Nanomaterials
·
2018
·Vol. 8
·期 5
·326
·
IF 3.504
Wu Wen,Biao Han,Feng Yan,Liang Ding,Bojie Li,Liansheng Wang,Lei Zhu
We describe here the preparation of copper nanoparticles stabilized on a chitosan/poly (vinyl alcohol) composite film. This material could catalyze the borylation of α,β-unsaturated acceptors in aqueous media under mild conditions. The corresponding organoboron compounds as well as their converted β-hydroxyl products were all obtained in good to excellent yields. It is noteworthy that this catalyst of copper nanoparticles can be easily recycled eight times and remained catalytically reactive. This newly developed methodology provides an efficient and sustainable pathway for the synthesis of organoboron compounds and application of copper nanoparticles.Keywords:chitosan composite film;copper nanoparticles;organoboron compounds;easily recyclable
研究领域:
化学
·
材料科学
·
催化反应
✓ 已验证
产品关联
DOI
PubMed
高影响因子
GREEN CHEMISTRY
·
2021
·Vol. 23
·期 13
·4866-4872
·
IF 10.182
Feng Tang,Yingzhan Li,Junwen Huang,Jinhong Tang,Xinyi Chen,Hou-Yong Yu,Ying Zhou,Dongping Tang
Cellulose nanocrystals (CNCs) have been widely used in various industries; however, green, efficient, low-cost and recyclable CNC preparation still presents great challenges. Herein, ferric chloride (FeCl3) solution was used as the solvent to develop a green and recyclable preparation system. Owing to the acidic environment provided by FeCl3, which is a Lewis acid, and the hydrolysis-promoting properties of Fe3+, the amorphous area of the cellulose could be rapidly hydrolyzed under a hydrothermal environment to produce CNCs. More importantly, the used FeCl3 solution could be reused after simple separation. Throughout the entire cycle, the solvent concentration and pH changed only slightly. In the scanning electron microscopy (SEM) results, the prepared CNCs showed a “rice-like” shape with typical CNC dimensions (diameter of ∼38 nm and length of ∼440 nm). The yield was ∼92%, which was much higher than the yields of previously reported methods of CNC preparation. Furthermore, the produced CNCs also have excellent thermal stability (Tmax = ∼350 °C). More importantly, the dispersal performance and large specific surface area of the CNCs were studied by using them as a support for PPy. Owing to the residual Fe3+, Py could polymerize uniformly on the surface of the CNCs. Overall, a green and economical method to achieve sustainable mass production of CNC is provided by this work.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Huifang Yao,Xiaxiao Dong,Hong Xiong,Jinwei Liu,Ji Zhou,Yong Ye
A facile cotton fabric with a built-in TLC-SERS structure was fabricated to demonstrate an integrated TLC separation and SERS identification of mixed dyes. The soft and flexible SERS fabric was firstly fabricated using a simple method in which gold nanoparticles were in-situ synthesized on cotton fabrics by heating. β-CD was then grafted onto cotton fabric through crosslinking with citric acid in presence of sodium hypophosphite monohydrate via esterification reaction. The adsorption and TLC development performance of β-CD grafted fabrics were comprehensively investigated with two organic dyes, one anionic dye and one nonionic dye. Besides, the recyclable adsorption and separation performance were tested to evaluate its sustainable application prospects. It displayed less adsorption capacity loss and reusable separation performance after several cycles than the pristine cotton fabrics. Finally, two sets of mixed dyes were successfully separated on the TLC fabrics and then identified via on-site SERS according to their different migration distance. The developed TLC-SERS fabric shows the advantage of quick, easy to handle, low-cost, sensitive, and could be exploited in on-site study of synthetic dyes in art objects, textile and packaging products or forensic applications.
研究领域:
分析化学
·
材料科学
·
光谱学
·
纺织工程
✓ 已验证
DOI
高影响因子
SusMat
·
2025
·
IF 21.3
Yu Bei,Yun Hu,Lihong Hu,Meng Zhang,Puyou Jia,Ye Sha,Yonghong Zhou
Lignin-based photothermal conversion materials provide effective solutions for advancing next-generation photothermal generators. However, recently reported lignin-based photothermal conversion materials face significant challenges due to poor mechanical strength, unstable solar energy collection, and difficulty in recycling. In response, high-performance photothermal materials based on lignin–tung oil covalent adaptive networks (LTs) are produced. The dynamic β-hydroxyl esters and multiple hydrogen bonds confer LTs with mechanical robustness, high adhesive strength, swelling resistance, and cycle processing performance. The π–π conjugation of aromatic rings imparts efficient photothermal conversion performance to LTs. Under xenon light irradiation (200 s, 1.2 W cm −2 ), LTs achieved a photothermal temperature exceeding 125°C. Furthermore, LTs demonstrated excellent maximum temperature stability over five light-heating and cooling cycles. The generator voltage remained stable within four cycles under leaf occlusion or real sunlight and could be artificially regulated when integrated into a thermoelectric generator. Consequently, the bio-based, mechanically strong, highly efficient, and stable-responding photothermal materials produced via a simple strategy hold significant potential for next generation solar thermal generators, suitable for industrial scale and large-scale production.
研究领域:
材料科学
·
高分子化学
·
能源材料
·
可持续材料
·
光热发电
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Shaolin Yang,Jinze Li,Cheng Zhen,Fangfang Li,Simiao Sha,Chunping Hou,Hui Lu,Jiandong Wu,Zhilin Sheng,Jinfu Ma
To achieve oil/water separation using both absorption and filtration regardless of the oil/water density relationship, the super-hydrophilic/underwater super-oleophobic graphene oxide coated melamine sponge (GO@MS) and super-hydrophobic/super-oleophilic reduced graphene oxide coated melamine sponge (rGO@MS) were prepared via dip-coating of graphene oxide (GO) sheets onto melamine sponge (MS) and subsequent chemical reduction, respectively. The structures of the GO@MS and rGO@MS were characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Raman spectra , and X-ray diffraction (XRD). Both GO@MS and rGO@MS can preserve their original wettability in harsh environments containing acidic, alkaline, saline, and hot waters . The GO@MS and rGO@MS show excellent capability for selective absorption of water and oil respectively, with high capacities of 72.3–136.5 g g −1 and excellent recyclability . The compressed GO@MS and rGO@MS also exhibit high separation efficiency of about 99% and ultra-high permeation flux above 1.62 × 10 5 L m −2 h −1 for separating different oil/water mixtures containing light and heavy oils through filtration driven by gravity, respectively. Furthermore, a bidirectional separation setup assembled with the compressed GO@MS and rGO@MS was constructed, which demonstrates high efficiency for continuously separating different oil/water mixtures of any oil density.
研究领域:
材料科学
·
环境工程
·
纳米技术
·
表面化学
·
分离科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Jia Yang,Cun Lv,Zhuoxin Wen,Meiqi Wang,Manman Zhao,Zhanxiong Li
A metal-organic framework material (MOF) ZIF-67 has proven to be an efficient metal-based catalyst by solution method. In this paper, the MOF composite nanofiber film was obtained by electrostatic spinning MOF and polyacrylonitrile (PAN). MOF composite nanofiber films which have controllable morphology were achieved by regulating process parameters, including electrospinning voltage, spinning liquid concentration, flow rate and blending ratio. The optimal process parameters were determined as follows: PAN concentration 10 wt%; PAN/ZIF-67 blending ratio 1:1; Voltage 8 kV; Flow rate 0.3 mL·h -1 and collective distance 18 cm. The fabricated films were well characterized using FTIR，XRD，XPS，SEM，WCA，BET，EPR and HPLC. The findings demonstrated that the PAN/ZIF-67 has a porous surface morphology. The catalytic degradation test showed that the composite nanofibers have excellent catalytic performance, which fully degraded twice the mass of methylene blue (MB) in 30 min. PAN/ZIF-67/PMS (mass ratio 1:1) which catalytic degraded the same mass of BPA need only 7 min. The PAN/ZIF-67 displayed outstanding recyclability, whose catalytic degradation ability, fracture strength and fracture elongation rate almost remained stable after the cyclic application. Additionally, the catalytic degradation mechanism of PAN/ZIF-67 was investigated and the result exhibited that the existence of SO 4 · - 、 OH - and 1 O 2 multi components catalyzed the degradation of MB/BPA. In particular, 1 O 2 has been identified as the primary active matter within the catalytic system. Simple fabrication, excellent catalytic degradation, and reusability enabled the prepared PAN/ZIF-67 to be highly promising for practical use in environmental protection.
研究领域:
环境科学
·
材料科学
·
催化
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Xiaodong Yang,Shuaiqi Luo,Jinfeng Zhou,Pengkai Sun,Yuanxia Guo,Jin Zhao,Kai Wang,Bowen Jiang,Tianyang Luo,Enshuo Zhang,Shengjun Zhao,Jianing Fang,Lili Wang,Ye Han,Fanming Zeng,Andrew R. Zimmerman,Bin Gao
New and sustainable approaches for the removal of cationic organic pollutants, such as methyl violet (MV) and methylene blue (MB) dyes, from aqueous solutions are needed. In this study, hickory wood was pyrolyzed with montmorillonite and then ball milled with dysprosium oxide at 350 rpm for 3 h, without any use of toxic compounds. The resulting composite was rich in oxygen-containing functional groups (e.g., carboxyl and hydroxyl), had uniform lamellar-porous micromorphology and a surface area (88.9 m 2 g −1 ) 2.5 times that of the original biochar. The composite exhibited excellent removal of aqueous methylene blue (113.6 mg g −1 ) and methyl violet (107.6 mg g −1 ), which was approximately 6.6 and 2.6 times that of the biochar. Modeling and characterization results suggest that the adsorption of cationic organic pollutants on the composite was controlled by multiple mechanisms including electrostatic attraction, hydrogen bonding, ion exchange, and surface complexation. After five regenerations, the composite maintained methylene blue (87.4 %) and methyl violet (84.8 %) removal ability, thus demonstrating good stability and reusability potential. These findings highlight the advantages and potential of ball-milled dysprosium oxide-loaded-biochar-montmorillonite composite for water treatment and environment remediation.
研究领域:
环境科学
·
材料工程
·
水处理技术
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 7
·1-11
·
IF 6.232
Guo Hao,Wu Ning,Xue Rui,Liu Hui,Wang Mingyue,Yao Wenqin,Wang Xiaoqiong,Yang Wu
An Eu(III)-functionalized strontium-organic framework (Eu 3+ @Sr-MOF) was synthesized by encapsulating Eu 3+ ions into the pores of Sr-MOF via postsynthetic modification (PSM) and fully characterized by XRD, SEM, EDS, FTIR, and TGA. The luminescent properties of Eu 3+ @Sr-MOF were measured and investigated in detail, which demonstrated that Eu 3+ @Sr-MOF not only possessed excellent water and chemical stabilities in a wide pH range (5–10) but also displayed red luminescence with excitation/emission maxima at 332/617 nm. The Eu 3+ @Sr-MOF can be considered as a highly selective and sensitive recyclable luminescence probe for sensing Cr(III) and Cr(VI) based on strong luminescence quenching effects; it can be recycled at least five times. The luminescence probe for Cr 3+ , CrO 4 2− , and Cr 2 O 7 2− shows low detection limits (0.15 μM, 0.17 μM, and 0.13 μM, respectively), relatively broad linear ranges (0.6–150 μM, 0.1–200 μM and 0.4–180 μM, respectively), and high quenching constants K SV . The signals can be observed by the naked eye under UV light of 365 nm. The method was applied to the determination of total Cr in environmental water samples.
Graphical abstract
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Xiaolin Yue,Can Cui,Shaolin Deng,Lan Wang,Ping Li,Anhong Li,Yizhong Zhang,Rui Hao,Wenyuan Tan
Currently, Zeolitic imidazolate frameworks (ZIFs) face challenges in antibiotic adsorption due to their inherent difficulty in recovery and susceptibility to hydrolysis. To overcome these limitations, herein, Mn-doped ZIF-67 was synthesized via coordination modification and then electrospun with high-mechanical-strength polyvinylidene fluoride (PVDF) to produce Mn-ZIF-67@PVP/PVDF composite nanofiber membranes. Characterization results based on SEM, XRD, and FT-IR analyses demonstrate that the layered nanofiber membrane provides abundant attachment sites for Mn-ZIF-67. Antibiotic adsorption experiments further reveal that the composite membrane exhibits facile recyclability, with Mn-ZIF-67 retaining 80 % of its initial adsorption capacity after five consecutive cycles, while maintaining its crystalline structure and remarkable aqueous stability throughout repeated utilization. The composite membrane achieved maximum adsorption capacities of 583.43 mg/g for tetracycline (TC) and 122.42 mg/g for ciprofloxacin (CIP). The adsorption process followed pseudo-first-order kinetics and Langmuir isotherm models, while thermodynamic analysis revealed a spontaneous and endothermic nature. The adsorption performance showed minimal impact from coexisting ions and pH variations. These superior characteristics of enhanced adsorption performance, exceptional water stability, and convenient recoverability endow the Mn-ZIF-67@PVP/PVDF composite membrane with significant practical advantages over conventional ZIF materials for antibiotic removal applications.
研究领域:
环境科学
·
材料科学
·
纳米技术
·
化学工程
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shitong Yu,Leilei Bie,Zhicheng Luo
Lignin is mainly composed of three basic C9 phenolic monomers, which makes it a formidable challenge to selectively produce C8 phenolic monomers, precursors for the ethylbenzene and styrene, due to intricate C–O and C–C cleavages. Here, we introduce a Ni 0.5% /AlN catalyst, featuring atomically dispersed Ni on a basic AlN support. The catalyst yields 52.7 % relative phenolic monomers with an unparalleled selectivity of 58.7 % for C8 phenolic species (Phenol, 4-ethyl, and Phenol, 4-ethyl-2-methoxy). The inherent basic sites within the AlN support crucially facilitate the formation of quinone intermediates, subsequently directed by single-atom Ni into C8 phenolic monomers. The catalyst showcases robust recyclability over five cycles, because of the strong interactions between Ni and AlN support. This study reveals a synergistic interplay between single-atom Ni and the basic support, paving a transformative pathway for the selective valorization of lignin.
研究领域:
化学工程
·
催化
·
可再生能源
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED ENERGY
·
2017
·
IF 7.182
Yanping Ren,Ruiyu Ding,Hairong Yue,Siyang Tang,Changjun Liu,Jinbo Zhao,Wen Lin,Bin Liang
Amine-functionalized nanomaterials have significant potential in CO 2 capture technology because of their low energy consumption, stable performance, and high regeneration capacity. Novel amine-functionalized adsorbents composed of copper silicate nanospheres (CSNSs) grafted with mono-, di- and tri-aminosilanes were synthesized for CO 2 capture. The synthetic process and formation mechanism were systematically investigated using transmission electron microscopy, X-ray photoelectron spectroscopy, fourier transform infrared spectroscopy, and N 2 physisorption analysis, etc. The copper silicates with rich surface hydroxyl groups, significant surface areas and mesoporous structures facilitated chemical modification of amines, leading to a high CO 2 adsorption capacity (a maximum CO 2 uptake of 47.88 mg/g) and excellent cyclic regenerability (maximum deviation of 3.51% after 20-times test) for CSNS-TA. In addition, the CO 2 capture process was carried out under relatively mild conditions, e.g., adsorption at 298 K, desorption at 373 K and ambient pressure , suggesting that these amine-modified CSNSs have potential as solid sorbents for CO 2 capture.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
iScience
·
2023
·Vol. 26
·期 9
·107608-107608
·
IF 5.8
Yujing Li,Huihui Luo,Shuo Wang,Lei Li,Guosong Li,Wen Dai
An unprecedented efficient protocol is developed for the oxidative cleavage of C≡C bonds in alkynes to produce structure-diverse esters using heterogeneous cobalt nanoparticles as catalyst with molecular oxygen as the oxidant. A diverse set of mono- and multisubstituted aromatic and aliphatic alkynes can be effectively cleaved and converted into the corresponding esters. Characterization analysis and control experiments indicate high surface area and pore volume, as well as nanostructured nitrogen-doped graphene-layer coated cobalt nanoparticles are possibly responsible for excellent catalytic activity. Mechanistic studies reveal that ketones derived from alkynes under oxidative conditions are formed as intermediates, which subsequently are converted to esters through a tandem sequential process. The catalyst can be recycled up to five times without significant loss of activity.
研究领域:
化学
·
材料科学
·
催化
·
有机合成
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）