OPTICAL MATERIALS
·
2021
·
IF 3.08
Xiaoyi Liu,Haiping Xu,Yunxiao Zhang,Zhendong Fu,Feng Hong,Ge Pang,Guixia Liu,Dan Li,Xiangting Dong,Jinxian Wang
Chrysanthemum-like K 2 LiAlF 6 :Mn 4+ phosphors were synthesized by simple co-precipitation method without using HF. The K 2 LiAlF 6 :Mn 4+ phosphor can be effectively excited through blue light at 465 nm, then produces sharp red-light emission near 634 nm. The luminescence quenching of Mn 4+ is caused by the d-d interaction between Mn 4+ ions. The effects of surfactant and lithium source on the luminescent properties of K 2 LiAlF 6 :Mn 4+ phosphors were discussed. Mn 4+ is located in a strong crystal field environment in the K 2 LiAlF 6 matrix and its emission mechanism is discussed. Warm white light emitting diode (WLED) device, which is fabricated by coating a certain proportion mixture of yellow YAG:Ce 3+ phosphor and red K 2 LiAlF 6 :5%Mn 4+ phosphor on the blue GaN chip, has low correlation color temperature (CCT = 3588 K), high color rendering index (R a = 90.8) and good electroluminescence stability under different currents. These properties illustrate that K 2 LiAlF 6 :5%Mn 4+ phosphor is a promising red light emitting material.
研究领域:
材料科学
·
光学工程
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产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2022
·
IF 3.574
Siyuan Tang,Xiameng Li,Changxing Wang,Tingting Li,Guoqiang Guo,Yiru Wang,Da Chen
Recently, the use of natural products for the synthesis of carbon dots (CDs) has received much attention due to its peculiar characteristics. Herewith, the novelty of our present work is the green, large-scale production of fluorescent nitrogen doped CDs (N-CDs) synthesized from the waxberry by simple hydrothermal treatment. The current method delivers a high yield of 71% and the N-CDs exhibits 484 nm emission wavelength for detection of morin. Meanwhile, the increase of morin concentration can cause significant color changes. Hence, an optical dual-mode sensor for morin detection in the range of 0–35 μM with a limit of detection (LOD) of 56 nM and a smartphone imaging method are developed, which will broaden the application range of N-CDs in on-site detection.
研究领域:
材料科学
·
分析化学
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环境科学
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产品关联
DOI
高影响因子
Micro & Nano Letters
·
2021
·Vol. 17
·期 1
·16-24
·
IF 1.102
Zhenpei Pang,Guidong Lin,Yuheng Wu,Hongmei Li,Yunhao Sun,Hongjun Zhou,Shenggen He
The green synthesis of nano-silver (NS) has gained increasing attention owing to its cost-effectiveness and environmental friendliness. Herein, a novel one-step green preparation method of stable NS aqueous solution using Tollens reagent as the silver ion source, D-fructose as the reduction agent, and polyvinyl pyrrolidone as the stabilizing and capping agent is reported. The prepared NS solution had a pH value of 7.10, with approximately spherical NS particles in the range of 13.95–87.36 nm. The resulting NS solution was stable under normal temperature, boiling water bath, and acidic environment. The NS solution had a remarkable absorption peak at 410 nm in its ultraviolet–visible spectrum. The dynamic light scattering/Zeta analysis showed the average particle size of the NS aqueous solution was 183.5 nm, polymer dispersion index was 0.282, and the zeta potential of the green synthesized NS was –18.0 mV. Moreover, the NS solution exerted a strong inhibitory effect on the growth of the bacteria isolated from the vase water of cut carnation ‘Prince’ flowers. These findings indicate that the obtained NS solution is potentially a practical and effective antibacterial agent for preserving cut carnations and other cut flowers.
研究领域:
植物学
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材料科学
·
微生物学
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Xingyilong Zhang,Houfang Lu,Man Zhang,Hui Han,Rubo Tian,Kejing Wu,Yingying Liu,Yingming Zhu,Bin Liang
Low-temperature production of 5-hydroxymethylfurfural (HMF) from fructose in ternary deep eutectic solvents (TerDESs) of choline chloride (ChCl), ethylene glycol (EG), and maleic acid (MalA) is proposed. A fructose conversion of 99.9% and an HMF yield of 87.3% are achieved in TerDES with ChCl/EG/MalA = 3:1:1 at 70 °C in 30 min. The ChCl can effectively activate the hydroxy groups of fructose by lengthening the C–O bonds. The EG can both improve the formation of ChCl–MalA DES with wide ranges of component ratios and reduce the viscosity of the DES. A reaction mechanism considering the synergistic effect of the components in TerDES is suggested to explain the enhanced dehydration of fructose under mild conditions. The recycling results of the TerDES show stable yields of HMF within five recycle runs. This work offers an efficient solution to a green and sustainable process for a high yield of HMF production.
研究领域:
化学工程
·
可再生资源利用
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Jia Ma,Jiang-Hua Zhang,Hua-Wei Zhang,Qian-Qian Du,Zi-Xuan Li,Zhi-Fei Yang,Sha-Sha Yang,Da-Yong Zhou
It is of great importance to develop a most efficient, recyclable, and ecofriendly process to produce novel structured phospholipid emulsifiers. Herein, innovative medium-chain structured phospholipid (MCSPL) emulsifiers were synthesized through transesterification of soybean lecithins with medium-chain fatty acids (MCFAs) promoted by Zn- or Al-incorporated Fe 3 O 4 @SiO 2 , denoted by Fe 3 O 4 @SiO 2 /M (M = Zn or Al). Resultingly, Fe 3 O 4 @SiO 2 /M (M = Zn or Al) exhibited the most superior reactivity with 97.1% or 88.7% MCFA incorporation to other benchmark catalysts and also had excellent magnetic separability and recyclability. Noticeably, targeted MCSPLs possessed almost more superior emulsifying properties to other phospholipid emulsifiers, and had potential for use as oil–in–water emulsifiers. Conclusively, the present findings demonstrate that transesterification promoted by Fe 3 O 4 @SiO 2 /M (M = Zn or Al) can be a promising approach for green, economic, and highly effective synthesis of novel dual-function phospholipid emulsifiers with bioactive and emulsifying properties in food, pharmaceutical, and cosmetic industries.
研究领域:
食品科学
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化学工程
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 20
·9771-9778
·
IF 3.3
Qin Zhang,Fang Guo,Run-Chi Zhao,Zhi-Hong Mo
Metal halide perovskite nanocrystals (PNCs) exhibiting excellent optoelectronic properties have been commonly synthesized by the ligand-assisted reprecipitation (LARP) method. However, the application of the LARP method for the large-scale production of PNCs is greatly hindered by the heavy use of the toxic antisolvent toluene and alkylamine ligand. In this study, ethanol was used as the antisolvent to synthesize CsPbBr3 PNCs at room temperature, which was enabled by simply using cyclodextrin (α-CD) as the ligand. The proposed method could produce α-CD@CsPbBr3 PNCs with a size of 35.0 ± 0.6 nm, a photoluminescence quantum efficiency of 86.0 ± 0.1%, and a yield of 33.4 ± 0.6% (5 batches). In addition, the obtained α-CD@CsPbBr3 PNCs could persist for 6 months in ethanol with a loss of luminescence of less than 10%. The effective generation, high reproducibility, and long-term stability of the PNCs were contributed from the strong interaction between α-CD and CsPbBr3 and the poor solubility of α-CD in ethanol, which resulted in a firm enclosing of CsPbBr3 crystals within α-CD molecules. Additionally, the anion exchanges of the α-CD@PNCs were rapidly achieved in ethanol by using common salts of KI and NaCl. Using a non-toxic and low-cost antisolvent and ligand, this method is more eco-friendly and economical than ever.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2023
·
IF 2.7
Gholipour Arsalan,Rahmani Shahrzad
In the current study, the fluorescent Carbon quantum dots (CDs) were synthesized through one-step hydrothermal approach by orange juice without any additional agents. The as-prepared green-CDs (GCDs) were quasi-spherical shape ranged from 2 to 8 nm with an average diameter of 5 nm, and emitted bright blue fluorescent (FL) under ultraviolet light irradiation (Uv). Different detailed analyses proved that the as-prepared GCDs had good morphologies, various functional groups, high water solubility, great optical features, and excellent stability towards diverse environmental conditions. The results indicated that the as-prepared GCDs can detect different concentrations of dopamine from 1 to 100 µM based on the quenching of their native fluorescent. Furthermore, the good linear relationship was obtained for dopamine in the broad range of concentrations from 1 to 100 µM with the limit of detection (LOD) of 0.81 µM. In addition, the as-prepared GCDs can be applied as a fluorescent probe for detection of dopamine in the different real samples.
研究领域:
分析化学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS
·
2016
·Vol. 230
·期 12
·1711-1718
·
IF 1.183
Ning Xiang,Jiguo Huang,Honggang Zhao,Chengjia Liu,Xingjuan Liu
A green and simple chemistry approach was demonstrated to prepare reduced graphene oxide (rGO) using sodium humate (SH) as the reducing agent. Without using toxic and harmful chemicals, this method is environmentally friendly and suitable for the large-scale production of graphene. At first, the improved Hummers method to oxidize graphite for the synthesis of graphene oxide (GO) was applied, and then the as-prepared GO was reduced by SH to form rGO. Characterization was performed using Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectrometry (XPS) and Raman spectra. The intensity ratio of the D and G band (I D /I G ) of GO after reduction with SH increases from 0.96 (GO) to 1.11 (rGO), the results obtained from the Raman spectra proved high purity of the final products.
研究领域:
材料科学
·
环境化学
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DOI
高影响因子
TOXICOLOGICAL AND ENVIRONMENTAL CHEMISTRY
·
2016
·
IF 0.634
Xirui Lv,Yue Zhou,Anguo Zhang,Lihong Zhou,Qingle Zeng
A straightforward and environment-friendly protocol for the synthesis of valuable chiral N-(tert-butylsulfinyl)imines has been developed. Different from traditional process with benzaldehydes as substrates, arylmethyl alcohols, benzylthiol, dibenzyl ether, thioether, and disulfide are used as alternative substrates to react with tert-butanesulfinamide in the presence of KOtBu under air for the synthesis of chiral N-(tert-butylsulfinyl)imines. This is a transition metal-free, mild, cost-effective, and simple process.
研究领域:
有机化学
·
环境化学
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2022
·
IF 3.841
Morvarid Najjar,Mohammad Ali Nasseri,Ali Allahresani,Majid Darroudi
In this work, carbon quantum dots (CQDs) were synthesized through a simple and green hydrothermal method with the usage of green materials. The synthesis of CQDs was confirmed by the results of various analyses such as XRD, EDX, FT-IR, and UV–Vis, while their size and morphology were determined by the TEM and FESEM images. This product contained a pseudo spherical morphology with an average size of 2.2 nm. The good photoluminescence (PL) intensity and quantum yield (QY) of the CQDs were confirmed using the PL spectra. Furthermore, the photocatalytic activity of the prepared CQDs was examined in the degradation of the four organic dyes including methylene blue (MB), crystal violet (CV), methyl orange (MO), and eriochrome black T (EBT) under UV irradiation, while the effective parameters including pH, amount of photocatalyst, and dye concentration were optimized.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 28
·285705
·
IF 3.953
Yu Zhang,Qiang Liu,Yu Liu,Jin Tong,Zhongwei Huang,Song Wu,Peilin Liang,Guannan Yang,Chengqiang Cui
A green method for the synthesis of in situ Cu paste is developed. Cu particles are prepared through chemical reduction by selecting a special copper source, reducing agent, and solvent. Then the reaction solution is directly concentrated to obtain an in situ Cu paste. The synthesis of Cu particles and the preparation of Cu paste are conducted simultaneously, and the process of separation, purification, drying, storage, and re-dispersion of powder are reduced. Particles are not directly exposed to air, thus the oxidation of micro/submicron -Cu is effectively prevented, and the agglomeration of particles caused by drying and dispersion operations is simultaneously reduced. Furthermore, the proposed method has a certain universality, and different types of Cu sources can be used to prepare in situ paste with different sizes and morphologies. The entire preparation process is simple, efficient, green, and the yield can reach 99.99%, which breaks through the bottleneck of the application of traditional micro/submicron-Cu materials. Copper acetate-based in situ paste is sintered for 30 min at 260 °C and 2 MPa in a reducing atmosphere. The shear strength, resistivity, and thermal conductivity reach 55.26 MPa, 4.01 × 10–8 Ω·m, and 92.75 W/(m·K), respectively, which could meet the interconnection application of power semiconductor devices.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2018
·Vol. 18
·期 12
·8085-8093
·
IF 1.354
Qi Jianrong,Hu Meixin,Li Hongxia,Jing Ruan,Shen Guangxia
Due to the dual role as an electron acceptor and an electron donor in solution, carbon dots (Cdots) have broad applications in environmental analysis, biological detection, and biosensors. Herein, we report a facile-green strategy for a large-scale synthesis of fluorescent N, P-doped
carbon dots (N, P-Cdots) with an absolute quantum yield of 66.08% by a simple one-step thermal decomposition. Glucose was selected as a carbon precursor and tryptophan (Trp) as an N-doping and passivation reagent. Organic polar solvents with a high boiling point, i.e., ethylene glycol and
glycerol, were used as the reaction medium, and phosphoric acid was employed as a P source and oxidation accelerator. It is shown that the emission wavelength of the N, P-Cdots can be tuned by adjusting the reaction conditions, such as mass ratio, heating time, temperature, and medium, without
further passivation. Finally, advantage was taken of the superior fluorescent characteristics of N, P-Cdots to detect selectively and with high sensitivity a cancer marker, carcinoembryonic antigen (CEA), based on the fluorescent quenching mechanism. Additionally, CEA was also detected in
human serum samples with high efficiency and RSD, further confirming that the proposed method has a good consistency and stability for supersensitive fluorimetric detection of cancer markers.
研究领域:
分析化学
·
生物医学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）