JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Shuaishuai Man,Dehui Luo,Qing Sun,Haifeng Yang,Hebin Bao,Ke Xu,Xuzhong Zeng,Miao He,Zehao Yin,Li Wang,Zhihong Mo,Wenjing Yang,Xueming Li
Stable electrode materials with high catalytic activity are urgently required for electrochemical degradation of refractory organic pollutants in wastewater treatment . Herein, high conductive MXene (Ti 3 C 2 T x ) was firstly fabricated by electrophoretic deposition (EPD) as an interlayer for preparing a novel PbO 2 electrode. The well-conducted Ti 3 C 2 T x interlayer significantly improved the electrochemical performance of the EPD-2.0/PbO 2 (EPD time was 2.0 min) electrode with the charge transfer resistance decreased by 9.51 times, the inner active sites increased by 5.21 times and the ∙OH radicals generation ability enhanced by 4.07 times than the control EPD-0/PbO 2 anode. Consequently, the EPD-2.0/PbO 2 electrode achieved nearly 100% basic fuchsin (BF) and 86.78% COD removal efficiency after 3.0 h electrolysis. Therefore, this new PbO 2 electrode presented a promising potential for electrochemical degradation of BF and the new Ti 3 C 2 T x middle layer could also be used to fabricate other efficient and stable anodes, such as SnO 2 , MnO 2 , TiO 2 , etc.
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高影响因子
CHEMISTRY OF MATERIALS
·
2022
·
IF 10.508
Yuqi Fan,Qi Liu,Zilong Zhang,Shui-Yang Lien,Yi Xie,Wanzhen Liang,Peng Gao
Lead-free halide double perovskites (LFDPs) arouse great interest as environmentally friendly substitutes to the state-of-the-art lead halide perovskites. However, most halide LFDPs feature large bandgaps that afford weak visible-light absorption. Herein, we synthesized and systemically studied the single-crystallographic, physical–chemical, band structural, and electronic properties of a series of multidimensional Au-based lead-free hybrid polymorphs, [(NH3CH3)2(AuI4)(AuI2)], [(NH2CHNH2)(AuI4)(AuI2)], [NH3(CH2)nNH3][(AuI4)2] (n = 2, 3), [NH3(CH2)nNH3][(AuI4)(I3)] (n = 4, 5, 6), and [NH3(CH2)nNH3]2[(AuI4)(AuI2)(I3)2] (n = 7, 8, 9). Among these two-dimensional (2D) perovskite-related and zero-dimensional nonperovskite polymorphs, we found an abnormal variation of structural dimensionality with increasing the size of A-site cations. These polymorphs displayed ultrabroad absorption ranges (200–1300 nm) and tunable low indirect bandgaps (0.93–1.18 eV). Combined single-crystallography and Hall effect measurements demonstrate that the I3– conduces to the formation of 2D perovskite structures related by connecting with the (AuI4)− sheets and also the charge transport properties. Consequently, [NH3(CH2)5NH3][(AuI4)I3] and [NH3(CH2)8NH3]2[(AuI4)(AuI2)(I3)2] showed high spectroscopic limited maximum efficiencies of 28.4 and 20.5%, respectively, with a film thickness of 500 nm. Our findings bring the Au-based polymorphs to the forefront of study on lead-free low-bandgap perovskites for optoelectronics and reveal the unique rule of dimensionality engineering in such materials.
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CARBOHYDRATE POLYMERS
·
2022
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IF 10.723
Miao Li,Dong Chen,Xia Sun,Zesheng Xu,Yutong Yang,Yongming Song,Feng Jiang
The application of flexible multifunctional sensors based on conductive hydrogels in human health detection has been widely studied. Herein, a facile one-pot method is proposed to prepare ionic conductive hydrogels by dissolving polyvinyl alcohol (PVA), cellulose nanofiber (CNF), and aluminum chloride hexahydrate (AlCl 3 ·6H 2 O) in a dimethyl sulfoxide (DMSO)/water binary solvent. The resulting ionically-conductive organohydrogels have high stretchability (up to 696%), fast response (130 ms), wide operating temperature (−50 °C to 50 °C), and long-term stability (30 days). The hydrogel sensor exhibits excellent signal sensing capability (human motion and sound detection signals) and cycling stability (1000 cycles) under extreme temperature and long-term storage conditions. Notably, the organohydrogel displays high sensitivity to both compressive deformation and temperature, resulting in multifunctional sensing performance. This work provides a viable approach for the long-term use of hydrogels as wearable devices in extreme environments and daily life.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Mingming Sun,Wei Guo,Jiesheng Tian,Xin Chen,Qiuyu Zhang
Gold nanoflowers (Au NFs) have received great attention for surface-enhanced Raman scattering (SERS) applications, due to the high surface area, availability of conjugation sites on surface and the localized surface plasmon resonance . However, their further application is much hampered by the complicated and time-consuming synthesis process, which remains better responded. Herein, we propose a novel & straightforward interface-modified reverse microdroplet strategy to configure homogeneously dispersed Au NFs within two hours, where Au 3+ was reduced by excess aniline as two-in-one medium of reductant and solvent. It is demonstrated that the reaction system is robustly directed by the dynamic built-in reaction interface, thanks to the capping effect of the in-situ formed polyaniline (PANI) and polyvinyl pyrrolidone (PVP). It is further identified that the final morphology of Au NFs is strongly determined by the nucleation & growth rates. Consequently, such a well-tailored microstructure endows the Au NFs with sound performance for SERS applications. When using methylene blue (MB) as a molecular probe , a high SERS enhancement factor above 10 5 is delivered. This work provides a feasible interface-assisted methodology to investigate multi-level structures, and sheds light toward simply advancing versatile nanomaterials for broad applications.
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高影响因子
POLYMER COMPOSITES
·
2023
·Vol. 44
·期 11
·7865-7875
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IF 5.2
Xue Jia,Boyu Cui,Shuang Li,Hao Xie,Weihong Wang,Yutong Cui,Jiayan Ding,Xianquan Zhang,Yongming Song
Microcrystalline cellulose (MCC) fibers are co mmonly used to reinforce polymers; however, their freeze-drying process consumes a lot of energy. In this study, MCC dried at different temperatures, oven-dried at 25, 50, 75, and 103°C and freeze-dried, was evaluated based on their effect on the reinforced composites. The dried MCC was compounded with polylactic acid (PLA) by melt extrusion and compressed into an MCC/PLA composite film. The morphology, structure, and crystallinity of the dried MCCs and MCC/PLA composites were analyzed using scanning electron microscopy, laser particle size analysis, x-ray diffraction, mechanical testing, and Fourier transform infrared spectroscopy. It was proved that MCC dried at 103°C was more uniformly dispersed and tightly bound to the PLA matrix than freeze-dried MCC. Tensile measurements showed that the MCC dried at 103°C had nearly the same tensile strength (58.35 MPa) as that of the freeze-dried MCC (58.7 MPa) and was higher than that of the other oven-dried MCC. Energy consumption evaluation revealed that oven-drying consumed much less energy than freeze-drying MCC for 24 h to obtain the same final moisture content. MCC dried at 103°C has significantly better properties than MCC dried at 25, 50, and 75°C, similar to freeze-drying. Concerning performance and energy consumption, drying at 103°C is determined the optimal choice to support the preparation of MCC-reinforced PLA composites. Highlights Drying temperature effects aggregation of MCC. MCC Dried at 103°C can present similar properties to freeze-dried MCC but save more energy. Oven-drying can be a good way to dry MCC for the preparation of MCC/PLA composite.
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Nano Research
·
2023
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IF 9.9
Wu Mengjun,Song Jiangping,Lei Jiaheng,Tang Haolin
Composite polymer electrolytes (CPEs) have attracted much attention for high energy density solid-state lithium-metal batteries owing to their flexibility, low cost, and easy scale-up. However, the unstable Li/CPE interface is always challengeable for the practical utilization of CPEs. Herein, a polymer interlayer containing K + prepared by ultraviolet (UV)-curing precursor solution is coated on Li surface to stabilize the interface between poly(vinylidene difluoride) (PVDF) composite electrolytes and Li anode. Benefiting from the physical barrier of the interlayer, the continuous decomposition of PVDF is restrained and the intimate contact between electrode and electrolyte is also achieved to reduce the interface impedance. Moreover, the added K + is utilized to further regulate smooth Li deposition. As a consequence, the symmetric Li∣Li cell with coated Li demonstrates steady cycling at 0.4 mAh·cm −2 and a high critical current density of 1 mA·cm −2 . The assembled Li∣LiFePO 4 cell presents outstanding cycling stability (capacity retention of 90% after 400 cycles at 1 C) and good rate performance. The associated pouch cell performs impressive flexibility and safety. This work provides a convenient strategy to achieve stable Li/PVDF interface for high-performance PVDF-based solid state Li metal batteries.
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高影响因子
Journal of Physical Chemistry C
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2023
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IF 3.7
Pengfei Jiang,Ji Mi,Chongkun Shao,Yitong Dai,Shu Yan,Yongsheng Guo,Wenjun Fang
In this study, palmitoyl and hindered phenolic hyperbranched polyglycerol (CBHPG), with hyperbranched polyglycerol (HPG) as the structural core and hindered phenol or alkyl chain as the decorated shell, has been strategically designed and synthesized as an efficient integrated additive to enhance the energy efficiency and inhibit the oxidation coking of hydrocarbon fuels. The superior thermal stability and solubility of CBHPG were confirmed by thermal gravimetric analysis and dynamic light scattering. In the presence of CBHPG with high antioxidant activity, the oxidation induction time of n-undecane increased more than 2-fold at 170 °C. In deposition tests, the amphiphilic macromolecule CBHPG showed excellent performance with 58% oxidation coking inhibition rate of Chinese Jet Fuel (RP-3). The Jet Fuel Thermal Oxidation Stability test at 355 °C also exhibited that CBHPG could greatly reduce the deposit of RP-3 by decreasing the deposit rating from >4 to <1. In cracking experiments, the addition of 0.1 wt % CBHPG with sufficient polymerization could increase the conversion of n-undecane by 17.6%, with the corresponding heat sink by 6.1% at 675 °C. The above results indicated that CBHPG could efficiently enhance the performance of hydrocarbon fuels due to multipurposes in antioxidation, coking inhibition, and cracking promotion. CBHPG with a strategically designed structure as an integrated additive shows great promise in improving the energy efficiency and safety in future advanced aircraft.
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CATALYSIS LETTERS
·
2023
·
IF 2.8
Chen Yiming,Hou Zhanggui,Wang Chuan,Ma Xin,Yang Hong,Wang Wen,Zhou Ling,Zhang Yi
As well known, the industrial methanation process needs highly active and stable catalysts obtained from cheap and abundant elements. In this work, we propose a high-loaded Ni/Al 2 O 3 catalyst promoted by manganese. Among them, the 20Ni2Mn/Al 2 O 3 catalyst exhibits the best CO 2 conversion (90.5%) and excellent methanation stability at 250 °C. In addition, the roles of the Mn promoter on CO 2 conversion and selectivity were investigated in detail. The features of natural and promoted catalysts are described through XRD, XRF, BET, TEM, H 2 -TPR, CO 2 -TPD, and operando DRIFTS techniques. Based on various characterization results, the addition of Mn will greatly reduce the Ni particle size and improve the Ni dispersion on the alumina support. Furthermore, compared to the unpromoted catalyst, Mn promoted catalysts show better reducibility and have more medium basic sites. And these medium basic sites are favorable to the adsorption and activation of CO 2 . In-situ DRIFTS experiments for CO 2 methanation reveal that manganese could promote the monodentate carbonate hydrogenated to formate rapidly, which could be faster converted towards CH 4 , contributing to significantly improved activity of the Mn promoted Ni/Al 2 O 3 catalyst. Graphical Abstract
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高影响因子
AICHE JOURNAL
·
2023
·Vol. 69
·期 9
·e18102
·
IF 3.7
Yuhan Wang,Chong Shen,Min Qiu,Minjing Shang,Yuanhai Su
In this work, we first solved the partial differential equation of the one-dimensional axial diffusion model in an open-source platform, that is, FEniCS, to explore the influence of the axial dispersion on the reaction yield-to-time profile. Then, we built an automatic platform, which included a photomicroreactor, a continuously controlled pump, a high-power UV-LED light source, an in-line visible-light absorbance analytical unit, and a Raspberry Pi based controlling unit. Moreover, steady-state feeding and sampling functions could be realized in this continuous-flow photochemical platform. The homogeneous photolysis of methylene blue and the photo-Favorskii rearrangement synthesis of ibuprofen as the model reactions were used to validate the robustness of this automatic platform with unsteady-state and steady-state operations, through which kinetic study was carried out using genetic algorithm based symbolic regression, leading to deep understanding on reaction mechanisms and benefits for process optimization.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
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IF 19.503
Weidong Sun,Guofeng Zhao,Ya Gao,Jiaqi Si,Ye Liu,Yong Lu
Chemical looping concept paves way toward intrinsically safe and efficient oxidative coupling of methane (CL-OCM) process, because it permits the reaction to proceed via repeating reduction-oxidation cycle in two reactors. It is calling for a ground-breaking catalyst with enough high selective CH 4 -converting lattice-oxygen carrying capacity but represents a grand challenge. Herein, we report an efficient catalyst obtainable by decorating an oxygen carrier FeMnO 3 with Na 2 WO 4 , with good cycling performance, achieving a high space time yield of 29.8 g C2-C3 kg cat. −1 h −1 with 20% CH 4 conversion and 80% C 2 -C 3 selectivity at 800 °C and a low catalyst/CH 4 weight ratio of 13.5. CL-OCM process is established by “FeMnO 3 ↔ [MnFe 2 O 4 + MnO]” redox cycle. Na 2 WO 4 -decoration gets lattice oxygen stored in FeMnO 3 transformed from non-selective to selective due to mitigation of lattice-oxygen evolution. Scaled up CL-OCM testing with 10-gram catalyst also yields comparable results seen in the case of using 1-gram catalyst, validating great application potential.
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高影响因子
Journal of Cleaner Production
·
2021
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IF 9.297
Jiubing Zhang,Yuanyuan Ge,Songyuan Xiong,Zhili Li
A new economical, stable, and recyclable amorphous mesoporous geopolymer monolith (GM) was prepared from metakaolin and slag. The obtained GM contained a porous structure mainly with mesopores, and rich Brønsted and Lewis acid sites, which showed higher activity than Ni/MCM-41 and Pt/NiAl 2 O 4 , etc . Over 45 aromatic compounds, including guaiacol, syringol, isovanillin, 3,4-dimethoxybenzyl alcohol, etc ., were found in the bio-oil. Under optimal conditions, the total yield of 10 major monophenols reached 74.69 ± 1.00 mg/g, half of which was 4-ethyl guaiacol (36.77 ± 1.89 mg/g). Moreover, the GM was easy to regenerate and reuse. In three consecutive runs, the catalytic activity of GM was only reduced by 6.69% per cycle. The synergism of Brønsted and Lewis acidic sites and mesopores of GM was responsible for the high catalytic activity. These indicate the GM is low-cost, easy to prepare, environmentally benign, stable, recyclable, and has great potential in depolymerizing lignin into monophenols.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
·
IF 5.2
Gaosheng Li,Yujiao Gao,Chenyu Sun,Fukun Niu,Zhuqun Shi,Quanling Yang,Chuanxi Xiong
Flexible sensors based on biological hydrogels have gained significant attention in the fields of wearable devices , human-computer interaction robots, and medical monitoring. Nanocellulose , a natural polymer material, offers advantages such as low cost, abundant reserves, green environmental protection, and renewability. However, the high water content of the nanocellulose-based flexible sensor limits its application at low temperatures, making it difficult for the nanocellulose-based hydrogel electronic skin to function properly. To enhance the hydrogel's anti-freezing and anti-drying properties, we introduced glycerol (GL) into the in-situ grown polypyrrole (PPy) hydrogel of 2,2,6,6-Tetramethylpiperidine-1-oxyl radical (TEMPO) oxidized cellulose nanofibril (TOCN) and obtained the organic hydrogel TOCN/PPy/GL. The prepared TOCN/PPy/GL organic hydrogel maintains excellent electrical conductivity , mechanical properties , and strain sensing capabilities (strain sensitivity GF=2.41 at −45 ℃, response time 100 ms, recovery time 200 ms). The TOCN/PPy/GL organic hydrogel electronic skin also exhibited exceptional anti-drying property, with a volume retention of 66.75% after 24 h at 100 ℃, which is six times higher than the volume retention of TOCN/PPy hydrogel without GL under the same conditions.
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高影响因子
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