CELLULOSE
·
2022
·Vol. 29
·期 16
·8733-8747
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IF 6.123
Zhu Qiuxiao,Wang Tingting,Wei Yuhe,Sun Xiaoping,Zhang Sheng,Wang Xuchong,Luo Lianxin
Cellulose-based triboelectric nanogenerators (TENGs) can provide power for various monitoring devices and are environmentally friendly and sustainable. Chemical functional modification is a common method to improve the electrical output performance of cellulose-based TENGs. In this work, an environmentally friendly high-performance triboelectric nanogenerator based on a polydopamine/cellulose nanofibril (PDA/CNF) composite membrane and fluorinated ethylene propylene was developed. Dopamine generates polydopamine nanoparticles through oxidative self-polymerization and adheres to the surface of nanofibers. The synergistic effect of amino group introduction and membrane surface microstructure effectively enhanced the output performance of TENGs to a certain extent. The effects of PDA content, CNF composite film thickness and different working conditions on the electrical output were systematically investigated. The optimized PDA/CNF-TENGs exhibited an enhanced electrical output performance with voltage, current, and power density values of ≈205 V, ≈20 µA, and ≈48.75 μW·cm −2 , respectively. The PDA/CNF-TENGs exhibited stable and identifiable signals when used as a self-powered sensor for human motion monitoring, showing the potential prospects of cellulose materials for TENGS and other electronic applications. Graphical abstract
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-10
·
IF 17.694
Yang Mingke,Wang Huishan,Zuo Julian Y.,Deng Chun,Liu Bei,Chai Liya,Li Kun,Xiao Han,Xiao Peng,Wang Xiaohui,Chen Wan,Peng Xiaowan,Han Yu,Huang Zixuan,Dong Baocan,Sun Changyu,Chen Guangjin
n-butane and isobutane are important petrochemical raw materials. Their separation is challenging because of their similar properties, including boiling point. Here, we report a zeolitic imidazolate framework-8 (ZIF-8)/N,N-Dimethylpropyleneurea (DMPU)-water slurry as sorption material to separate butane mixtures. The isobutane/n-butane selectivity of ZIF-8/DMPU-water slurries is as high as 890 with high kinetic performance, which transcends the upper limit of various separation materials or membranes reported in the literature. More encouragingly, a continuous pilot separation device was established, and the test results show that the purity and recovery ratio of isobutane product are 99.46 mol% and 87%, respectively, which are superior to the corresponding performance (98.56 mol% and 54%) of the industrial distillation tower. To the best of our knowledge, the use of metal-organic frameworks (MOFs) for gas separation in pilot scale remains underexplored, and thus this work provides a step forward to the commercial application of MOFs in gas separation.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 1
·2283-2297
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IF 5.19
Hu Yuting,Wang Shixing,Zhang Libo,Yang Fan
In wastewater, heavy metal Hg causes serious harm to ecology, so it needs to be removed. In this paper, a novel MOF adsorbent (UiO-66-QU) was prepared by modifying UiO-66-NH 2 with 4-quinolinecarboxaldehyde, which was used to selectively remove Hg(II) from water. The adsorbent was characterized using Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET), zeta potentiometer, and X-ray photoelectron spectroscopy (XPS). In order to investigate the Hg(II) adsorption performance of UiO-66-QU, the effect of time, initial concentration, pH, and temperature were carried out. Langmuir model fitting shows that the maximum adsorption capacity of UiO-66-QU for Hg(II) is 556 mg/g at 298 K. The experimental results show that UiO-66-QU has better Hg(II) adsorption capacity than UiO-66-NH 2 . The isotherm is in accordance with pseudo-second-order models. It is indicated that the adsorption process is mainly monolayer chemical adsorption. The thermodynamic parameters also indicate that the adsorption process is spontaneous and endothermic. It has excellent reusability and selectivity. XPS and the zeta potential showed that the adsorption mechanism was the complex reaction of Hg(II) with nitrogenous group. Therefore, the adsorbent has potential application prospects in removal of Hg(II) from wastewater.
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Nano-Micro Letters
·
2022
·Vol. 14
·期 1
·1-20
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IF 23.655
Song Limeng,Zhang Fan,Chen Yongqiang,Guan Li,Zhu Yanqiu,Chen Mao,Wang Hailong,Putra Budi Riza,Zhang Rui,Fan Bingbing
Traditional ceramic materials are generally brittle and not flexible with high production costs, which seriously hinders their practical applications. Multifunctional nanofiber ceramic aerogels are highly desirable for applications in extreme environments, however, the integration of multiple functions in their preparation is extremely challenging. To tackle these challenges, we fabricated a multifunctional SiC@SiO 2 nanofiber aerogel (SiC@SiO 2 NFA) with a three-dimensional (3D) porous cross-linked structure through a simple chemical vapor deposition method and subsequent heat-treatment process. The as-prepared SiC@SiO 2 NFA exhibits an ultralow density (~ 11 mg cm − 3 ), ultra-elastic, fatigue-resistant and refractory performance, high temperature thermal stability, thermal insulation properties, and significant strain-dependent piezoresistive sensing behavior. Furthermore, the SiC@SiO 2 NFA shows a superior electromagnetic wave absorption performance with a minimum refection loss ( RL min ) value of − 50.36 dB and a maximum effective absorption bandwidth ( EAB max ) of 8.6 GHz. The successful preparation of this multifunctional aerogel material provides a promising prospect for the design and fabrication of the cutting-edge ceramic materials.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 59
·88866-88881
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IF 5.19
Xia Xuewen,Li Junqi,Chen Chaoyi,Lan Yuan-Pei,Mao Xisong,Chu Zhiyao,Ning Deyang,Zhang Junshan,Liu Fengyuan
Tuning morphology and doping additional rare earth (RE) cations are potential techniques to promote the photocatalytic performance of ceria (CeO 2 ), evaluating the collaborative effects of morphology and RE dopants is significant for producing high active ceria-based catalysts. So in this work, cubic, polyhedral and rod-like nanoceria doped with 10 mol % La (lanthanum), Y (yttrium), or Sm (samarium) were synthesized by a facile template-free hydrothermal method. Phases, morphologies, oxygen vacancies (OVs) concentration, energy band structure, photo-carriers separation/recombination, and photodegradation ratio toward methylene blue (MB) dye of as prepared ceria were studied. Results show that doped CeO 2 maintains a similar morphology structure with un-doped sample and the band gap narrows slightly. Y-doped nanoceria, with an improved separation and a reduced recombination of photo-excited electrons ( e − ) and holes ( h + ), owns a higher MB photodegradation ratio than that of samples doping with La or Sm, which is measured as 79.04, 84.43, and 85.59% for Y-doped cubic, polyhedral, and rod-like CeO 2 . The collaborative influence of morphology tuning and RE (La, Y, and Sm) doping on photocatalytic performance of nanoceria includes the effects of doped elements and the formation of OVs. The elevation of OVs concentration as well as the separation efficiency of photo-generated e − / h + are suggested to further enhance the photocatalytic performance of ceria.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 23
·18758-18767
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IF 2.779
Yang Akang,Zhang Lun,Xu Yinyan,Wang Qian,Lyu Mei,Lu Hongbo,Zhu Jun
Cs 2 AgBiBr 6 is a lead-free perovskite that shows great potential to solve the toxicity and instability of organic–inorganic lead perovskite. However, because of the poor interface contact and inferior film quality, the open-circuit voltage and the power conversion efficiency of the solar cells are inhibited. Herein, the Cs 2 AgBiBr 6 film quality is improved by adding formamidinium acetate into the precursor solution. With additive regulation, the grain size increases and the film surface is more smooth. The crystal structure remains unchanged, and the defect density decreases. Correspondingly, the average power conversion efficiency of the target device increases more than 30% than the control device. The best efficiency approaches 2.09%, and the open-circuit voltage is surprisingly high at 1.23 V, the highest value reported for Cs 2 AgBiBr 6 solar cells. Moreover, the device remains more than 90% of its initial efficiency after 40 days of storage under environmental conditions, showing excellent stability. This work is therefore helpful for enhancing the efficiency and stability of inorganic lead-free perovskite solar cells toward future commercialization.
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CHINESE JOURNAL OF POLYMER SCIENCE
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2022
·Vol. 40
·期 11
·1380-1388
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IF 3.815
Gao Meng-Hang,Feng Wen,Qi Xiao-Dong,Wang Yong
Developing thermal management fabrics with good energy storage and multistimuli responsive properties is important for regulating the body temperature in complex environment. Herein, the intelligent nonwoven membranes were fabricated via a coaxial electrospinning method, resulting in a core-sheath structure with poly(ethylene glycol) (PEG) as core and polyurethane (PU) as sheath. Additionally, polypyrrole (PPy) with good light absorption ability and electrical conductivity was deposited onto the surface of the PU@PEG electrospun fibers via electrochemical polymerization. The PPy layer enabled the membranes to respond quickly to sunlight and electrical stimuli. The membranes could heat up to 86 °C under simulated sunlight within 200 s or produce remarkable electrothermal effect under a low voltage input of only 1 V, exhibiting efficient energy conversion and storage performances. The photothermal and electrothermal conversion effect could be easily adjusted by controlling the polymerization time of PPy. Therefore, the multifunctional membranes with high latent heat, good mechanical properties as well as excellent photothermal/electrothermal conversion ability are promising in personal thermal management applications.
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npj Flexible Electronics
·
2022
·Vol. 6
·期 1
·1-11
·
IF 12.019
Wu Qian,Zhu Fengbo,Wu Ziliang,Xie Yu,Qian Jin,Yin Jun,Yang Huayong
Liquid metal is an ideal conductive material for soft electronics because of its high conductivity and fluidity at room temperature. However, the large surface tension and high mass density of liquid metal make forming three-dimensional (3D) dangling structures a challenging task. Reported here is a suspension printing strategy for direct deposition of galinstan-based liquid metal into 3D dangling structures with high shape fidelity and spatial resolution (~150 μm). Acrylamide/nanoclay suspension served as a yield-stress fluid support bath, with selected hydrogen peroxide to immediately oxidize the gallium skin and strengthen the extruded liquid metal, thus continuous liquid metal filaments were deposited successfully. The subsequent photo-curing of acrylamide/nanoclay works as a resilient outer packaging, giving rise to a ~500% tensile deformation for liquid metal-hydrogel composite. This suspension printing strategy should broaden the opportunity of using 3D and functional liquid metal constructs for soft yet resilient electromagnetic devices.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2022
·Vol. 414
·期 19
·5917-5928
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IF 4.478
Zuo Jiabao,Shen Yuliang,Gao Juanjuan,Song Haiou,Ye Zhiwen,Liang Ying,Zhang Shupeng
Flexible sensing is an alternative to traditional sensing and possesses good flexibility and wearability. Intrinsically conductive polymers, particularly poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS), have received significant attention due to their high mechanical flexibility and good biocompatibility. Here, we report the design of highly conductive and electrochemically active PEDOT:PSS-coated plastic substrate electrodes by combining N-doped graphene (NG) or S-doped graphene (SG) with methanesulfonic acid-treated PEDOT:PSS (denoted as NG-f-MSA-PEDOT:PSS/PET and SG-f-MSA-PEDOT:PSS/PET) by a simple drop-coating method. At room temperature, the NG-f-MSA-PEDOT:PSS/PET electrode demonstrated the lowest detection limits of 17.09, 33.84, 28.30, and 44.96 nM for paracetamol, uric acid, dopamine, and catechol (S/N = 3), respectively. The NG-f-MSA-PEDOT:PSS/PET electrode had good anti-interference ability and reproducibility without employing expensive noble metals and requiring much effort to polish the surface of traditional glass carbon electrodes. Most importantly, this film electrode could maintain a stable electrochemical response under different bending and crease states and had excellent mechanical stability and flexibility. Graphical abstract
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 51
·77771-77787
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IF 5.19
Yu Jinming,Yan Weiwen,Zhu Bin,Xu Zimu,Hu Shuheng,Xi Wenhao,Lan Yan,Han Wei,Cheng Cheng
Carbamazepine (CBZ) is a typical psychotropic pharmaceutical which is one of the most commonly detected persistent pharmaceuticals in the environment. The degradation of CBZ in the aqueous solution was studied by a direct current (DC) gas–liquid phase discharge plasma combined with different catalysts (H 2 O 2 or Fe 2+ ) in this study. The concentrations of reactive species (H 2 O 2 , O 3 , and NO 3 − ) and •OH radical yield in the liquid were measured during the discharge process. The various parameters that affect the degradation of CBZ, such as discharge powers, initial concentrations, initial pH values, and addition of catalysts, were investigated. The energy efficiency was 25.2 mg·kW −1 ·h −1 at 35.7 W, and the discharge power at 35.7 W was selected to achieve the optimal balance on the degradation effect and energy efficiency. Both acidic and alkaline solution conditions were conducive to promoting the degradation of CBZ. Both H 2 O 2 and Fe 2+ at low concentration (10–100 mg/L of Fe 2+ , 0.05–2.0 mmol/L of H 2 O 2 ) were observed contributing to the improvement of the CBZ degradation rate, while the promotional effect of CBZ degradation was weakened even inhibition would occur at high concentrations (100–200 mg/L of Fe 2+ , 2.0–5.0 mmol/L of H 2 O 2 ). The degradation rate of CBZ was up to 99.1%, and the total organic carbon (TOC) removal efficiency of CBZ was up to 67.1% in the plasma/Fe 2+ (100 mg/L) system at 48 min, which suggested that high degradation rate and mineralization efficiency on CBZ could be achieved by employing Fe 2+ as a catalyst. Based on the intermediate products identified by Ultra Performance Liquid Chromatography Tandem Mass Spectrometry (UPLC–MS), the possible degradation pathways were proposed. Finally, the growth inhibition assay with Escherichia coli ( E. coli ) showed that the toxicity of plasma/Fe 2+ -treated CBZ solution decreased and a relatively low solution toxicity could be achieved. Thus, the plasma/catalyst could be an effective technology for the degradation of pharmaceuticals in aqueous solutions.
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JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2022
·Vol. 37
·期 3
·355-363
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IF 1.271
Kang Yonggang,Yang Wenwu,Chen Bingbing
Nitrogen(N)-doped carbon nanosheets(TCM-900) were prepared by pyrolyzing the cobalt metal organic framework(MOF) and acid treatment. The TCM-900 showed outstanding ORR performance with half-potential of 0.805 V. The density function theory(DFT) reveals the nitrogen activates the carbon atoms in the framework. The homemade ZAB with TCM-900 as ORR electrocatalyst exhibits high-power density of 45 mW·cm −2 and excellent long recharge cycling stability compared to Pt/C at 10 mA·cm −2 . This work illustrates an attractive future of the rechargeable ZAB.
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-8
·
IF 17.694
Tang Sihan,Gong Jiang,Shi Yunsong,Wen Shifeng,Zhao Qiang
Stable interfaces between immiscible solvents are crucial for chemical synthesis and assembly, but interfaces between miscible solvents have been less explored. Here the authors report the spontaneous water-on-water spreading and self-assembly of polyelectrolyte membranes. An aqueous mixture solution containing poly(ethyleneimine) and poly(sodium 4-styrenesulfonate) spreads efficiently on acidic water, leading to the formation of hierarchically porous membranes. The reduced surface tension of the polyelectrolyte mixture solution drives the surface spreading, while the interfacial polyelectrolytes complexation triggered by the low pH of water mitigates water-in-water mixing. The synergy of surface tension and pH-dependent complexation represents a generic mechanism governing interfaces between miscible solvents for materials engineering, without the need for surfactants or sophisticated equipment. As a proof-of-concept, porous polyelectrolyte hybrid membranes are prepared by surface spreading, exhibiting exceptional solar thermal evaporation performance (2.8 kg/m 2 h) under 1-sun irradiation.
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