CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Wei Huang,Hongqiang Li,Longzhu Zheng,Xuejun Lai,Hang Guan,Ye Wei,Haiyang Feng,Xingrong Zeng
To promote the sustainable development of modern society, the functional wood-based materials have been one of the most promising candidates to alleviate the deterioration of environment by partially replacing the polymer materials derived from petroleum. However, the hydrophilicity of natural wood greatly limited its practical applications. Herein, a superhydrophobic and conductive wood sponge (P-rGO@WS) for piezoresistive pressure senor is fabricated through chemical treatment, coverage and reduction of graphene oxide (GO) and subsequent modification by polydimethylsiloxane (PDMS). The wood-based sensor exhibits high sensitivity up to 4.93 kPa −1 in 0–5 kPa and a fast response time of 160 ms. Owing to the effective stress transfer by the ordered lamellar architecture with arched layers and the mechanical compressibility improved by the rGO and PDMS layers, the sensor maintains stable electrical response even after undergoing 1000 compression cycles at a strain of 60%, illustrating the excellent fatigue resistance. Moreover, the sensor possesses superhydrophobicity with a high water contact angle of 152° and still remains superhydrophobic state even under compression. Importantly, the sensor is successfully applied for detecting human motions including wrist pulse, voice recognition and various body activities. The findings conceivably stand out a sustainable method to fabricate high-performance piezoresistive pressure senor derived from biomass materials for wearable electronics even under humid environment .
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DIAMOND AND RELATED MATERIALS
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2021
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IF 3.315
Qiuxiang Wang,Zongxue Yu,Yuchuan Liu,Ximei Zhu,Runxuan Long,Xuyang Li
In this study, a graphene oxide layered double hydroxide (GO/Co-Al LDH) composite was prepared by electrostatic self-assembly method. Then GO and Co-Al LDH were assembled on the CA membrane by vacuum filtration to construct a high-efficiency composite membrane . The prepared CA/GO/Co-Al LDH composite membrane has excellent pollutant separation performance and hydrophilicity that the fluxes and the rejection rates for rhodamine b (RhB), methylene blue (MB), Congo red (CR), petroleum ether, n-hexane and mesitylene were excellent, even rejection rates reached more than 90%. The separation performance and hydrophilicity of GO membranes can be improved by changing the content of Co-Al LDH.
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ACS Applied Materials & Interfaces
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2021
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IF 9.229
Zhi-Guo Wang,Jia-Cheng Lv,Zi-Li Zheng,Ji-Guang Du,Kun Dai,Jun Lei,Ling Xu,Jia-Zhuang Xu,Zhong-Ming Li
Innovations of transistors toward miniaturization and integration aggravate heat accumulation of central processing units (CPUs). Thermal interface materials (TIMs) are critical to remove the generated heat and to guarantee the device reliability. Herein, maltose-assisted mechanochemical exfoliation was proposed to prepare maltose-g-graphene as a structural motif of TIMs. Then, maltose-g-graphene/gelatin composite films with a bilayer structure were prepared by two-step vacuum filtration to construct effective thermally conductive pathways consisting of the directionally arranged and tightly packed maltose-g-graphene. The bilayer composite film exhibited a remarkable in-plane thermal conductivity (30.8 W m–1 K–1) and strong anisotropic ratio (∼8325%) at 40 wt % maltose-g-graphene addition. More intriguingly, the cooling effect on CPUs was significantly better for the bilayer composite films than commercial thermal pads as TIMs. The outstanding thermally conductive stability in resistance to instantaneous and prolonged thermal shocks as well as fatigue stability was gathered. Our work offers a valuable reference to design and fabricate high-performance TIMs for CPU cooling to surmount harsh application scenarios.
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JOURNAL OF MEMBRANE SCIENCE
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2021
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IF 8.742
Yuefei Song,Yongxin Wang,Nan Zhang,Xifan Li,Xueshuang Bai,Tiemei Li
This present work validated the feasibility of high-efficient removal of series of cationic small-sized contaminants such as pharmaceutically active compounds (PhACs), dyes and hardness-forming ions in aqueous solution by novel thin-film nanocomposite (TFN) membranes. Thanks to the positively participated effect on interfacial polymerization for both nanostructured quaternized carbon-based nanoparticles (QCBNPs), skin-layer characteristics including smoothness, wettability and positive charge as well as nanoporous loose body (porosity, thickness) of the resultant TFN membranes were all markedly improved after doping modification. On this basis, compared with the neat thin-film composite membrane , these modified TFN membranes showed perfect mirror-symmetric transformation in the rejection orders of the selected electrolytes, dyes and PhACs with different charge properties, respectively. Of course, these changes were all accomplished in the process of increasing each small-sized contaminant removal rate, membrane permeability and fouling resistance. Specifically, the optimal TFN-QCQDs membrane possessed high permeate flux of 23.8 L m −2 ·h −1 bar −1 , 99.7%, 99.5%, 98.9%, 98.4% and 95.7% rejection rates for cationic trimethoprim, atenolol, rhodamine B, methylene blue and MgCl 2 , flux recovery ratio of 85.5%, which increased by 53.6%, 6.75%, 5.96%, 2.17%, 2.21%, 17.0% and 29.6%, respectively, compared with the neat membrane. In brief, both QCBNPs embedded nanocomposite membranes provide good alternative options for efficient and sustainable removing series of cationic small-sized contaminants by one step.
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INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
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2021
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IF 2.826
Suling Zhang,Weixuan Yao,Chanyuan Zhou,Jiye Wang,Hongting Zhao
In this study, we report a facile method to prepare magnetic zeolitic imidazolate framework-7@graphene oxide (mag-ZIF-7@GO) composites with the assistance of polydopamine. Moreover, their potential for extracting fungicides from environmental water and soil samples is evaluated. Combining ZIF units and GO layers synergistically enhances the preconcentration of fungicides. A sensitive magnetic solid-phase extraction method based on mag-ZIF-7@GO coupled to LC-MS is developed to determine seven fungicides (pyrimethanil, triadimenol, flutriafol, tebuconazole, hexaconazole, diniconazole and bitertanol) as a function of optimised salt concentration, pH, extraction time, and desorption time. Under optimal conditions, the method exhibits good linearity, repeatability, and reproducibility. The limits of detection and limits of quantification for the seven fungicides are 0.58–2.38 ng/L and 1.95–7.94 ng/L, respectively. Furthermore, the proposed method is applied to determine trace fungicides in environmental water and soil samples, with recoveries of 81.8–96.7%, 87.2–96.3%, and 82.4–93.4% for pond water, river water, and soil, respectively. Therefore, this method has great potential for trace analysis of pollutants in complex environmental matrices.
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Green Energy & Environment
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2021
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IF 8.207
Fantao Meng,Yuang Zhang,Shufen Zhang,Benzhi Ju,Bingtao Tang
Along with the environmental pollution, the scarcity of clean water seriously threatens the sustainable development of human society. Recently, the rapid development of solar evaporators has injected new vitality into the field of water purification. However, the industry faces a considerable challenge of achieving comprehensive purification of ions, especially the efficient removal of mercury ions. In this work, we introduce an ideal mercury-removal platform based on facilely and cost-effectively synthesized polysulfide nanoparticles (PSNs). Further development of PSN-functionalized reduced graphene oxide (PSN-rGO) aerogel evaporator results in achieving a high evaporation rate of 1.55 kg m −2 h −1 with energy efficiency of 90.8% under 1 sun. With the merits of interconnected porous structure and adsorption ability, the photothermal aerogel presents overall purification of heavy metal ions from wastewater. During solar desalination, salt ions can be rejected with long-term stability. Compared with traditional water purification technologies, this highly efficient solar evaporator provides a new practical method to utilize clean energy for clean water production.
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Biomaterials Science
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2021
·Vol. 9
·期 10
·3804-3813
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IF 6.843
Yuan-Fu Ding,Cheryl H. T. Kwong,Shengke Li,Ya-Ting Pan,Jianwen Wei,Lian-Hui Wang,Greta S. P. Mok,Ruibing Wang
Nano-graphene oxide (NGO) has attracted increasing attention as an advanced drug delivery system. However, the current surface functionalization and drug-loading of NGO either rely on π–π stacking that is limited to aromatic molecules, or covalent conjugation that requires tedious synthesis. Herein, we developed the first cucurbit[7]uril (CB[7])-conjugated NGO (NGO-CB[7]) that allows non-covalent, modular surface functionalization and drug loading via not only traditional π–π stacking interactions between the NGO surface and functional molecules, but also strong host–guest interactions between CB[7] and guest payloads or adamantane (ADA)-tagged functional molecules, for more versatile biomedical applications. To this end, chlorin e6 (Ce6, a photosensitizer), banoxantrone dihydrochloride (AQ4N, a hypoxia-responsive prodrug) and oxaliplatin (OX, a guest of CB[7]) were co-loaded onto NGO-CB[7] via π–π stacking and host–guest interactions, respectively. Subsequently, ADA-tagged hyaluronic acid (ADA-HA) wrapped NGO-CB[7] non-covalently via CB[7]-ADA host–guest interactions to improve the physiological stability and overall biocompatibility of this supramolecular nanosystem, and to enable targeted delivery into cancer cells with CD44 receptors overexpressed. Remarkably, this supramolecular nanomedicine exhibited significant antitumor efficacy via combined photothermal/photodynamic therapy (PTT/PDT) from NGO/Ce6, as well as dual chemotherapy from OX and AQ4N (activated by PDT-enhanced hypoxia), in vitro and in vivo. This study not only offers a new supramolecular inorganic/organic hybrid nanosystem for multi-modality cancer therapy, but may also provide important new insights into noncovalent functionalization of other carbon nanomaterials and inorganic nanomaterials leading to multifunctional drug delivery systems.
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CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Jiaxin Wang,Jinmei He,Lili Ma,Yali Yao,Xuedan Zhu,Lei Peng,Xiangrong Liu,Kanshe Li,Mengnan Qu
Textile-based triboelectric nanogenerators (t-TENGs) have attracted extensive attention in wearable power source and movement monitoring. However, the electrical output performance and environmental adaptability of t-TENGs in single-electrode mode are still unsatisfactory, which significantly limits their applications. This limitation is especially more pronounced in humid environments . In the present study, a humidity-resistant and stretchable single-electrode t-TENG (abbreviated as PFL@WFCF-TENG) consisting of the porous flexible layer (PFL) and waterproof flexible conductive fabric (WFCF) has been designed to improve the output performance. Considering the three-dimensional structure and excellent superhydrophobicity of PFL and superior conductivity of WFCF, the resultant PFL@WFCF-TENG (2 × 4 cm 2 area) has high outputs (~135 V, ~7.5 μA, 26 μC/m 2 , 631.5 mW/m 2 ) and favorable humidity-resistant (80% RH). Based on these excellent features, the proposed PFL@WFCF-TENG is expected to be applied for intelligent alarming, haptic sensing, and energy harvesting. Moreover, combined with the microelectronic module, a portable and wearable self-powered haptic controller based on the PFL@WFCF-TENG has been designed for various human–machine interface (HMI) scenarios, such as controlling of the lamp, electronic badge, computer application, and humidifier. The PFL@WFCF-TENG proposed in this study not only provides a feasible solution for developing wearable electronic devices with high electrical output even in high-humidity environments but also shows promising applications in a variety of areas, including wearable power supply, portable computer peripherals, intelligent robots and security systems.
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TRIBOLOGY INTERNATIONAL
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2021
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IF 4.872
Ting Xie,Yaru Shi
The friction transfer of polytetrafluoroethylene (PTFE) composites is closely related to their tribological performances . To clarify the effects of LaF 3 /CeF 3 on the friction transfer of PTFE-based composites, the transfer film thickness and coverage were investigated under different loads or speeds. The results show that the addition of LaF 3 /CeF 3 can decrease the transfer film thickness and increase the transfer film coverage to form a thin and uniform transfer film, and the co-filling of LaF 3 and CeF 3 is better in promoting friction transfer of PTFE-based composites than single addition of LaF 3 or CeF 3 . The correlation between transfer film and tribological properties was also analyzed, which indicates that the friction transfer is beneficial for improving the tribological properties of PTFE composites.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2021
·Vol. 138
·期 37
·50938
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IF 3.125
Jingguang Wang,Zemin Xia,Jian Liu,Naiyue Zhang,Wuyi Zhou,Zichong Zhong,Zhitian Luo,Wenyu Li,Zhuohong Yang,Yang Hu
In this work, the near-infrared (NIR) light-responsive shape memory scaffolds with hierarchical porous structures are designed and facilely formed by freeze drying of 3D printed viscous gel-like pickering emulsions, which are stabilized by hydrophobically modified graphene oxide (g-GO) and silica nanoparticles, and contain thermo-responsive poly( d , l -lactic acid-co-trimethylene carbonate) (PLMC) in the oil phase. The prepared scaffolds display an interconnected filament structure with hierarchical pores and high porosity. The incorporation of g-GO nanoparticles into PLMC matrix prompts that the scaffold shape memory can be triggered by NIR light with fast shape recovery. Moreover, the in vitro mineralization experiment shows that the scaffolds have biological activity, and the drug release study demonstrates that the scaffolds can be used as drug carriers with efficient drug release capacity. Furthermore, cell culture assays based on mouse bone mesenchymal stem cells exhibit that the scaffolds own good cytocompatibility. Therefore, the facile preparation and remote activation of the shape memory nanocomposite scaffolds with hierarchical porous structure and multifunctionality represents a highly attractive candidate as minimally invasive implantation scaffolds for bone tissue engineering applications.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2021
·Vol. 413
·期 15
·4013-4022
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IF 4.157
Liu Chao,Zhao Yunmeng,Xu Di,Zheng Xinxin,Huang Qing
A facile and green approach to the preparation of peroxidase-like nanozymes by reducing and functionalizing graphene oxide (rGO) with Ganoderma polysaccharide (GP) has been achieved in this work. Our results showed that the as-fabricated nanozyme, namely rGO-GP, possessed the excellent property of simulating peroxidase with higher catalytic activity compared with GO or rGO obtained by using chitosan, which may be due to the better dispersion of rGO-GP in the solution. Steady-state kinetics studies further showed that the catalytic process conformed to Michaelis-Menten equation and ping-pong mechanism. Benefiting from the excellent peroxidase property of rGO-GP, we have also successfully established a highly sensitive and selective colorimetric detection approach to trace detection of l -cysteine ( l -Cys). The limit of detection (LOD) of l -cysteine is 0.1 μM and the linear detection range is 2–30 μM. Furthermore, the nanozyme was successfully applied for detecting l -cysteine in serum. This work therefore demonstrates the advantages of rGO-GP as an effective nanozyme in both its green synthesis and detecting application.
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Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 24
·7697-7705
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IF 7.393
Wei Luo,Yi Liu,Chuangye Wang,Dan Zhao,Xiaoyan Yuan,Lei Wang,Jianfeng Zhu,Shouwu Guo,Xingang Kong
MAX phase solid solutions have attracted considerable attention owing to their unique structure and properties. However, the synthesis of MAX phase solid solutions doped with multi-elements at M-sites still remains a challenge. Herein, a series of (V1−x−yTixCry)2AlC solid solution powders are prepared through the reactions of V, Ti, Cr, and Al metals and graphite in molten NaCl/KCl salts, and their electromagnetic (EM) wave absorption properties are systematically investigated. In comparison with Ti2AlC, V2AlC and Cr2AlC, (V1−x−yTixCry)2AlC solid solutions exhibit prominent EM absorption performance. Specifically, the minimum reflection loss (RL) value of (V0.6Ti0.2Cr0.2)2AlC is −56.2 dB at 12.07 GHz with a sample thickness of 1.75 mm, and the optimized effective absorption bandwidth (EAB, RL < −10 dB) covers the whole X band with 4.16 GHz at 2.00 mm. Furthermore, the strong dielectric resonance is presented in the range of 7–13 GHz for all (V1−x−yTixCry)2AlC, indicating that both dipole polarization and conduction loss contribute to the excellent dielectric loss of doped MAX phases. Theoretical analysis demonstrates that the polarization loss is attributed to the anisotropic conductivity of MAX phases and M-site doping, which further weakens the electric conductivity. As a result, plenty of dipoles are involved and polarization relaxation occurred when the (V1−x−yTixCry)2AlC solutions are radiated by EM. Considering the numerous kinds of MAX phase solid solutions, this work paves the way to study the EM absorption performance of high-entropy or other MAX phase solid solutions.
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