CHEMOSPHERE
·
2023
·
IF 8.8
Guobo Li,Yaping Zhang,Peng Wu,Kai Shen,Shule Zhang,Shipeng Ding
The synergistic degradation of VOCs and NO x that were emitted from the incineration of municipal and medical wastes by a single catalyst is challenging, due to the poor activity at low temperatures, and the SO 2 poisoning on the active sites. Herein, N-doped TiO 2 (N–TiO 2 ) was used as the support for designing a highly efficient and stable catalyst system for CB/NO x synergistic degradation even in the presence of SO 2 . The prepared SbPdV/N–TiO 2 catalyst, which presented excellent activity and tolerance to SO 2 in the CBCO + SCR process, was investigated by a series of characterizations (such as XRD, TPD, XPS, H 2 -TPR and so on) as well as DFT calculations . The electronic structure of the catalyst was effectively modulated after N doping, resulting in effective charge flow between the catalyst surface and gas molecules. More importantly, the adsorption and deposition of sulfur species and reaction transient intermediates on active centers were restrained, while a new N adsorption center for NO x was provided. Abundant adsorption centers and superior redox properties ensured smooth CB/NO x synergistic degradation. The removal of CB mainly follows the L-H mechanism, while NO x elimination follows both E-R and L-H mechanisms. As a result, N doping provides a new approach to develop more advanced anti-SO 2 poisoning CB/NO x synergistic catalytic removal systems for extensive applications.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POSTHARVEST BIOLOGY AND TECHNOLOGY
·
2023
·
IF 7
Zhanpeng Liu,Miao Shao,Shahid Ahmed Junejo,Bin Zhang,Hongxin Jiang,Xiong Fu,Qiang Huang
A carrier of storing and releasing ethylene was prepared using V-type starch (VS) or cross-linked VS as core and sodium alginate (SA) as shell. Fourier Transform InfraRed spectra revealed that the VS was successfully cross-linked and its stability in water was enhanced. Scanning electron microscopy (SEM) images confirmed that ethylene was encapsulated into VS or cross-linked VS and then coated with SA-Ca 2+ matrix to form close-knit beads. The SA beads contained 0.48–0.67 mol ethylene per Kg starch and maintained a very slow ethylene-releasing rate at 4 °C for 7 d in a dry storage condition. SA shell absorbed the water from the air and swelled after being exposed to an environment with certain humidity, triggering a stable release of ethylene within 7 h. In the ripening process, banana treated with 30 mg ethylene carriers in a 2.5 L container had a delayed maturation compared to the pure ethylene treatment along, and finally, ripening effect of carriers was equal to 10 nmol L −1 ethylene gas. This carrier can accomplish stability gas storage in dry condition, precisely controlled and targeted applications of ethylene under humidity ambience for agricultural applications.
研究领域:
食品科学
·
农业工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Nuanqin Zhang,Chengjie Xue,Kuang Wang,Zhanqiang Fang
In this study, a novel Cu-V bimetallic catalyst (CuVOx) with abundant surface defects was successfully synthesized by hydrothermal method. Degradation experiment of emerging pollutant fluconazole confirmed that CuVOx exhibited higher catalytic activity, wider pH applicability and more satisfactory reusability than monometallic copper compounds. Electron paramagnetic resonance and radical quenching tests indicated that surface hydroxyl groups play a crucial role in the degradation of contaminants. By the introduction of vanadium into copper-based materials, several surface properties that are closely related to the reactivity of the copper catalysts such as adsorption capacity, surface defects, and active sites concentration were improved. It was also found that the electron-rich center around Cu/V active sites and surface oxygen vacancies are responsible for the rapid dissociation of H 2 O 2 and the efficient catalytic oxidation of fluconazole in CuVOx Fenton system. We also applied CuVOx Fenton to the degradation of various refractory organic pollutants, further confirming its excellent removal and detoxification efficiency for organic pollutants in the aquatic environment.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Qing Gao,Zerui Ou,Xiangze Jia,Shahid Ahmed Junejo,Bin Zhang,Qiang Huang
Despite the good biological and antibacterial activities, the p-anisaldehyde is easy to evaporate or degrade during processing and storage. Herein, a new V -type starch-cyclodextrin composite carrier was constructed to efficiently encapsulate p-anisaldehyde in addressing the inherent disadvantages. The introduction of β-cyclodextrin (β-CD) enhanced the short- and long-range ordered structures of the composite carrier. The V -type starch-cyclodextrin composite ( V C30) exhibited the highest loading capacity of 142.01 mg/g for p-anisaldehyde, which was significantly higher than that of V -type starch (VS, 97.83 mg/g) and commercial β-CD (128.48 mg/g). The loading capacity of the V-type starch-cyclodextrin composite was positively correlated with its crystallinity and short-range order. The release rate of p-anisaldehyde was in the order of VC30 < β-CD < VS. Under non-cold chain daily storage (25 °C and 57 % relative humidity) for 2 weeks, the p-anisaldehyde of thymol released from complexes was 36 % (VC30), 49 % (β-CD), and 65 % (VS), respectively. Due to the high loading capacity and good sustained release properties, the noncontact preservation of high-value fruit by V C30 controlling p-anisaldehyde release successfully extended the shelf life of cherries from six to twelve days.
研究领域:
食品科学
·
材料科学
·
植物保护
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Lu Wen,Chaojie Li,Houqun Xiao,Huazhou Hu,Chaobin Lai,Luocai Yi,Qingjun Chen
The ZrCo alloy stands out as one of the most promising candidates for hydrogen isotope storage materials in nuclear fusion, owing to its extremely low equilibrium hydrogen pressure (10 −3 Pa, 20 ℃). However, ZrCo experiences severe disproportionation reactions during dehydrogenation/hydrogenation processes, which lead to significant performance degradation. To address this, we have introduced V and Ti into the ZrCo alloy, resulting in the Zr 0.8 V x Ti 0.2-x Co (x = 0–0.15) series. Our research indicates that the addition of V and Ti reduces the lattice parameters, thereby increasing the platform pressure for hydrogen desorption and decreasing the enthalpy and entropy of the desorption reaction. This modification allows for a lower desorption temperature and enhances the alloy's resistance to hydrogen-induced degradation. Remarkably, the hydrogen storage capacity of the Zr 0.8 V x Ti 0.2-x Co(x = 0–0.15) alloys remains stable after 19 h of desorption. Furthermore, the Zr 0.8 V 0.05 Ti 0.15 Co alloy demonstrates exceptional cycling stability, retaining over 99 % of its hydrogen storage capacity after 50 cycles. First-principles calculations have clarified the adsorption energies of hydrogen at different binding sites, revealing the following order of stability: E b(Ti-V) < E b(Zr-Ti) < E b(V-Zr) < E b(Zr-Zr) . The hydrogen absorption and desorption kinetics of the Zr 0.8 V x Ti 0.2-x Co alloys follow the trend: Zr 0.8 V 0.15 Ti 0.05 Co > Zr 0.8 V 0.1 Ti 0.1 Co > Zr 0.8 V 0.05 Ti 0.15 Co > ZrCo, indicating optimized performance with the introduction of V and Ti. This study not only provides a viable solution to the disproportionation issue in ZrCo alloys but also offers valuable insights into the design of high-performance hydrogen isotope storage materials for nuclear fusion applications.
研究领域:
材料科学
·
核聚变工程
·
金属氢化物
·
储氢材料
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物理化学
·
计算材料学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Ye Li,Bai-Hang Zhao,Chun Wang,Bao-Yu Zhang,Jia-Hang Liu
Supported catalysts have gradually become a research hotspot in the field of removing antibiotics from wastewater. In this study, CuFe 2 O 4 @2D-V composite catalyst was prepared by basic hydrothermal synthesis. Two-dimensional expanded vermiculite (2D-V) was prepared by high temperature and ultrasonic stripping to provide a loading platform for CuFe 2 O 4 metal ions. The characterization of CuFe 2 O 4 @2D-V was analysis by SEM, XRD and EDS. Then, levofloxacin (LVX) was chosen as representative to investigate the catalytic performance of CuFe 2 O 4 @2D-V by persulfate (PMS) activation. The optimal preparation conditions of CuFe 2 O 4 @2D-V and operating parameters of activating PMS to remove LVX were also studied. The result showed that under the condition of CuFe 2 O 4 loading 50 %, initial pH 9.2, LVX concentration 10 mg/L, catalyst concentration 0.5 g/L and PMS concentration of 0.3 mM, the removal efficiency and reaction rate of LVX could reach 89 % and 0.071 min −1 , respectively. Meanwhile, the catalyst had a good stability and high reusability. Based on the analysis of intermediate products by LC-MS, three possible degradation pathways were proposed. Quenching experiments found that non-radical O 2 1 dominated LVX degradation process. Also, the redox reaction between Cu (I)/Cu (II) and Fe (II)/Fe (III) played an important role in LVX removal process. This work might fill the gap in the application of vermiculite as a two-dimensional carrier, and provide further understanding for antibiotic wastewater treatment by metal based two-dimensional composite materials.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Environmental Science-Nano
·
2018
·Vol. 5
·期 11
·2570-2578
·
IF 6.087
Xinwen Ou,Xueming Liu,Weizhen Liu,Wencong Rong,Jingyuan Li,Zhang Lin
The surface defects of adsorbents are generally considered to be the active sites for adsorbates, and the adsorption behaviors of a variety of pollutants in wastewater are strongly influenced by the surface defects of the adsorbents. With simple chemical and structural properties, nano-Mg(OH)2 exhibits a high adsorption affinity and selectivity to heavy metals from wastewater. The insight into the surface complex structures of heavy metals on the Mg(OH)2 surface is fundamental for both the mechanism and application of defective adsorbents in wastewater treatment. In this study, the impact of surface defects of Mg(OH)2 nanoplates on the structure, energy, and adsorption amounts of toxic heavy metal oxyanions (HAsO42− and CrO42−) was investigated by combining the first-principles calculations and batch experiments. The first-principles calculations illustrated that the heavy metal oxyanions can be steadily incorporated into the surface defects to form inner-sphere complexes. The incorporated heavy metal oxyanions have strong charge–charge and chemical bonding interactions with the surface defect sites, which are much stronger than the hydrogen bonding interactions with the surface OH sites. Moreover, the adsorption affinity of surface defects towards heavy metal oxyanions is stronger than that towards other oxyanions (e.g. SO42− and NO3−), indicating the high adsorption selectivity of heavy metal oxyanions over other oxyanions. Batch adsorption experiments verified that the adsorption of defect-rich Mg(OH)2 adsorbents towards heavy metal ions, e.g., As(V) and Cr(VI), was favorable even under the condition of low concentration (mg L−1 level). These findings reveal the significance of surface defects of Mg(OH)2 for extracting As(V) and Cr(VI) from low-concentration solutions. The proposed strategy of surface defect-fabrication should provide a useful insight into designing effective adsorbents for the selective extraction of heavy metal oxyanions at low concentration.
研究领域:
环境科学
·
材料科学
·
理论化学
✓ 已验证
产品关联
DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2024
·Vol. 235
·期 1
·1-20
·
IF 3.8
Liu Bangwei,Zhou Yan,Zhang Yiwei,Chen Dandan,Liu Wenhui,Lu Ping,Su Xiaoyu,Xia Tian
A zero-valent iron-loaded corn straw char (ZVI-CSC) was synthesized in this study for the remediation of As(V) and Cd(II) contamination. The impact of ZVI-CSC on the adsorption performance of As(V) and Cd(II) in solution, as well as their migration properties in soil, was investigated through adsorption kinetics and soil column leaching experiments, respectively. The results showed that the adsorption capacity of As(V) by ZVI-CSC was significantly improved to 14.42 g·kg −1 at pH = 3, compared with unmodified corn straw char (CSC). However, the adsorption capacity of Cd(II) was not improved. In the leaching experiments, the addition of ZVI-CSC to As(V)-contaminated soil resulted in a significant reduction of cumulative As(V) release rate from 32.26 to 3.11%, compared with corn straw char (CSC). Moreover, the role of ZVI in As(V)/Cd(II) remediation was analyzed. nZVI forms ≡Fe-OH and ≡Fe-OOH due to oxidation, which can form monodentate and bidentate complexes with As(V) via ligand exchange, thus promoting As immobilization. Furthermore, to further improve the adsorption performance of Cd(II), the electrostatic potential (ESP) of biochars with different surface functional groups (C = O, C–O–C, –OH, and –COOH) and their bond dissociation enthalpy (BDE) with As(V) and Cd(II) were calculated based on density functional theory (DFT). The results showed that –OH was the most effective for As(V) adsorption, and C–O–C was the most effective for Cd(II) adsorption. C = O and –COOH can be used to the simultaneous adsorption of As(V) and Cd(II). Therefore, the surface functional groups of ZVI-CSC can be selectively modified to improve its adsorption performance of As(V) and Cd(II). Graphical
研究领域:
环境科学
·
材料科学
·
化学工程
·
土壤修复
✓ 已验证
DOI
高影响因子
ACS Omega
·
2021
·
IF 3.512
Ruiming Xiao,Wanci Liao,Guangjuan Luo,Zhenning Qin,Shuangyan Han,Ying Lin
Mogroside V (MV), a sweetener, is one of the major components inSiraitia grosvenorii. In our research, after in vitro incubation with MV for 24 h, the human gut microbiota diversity changed, with an enrichment of the genera Bacteroides, Lactobacillus, Prevotella, Megasphaera, and Olsenella and the inhibition of Clostridium XlVa, Dorea, and Desulfovibrio. Moreover, the synthesis of short-chain fatty acids, such as acetate, propionate, and butyrate, was increased by gut microbiota. According to ultraperformance liquid chromatography–mass spectrometry (UPLC-MS) analysis, MV was decomposed into secondary mogrosides, such as mogroside II/I and mogrol, by gut microbiota. Enhanced antioxidant abilities of the metabolites were found in the broth. The results suggested that MV, as a potential prebiotic, could benefit human health through its interaction with gut microbiota.
研究领域:
营养学
·
微生物学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Zhipan Wen,Jun Ke,Jinlei Xu,Sheng Guo,Yalei Zhang,Rong Chen
Toxic heavy metals As(V) and Cr(VI) removal from water environment has becoming more and more urgent due to their adverse health effect. In this study, the flowerlike Ce/Fe bimetallic oxides (CFBO), which combined the superiority of three-dimensionally (3D) hierarchical architectures and bimetallic synergistic effect, were innovatively designed and synthesized via one-step facile template-free hydrothermal method. Compared with pure iron oxides (PIO), the obtained CFBO exhibited excellent performance for As(V) and Cr(VI) removal, and the maximum adsorption capacities toward As(V) and Cr(VI) increased from 49.09 mg/g to 164.94 mg/g and 38.07 mg/g to 127.42 mg/g, respectively. Both As(V) and Cr(VI) removal efficiency decreased with an increasing solution pH due to the pH zpc of CFBO, but exhibited slightly change with coexisting anions except for SiO 3 2− and PO 4 3− ions. Combined results of FT-IR and XPS, it was concluded that the abundant hydroxyl groups existed on the surface of CFBO played a key role in the high uptake of As(V) and Cr(VI), and subsequently formed inner-sphere surface complexes. Attractively, the remarkable removal efficiency of As(V)/Cr(VI) in column experiments revealed that the CFBO had great potential for practical application.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Weiwei Li,Wenlan Ji,Murat Yılmaz,Tian C. Zhang,Shaojun Yuan
Arsenic is a toxic carcinogen, and arsenic pollution in groundwater is one of the most serious environmental problems in the world. Thus, it is an urgent problem to efficient removal of arsenic from groundwater. In this work, a novel MWCNTs/MIL-53(Fe) nanocomposite was successfully synthesized to improve the water stability of MIL-53(Fe) by incorporation of carboxylated multi-walled carbon nanotubes (MWCNTs) using a one-pot hydrothermal method, and was then used to efficiently adsorb As(V) ions from groundwater. Adsorption experimental results demonstrated an ultrafast adsorption rate of As(V) on the MWCNTs/MIL-53(Fe) nanocomposites in solution pH values of 3 to 10, and the adsorption equilibrium could be reached in circa 20 min with an adsorption capacity of 27.24 mg·g −1 in a low As(V) concentration of 10 mg·L −1 . The adsorption kinetics of As(V) on the MWCNTs/MIL-53(Fe) was found in line with the pseudo-second-order (PSO) kinetic model, and was simultaneously controlled by both internal diffusion and liquid film diffusion. The adsorption isotherm data conformed to the Redlich-Peterson isotherm model, indicating both physical and chemical adsorption occurred at heterogeneous interfaces. Moreover, the postulated adsorption mechanism of As(V) on MWCNTs/MIL-53(Fe) nanocomposites was ascribed to hydrogen-bond interaction, electrostatic attraction and chemical complexation. Therefore, the as-prepared MWCNTs/MIL-53(Fe) nanocomposites not only exhibit superior water stability and outstanding adsorption performance in removing arsenic-contaminated groundwater, but also offer a novel insight for rational preparation of water-stable MOF-based composites.
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
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2022
·Vol. 103
·期 3
·730-741
·
IF 2.606
Chang Tanran,Lv Hongning,Tan Minghui,Zheng Shumin,Gao Wei-Bo,Wang Bao,Zhao Qingsheng,Zhao Bing
Dye and heavy metal pollution has caused serious damage to water. It became a study hotspot to treatment at domestic and abroad. The abandoned industrial hemp residue after extraction of cannabidiol (CBD) commonly causes resource waste and environmental pollution. Herein, the industrial hemp residue is reused to prepare a recyclable composite with chitosan and Fe@ZIF67 magnetic metal material for the pollutant treatment. The properties of the synthesized composite are characterized by SEM, TG, BET, FT-IR, XRD, VSM, and Zeta potential analysis. Congo red (CR) and As (V) are adopted to evaluate the adsorption properties of composite. The composite shows the best adsorption effect for CR when the addition of industrial hemp residue is 20%, and the adsorption capacity is 166 mg/g. Whereas the best adsorption effect for As (V) occurs at the addition of industrial hemp residue is 2%, and the adsorption capacity is 22 mg/g. The results reveal that the developed composite has good adsorption effect on CR and As (V), suggesting the recycling of industrial hemp residue has potential for water production and industrial wastewater treatment. It may provide useful insights into the development of recovery and utilization of industrial hemp residue.
Graphical abstract
研究领域:
环境科学
·
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）