Journal of Water Process Engineering
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2022
·
IF 7.34
Qian Zhou,Bingxiao Feng,Lining Hao,Chao Pan,Hongbing Song,Hengjun Gai,Quanhong Zhu,Meng Xiao,Tingting Huang
The removal of oil from coal pyrolysis wastewater persists to be a challenging problem. Thus, this study proposes a new scheme that integrates the adsorption of oil using fibers and subsequent centrifugation or elution to achieve efficient oil–water separation. Based on their stable chemical property, PP and were selected as the substrates for drawing the fibers. In addition, PVDF and PTFE were explored to modify the wettability of PP and PE. The performances of as-prepared fibers were tested for removing oil from wastewater in both batch and continuous modes. Among all the fibers, the PVDF-modified PP fibers exhibited the best performance. For PP-based fibers with 5 wt% PVDF, the saturated oil-removal efficiency reached 92.24 % in case of the simulated wastewater and 81.10 % for the actual wastewater. Given that the oil content in coal pyrolysis wastewater was ~2000 ppm, the residual oil content in the outlet water would be ~380 ppm, which satisfies the requirement of the subsequent treatment process. Furthermore, the PVDF-modified PP fibers exhibited excellent reusability and stability to defy various environmental corrosions. The separation of oil and water based on the adsorption by fibers offers promising prospect to remove oil from coal pyrolysis wastewater. In addition, we derived a formula to calculate the oil contact angle under water based on Young's equation using several measurable parameters. As the calculation results were consistent with real scenarios, this derived formula can provide quantitative guidance for material modification in coal wastewater treatment .
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2022
·Vol. 24
·期 1
·504
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IF 6.208
Zhilan Du,Dashuang Wang,Xinfang Zhang,Zhiyu Yi,Jihai Tang,Pingan Yang,Rui Cai,Shuang Yi,Jinsong Rao,Yuxin Zhang
In this work, a novel core-shell structure material, NiFe layered double hydroxide (NiFe LDH) loaded on SiO2microspheres (SiO2@NiFe LDH), was synthesized by a one-step hydrothermal method, and the spontaneous electrostatic self-assembly process. The morphology, structure, and microwave absorption properties of SiO2@NiFe LDH nanocomposites with different NiFe element ratios were systematically investigated. The results show that the sample of SiO2@NiFe LDH-3 nanocomposite has excellent microwave absorption properties. It exhibits broadband effective absorption bandwidth (RL < −10 dB) of 8.24 GHz (from 9.76 GHz to 18.0 GHz) and the reflection loss is −53.78 dB at the matched thickness of 6.95 mm. It is expected that this SiO2@NiFe-LDH core-shell structural material can be used as a promising non-precious, metal-based material microwave absorber to eliminate electromagnetic wave contamination.Keywords:SiO2microspheres;LDH;microwave absorption;core-shell structure
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2022
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IF 10.319
Qiqin Liang,Lei Wang,Xiaosi Qi,Qiong Peng,Xiu Gong,Yanli Chen,Ren Xie,Wei Zhong
Impedance matching characteristics and loss capabilities including magnetic loss, polarization loss and conduction loss are critical factors to improve microwave absorption performances (MAPs). To elevate these aspects, herein, yolk-shell structured CoNi@Air@C/SiO 2 @Polypyrrole (PPy) magnetic multicomponent nanocubes (MCNCs) were designed and successfully fabricated in high efficiency through a continuous co-precipitation route, classical Stöber method, thermal treatment and polymerization reaction. The obtained results indicated that the formation of SiO 2 effectively stabilized the cubic geometrical morphology and yolk-shell structure during the high-temperature pyrolysis process. The introduction of PPy greatly boosted their polarization loss and conductive loss capabilities. Therefore, the as-prepared yolk-shell structured CoNi@Air@C/SiO 2 @PPy MCNCs presented superior MAPs compared to CoNi@Air@C/SiO 2 MCNCs. Furthermore, by regulating the content of PPy, the obtained CoNi@Air@C/SiO 2 @PPy MCNCs displayed tunable and excellent comprehensive MAPs in terms of strong absorption capabilities, broad frequency bandwidths and thin matching thicknesses, which could be ascribed to the unique structure and excellent magnetic-dielectric synergistic effect. Therefore, our findings provided an alternative pathway to effectively utilize the magnetic-dielectric synergy and loss capabilities for the developing yolk-shell structured magnetic MCNCs as the strong wideband microwave absorbers.
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Bioactive Materials
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2022
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IF 16.874
Chang Liu,Quan Zou,Huixin Tang,Jia Liu,Shiqi Zhang,Caihong Fan,Junwei Zhang,Ruiqing Liu,Yashan Liu,Ruiyan Liu,Yan Zhao,Qiang Wu,Zhi Qi,Yanna Shen
Myocardial injury as one of the severe complications leads to the increasing morbidity and mortality in patients with sepsis. Recent studies reported that reactive oxygen species (ROS)-mediated ferroptosis plays a critical role in the development of heart diseases. Therefore, we hypothesized that anti-ferroptosis agent might be a novel potential therapeutic strategy for sepsis-induced cardiac injury. Herein, we demonstrated that a small biocompatible and MRI-visible melanin nanoparticles (MMPP) improves myocardial function by inhibiting ROS-related ferroptosis signaling pathway. In LPS-induced murine sepsis model, after a single dose intravenously injection of MMPP treatment, MMPP markedly alleviated the myocardial injury including cardiac function and heart structure disorder through suppressing iron-accumulation induced ferroptosis. In vitro , MMPP inhibited cardiomyocyte death by attenuating oxidative stress, inflammation and maintaining mitochondrial homeostasis. Collectively, our findings demonstrated that MMPP protected heart against sepsis-induced myocardial injury via inhibiting ferroptosis and inflammation, which might be a novel therapeutic approach in future.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Qingyi Zeng,Yumei Wang,Qingyan Zhang,Jiayu Hu,Yanjun Wen,Jin Wang,Rongzhong Wang,Shuaifei Zhao
Transition metal sulfides have been demonstrated to be effective for peroxymonosulfate (PMS) activation towards wastewater treatment. However, the activity of vanadium sulfide (VS 4 ) and the role of the chemical state of V have not been revealed. Here, three types of VS 4 with various morphologies and chemical states of V were synthesized by using methanol (M−VS 4 , nanosphere composed of nanosheets), ethanol (E-VS 4 , sea urchin like nanosphere) and ultrapure water (U-VS 4 , compact nanosphere) as hydrothermal solvent, respectively, and used as heterogeneous catalysts to activate PMS for the degradation of refractory organic pollutants. The effects of PMS concentration, temperature, pH, inorganic ions, and humic acid (HA) on the degradation efficiency of VS 4 /PMS system were investigated systematically. The results indicated that the highest specific surface area and lowest ratio of V 5+ enable E-VS 4 /PMS system possessed the highest performance in degrading tetracycline hydrochloride (TCH), in which 100% TCH was removed after operating 10 min (0.805 min −1 ) under a relatively low concentration of PMS (1 mM) and catalyst (100 mg/L). It also revealed that the system exhibited a typical radical process in TCH degradation, which could be attributed to the redox cycles between V 5+ , V 4+ and V 3+ in the presence of PMS to generate various radicals. This radical process enabled the E-VS 4 /PMS system with a high activity in wide reaction conditions and high mineralization ratios in degrading various refractory organic pollutants within 10 min. In addition, the E-VS 4 /PMS system exhibited favorable reusability and stability with very less V and S ions leaching, and showed excellent performance in real water purification.
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Yanyan Du,Yufeng Xu,Yulin Zhang,Beibei Yang,Hongbin Lu,Cunwang Ge,Duan Bin
As one of next-generation energy storage devices, aqueous zinc-ion batteries (ZIBs) have received increasing attention owing to the merits of low cost, high safety and eco-friendliness. However, challenges still exist in searching for high-performance cathode materials with microstructural engineering and morphology design. Herein, a dissolution-regrowth and conversion strategy are developed by using metal–organic framework template, which facilitate in situ formation of CoVO x oxide with porous one-dimensional channels and unique nanostructures. Owing to the unique structure, Zn 2+ ions which are inserted directly into the host CoVO x -2 nanoplate to allow the high diffusion and low interfacial resistance. Consequently, the CoVO x -2 nanoplate cathode delivers a high reversible capacity of 288 mAh/g at 0.05 A/g and long cycle life at low current density of 1 A/g (94 % of the highest capacity is maintained at 1 A/g after 1000 cycles). Moreover, the reversible storage mechanism is confirmed by a series of ex-situ physical characterization and electrochemical performance investigation. These findings provide a new insight into high-performance MOF-derived unique structure designs for rechargeable battery electrodes.
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DESALINATION
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2022
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IF 11.211
Lei Zhang,Dan He,Jia Li,Yanting Li,Yiming Xiao,Jun Xiang,Wei Du,Na Tang
In this work, PP-TSF superhydrophobic membrane was constructed by a triple layer on the PP membrane, containing titanium layer by atomic layer deposition , silica layer by sol-gel, and fluorine layer by chemical grafting. The titanium layer worked as a transition layer, increasing the binding stability between PP and the superhydrophobic layer, the silica layer provided more hydroxyl sites for superhydrophobic modification. Meanwhile, and the fluorine layer with low surface energy was the core of the superhydrophobic property. The microstructure, porosity, and pore diameter had no significant change after modification. The contact angle of the composite membrane was up to 158 o , and the rolling angle was less than 10 o . The hydrophobicity , self-cleaning properties, and surface roughness are significantly improved after modification. The salt retention of the high salt (15 wt%) was consistently higher than 99 % during the 21-h vacuum membrane distillation experiment.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Varney Edwin Johnson,Qi Liao,Bob Wisdom Jallawide,Richmond Anaman,Charles Amanze,Peicheng Huang,Wei Cao,Chunlian Ding,Yan Shi
Efficient removal of arsenic (As) and lead (Pb) from industrial wastewater has long been a critical environmental issue due to their serious risk to human health. Therefore, in this work, a modified banana peel biochar (MBPB) was prepared by mixing calcium nitrate , diammonium hydrogen phosphate , sulfuric acid, ferric nitrate with dehydrated banana peel biochar as adsorbent for As(V) and Pb(II) removal in wastewater, and their absorption mechanism was investigated. SEM-EDS, TEM, FTIR , XRD , XPS , BET, kinetic, and isothermal characteristics of MBPB and pristine banana peel biochar (PBPB) were conducted. The behavior of both metal ions on MBPB and PBPB was well explained by the pseudo-second-order kinetic with Langmuir and Freundlich models. We found that the two biochar’s behaviors were mixture processes of monolayer and multilayer adsorption , achieving maximum capacities as determined by the Langmuir model of 39.5 mg g −1 (MBPB-As), 33.2 mg g −1 (MBPB-Pb), 30.8 mg g −1 (PBPB-Pb), and 23.5 mg g −1 (PBPB-As), with maximum efficiencies of 98.7% (MBPB-As) and 90.3% (MBPB-Pb) under optimum conditions. Thermodynamic tests showed that As(V) and Pb(II) removal on MBPB was a spontaneous and endothermic physisorption process. MBPB showed great reusability in As(V) and Pb(II) removal, with removal rates as high as 71.4% and 66.5% after five cycles, respectively. Selective adsorption of As(V) and Pb(II) was also investigated on MBPB, and the removal rate was still high in the mixture of heavy metals. These findings provide a feasible method for the environmental-benign utilization of banana peel as a low-priced adsorbent in wastewater treatment .
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APPLIED CATALYSIS A-GENERAL
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2023
·
IF 5.5
Bingjie Ding,Yongjun Jiang,Beibei Xu,Sheng Dai,Honghui Gong,Xiuge Zhao,Yefeng Yao,Pengfei An,Zhenshan Hou
This work demonstrated a facile methodology to construct single Nb site catalysts with merely 0.63 wt% Nb by employing α-hydroxy carboxylic acid-functionalized cotton fiber as green and sustainable supporting material. The as-synthesized catalysts have been characterized thoroughly and exhibited a superior catalytic activity for selective oxidation of aniline into azoxybenzene with nearly 100% utilization efficiency of H 2 O 2 under mild and green conditions. Notably, it demonstrated the highest TOF (4806 h −1 ) among the currently reported heterogeneous catalysts. Moreover, the catalyst has steadily been operated under continuous-flow conditions, which afforded significant benefits compared to batch processes as reported in these transformations. The activity test and catalyst characterization indicated that the atomically dispersed Nb-peroxo coordination centers were actually catalytic sites. Especially, the α-hydroxy carboxylic acid groups on cotton fiber played an important role in coordinating/stabilizing single Nb site. Moreover, 1 H MAS NMR spectra verified that there exists an acid-base interaction between arylamines and free α-hydroxy carboxylic acid groups covalently grafted on cotton fiber, which was favorable for adsorption and activation of the substrates. Mechanism studies indicated that the azoxy derivatives were produced through condensation step between N-phenylhydroxylamine and nitrosobenzene rather than direct oxidation of azobenzene . The work provides an economical and environmentally friendly approach to construct single–site catalysts for the oxidation catalysis.
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JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 3
·1214-1228
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IF 4.5
Qian Guowen,Wang Junzhe,Yang Liuyimei,Zeng Zhikui,Zhao Zhenyu,Peng Shuping,Shuai Cijun
The insufficient of H 2 O 2 restricts the efficacy of chemodynamic therapy in tumor microenvironment. Calcium peroxide (CaO 2 ) is expected to solve this problem due to its H 2 O 2 -evolving ability. However, it prematurely decomposes in the moist air or water before reaching tumor site. In this study, zeolitic imidazolate framework-67 (ZIF-67) was in-situ grown on the surface of CaO 2 to construct a pH-responsive CaO 2 @ZIF-67 system and then incorporated into poly-L-lactic acid (PLLA) to prepare PLLA/CaO 2 @ZIF-67 scaffold by selective laser sintering technology. On the one hand, ZIF-67 is used as a chemodynamic therapy agent due to the release of cobalt ions after degradation. On the other hand, ZIF-67 can serve as protective layers to prevent premature decomposition of CaO 2 due to its hydrophobic properties, and then CaO 2 is exposed and reacts with water to form H 2 O 2 after the pH-responsive degradation of ZIF-67 under tumor acidic microenvironment. Results showed that the PLLA/CaO 2 @ZIF-67 scaffold could sustainedly produce H 2 O 2 under acidic pH and achieve 84.64% antitumor ratio against MG-63 cells. In addition, the scaffold also promoted proliferation and osteogenic differentiation of mouse bone marrow mesenchymal stem cells due to the release of calcium ions. The prepared PLLA/CaO 2 @ZIF-67 scaffold with chemodynamic antitumor and osteogenic effects has great potential to treat tumorous bone defect.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2022
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IF 8.025
Yi Zhang,Wenjie Wang,Zongju Chen,Huihong Shi,Wenzhe Zhang,Xiucheng Zhang,Xin Hua
Artificial bone materials are in great need due to a lot of bone injuries. Herein, collagen/nano-hydroxyapatite (Col/nHA, C-H) composite nanospheres were obtained by in-situ mineralization, and poly L-lactic acid/collagen/nano-hydroxyapatite (PLLA/Col/nHA, P-C-H) was further prepared by high-speed shear emulsification method. The interfacial properties and structure between PLLA and nHA are regulated by the adhesive property of Col. The morphology, structure and properties of P-C-H microsphere were characterized in detail by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET) and simulated degradation of PBS in vitro. The results show that C-H is uniformly distributed in P-C-H microspheres, and a mesoporous material with a “pomegranate” structure and a particle size of 5–30 μm is self-assembled based on C-H multiple composite microspheres. It is beneficial to the sustained-release degradation of P-C-H and the retention/release of Ca 2+ . The 60-day PBS degradation shows that PLLA delays the degradation of nHA, making the degradation rate of P-C-H basically consist with the human bone healing cycle. The co-culture of P-C-H with MC3T3-E1 cells shows that P-C-H has high biocompatibility and no cytotoxicity. The cell viability is higher than 100 % in 72 h, indicating P-C-H has a proliferation effect on cell growth. Alkaline phosphatase and quantitative real-time PCR test show a positive promotion of P-C-H in cell proliferation and differentiation. The multi-layered P-C-H microspheres have an application potential in bone tissue engineering.
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JOURNAL OF RARE EARTHS
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2022
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IF 4.632
Huazhen Liao,Song Ye,Xinling Xu,Peixuan Lin,Ling Pan,Deping Wang
Integration of strong upconversion emission with deep tissue penetration and stable photothermal generation is of great significance for imaging-guided photothermal therapy under infrared excitation. Herein, the NaYF 4 :Yb 3+ ,Ho 3+ ,Ce 3+ @NaGdF 4 :Yb 3+ ,Nd 3+ @NaGdF 4 core-shell-shell upconversion nanoparticles (UCNPs) with increasing Ce 3+ doping concentration were firstly synthesized, in which the size manipulation, enhanced red to green emission intensity ratio ( I R / I G ), 980 and 808 nm dual-modal excitations, as well as improved total upconversion emission intensity can be achieved. After the coating of polydopamine (PDA) through dopamine spontaneous polymerization on the UCNPs surface under alkaline condition, the obtained UCNP@PDA nanocomposites show efficient photothermal effect under 808 nm excitation, while the thickness variation of PDA can be indicated by the upconversion spectra under 980 nm excitation. Interestingly, the photothermal effect of the UCNP@PDA nanocomposites with high I R / I G ratio is more stable with PDA thickness variation, which benefits from the structure design that allows PDA to simultaneously absorb the visible emission from inside UCNPs and the external 808 nm infrared light. Further in vitro cytotoxicity assay and photothermal therapy demonstrate that the UCNP@PDA nanocomposite has good biocompatibility and ability to kill tumor cells by photothermal effect under 808 nm excitation. This research may provide a nanoplatform for integrating deep bioimaging with highly stable photothermal therapy without the sacrifice of radiative transitions of rare earth ions .
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