INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·Vol. 48
·期 83
·32459-32468
·
IF 7.2
Chengguo Yan,Qinan Wu,Jiaguang Zheng,Dan Li,Jiahuan He,Yugang Shu,Meijia Liu,Liuting Zhang
NaBH 4 has been considered as one of the ideal hydrogen carriers with comparatively high hydrogen capacities towards traditional hydrogen storage materials . However, the hydrogen generation from NaBH 4 needs excess water and costly catalysts to achieve a complete and fast hydrogen release. Herein, we report an innovative strategy to use solid-state multi-hydroxyl mannitol as a reactant towards NaBH 4 , which brings fast and controllable hydrogen release below 80 °C. More than 4.1 wt% H 2 (83% of the theoretical capacity) could be released totally from the NaBH 4 -mannitol composite with high purity. Structural and morphological studies further reveal that mannitol acts as a bi-functional additive to react with NaBH 4 during hydrogen release and protect NaBH 4 from moisture during storage. This work shows potential in developing all-solid-state hydrogen production systems with high-capacity borohydrides .
研究领域:
材料科学
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氢能
·
化学工程
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Shouli Bai,Shiyu Jia,Sitong Yan,Yingying Zhao,Pinggui Tang,Ruixian Luo,Yongjun Feng,Dianqing Li,Aifan Chen
Solar energy is used as a driving force to create electron-hole pairs on the surface of electrodes, releasing hydrogen and oxygen through oxidative reductionism, which can directly generate clean energy by a lower resource and environmental costs. The novel ternary photoanode was successfully prepared by Bi nanoparticles modified on BiVO 4 /ZnFe 2 O 4 heterojunction using simple and effective SILAR and impregnation reduction method. Based on the successful construction of heterostructure to accelerate the separation of electron-hole pairs, the addition of plasmonic nanoarchitectures can effectively capture photons and improve the water oxidation performance of semiconductors through the localized surface plasmon resonance (LSPR). The ternary photoanode shows a significant improvement with bare BiVO 4 photoanode, its photocurrent density reachs 2.72 mA cm −2 at 1.23 V (vs. RHE), which is 4.2 times higher than that of pure BiVO 4 photoanode (0.65 mA cm −2 ). The IPCE and the ABPE are substantially increased by 2.7 times and 5 times higher than single component, respectively.
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CRYSTAL GROWTH & DESIGN
·
2012
·
IF 4.72
Jiaheng Wang,Han Wang,Jingjing Jiang,Wenjie Gong,Da Li,Qiang Zhang,Xinguo Zhao,Song Ma,Zhidong Zhang
Magnetic Fe3O4 nanoparticles (NPs) encapsulated semimetal Bi nanocomposites were fabricated by a solvothermal method based on the nonpolar 1-octadecene. Bi and Fe ions were introduced into the oil phase by the complex with sodium oleate in the as-prepared solution. The nanocomposites were oil soluble and dispersed well in any nonpolar solution with the surface modification of oleic acid. It is argued that hydroxyl groups as the reductant induce the formation of Bi microspheres and prevent Fe3O4 NPs from oxidation. The frequency dependence of complex permittivity and permeability indicates that Bi and interface polarization of Bi/Fe3O4 nanocomposites are responsible for the dielectric resonances, and superparamagnetic Fe3O4 NPs weaken the natural resonance.
研究领域:
材料科学
·
物理学
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jiahao Lu,Ruiying Zhai,Yijie Yang,Sisi Chen,Xiaoqi Sun
Herein, a series of environmentally friendly rare earth doped yellow pigments with near-infrared (NIR) properties were synthesized using solid-state reaction at a high temperature of 1200 °C, with the general formula Y 2−x Bi x MoO 6 . The prepared pigments were characterized using analytical techniques, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), CIE 1976 color space system, ultraviolet–visible/near infrared (UV–Vis/NIR) spectroscopy. Results indicated that its color changes from white to yellow after doping with Bi 2 O 3 in Y 2 MoO 6 . As the doping amount of Bi increased, the yellow color gradually deepened. All the doped samples exhibited a monoclinic structure with space group C 2/ c (15). When the optimal doping ratio was Y 1.8 Bi 0.2 MoO 6 (i.e., x = 0.2), the NIR reflectance (R%) and NIR solar reflectance (R∗%) of the pigment sample both exceeded 100 %. In the study of acid and alkali resistance, the color difference value ΔE∗ before and after pigment soaking was less than 5, indicating good chemical stability. In the coating study, the temperature difference between the air inside the pigment-coated house model and the air inside the uncoated house model reached 7 °C after 20 min of irradiation using an infrared lamp, suggesting that the prepared pigment reflects solar thermal radiation well and demonstrates good thermal insulation performance.
研究领域:
材料科学
·
环境科学
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Small Methods
·
2023
·Vol. 7
·期 9
·2300701
·
IF 12.4
Zhuzhu Shao,Xuan Zhang,Jingfeng Liu,Xingang Liu,Chuhong Zhang
Flexible piezoelectric energy harvesters (PEHs) have gained substantial attention owing to their wearability, breathability, and sustainable self-powered supply. However, existing film PEHs cannot identify forces in different bending directions, limiting their applications in wearable electronics and artificial intelligence. This study constructs a fabric PEH for the first time by introducing piezoelectric anisotropic BaTi 2 O 5 nanorods (BT2-nr) into piezoelectric polyvinylidene fluoride (PVDF) nanofibers with a bi-oriented architecture, in which BT2-nr uniformly aligns in the PVDF nanofiber during electrospinning. The dual-orientation feature endows the flexible PEH with anisotropy, which can sensitively identify the forces at different bending directions (e.g., bent vertically, parallelly, or twisted by 45° along the fiber orientations). Simultaneously, the composite PVDF/BT2 PEH containing 15 wt.% BT2-nr delivers an optimal piezoelectric output of 31.2 V with a high sensitivity of 5.22 V N −1 . The developed anisotropic PEH can be used as a self-powered pressure sensor for multimodal intelligent biomonitoring of human movement. This study provides a feasible strategy for fabricating self-powered flexible PEHs with high electromechanical conversion efficiency and multifunctionality for wearable piezoelectric pressure sensors.
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PubMed
高影响因子
Sustainable Chemistry and Pharmacy
·
2023
·
IF 6
Qiuyun Zhang,Yanting Lei,Luyan Li,Jiao Lei,Mengmeng Hu,Taoli Deng,Yutao Zhang,Peihua Ma
A novel Bi-based metal-organic framework impregnated phosphomolybdic acid (PMA@Bi-MOF) catalyst has been fabricated via a simple hydrothermal procedure, and successfully applied in the preparation of biodiesel using oleic acid (OA) as the raw material. The PMA@Bi-MOF composites were exhaustively characterized with the help of FTIR , XRD, TPD-NH 3 , SEM-EDX, N 2 -physisorption, TGA , and XPS analyses. Experimental findings showed that the PMA@Bi-BTC exhibited a higher activity than that of PMA@Bi-BDC and Bi-BTC, attributed to its textural property, the presence of more acid sites with higher strength, and synergistic catalytic effects between PMA and Bi-BTC. The optimum conditions for esterification of OA, with a conversion of up to 92.5%, were found to be a molar ratio of methanol to OA of 20:1 and 0.15g PMA@Bi-BTC catalyst at 160 °C in 3 h. Meanwhile, reused studies indicated that the OA conversion reached more than 80% after seven reaction cycles. Furthermore, the activation energy of esterification catalyzed by PMA@Bi-BTC was also calculated as 54.8 kJ/mol. It is expected that our study provides an efficient route to biofuel production involving polyoxometalates/MOF synergistic catalysts.
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SmartMat
·
2023
·
IF 20.4
Yushan Yang,Kaicong Chen,Yipeng Chen,Chao Wang,Baokang Dang,Yingying Li,Ming Liu,Qingfeng Sun
Combination of flexible multifunctional stealth technology properties such as electromagnetic (EM) and infrared (IR) stealth is crucial to the development of aerospace, military, and electronic fields, but the synthesis technology still has a significant challenge. Herein, we have successfully designed and synthesized highly flexible MXene@cellulose lamellae/borate ion (MXCB) sheets with strong high-temperature EM-IR bi-stealth through sequential bridging of hydrogen and covalent bonds. The resultant MXCB sheets display high conductivity and good mechanical features such as flexibility, stretchability, fatigue resistance, and ultrasonic damage. MXCB sheets have a high tensile strength of 795 MPa. Furthermore, MXCB sheets with different thicknesses indicate exceptional high-temperature thermal-camouflage characteristics. This reduces the radiation temperature of the target object (>300°C) to 100°C. The conductivity of MXCB sheet with 3 μm thickness is 6108 S/cm and the EM interference (EMI) shielding value is 39.74 dB. The normalized surface-specific EMI SE absolute shielding effectiveness (SSE/ t ) is as high as 39312.78 dB·cm 2 /g, which remained 99.39% even after 10,000 times repeated folding. These multifunctional ultrathin MXCB sheets can be arranged by vacuum-assisted induction to develop EM-IR bi-stealth sheet.
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Materials
·
2023
·Vol. 16
·期 6
·2277
·
IF 3.4
Si Xu,Shanshan Liang,Bing Wang,Jiali Wang,Meng Wang,Lingna Zheng,Hao Fang,Tingfeng Zhang,Yi Bi,Weiyue Feng
Pre-coating with a protein corona on the surface of nanomaterials (NMs) is an important strategy for reducing non-specific serum protein absorption while maintaining targeting specificity. Here, we present lipoic acid-terminated polyethylene glycol and transferrin bi-functionalized MoS2nanosheets ([email protected]2-PEG NSs) as a feasible approach to enhance cellular uptake.[email protected]2-PEG NSs can maintain good dispersion stability in cell culture medium and effectively protect MoS2NSs from oxidation in ambient aqueous conditions. Competitive adsorption experiments indicate that transferrin was more prone to bind MoS2NSs than bovine serum albumin (BSA). It is noteworthy that single HepG2 cell uptake of[email protected]2-PEG presented a heterogeneous distribution pattern, and the cellular uptake amount spanned a broader range (from 0.4 fg to 2.4 fg). Comparatively, the intracellular Mo masses in HepG2 cells treated with[email protected]2-PEG and MoS2-PEG showed narrower distribution, indicating homogeneous uptake in the single HepG2 cells. Over 5% of HepG2 cells presented uptake of the[email protected]2-PEG over 1.2 fg of Mo, about three-fold that of[email protected]2-PEG (0.4 fg of Mo). Overall, this work suggests that Tf coating enhances the cellular uptake of MoS2NSs and is a promising strategy for improving the intracellular uptake efficiency of cancer cells.Keywords:bi-functionalization;[email protected]2-PEG nanosheets;HepG2 cellular uptake
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PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·
IF 19
Qiang Wang,Mengjie Wang,Li Wen,Wei Zeng,Binghui Ge,Chaofeng Zhang,Yang Yue,Siliang Wang
The emerging aqueous zinc-ion batteries (ZIBs) have received extensive attention and research due to their unique advantages of low cost, safety, and environmental friendliness. However, the development of appropriate cathode materials to improve battery performance remains a major challenge. Herein, a new MXene and Bi (MXene/Bi) composite material is first applied as the (de)intercalation cathode of ZIB. The dispersed MXene nanosheets in the composite materials greatly improve the conductivity and hydrophilicity of the electrode, and prevent the stacking and the volume expansion in the charge/discharge process of 2D Bi fragments. The experimental results show that composite MXene/Bi electrode has remarkable capacity and ultralong life. Next, the good kinetics and (de)intercalation energy storage mechanism of ZIB are revealed through abundant electrochemical tests and ex situ characterization. The quasi-solid-state (QSS) ZIB is also constructed, showing superior electrochemical performance, flexibility, pressure resistance, and heat resistance. Besides, the QSS ZIB can be used directly as a self-powered pressure sensor to monitor the external pressure in real time based on the response current. This study not only demonstrates that MXene/Bi is a potential cathode for ZIBs, but also offers a feasible path to explore and design the next generation of high-performance multifunctional ZIBs.
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Batteries & Supercaps
·
2023
·Vol. 6
·期 5
·e202300055
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IF 5.7
Meixue Wang,Huijun Li,Xiaoqin Cheng,Shizhen Tian,Xiaomin Wang
Graphical New bismuth anode material : As double encapsulated bismuth-based composite was investigated in a sodium half-cell, exhibiting good cycling stability and high discharge capacity. The introduction of nitrogen-doped carbon and graphene has resulted in a three-dimensional interconnected network structure, rich reaction sites and sites. This structure achieves a high degree of electrode reversibility and increases the electrical capacity. Bismuth (Bi) has promising applications as anode in sodium-ion batteries (SIBs) due to its suitable alloy voltage, unique lattice structure and high volumetric specific capacity. However, the severe structural degradation and poor cycling performance of Bi-anode during cycling limits its practical application. Here, we designed and synthesized graphene-encapsulated nitrogen-doped carbon@bismuth (N−C@Bi/G) composites as anode materials for SIBs by a two-step hydrothermal and thermal treatment method to solve the above problems. The N−C@Bi/G composite anode material exhibits excellent sodium storage performance, high capacity (280 mAh g −1 at 0.1 A g −1 and an initial coulombic efficiency of 78.87 %) and long-term cycling stability (260 mAh g −1 after 1000 cycles at 2 A g −1 ). Electrochemical analysis and DFT calculations show that the fast reaction kinetics of N−C@Bi/G is directly related to the introduction of nitrogen-doped carbon enriching the pore structure and increasing the active sites. Meanwhile, through the aid of in-situ X-ray diffraction (XRD), the reaction mechanism and interphase evolution of N−C@Bi/G composite are revealed, which provides an important theoretical basis for the application of SIBs.
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Processes
·
2022
·Vol. 11
·期 1
·115
·
IF 3.352
Ting Gao,Jingqi Lin,Ke Zhang,Mohsen Padervand,Yifan Zhang,Wei Zhang,Menglin Shi,Chuanyi Wang
Since conventional techniques are ineffective for NO removal at low concentrations, photocatalysis has become attractive in this regard, recently. However, in practice, photocatalytic NO removal has drawbacks such as limited light absorption and the proclivity of producing toxic by-products. To address these issues, novel defective Bi/Bi3NbO7structures with good porosity were fabricated by a solvothermal method and used for enhanced photocatalytic NO removal under visible light irradiation. The morphological and structural properties of the prepared materials were comprehensively analyzed. The optimal photocatalytic activity of pore-defective Bi/Bi3NbO7for NO removal was 60.3%, when the molar ratios of urea and Bi(NO)3•5H2O to pristine Bi3NbO7were 1:25 and 1:2, respectively, under the following operational conditions: NO concentration of 700 ppb, catalyst dosage of 50 mg and irradiation time of 14 min. The induced defects and the surface plasmon resonance (SPR) effect of Bi nanodots made remarkable contributions to improving the photocatalytic NO removal as well as inhibiting the toxic byproduct NO2. The photocatalytic NO removal pathway over the prepared photocatalysts was further mechanistically clarified taking advantage of EPR results and scavenging experiments. Considering the increased NO generation in the atmosphere, this work may provide novel insights for designing effective porous photocatalysts to treat gaseous toxic pollutants.Keywords:photocatalysis;Bi3NbO7;surface plasmon resonance;NO removal;defects
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Materials Research Express
·
2019
·Vol. 6
·期 4
·046532
·
IF 1.449
Chen Chen,Binxu Lan,Kang Liu,Hongbo Wang,Yuxin Deng,Yufei Zuo,Xiaohan Xu,Cheng Chen,Zhen Chen,Ping Luo,Shijie Dong
Herein, we prepared Al–Bi–NaCl composites by mechanical ball milling and investigated the effects of ball milling time on their hydrogen production performance, additionally analyzing energy conversion during ball milling. Subsequently, the effects of Bi and NaCl content and initial temperature on hydrogen production performance were studied. Moreover, the phase, morphology, and elemental composition of these composites and by-products of their hydrolysis were studied by a range of instrumental techniques. An optimal hydrogen yield of 1140 ml g−1 (in 1 h) was obtained at a milling time of 4 h, and the results of instrumental characterization showed that no new phase was formed during ball milling (i.e., Al, Bi, and NaCl were only mechanically mixed) and that the constituent elements were evenly distributed in the composite. Hydrolysis by-products were identified as porous Al(OH)3 and AlO(OH), that is, Bi did not participate in the reaction.
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