Journal of Environmental Chemical Engineering
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2020
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IF 4.3
Xiaofeng Huang,Qiulin Deng,Huiwei Liao,Hongquan Deng,Jinlong Jiang,Lixiong Zhang,Xinjun Yao
The treatment process of metal plating wastewater in industry usually exists excessive consumption of chemicals, coproduction of sludge and complex reuse of metal. At present, some available technologies have been designed for effective removal of specific metal ions rather than entire metals ions in effluents. Herein, a novel strategy of treating waste with waste is proposed that using metal plating wastewater containing Zn(Ⅱ) to prepare 3D Luffa cylindrical (LC) / heterogeneous ZIFs (h-ZIF-8) composite (LC/h-ZIF-8) for photocatalytic degradation of organic pollutants (Nitrofurazone (NFZ), Methylene blue (MB), Rhodamine B (RhB) and Congo red (CR)) and mixed-dye wastewater. The strategy realized the efficient treatment of electroplating wastewater, expediently reuse of metal ions and removal of organic contaminants . Moreover, investigations of cycling performance indicated the photocatalytic stability and easy separation from water. Furthermore, the spectroscopy and electrochemical are employed to elaborate possible degradation mechanisms, expounding the LC/h-ZIF-8 possess lower recombination rates of carriers and transfer resistance of electron compared with ZIF-8. Therefore, the work proposes a new strategy for the efficient treatment of metal wastewater and achieves the combination of resource recovery and wastewater treatment with the advantages of simple operation and mild conditions.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
EUROPEAN POLYMER JOURNAL
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2014
·
IF 3.242
Bolin Li,Xiaolin Lu,Yonghao Ma,Zhan Chen
A novel thermo- and pH-responsive poly(acrylic acid) (PAA)/poly(4-vinylpyridine) (P4VP) aqueous material with an upper critical solution temperature (UCST) was developed in this study. It was found that the formation of the aqueous complex material was caused by the deprotonation of pyridinium groups of P4VP molecules and consequent hydrogen bonding formation between pyridine and carboxylic groups. This aqueous material exhibited significant reversible transition behaviors between the turbid colloidal and transparent solution states upon altering the pH and temperature values. Furthermore, the correlation between the solution pH and the upper critical solution temperature (UCST) enables us to design responsive aqueous materials with a broadly adjustable transition temperature range.
研究领域:
高分子化学
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材料科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Peiyi Jin,Linzhou Chen,Jinjian Zhong,Tiefeng Yuan,Lin Gan,Jilong Huang,Liping Wang,Huajun Fan,Chen Lin
Dioscoreae nipponica Makino ( D. nipponica ) as the rhizome of dioscoreaceae rich in steroidal saponins, has been reported to have the hypolipidemic effects etc. However, it is still unclear which exact active components are primary responsible for the beneficial effects. This study was conducted to fish out the lipase inhibitors from D. nipponica , and evaluate the inhibitory activity on porcine pancreatic lipase (PPL) through in vitro kinetic assay using p -nitrophenyl palmitate as substrate. Accordingly, the ethanolic extract was subjected to D101 macroporous resin purification for spectrophotometric screening, high performance liquid chromatography (HPLC) separation and structural characterization by ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry. Through orlistat validation, the PPL inhibitory activity and IC 50 value of the extract were respectively 68.34 ± 1.47 % and 107.05 μg/mL under the optimized inhibition conditions. From 6 steroidal saponins identified, the inhibitory components named the protodioscin, protogracillin, dioscin and gracillin were fished out by grouping separation and HPLC analysis. Furthermore, dioscin and gracillin with the parent structure of diogenin were confirmed as the major inhibitors by virtue of stability tests based on transformation of protodioscin and protogracillin. Finally, the inhibitory mechanism of the major inhibitors toward PPL was further clarified by kinetic analysis and molecular docking analysis. The proposed method not only revealed the PPL inhibitory components in D. nipponica , but also provided an effective approach to hierarchical screening of PPL inhibitors from natural plants.
研究领域:
药理学
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生物化学
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分析化学
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天然产物
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DOI
PubMed
高影响因子
FUEL
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2022
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IF 8.035
Mingjia Zhang,Shule Zhang,Fanyu Meng,Mengjie Hu,Zhongyu Wang,Yiqing Zeng,Qin Zhong
Promoting the formation of Ti-OOH in the TiO 2 -based-catalyst/H 2 O 2 /O 3 system is critical to further develop the catalytic peroxone process for low-temperature flue gas denitration. In this study, a series of phosphorus-doped TiO 2 with rich Lewis acid sites and high stability was designed and established, achieving 94 % NO oxidation efficiency with less oxidant (373 K, H 2 O 2 /NO = 1.2, O 3 /NO = 0.5) and high GHSV (1.2 × 10 5 h −1 ). Combining characterizations and DFT results, a possible mechanism was proposed: phosphorus-doping enhanced the Lewis acidity, which was conducive to the adsorption and activation of H 2 O 2 . Moreover, P-TiO 2 significantly promoted the H 2 O dissociation and Ti-OOH formation process by reducing the energy barrier, thereby promoting the synergistic effect between O 3 and Ti-OOH. The semi-in-situ UV–vis DRS demonstrated that the catalytic peroxone process occurs at the solid–liquid interface and the Ti-OOH is consumed in the catalytic process. We hope this work provide a new investigation method and insight into the catalyst design.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF SUPERCRITICAL FLUIDS
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2023
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IF 3.9
Wei Guo,Ben Li,Haijun Chi,Zhongliang Jiang,Liu Qing Wei,Edward D. Ramsey
Two flow selection interfaces have been developed for connecting single or linked reactors with on-line SFC equipped with UV/Vis diode-array (DAD) and mass spectrometer detectors coupled in series (SFC-DAD-MS). This process analytical technology system, enabled the study of reactions performed in supercritical fluid carbon dioxide (SF-CO 2 ). Each interface is designed to obtain on-line samples at different reaction progress points. Three single stage electrophilic annulation reactions performed in SF-CO 2 using aniline, indole and pyrrole as amine reactants to synthesize N-heterocyclic products within a stirred continuous flow reaction vessel containing montmorillonite K-10 catalyst were monitored. Also, both stages of a two step synthetic procedure conducted within two connected continuous flow reaction coil systems were monitored using on-line SFC-DAD-MS. The first step involved a Knoevenagel reaction in SF-CO 2 that provided a continuous feed to perform a second stage acetylation reaction. Use of on-line SFC-DAD-MS enabled early detection and characterization of unexpected by-products.
研究领域:
化学工程
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分析化学
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产品关联
DOI
高影响因子
VACUUM
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2023
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IF 4
Chaoqun Yan,Zhiliang Cheng,Xuan Zhang,Juan Wei,Qian Xu
The photocatalytic efficiency of hematite (α-Fe 2 O 3 ) is limited by its photoexcited state lifetime and diffusion length. By adjusting the surface structure, the photogenerated electron pairs can migrate to the surface and the charge recombination can be suppressed, which can effectively solve these problems and improve the photo-Fenton performance. In this study, four kinds different morphologies of α-Fe 2 O 3 - x (truncated hexagonal bipyramidal, cubic, hexagonal shape, and spherical) were synthesized by hydrothermal method , and a photocatalyst (H-α-Fe 2 O 3 - x ) with higher catalytic activity was prepared by hydrogenation. The results of UV–Vis DRS , PL , Raman, and XPS analysis , the oxygen vacancies and Fe (II) species were introduced into the α-Fe 2 O 3 catalyst after the hydrogenation reaction. The H-α-Fe 2 O 3 - x showed good degradation performance for TC and DX as EMPs model pollutants. The results show that the formation of oxygen vacancy and Fe 2+ is the main factor to improve the photocatalytic activity of the reaction system. Furthermore, the reaction mechanism revealed that reactive radicals involved in the H-α-Fe 2 O 3 - x photocatalytic system were •OH, •O 2 − , and h + responsible. This study provides an alternative technology for an easy and effective means for bandgap engineering to improve the photocatalytic performance of photocatalysts and facilitate widening environmental application.
研究领域:
环境科学
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材料科学
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化学
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光催化
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DOI
高影响因子
Nanoscale
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2022
·Vol. 14
·期 45
·16893-16901
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IF 8.307
Hai Zhong,Hongfang Yang,Jiaqi Shang,Biao Zhao,Jianping Deng
Micro/nanoparticles with surface microstructures have attracted tremendous attention due to their fascinating structures and properties. Herein, we present the first strategy for producing optically active polymer particles with varying surface microstructures via a template surface modification process in which achiral particles act as the template and helical substituted polyacetylene acts as the chiral component. To prepare the designed chiral-functionalized particles, template particles were first reacted with propargylamine to produce alkynylated template particles. The alkynylated templates further participated in the polymerization of chiral alkyne monomers through a surface grafting precipitation polymerization approach, resulting in achiral particles with surface microstructures covalently bonded with a chiral helical polymer. SEM images ascertain the production of chiral-functionalized particles showing various shapes (jar-like, golf ball-like, and raspberry-like particles). Furthermore, CD and UV-vis absorption spectra demonstrate that the grafted polyacetylene chains adopt a predominantly single-handed helical conformation, thereby affording composite particles with optical activity. Using the established protocol, numerous advanced chiral-functionalized micro/nanostructures are expected to be designed and constructed.
研究领域:
材料科学
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高分子化学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2023
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IF 4
Zishuang Guo,Menghui Deng,Haiwang Wang,Xiao Xiang,Chengang Zhang,Bingzhu Wang
In this paper, the microstructure evolution of polymeric carbon nitride was investigated and Au ions was used to improve its photocatalytic efficiency. Their structures were investigated by FT-IR, XPS, XRD , SEM and TEM. Their specific surface area and aperture distribution were measured by BET. Meanwhile, the energy band structure and electron-hole separation efficiency were analyzed by UV–Vis and PL spectroscopy. In addition, the photocatalytic performance of the photocatalysts was assessed by photocatalytic degradation of RhB and photocatalytic hydrogen evolution . The results showed that 600-PCN possessed the best photocatalytic performance, with a degradation rate of 46.92 % in 150 min. What's more, the degradation rate of RhB solution by 2 % Au/PCN reached 47.88 %, which was 2.17 times higher than that of 550-PCN (22.01 %). During the degradation process, h + oxidatively degrade RhB. The hydrogen production rate of 2 % Au/PCN was about 11.658 μmol/g/h, which was 41.23 times higher than that of 550-PCN (0.282 μmol/g/h).
研究领域:
材料科学
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化学
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催化
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纳米技术
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2024
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IF 4
Qifeng Chen,Yu Yao,Shuo Zheng,Qianhong Shen,Libei Jiang,Qinhua Fang,Hui Yang
A novel Yb 3+ /Er 3+ co-doped BiOBr photocatalyst with 3D flowerlike hierarchical architectures were successfully fabricated through self-assembled process without any templates under hydrothermal conditions, and the structure and properties of the photocatalysts were characterized. The results indicate that Yb 3+ ions and Er 3+ ions are successfully doped into the lattice of BiOBr, and the as-obtained photocatalyst can respond the NIR light and emit red and green light due to the up-conversion effect of the rare-earth ions. Meanwhile, with co-doped Yb 3+ /Er 3+ ions content increasing, oxygen vacancy concentration in the photocatalyst rises. The oxygen vacancy will form the intermediate energy band, which can decrease the photon energy required for electronical transition, and thus help to utilize the luminous energy generated by up-conversion luminescence. Moreover, the appropriate introduction of defects (oxygen vacancy defect and impurity atom) can further promote the transfer and separation efficiency of photo-generated carriers. Hence, Yb 3+ /Er 3+ co-doped BiOBr photocatalyst exhibits enhanced photocatalytic properties under broad spectrum (UV/vis/NIR) excitation, which is about 4 times as high as that of pure BiOBr.
研究领域:
材料科学
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光催化
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纳米技术
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光电
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
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IF 6.182
Ning Li,Xueyun Gao,Haikuan Fan,Yangqin Gao,Lei Ge
Effective and suitable utilization of solar energy was achieved using a full-spectrum-response photocatalyst AgBr/Cs x WO 3 , applied in the photocatalytic and photochromic field. Benefitting from near-infrared (NIR) absorption ability of Cs x WO 3 , AgBr/Cs x WO 3 exhibits enhanced visible-near-infrared (Vis-NIR) driven photocatalytic activity. Based on X-ray photoelectron spectroscopy (XPS), photoluminescence spectra (PL), and the photoelectrochemical analysis, AgBr and Cs x WO 3 formed a Z-scheme system at the interface to efficiently separate and transfer photo-induced electrons at a fast rate. The quenching experiment and the electron spin resonance (ESR) tests indicated that the photocatalytic reaction is activated by the production of superoxide radicals. Furthermore, the photochromic analysis to different light exhibits the AgBr/Cs x WO 3 heterostructure is stable under visible light with negligible photodeposition of AgBr, and has excellent double photochromic activity with visible-shielding effect of AgBr to Ag 0 and infrared-blocking effect of Cs x WO 3 under ultraviolet light. This research provides new insights into the manufacture of energy-efficient and environmentally friendly materials that provide excellent performance in both thermal insulation and decontamination.
研究领域:
材料科学
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物理化学
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纳米催化
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光化学
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功能材料
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环境净化
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能源材料
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DOI
高影响因子
FOOD CHEMISTRY
·
2025
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IF 9.8
Jing Feng,Sheng Yao,Xiaohan Mei,Jiacheng Xie,Xujie Wang,Huitian Zhi,Ruhui Shang,Yingchao Yang,Lei Hu,Zhengquan Yan
To conveniently monitor and remove toxic Hg 2+ and S 2− in food samples, Au Ag quantum-dot nanozyme (Au-Ag@FA QDs) was identified. The strong synergistic effect among folic acid (FA), Ag and Au endowed Au-Ag@FA QDs with superior peroxidase-mimic activity to accelerate 3,3′,5,5′-tetramethylbenzidine (TMB) redox with K m / V max of 0.28 mmol·L −1 /6.40 × 10 −8 mol·L −1 ·s −1 . Trace Hg 2+ or S 2− could selectively alter its peroxidase-like activity and inherent fluorescence performance, with obvious hyperchromic/“turn-on” fluorescent effect for Hg 2+ or hypochromic/“turn-off” one for S 2− . And red-green-blue (RGB) values analyzed from smartphones changed regularly with c Hg 2+ or c S 2− . Under the optimized conditions, Au-Ag@FA QDs were successfully applied for multi-mode UV–vis, fluorescent, and RGB monitoring of Hg 2+ or S 2− in food samples. The detection limits were 7.38 × 10 −7 /5.74 × 10 −8 /4.93 × 10 −6 g·L −1 and 1.99 × 10 −6 /4.48 × 10 −8 /5.79 × 10 −6 g·L −1 respectively. Importantly, over 93.8 % Hg 2+ or 90.5 % S 2− could be removed by simple centrifugal-separation after detection. The selective recognition mechanisms to Hg 2+ and S 2− were also proposed.
研究领域:
生物化学
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食品安全
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纳米技术
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产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 7
·1-11
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IF 5.479
Xing Xinxin,Yang Yue,Zou Tong,Wang Zhezhe,Wang Zidong,Zhao Rongjun,Zhang Xu,Wang Yude
Thioglycolic acid-functionalized ZnSe quantum dots (QDs) as a colorimetric nanoprobe were prepared and applied to the determination of cobalt(II) and iron(III). Test strips were obtained by a dipping-drying process. On exposure to Co(II), they undergo a color change from white to brown, and on exposure to Fe(III) from white to pink. The limits of detection (LOD) are 2.6 mg L −1 for Co(II) and 2.2 mg L −1 for Fe(III). Test strips introduce a low-cost, portable, rapid and convenient tool for determination of Co(II) and Fe(III). In addition, two other analytical methods have been studied for detection of Co(II) and Fe(III) at low concentration. The first is UV-vis spectrometry which has a LOD as low as 0.14 mg L −1 for Co(II) (at 412 nm) and 0.12 mg L −1 for Fe(III) (at 400 nm). The second is dynamic light scattering (DLS) with a LOD of 3.0 μg L −1 for Co(II) and 2.5 μg L −1 for Fe(III).
Thioglycolic acid-functionalized ZnSe quantum dots (TGA-ZnSe QDs) show high sensitivity and low detection limits for Co 2+ and Fe 3+ .
研究领域:
分析化学
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纳米技术
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环境科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）