WOOD SCIENCE AND TECHNOLOGY
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2022
·Vol. 56
·期 6
·1657-1673
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IF 2.898
Zhu Gang,Li Hui,Deng Shuduan,Zhang Chaoling,Kang Kunyong,Zhang Xupeng,Li Kaiqian
Metal–organic frameworks (MOFs)/wood are attractive hybrid materials that offer a range of multifunctional properties by integrating MOFs into wood substrates. Although a good foundation has been laid in studies, it is clear that studies are limited to the conjugation of wood with monometallic MOFs. Research on the utility of novel hybrid materials designed incorporating bimetallic MOFs into wood has not yet been encountered. Herein, a novel bimetallic cobalt/zinc-based zeolite imidazolate frameworks (Co/Zn-ZIF)@wood hybrid material was successfully fabricated through in situ growth of Co-ZIF-67 and Zn-ZIF-8 within balsa wood channel arrays. SEM images indicated that Co/Zn-ZIF exhibited smaller particle sizes compared with Co and Zn monometallic MOFs. The resulting composite displays high removal efficiency up to 97.2% for methylene blue and the adsorption capacity can reach 223.6 mg·g −1 at 298 K. Moreover, the incorporation of Co/Zn-ZIF has better effect on thermal stability at the early stage and char layer formatting of wood substrate than monometallic MOFs. Compared with the monometallic MOF additives, the peak of heat release rate of the Co/Zn-ZIF@wood hybrid materials exhibited a drastic decline by 67.5% from 94.5 to 30.7 W·g −1 and the total heat release from 7.7 to 3.5 kJ·g −1 . In addition, the introduction of Co/Zn-ZIF increases the limiting oxygen index (LOI) values of the prepared composites, and the treated wood had a strong self-extinguishing ability, which manifested that Co/Zn-ZIF@wood had excellent flame retardancy. This work offers a new avenue for designing and constructing functionalized MOFs@wood composites that may boost their environmental- and green building-related applications.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Guifang Wang,Guangchuan Liang,Huizhen Xiao,Jun Qiu,Haiyan Liu,Shaojian Ma,Sridhar Komarneni
The conventional environmental remediation materials, which are applied for the long-term treatment of mine tailings are easy to fail when affected by acid rain. Therefore, dynamic column simulation experiments were conducted to compare the immobilization persistence of As, Mn, Pb and Zn by the addition of triethylenetetramine modified montmorillonite (TTA-Mt) and calcium-based montmorillonite (Ca-Mt) in sulfide tailings during a simulated 5-year study of acid rain leaching. The structural and morphological characteristics of TTA-Mt were analyzed with FTIR, XRD, SEM, TEM and EDS. Results showed that the additions of TTA-Mt could persistently immobilize the heavy metal ions while Ca-Mt additions had little effect. After long-term simulated leaching for 5 years, TTA-Mt still had superior environmental stability for Zn and As with the immobilization rates of 96% and 86%, and the leaching amounts of Mn and Pb were less than 4.23 and 0.66 mg/kg, respectively. Morphology and chemical fraction analyses confirmed that the immobilization was mainly due to the formation of relatively stable phases by complexation and precipitation. Results presented here demonstrated the significant potential of TTA-Mt for long-term immobilization of heavy metals in tailings against acid rain and thus could provide guidance for remediation of tailings.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 40
·61534-61546
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IF 5.19
Tan Jiangtao,Chen Yongjian,Mo Zhaowen,Tan Chunju,Wen Runhao,Chen Zhengtong,Tian Hua
Metal nanoparticles and microplastics are becoming important pollutants in agricultural fields, but there are few studies on the interaction of zinc oxide nanoparticles (ZnONPs) and polyethylene (PE) microplastics with rice seedlings. The two rice cultivars Xiangyaxiangzhan and Yuxiangyouzhan were grown at three ZnONP levels (0 mg L −1 , 50 mg L −1 , and 500 mg L −1 ) and three PE levels (0 mg L −1 , 250 mg L −1 , and 500 mg L −1 ), and the growth, physiological attributes, and Zn uptake of rice seedlings were measured. Result showed that the ZnONPs and PE treatment effects on the investigated parameters differed between the cultivars, whilst Yuxiangyouzhan produced 6.98% higher in mean total dry biomass than Xiangyaxiangzhan. The mean total dry biomass in Xiangyaxiagnzhan and Yuxiangyouzhan changed by 10.22–30.85% and − 11.74–25.58% under ZnONPs, respectively. The PE treatments reduced growth parameters in Xiangyaxiangzhan, whilst the 250 mg L −1 PE treatment reduced the growth parameter of Yuxiangyouzhan. Besides, the ZnONP treatment had a stronger effect on rice seedling growth than the PE treatment. Furthermore, the ZnONPs modulated the physiological parameter in plant tissue of the two rice varieties. ZnONP treatment lead to the accumulation of Zn in plant tissue and the shoot Zn content was strongly related to shoot cellulose content. Overall, ZnONPs and PE treatments modulated the growth, physiological and biochemical attributes, and Zn uptake of rice seedlings, and the cultivars and dose effects could not be ignored.
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PubMed
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Lijun Wu,Weifeng Yue,Nengzhan Zheng,Mengshen Guo,Yanguo Teng
Exploring the relationships between heavy metal release and salinity can help address the problems of combination of toxic heavy metals and salinization in contaminated soils. Therefore, in this study, the release characteristics of heavy metals (Cd, Cu and Zn) under different salt types and mass concentrations were investigated through batch desorption experiments. Spearman's correlation analysis was performed to assess the effects of typical physicochemical properties on metal release under salt stress. The results indicated that the types and concentration gradients of salt had notably different impacts on the release of different metals; specifically, there were significant impacts for Cd but slight impacts for Cu and Zn. MgCl 2 and CaCl 2 had more obvious promoting effects on Cd release, followed by a salt mixture and NaCl, and this pattern was similar for Zn release. Most salts could slightly restrain the release of Cu, except for MgCl 2 and Na 2 SO 4 , which had slight promoting effects. Moreover, low levels of CaCl 2 could effectively restrain the release of Cu. The results showed that the release capacities of metals followed the order of Cd > Cu > Zn, possibly attributed to the competitive adsorption among cations. Ferromanganese oxides in the soil favored the release of Cd and Zn under salt treatments, and redox potential was an important factor affecting Cu release. The results also suggested that the background values of metals could affect metal release, but the effects were varied under different salt treatments for Zn. The reason for this may be that the addition of different salts changed the effects of certain soil properties on the metal release. Overall, this study can serve as an important reference for controlling heavy metal pollution in soils in salinization and coastal areas.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Lihao Yu,Qijia Ding,Ying Liu,Dongtian Sun,Jinrui Ding,Guoxing Zhu,Hongye Bai,Weiqiang Fan
The exposed active sites of ZIF-8 is considered as the key to boost the kinetics of photoelectrochemical (PEC) water splitting. However, the terrible stability under irradiation and aqueous conditions significantly limit the practical application for fabricating the efficient photoeletrode. Herein, a novel strategy is employed for solving the stability of Zn-MOF (ZIF-8) by partially replacing Zn 2+ ions by Ni 2+ ions. The TiO 2 photoelectrode is selected as a testing model to study the superiority of TiO 2 –ZnNi MOF for PEC water splitting. TiO 2 –ZnNi MOF exhibits a strong photocurrent density of 1.00 mA/cm 2 (1.23 V vs. RHE), which is 2.7 and 1.7 times that of TiO 2 and TiO 2 –Zn MOF, respectively. More importantly, the photocurrent density of TiO 2 –ZnNi MOF maintains almost 100% for 2 h, while TiO 2 –Zn MOF significantly decays to 81.6% for just 8.3 min, indicating the successful achievement for promoting the stability of Zn-MOF. Therefore, this work proposes a reasonable route to simultaneously enhance the PEC efficiency and stability of TiO 2 –Zn MOF for the first time, which provides a new guidance for the design of highly stable photoelectrode.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Qianqun Xu,Xiaomin Peng,Zhaogen Zhu,Kaifen Luo,Yiyi Liu,Dingsheng Yuan
Reversible oxygen electrodes with high efficiencies for the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are of great significance for a variety of energy conversion devices, such as fuel cells and metal-air batteries . Herein, Co 2 P nanoparticles supported on cobalt-embedded N-doped carbon materials (Co 2 P/Co–N–C) have been prepared by pyrolysis of cobalt zeolitic imidazolate framework and phosphating post treatment. The optimal Co 2 P/Co–N–C composite shows excellent bifunctional electrocatalytic activities for both OER (the potential of 1.65 V at 10 mA cm −2 ) and ORR (half-wave potential of 0.82 V). As a practical demonstration, Co 2 P/Co–N–C catalyst is used as an air electrode in liquid Zn-air battery, which displays a large open-circuit voltage of 1.50 V, a high peak-power density of 158 mW cm −2 and excellent reversibility of over 205 h at 5 mA cm −2 . Moreover, the flexible Zn-air battery with Co 2 P/Co–N–C exhibits a high open-circuit voltage of 1.46 V and the good flexibility with different angles. This work provides inspiration to explore new strategies for electrochemical energy conversion and storage .
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MACROMOLECULAR MATERIALS AND ENGINEERING
·
2022
·Vol. 308
·期 2
·2200461
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IF 4.402
Guorong Wang,Zhiyuan Mei,Yu Li,Guotao Chen,Jie Xin,Zhaoyi Sun,Qingxin Wang,Xu Luo
A metal–organic framework (MOF) formed between Zn and p -hydroxybenzoic acid (PHBA) is synthesized using a solvothermal method. These Zn-PHBA nanorods, which are inexpensive and suitable for mass production, are added as a flame-retardant into vinyl resin (430 LV, a material used in marine composites). Data from cone calorimetric test demonstrates that adding the Zn-PHBA nanorods to 430 LV significantly improves flame retardation and smoke suppression. At a high Zn-PHBA content of 10.0 wt%, the limiting oxygen index of 430 LV increases from 19.5% to 28.5%, and the material reaches the V-0 rating in vertical burning tests (UL-94). Moreover, the tensile and impact strengths of 430 LV containing 10 wt% Zn-PHBA as flame-retardant do not deteriorate and are even slightly improved. This work demonstrates that this MOF synthesized by a simple and efficient method may be used to produce nanocomposites with excellent flame retardation and mechanical properties, while keeping the material cost sufficiently low for marine applications.
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ENVIRONMENT INTERNATIONAL
·
2022
·
IF 13.352
Yun Liu,Xue Wang,Bo Si,Tong Wang,Yun Wu,Ying Liu,Yemian Zhou,Haiyang Tong,Xinwei Zheng,An Xu
Environmental cadmium (Cd) pollution has been verified to associated with various hepatic diseases, as Cd has been classified as one of the TOP 20 Hazardous Substances and liver is the main target of Cd poisoning. However, to design efficient hepatic antidotes with excellent detoxification capacity and reveal their underlying mechanism(s) are still challenges in Cd detoxification. Herein, ZnO/GO nanocomposites with favorable biocompatibility was uncovered their advanced function against Cd-elicited liver damage at the in situ level in vivo by 9.4 T magnetic resonance imaging (MRI). To explore the cellular detoxification mechanism, ZnO/GO nanocomposites was found to effectively inhibit the cyto- and geno-toxicity of Cd with the maximum antagonistic efficiency to be approximately 90%. Mechanistically, ZnO/GO nanocomposites competitively inhibited the cellular Cd uptake through releasing Zn ions, and significantly promoted Cd excretion via targeting the efflux pump of multidrug resistance associated protein1 (MRP1), which was confirmed by mass spectra and immunohistochemical analysis in kidney, a main excretion organ of Cd. Our data provided a novel approach against Cd-elicited hepatotoxic responses by constructed ZnO/GO nanocomposites both in vitro and in vivo , which may have promising application in prevention and detoxification for Cd poisoning.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Weixia Bi,Ge Wang,Xiang Hu
Antibiotic-resistant genes (ARGs) and antibiotics were detected in various environmental media. Metal-organic framework materials (MOFs) have great advantages in removing many pollutants in water. However, their microporous structure and poor hydrothermally stability make them difficult to realize efficient adsorption performance of macromolecular pollutants. Therefore, this study is devoted to preparing MOF-derived mesoporous carbon materials with excellent pore structure and stability so as to improve the adsorption performance of macromolecular antibiotics in water. In this study, the surface morphological structure of the MOF material was regulated from the preparation process. Firstly, the template agent formed micelles in the MOF framework, so that self-assembly and crystal growth were carried out under the guidance of cooperative templates. Secondly, the morphological structure of the material surface was modified by high-temperature calcination and surface etching. A series of graphitic carbon material MC-X with tunable mesoporous structure were prepared using Zn-MOF materials as precursors and N-Cetyldimethylamine as template. The pore size and mesoporous ratio of the MC-0.3 material had undergone large changes, the pore size varied from 1.73 nm to 3.94 nm, and the mesoporous ratio transformed from 12.6% to 97.71%. Unexpectedly, the material converted from hydrophilic to hydrophobic, and possessed an ultra-high ceftazidime (CAZ) adsorption capacity of 371.18 mg·g −1 . The adsorption mechanisms of CAZ on MC-0.3 were mainly molecular size matching selection, hydrophobic effect and hydrogen bonding . After 5 adsorption-desorption cycles, MC-0.3 could maintain about 90% of the initial adsorption capacity.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
·
IF 24.319
Rong Shang,Qizhao Zhang,Peng Lin,Bang Gu,Qinghu Tang,Qiue Cao,Wenhao Fang
Direct oxidative coupling of alcohols and amines is an environmental-benign and atomic-economy approach for imine synthesis. We disclosed that UiO-66 framework successfully confined Ru to single-atom scale with assistance of oxophilic Zn 2+ promoter. This RuZn@UiO-66 catalyst showed a highest TOF of 78 h -1 among all Ru catalysts in literature and attained > 99% yield to benzylideneaniline in the model reaction in an O 2 atmosphere at a low temperature without alkaline additives. In addition, this catalyst demonstrated satisfying gram-scale imine synthesis, wide substrate scope and stable reusability. Kinetic investigations and in situ characterizations allowed getting insights to active sites, amphoteric carrier and reaction mechanism. Dynamic interactions between Ru and Zn based on their ratios induced electron-deficient Ru 0 active sites promoted by oxophilic Zn 2+ species. Hence, primary alcohols can be efficiently converted to the corresponding aldehydes using molecular O 2 , i.e. , the rate-determining step. Besides, Zr 4+ -O 2- pairs on UiO-66 provided adequate acidic-basic sites for the tandem catalysis.
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Journal of Materials Chemistry A
·
2021
·Vol. 10
·期 6
·3169-3177
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IF 12.732
Zhi-Da Wang,Song Liang,Cheng-Kun Bai,Zhong-Feng Guo,Guo-Long Lu,Hang Sun,Zhen-Ning Liu,Hong-Ying Zang
N-coordinated transition-metal materials are promising electrocatalysts for various sustainable and efficient electrochemical energy conversion and storage devices. Here we report a simple synthetic route for simultaneously crafting Fe and Zn bimetallic sites on 1D N-doped hollow mesoporous multi-walled carbon nanotubes (denoted as Fe–Zn/N/C/MWCNTs-800). Attributed to the synergistic effect between the Fe–Nx center and Zn–Nx center on the coupled conductive heterostructured carbon matrix with moderate pyridinic-N and graphitic-N species, the Fe–Zn/N/C/MWCNTs-800 catalyst exhibited remarkable ORR activity, favorable long-term stability, and remarkable methanol tolerance in an alkaline electrolyte, comparable to commercial 20 wt% Pt/C. Moreover, the assembled flow liquid rechargeable Zn–air batteries with Fe–Zn/N/C/MWCNTs-800 as a cathode material also exhibited excellent open-circuit voltage, power density, and cycling stability over 180 h. This report provides a general strategy for fabricating Zn-based N-coordinated transition-metal electrocatalysts for catalytic applications.
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APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Xu Cai,Tongtong Jiang,Mingzai Wu
The sluggish oxygen evolution reaction (OER) and poor stability of oxygen electrocatalysts are main obstacles to the scale-up commercial application of rechargeable Zn-air battery. Herein, a three-dimensional (3D) multi-level architecture design is achieved by the confined growth of two-dimensional (2D) layer double hydroxides of nickel and iron (NiFe LDH) flakes on copper nanowires arrays (Cu NWs), which is epitaxially assembled on the surface of Cu foam (CF). The established Cu@Cu NW@LDH possesses stronger bonding strength between NiFe LDH and Cu NWs as well as Cu NWs and CF endowed by electroplating method. The introduction of Cu NWs not only provides abundant nucleation sites for the deposition of NiFe LDH flakes but also improves the electron conductivity of composite. The obtained Cu@Cu NW@LDH shows excellent OER catalytic activity with a potential of 1.44 V at a current density of 10 mA cm −2 and strong alkaline resistance properties in comparison with NiFe LDH on CF (Cu@LDH). As expected, the rechargeable zinc-air battery (ZAB) with Cu@Cu NW@LDH as air electrode delivers superior cycling stability (250 h at a current density of 10 mA cm −2 ). This work paves a new way to the design of 3D multi-level architecture catalysts for ZAB.
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