Journal of Materials Chemistry B
·
2016
·Vol. 5
·期 6
·1155-1158
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IF 4.872
Zuguang Shen,Guocheng Han,Xiaoying Wang,Jiwen Luo,Runcang Sun
This study reported the direct utilization of bagasse as an ultra-light aerogel with AgNPs for the first time. Firstly, AgNPs were synthesized in situ using a green route with bagasse, a by-product of the refined sugar industry. During the reaction, the crystalline region of cellulose in bagasse was destroyed, and some groups of bagasse were partly oxidized into CO of ketone, which confirms the reducing capacity of bagasse. Then, the obtained bagasse–AgNP composite was dissolved in EmimAc to prepare an aerogel with AgNPs. The aerogel piled up in slices, and its weight after swelling in water was about 19 times the dry weight, and the aerogel did not crush a flower branch because its density was only 0.035 g cm−3, although the mole and mass ratios of the Ag atom were 5.26% and 29.94% in the aerogel, respectively. Furthermore, the obtained aerogel showed a strong antibacterial effect, especially against E. coli and P. aeruginosa. This study not only provides an interesting way for bagasse to be applied directly, but also develops an antibacterial biomass-based ultra-light aerogel without AgNP dissociation.
研究领域:
材料科学
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环境科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2019
·
IF 4.182
Yunpeng Hu,Chencan Du,Tao Wang,Guangsheng Luo
In this work, a highly efficient synthetic route for TS-1 zeolites has been developed in a flow system, a greener preparation method is further proposed by recycling the mother liquid. The prepared TS-1 by recycling the mother liquid contained no extraframework Ti species with uniform size and high crystallization as well as excellent catalytic performance for cyclohexanone ammoximation in the flow system containing a tubular reactor and an autoclave. As the fast heating rate of flow chemical process, the crystallization time was shortened to 20 min at 175 °C. Due to the short crystallization, hardly TPAOH participated in the Hofmann elimination reaction except for the structure-directing usage. The full recycle of remained TPAOH in the mother liquid was reused after being concentrated via vacuum distillation, and this novel recycling technology could have 98.5% TPAOH utilization as well as 98.3% TS-1 yield. These results indicate that the flow chemical process plays a key role in the new greener approach for the TS-1 synthesis.
研究领域:
化学工程
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催化材料
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2019
·
IF 6.395
Ze Lin,Xiulan Weng,Gary Owens,Zuliang Chen
Most environmental contaminants exist as a complex mixture of both metallic and organic pollutants and it is thus often a major challenge to remove both components simultaneously. In this paper, due to its low cost and environmentally friendliness, iron nanoparticles (Fe NPs) were successfully prepared using a one-step green synthesis for the simultaneous in-situ remediation of mixed contaminants. Specifically Fe NPs were used for the simultaneous removal of Pb(II) and rifampicin. The removal efficiency for Pb(II) and rifampicin were 100% and 91.6%, respectively. To better understand the mechanism of mixed contaminant removal by Fe NPs various characterization methods and the major conditions impacting removal efficiency were examined. It was concluded that (1) polyphenols and caffeine, both ubiquitous in green tea extracts, acted as both reducing and capping agents during the preparation of Fe NPs, reducing the agglomeration of Fe NPs and increasing their stability and reactivity; (2) the removal mechanism of contaminants involved Pb(II) being adsorbed onto the surface of Fe NPs due to the innate strong adsorption of metal ions onto iron oxides , while rifampicin and Pb(II) both interacted positively with the functional groups on the surface of Fe NPs. Overall, this study demonstrated that green synthesis Fe NPs had potential for use as inexpensive and efficient adsorbent for the simultaneous removal of both Pb(II) and rifampicin from wastewater.
研究领域:
环境科学
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纳米技术
·
生物学
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产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2019
·Vol. 322
·期 3
·2033-2042
·
IF 1.186
Li Wei,Liu Huijun,Li Liuxing,Liu Kai,Liu Juan,Tang Ting,Jiang Wenkang
In this paper, a green synthesized citric acid-crosslinked β-cyclodextrin polymer (CA-β-CD) was applied in removing uranium from aqueous solutions. Citric acid acts not only as cross-linker but also as functional groups for providing adsorption sites. The adsorption properties by varying experimental conditions were carried out by batch tests. The maximum adsorption capacity could reach 150 mg g −1 . Adsorption process was fitted better with the pseudo-second-order and Freundlich model. Thermodynamic studies proved that adsorption process was spontaneous and endothermic. More significantly, the polymer showed high selectivity for uranium and excellent reusability, demonstrating that CA-β-CD can be utilized as a promising adsorbent for uranium.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Qun Li,Guanzhong Zhai,Yan Xu,Tareque Odoom-Wubah,Lishan Jia,Jiale Huang,Daohua Sun,Qingbiao Li
Directly using natural materials as supporting material and reducing agent to obtain supported catalysts is significance along with the research of green and sustainable technologies. Herein, diatomite supported Pt (Pt/diatomite) catalysts were synthesized by the bioreduction method, through using Cinnamomum camphora (CC) leaf extract as reducing agent. As a result, the as-prepared 0.3% Pt/diatomite not only presented good benzene catalytic oxidation performance but also was catalytically stable and durable through long time on-stream, water vapor and carbon dioxide effect experiments. Through XPS, H2-TPR, H2-TPD, TEM, and in situ DRIFTS of CO adsorption analysis, it can be noticed that the high catalytic oxidation activity of 0.3% Pt/diatomite is attributed with more surface absorbed oxygen, good Pt dispersion and strong interactions between Pt and diatomite. Moreover, in situ DRIFTS of benzene oxidation experiments revealed that the hydrocarbon fragments were the intermediates during the process.
研究领域:
材料科学
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环境科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2018
·
IF 3.849
Fengxia Wang,Xiaobo Niu,Wei Wang,Wangli Jing,Yulong Huang,Ji Zhang
A green innovation strategy is performed to synthesize palladium nanoparticles (Pd NPs) using Cynomorium songaricum polysaccharide (CSP). The structure and properties of the as-prepared Pd NPs are characterized by a set of techniques, including transmission election microscopy, X-ray photoelectron spectroscopy, powder X-ray diffraction and cyclic voltammetry. The results show that Pd NPs are well dispersed with a mean size of 4.2 nm. As-obtained Pd–CSP/C electrode exhibits good stability and anti-interference ability for glucose detection in electrochemical studies. It can completely cover the normal blood glucose concentration with high sensitivities of 17.7 µA mM −1 cm −2 , and excellent stability during long-term electrochemical detection. Compared with the commercial glucometer, the relative deviation of the measured samples was equal to 5.0%. Significantly, this study offers an environmental friendly polysaccharide way for fabricating nanomaterials, which would develop more nanomaterials for various application fields in future.
研究领域:
材料科学
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生物化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2015
·
IF 2.912
Hua Xu,Xiupei Yang,Gu Li,Chuan Zhao,Xiangjun Liao
A simple, economical, and green method for the preparation of water-soluble, high-fluorescent carbon quantum dots (C-dots) has been developed via hydrothermal process using aloe as a carbon source. The synthesized C-dots were characterized by atomic force microscope (AFM), transmission electron microscopy (TEM), fluorescence spectrophotometer, UV–vis absorption spectra as well as Fourier transform infrared spectroscopy (FTIR). The results reveal that the as-prepared C-dots were spherical shape with an average diameter of 5 nm and emit bright yellow photoluminescence (PL) with a quantum yield of approximately 10.37%. The surface of the C-dots was rich in hydroxyl groups and presented various merits including high fluorescent quantum yield, excellent photostability, low toxicity and satisfactory solubility. Additionally, we found that one of the widely used synthetic food colorants, tartrazine, could result in a strong fluorescence quenching of the C-dots through a static quenching process. The decrease of fluorescence intensity made it possible to determine tartrazine in the linear range extending from 0.25 to 32.50 μM, This observation was further successfully applied for the determination of tartrazine in food samples collected from local markets, suggesting its great potential toward food routine analysis. Results from our study may shed light on the production of fluorescent and biocompatible nanocarbons due to our simple and environmental benign strategy to synthesize C-dots in which aloe was used as a carbon source.
研究领域:
分析化学
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食品安全
·
纳米材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
·
2017
·
IF 5.651
Zheng Cheng,Rendang Yang,Xu Liu,Xiao Liu,Hua Chen
Herein, bacterial cellulose (BC) was synthesized by acetobacter xylinum via organic acid pre-hydrolysis liquor of agricultural corn stalk used as carbon source. Acetic acid was applied to pretreat the corn stalk, then, the prehydrolysate was detoxified by sequential steps of activated carbon and ion exchange resin treatment prior to use as carbon source to cultivate acetobacter xylinum. Moreover, the recovery of acetic acid was achieved for facilitating the reduction of cost. The results revealed that the combination method of detoxification treatment was very effective for synthesis of BC, yield could be up to 2.86 g/L. SEM analysis showed that the diameter size of BC between 20 and 70 mm. In summary, the process that bacterial cellulose was biosynthesized via prehydrolysate from agricultural corn stalk used as carbon source is feasible, and the ability to recover organic acid make it economical, sustainable and green, which fits well into the biorefinery concept.
研究领域:
生物技术
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环境科学
·
可持续发展
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2017
·Vol. 24
·期 5
·1-6
·
IF 1.615
Hu Kai,Yuan Ye,Yan Peiyao,Zhou Changlin,Lei Jingxin
It is a challenge to simultaneously retain high performance and green synthesis process of polyurethane (PU). Here, a PU was synthesized completely using ethanol as solvent based on the chain extender, hexanediamine (HMD), with higher reactivity towards isocyanate groups than ethanol. Chemical components in PU prepared by a green process (GPU) were characterized by Fourier Transform Infrared Spectroscopy (FTIR). Molecular weight and its distribution of GPU were characterized by Gel Permeation Chromatography (GPC). Mechanical properties and thermal-mechanical properties of GPU were characterized by Electronic Tensile Testing Machine and Dynamic Thermomechanical Analysis (DMA) separately. The glass transition temperature (Tg) and thermal stability of GPU were characterized by Differential Scanning Calorimeter (DSC) and Thermogravimetric Analysis (TGA). Results showed that this GPU presented superior mechanical properties of 61.4 MPa and low saturated water absorption of 6.6% compared with conventional solvent-based PU and waterborne PU whose synthesis process contained some toxic organic solvent.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 54
·期 4
·2897-2907
·
IF 2.993
Wu Honge,Fang Ming,Fei Guang Tao,Hu Ze Min,De Zhang Li
LaF 3 nanocrystals (NCs) are usually used as good host matrix for down-conversion phosphors owing to their impressive photophysical properties. In this study, Pr 3+ -activated LaF 3 with hollow hexagon nanostructures (HHNs) is achieved by a green and eco-friendly hydrothermal method without any catalyst, template, or surfactant. The pore structure of the LaF 3 HHNs is greatly affected by the content of Pr 3+ ions and hydrothermal reaction time. The LaF 3 : Pr 3+ NCs excited by 467 nm light show strong emission peaks locating in visible light region (centered at 612 and 635 nm) and the first biological window region (existed in 689 and 721 nm), respectively. The relative photoluminescence (PL) intensity of LaF 3 : Pr 3+ NCs from 20 to 60 °C (biological temperature) decreases slightly and decreases only 20% at 120 °C. The PL emission intensity could reach the maximal value with doping ~ 1.5% Pr 3+ ions. Based on the outstanding photophysical properties, LaF 3 : Pr 3+ NCs will be used for both warm white light-emitting diodes and bio-imaging.
研究领域:
材料科学
·
光学
·
生物医学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Xiaoting Zhang,Mingyu Liu,Runping Han
In this study, a zirconium-based metal organic framework (UiO-66-NH 2 ) was prepared with a green synthetic method for removal of phosphate from solution. Several characterization methods were performed and the adsorption property of UiO-66-NH 2 toward phosphate was explored in batch mode. There was a good adsorption performance for phosphate with a wide range of pH (pH = 2–11) with a slight effect of salinity . The adsorption capacity was up to 43.9 mg·g –1 at 303 K from experiments. The adsorption isotherms can be better described by Langmuir, Temkin, and Koble-Corrigan model while adsorption kinetics can be well fitted by Pseudo-second-order, Double Constant and Elovich model. The process was spontaneous and exothermic and the major mechanism of phosphate adsorption was complexation. The spent adsorbent can be well regenerated using 0.01 mol·L –1 NaOH. The study shows that UiO-66-NH 2 has the potential to remove phosphate from solution.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Chengcheng Zhai,Mingwei Wang,Yanke Lu,Hongyuan Yan
Polycyclic aromatic hydrocarbons (PAHs) posed a serious threat to food safety and human health due to long-term emission. In this work, a new method was established using phloroglucinol-urotropine porous polymer (PU-PP) in a pipette tip for solid phase extraction (PT-SPE) for the first time and used prior to determination of four PAHs (phenanthrene, anthracene, fluoranthene, and pyrene) in lotus roots. Synthesis of the PU-PP adsorbent was green compared with alternatives; urotropine was used as a cross-linker and ethanol–water as the solvent. PU-PP-based PT-SPE had the advantages of low solvent consumption, good purification, practicability, stability, and low-cost. The proposed pre-purification method offered low limits of detection (0.09–0.28 ng/g) and good recoveries (84.6–114.3 %, RSDs ≤ 5.6 %) for determination of the four PAHs, which were detected at trace concentrations in samples. This new method provides an alternative for monitoring trace pollutants in aquatic plant ingredients.
研究领域:
食品安全
·
环境科学
·
分析化学
✓ 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）