodium were successfully obtained via one-step hydrothermal method . The prepared CDs showed uniform particle size and possessed good excitation-dependent characteristic. The dead bacteria and yeast cells could be selectively stained by the CDs, but the live ones not. It indicated that the CDs possessed a good potential for the live/dead bacteria and yeast differentiation. Cell and plant leaf imaging showed that the prepared CDs possessed low biotoxicity, excellent biocompatibility and multicolor fluorescence emission properties making it a good candidate for bioimaging application. The probe exhibited high selectivity and sensitivity to detect Hg(II) and 2,4-dinitrophenol (2,4-DNP), and excellent linear range of 0–50 μM for Hg(II) (R 2 = 0.9920) and 0–25 μM for 2,4-DNP (R 2 = 0.9919), with low detection limits of 33.40 nM and 13.44 nM for Hg(II) and 2,4-DNP, respectively. It revealed that dynamic quenching mechanism dominated in Hg(II) quenching the CDs fluorescent, while the quenching mechanism of 2,4-DNP detection belonged to the inner filter effect. The sensor was successfully applied to determine the Hg(II) and 2,4-DNP in real water samples. It shows that the fluorescent nanoprobe shows great promising potential for the detection of environmental pollutants.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 32
·18936-18944
·
IF 3.119
Shaoxiong Ye,Pan Feng,Wei Zhang
Cementitious solidification is an effective but time-consuming method for waste disposal, and the incorporation of polyacrylamide hydrogel in Portland cement paste is a simple way to enhance the time-efficiency of cementitious solidification. In this study, a series of Portland cement/polyacrylamide hydrogel (PC/PAM) composites suitable for the wastewater treatment were prepared by a one-pot method and their time-dependent reaction processes, mechanical properties and microstructures were tested. Based on the gelation time method, PC/PAM composites showed great solidification efficiency when treating simulated radioactive liquids, organic dye waste and solutions with strong alkalinity and acidity. At temperatures ranging from 5 °C to 40 °C, it took only a few minutes for these composites to solidify wastes. Also, PC/PAM composites containing wastes had a compressive strength that is more than 2 MPa after reacting for 3 days and were suitable for landfill or secondary treatments. The rapid gelation and sufficient strength development demonstrated that PC/PAM composites have great potential for application in solidifying multi-component wastes, especially in some emergency circumstances.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2020
·
IF 1.701
Yulian Jiang,Changming Zhao,Yue Wang,Tiexin Cheng,Guangdong Zhou
The interfacial properties of sodium para-dimethyl alkylbenzene sulfonate surfactant p-S14-41 (formula is C22H37SO3Na) at the oil-water interface in the presence of monovalent metal counterions (Li+, Na+, K+ and Cs+) are investigated by the spinning drop tensiometry. In the presence of monovalent metal counterions (Na+, K+ and Cs+), the interfacial tension (IFT) of oil-water first decreases and then increases with the increase of counterion concentration, while for Li+ concentration in the studied concentration range, the IFT decreases continuously. The reason why the latter (Li+) does not appear the optimum salinity is that the salt concentration is not high enough. The most noteworthy feature is that not only the different counterions affect differently the optimum salinity but also the concentration of p-S14-4 in the studied concentration range for the same counterion has no effect on the optimum salinity. Besides, the optimum salinity is affected by the electrostatic interaction, water-oil ratio (WOR), salting-out effect, and the hydrated radius of counterion, under the synergistic effect of which, the optimum salinity value order under various monovalent metal counterions is as follows: Li+ > Na+ > Cs+ > K+. The influence mechanism of counterions on the adsorption of p-S14-4 at the oil-water interface is also discussed in detail.
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2020
·
IF 4.613
Yujiao Tu,Suping Wang,Xiaotian Yuan,Yingying Xiang,Kunhao Qin,Yunlin Wei,Qi Zhang,Xuemei Chen,Xiuling Ji
The blue fluorescent nitrogen, phosphorus doped carbon dots ( Tg N,P-CDs) deriving from Thelephora ganbajun Zang were successfully obtained by hydrothermal method . Tg N,P-CDs possessed excellent fluorescence features and displayed strong blue fluorescence emission at 444 nm under 356 excitation with good water solubility. Tg N,P-CDs exhibited low biotoxicity and excellent biocompatibility by live/dead bacterial differentiation, cell imaging and onion epidermal staining. Furthermore, the nanoprobes showed high selectivity and sensitivity in detecting 2,4-dinitrophenol (2,4-DNP) and 4-nitrophenol (4-NP), and excellent linear range of 0–50 μM (R 2 = 0.9923) and 0–50 μM (R 2 = 0.9926) with low detection limits of 35.09 nM and 78.62 nM for 2,4-DNP and 4-NP, respectively. The Tg N,P-CDs was successfully applied to determine 4-NP and 2,4-DNP in real water and soil samples. It revealed that the inner filter effect quenching mechanism dominated in quenching of Tg N,P-CDs fluorescent by 2,4-DNP and 4-NP. It provides a new insight on the bioimaging application and environmental pollutant 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
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2020
·
IF 1.701
Long Wang,Zhiming Wang,Cuo Zhou,Weijun Song,Chunyan Sun
A cesium potentiometric microsensor based on magnetic ion-imprinted polymer (MIIP) has been developed for Cs(I) sensing. The core-shell structure Cs(I)-MIIP was synthesized by surface-imprinting technique, using functionalized magnetic Fe3O4@SiO2 microspheres, Cs(I) ion and carboxymethyl chitosan as supporter, template and functional monomers respectively. The resultant Cs(I)-MIIP was used as ionophore in the construction of the PVC membrane electrode to obtain a selective potentiometric microsensor toward Cs(I) ions. The fabricated sensor exhibited a highly sensitive Nernstian response (60.2 mV/decade) over the concentration range of 1 × 10−6 to 1 × 10−1 M of Cs(I). The response time of the microsensor was considerably short (less than 3 s) and its detection limit was determined as 3.0 × 10−7 M. The microsensor was effectively performed in the pH range of 4–6, and revealed desirable selectivity over a wide variety of other cations including alkali, alkaline earth and heavy metals. The proposed microsensor was also used for the determination of Cs(I) contents in the environmental water samples. The potentiometric results were in good harmony with the results obtained by the ICP-MS method.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 39
·13603-13611
·
IF 7.059
Shufang Wu,Wenbo Li,Junjie Hu,Peng Gao
Recently, compositional engineering of lead-free halide double perovskite materials (A2B+B3+X6) has attracted increasing research interest in terms of potential optoelectronic applications. Herein, antimony (Sb3+) ions are introduced to manipulate the structure and optical properties of Cs2NaBiCl6. Within the substitution range of 30%, the alloyed Cs2NaBi1−xSbxCl6 crystals maintain the pure double perovskite phase while exhibiting a gradually decreasing band-gap. Through controlled oxidation of Sb3+ ions, the samples, even at low alloy levels, show enhanced visible light absorption. An apparent color change from yellow to brown can be observed and ascribed to the increase of defect states. Meanwhile, the emissions of Cs2NaBi1−xSbxCl6 crystals turned gradually from the broad-band orange-red region to the blue-green region with the increase of the Sb3+ content. The dual-emission phenomenon can be attributed to the radiative recombination of self-trapping excitons activated by the excitation energy from the host lattice. This study augments the frontiers of halide double perovskites and deepens the understanding of optoelectronic tuning by atomic substitution. New possibilities in photovoltaics and white light emission applications could be envisioned.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2020
·
IF 6.289
Guanghui Liu,Ju Xu,Ruixing Li
Recently, nano-cesium tungsten bronze (Cs x WO 3 ) is found to be a new candidate for the application in solar filter due to its high visible transmittance and excellent near-infrared shielding ability. However, a typical two-dimensional (2D) Cs x WO 3 has not been reported since 2D nanomaterials have attracted great attention due to their fascinating properties, e.g., graphene. Herein, a novel synthesis system and related mechanisms are tried to develop for synthesizing 2D Cs x WO 3 via hydrothermal method, which an original inspiration derived from the morphology control of sulfides. The results indicate that morphology modifier represents a new strategy in which thiourea and oleylamine interact synergistically rather than independently to synthesize 2D Cs 0.3 WO 3 . The more regular and larger the rectangular nanosheet, the broader and stronger the light absorption, the rectangular Cs 0.3 WO 3 nanosheets with the maximum size are synthesized from thiourea, oleylamine and HCl concentrations of 4, 0.061 and 320 mmol/L, respectively, and exhibit a broad and strong absorption spectrum. The above nanosheet shows excellent instantaneous photo-thermal conversion property resulting in an obvious temperature increases from 20 °C to 88.5 °C when it was irradiated by 50 W halogen lamp for 10 s. Finally, both chemical reaction and morphological evolution in the synthesis processes are revealed.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Zihao Xu,Meng Rong,Qiyu Meng,Haoyu Yao,Shan Ni,Li Wang,Huifang Xing,Hongnan Qu,Liangrong Yang,Huizhou Liu
In this work, two hypercrosslinked hydroxyl-rich polymers (HCP-P and HCP-R) were facilely prepared through a one-pot Friedel-Crafts polymerization of phenol, resorcinol and formaldehyde dimethyl acetal, respectively. HCP-P and HCP-R were investigated for their ability to separate Cs + from the salt lake brine via ion-exchange reaction between Cs + and O − Na + . The Cs + adsorption isotherms of HCP-P and HCP-R follow the Langmuir model, and their adsorption capacities reach 249.64 mg g −1 and 259.97 mg g −1 , surpassing most of commercial materials like AMP-PAN (81 mg g −1 ) and TAM-5 (191.8 mg g −1 ). The Cs + /K + separation factors (S.F.) of HCPs can reach 12.4 even in the presence of high concentrations of K + (C (K + ) /C (Cs + ) = 712.5). Notably, HCPs could retain more than 90% of the adsorption capacities after 5 successive adsorption-desorption cycles. Besides, X-ray photoelectron spectroscopy (XPS), FT-IR spectra and TEM-EDS analysis revealed the ion exchange mechanism of the Cs + adsorption process. This work demonstrated the excellent application potential of hypercrosslinked hydroxyl-rich polymer adsorbents in separating Cs + from the salt lake brine.
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials and Nanotechnology
·
2020
·
IF 2
Shuhong Xu,Guangguang Huang,Chunlei Wang,Haibao Shao,Yiping Cui
In this work, we improved the photocurrent of self-powered ultraviolet photodetector via doping manganese in CsPbCl3 perovskite nanocrystals light harvester. The doped manganese in nanocrystals has the following three features to assist electron transfer from CsPbCl3 nanocrystals to titanium dioxide: (i) the fast exciton-to-manganese energy transfer process benefits for competing electrons with perovskite exciton recombination, (ii) the charge carrier lifetime is very long for manganese d-states due to its spin and orbital forbidden transition, and (iii) the electrons can effectively transfer to the titanium dioxide layer from 4T1 of manganese d-states due to the smaller energy barrier. Based on the above, the self-powered photocurrent density of photodetectors has nearly twice enhancement from 0.08 mA·cm−2 to 0.14 mA·cm−2 and a high responsivity up to 7.3 mA·W−1 was achieved at 340 nm.
✓ 已验证
产品关联
DOI
高影响因子
NANO
·
2020
·
IF 1.566
Yujiao Tu,Xuemei Chen,Yingying Xiang,Xiaotian Yuan,Kunhao Qin,Yunlin Wei,Zhiwei Xu,Qi Zhang,Xiuling Ji
Highly blue fluorescence carbon dots (CDs-MCM) were successfully prepared via a simple hydrothermal method with citric acid and ethylene diamine tetraacetic acid doped mesoporous silica MCM-41. The CDs-MCM exhibited uniform particle size and possessed good excitation-dependent characteristic. It showed highly selectivity and sensitivity in detection of Cr(VI), folic acid and good linear ranges of 0–37.5 μ M ( R 2 = 0 . 9 9 0 3 ) and 0–50 μ M ( R 2 = 0 . 9 9 4 9 ). The low detection limits were 79.31 nM and 118.73 nM for Cr(VI) and folic acid, respectively. It revealed that inner filter effect dominated in Cr(VI) quenching of the CDs-MCM fluorescent, while that of folic acid belonged to static quenching. The CDs-MCM were successfully used to detect the Cr(Vl) and folic acid in water and vegetable samples with satisfactory results. It provided new insight into environmental Cr(VI) and folic acid detection.
✓ 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）