Solar RRL
·
2023
·Vol. 7
·期 9
·2300006
·
IF 7.9
Yue Jian,Tianliang Xie,Litao Han,Lei Cao,Lijing Wang,Wenhui Zhou,Zhengji Zhou,Dongxing Kou,Yuena Meng,Yafang Qi,Shengjie Yuan,Sixin Wu
Thermally evaporated Se, including the molecules of Se 2 , Se 5 , Se 6 , Se 7 , and Se 8 in the vapor at 550–600 °C, is widely used for the selenization of CZTSSe films. However, active small-molecule Se 2 tends to form large clusters of Se atoms at saturation vapor pressure, resulting in the large Se deficiency and poor crystallization of CZTSSe films. To regulate the time for Se to reach saturation vapor pressure and promote the role of active small-molecule Se, the evaporation area of Se is controlled. Then the corresponding grain growth mechanism of CZTSSe films and device efficiency are systematically investigated. The results demonstrate that the appropriate evaporation area of Se can not only optimize the time for Se vapor to reach saturation, promote the rapid reaction crystallization between the precursor films and active Se 2 , but also inhibit the nucleation at the CZTSSe/Mo interface, thus making the CZTSSe films show a perfect top-down grain growth mode. By preliminary optimization, when the evaporation area of Se is 245 mm 2 , a large-grain spanning monolayer CZTSSe thin film is obtained; meanwhile, a device with a high efficiency of 12.39% is achieved. This study provides a new selenization strategy for improving the crystallinity of CZTSSe thin films.
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MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Yatao Pan,Guangjing Hou,Xiaojuan Wang,Xia Ran,Pingan Liu,Lijun Guo
Developing novel inhibitors for the fibrillization of amyloid peptides and understanding the relevant assembly processes are essential for biomedical and biomaterial sciences. Herein, we have synthesized and characterized the nitrogen and fluorine co-doped graphene quantum dots (N, F-GQDs), and investigated their inhibition of the fibrillization of Amyloid-beta peptide (1–42) (Aβ 42 ) by monitoring the assembly morphologies in the Aβ 42 /N, F-GQDs systems. Our results indicate that the N, F-GQDs functionalized with multiple surface groups effectively inhibits the fibrillization of amyloid Aβ 42 . The strong adsorption of Aβ 42 on N, F-GQDs significantly reduces the generation of β-sheet structures and the cytotoxicity of Aβ 42 /N, F-GQDs aggregates. Accordingly, a morphological evolution from the long fibrils of Aβ 42 to the spherical particles and unique closed-loop structures of Aβ 42 /N, F-GQDs have been captured. A possible interpretation for the observed phenomena in the presence of N, F-GQDs has been proposed by combining the different inhibition effects of other GQDs on the fibrillization of Aβ 42 and the results from various control experiments. Moreover, the inhibition activity of N, F-GQDs demonstrates good adaptability to resist the fluctuation of pH value and the interference of divalent metal ions , facilitating their practical applications in the future.
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Journal of Cleaner Production
·
2023
·
IF 11.1
Yi Luo,Leming Ou,Chengzhe Yin
Considering the growing number of spent lithium-ion batteries (LIBs), it is of great interest to recover valuable metals in an environmentally friendly manner, but this remains a challenge. A pretreatment-deep eutectic solvent (DES) tandem recovery process was developed to recycle various metals from spent LIBs selectively. The pre-treatment step allows the recovery of graphite, diaphragm, copper, and aluminum foil. Combined with the leaching separation process based on DES synthesized from betaine hydrochloride (BeCl) and ethylene glycol (EG), it could exploit the difference in transition metal ion coordination, thus selectively leaching and separating cobalt (Co), manganese (Mn), and nickel (Ni) from the cathode material. This method can comprehensively recover electrode materials , thereby solving the problem of environmental pollution and resource wastage of spent LIBs and realizing the sustainability of the new energy industry.
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Chengli Wang,Mengqiang Zhang,Hui Yu,Wenjie Zhang,Ge Shi,Xiaomeng Zhang,Zhe Cui,Peng Fu,Minying Liu,Xiaoguang Qiao,Yanjie He,Xinchang Pang
Although tremendous advancement regarding the highly stable metal halide perovskite nanocrystals (PNCs) has been achieved, previous studies were primarily focused on green light-emitting PNCs (i.e., bromine-based PNCs). The stability of chlorine-based PNCs with a violet or blue emission property was still lagging behind that of their bromine-based counterparts. Herein, a nondemanding and versatile strategy for in situ encapsulating all-inorganic chlorine-based PNCs with multifold exceptionally high stabilities was presented. Well-ordered mesoporous silica enabled the confined growth of PNCs in its pores followed by the porosity sealing by tetramethyl orthosilicate hydrolysis, thereby rendering full encapsulation of chlorine-based PNCs in dense silica that originated from high-temperature calcination. This judiciously designed structure imparted enclosed violet/blue emitting PNCs impart with outstanding long-term stability (>1.5 year) with high photoluminescence quantum yield (i.e., 30.4%) in pure water as the result of complete isolation of PNCs from detrimental stimuli, eventually leading to the application in the white light-emitting diode device.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Shuqian Xie,Jinbing Shu,Hui Huang,Junhong Li,Ruirui Yue,Jingkun Xu
Improving the electrocatalytic performance by modulating the surface and interface electronic structure of noble metals is still a research hotspot in electrocatalysis . Herein, we prepared the heterogeneous catalyst based on the well-dispersed PdCu nanoalloy and the N -doped Ti 3 C 2 T x MXene support (PdCu/N-Ti 3 C 2 T x ) via in situ growth of PdCu nanoparticles on the fantastic N-Ti 3 C 2 T x sheets. By exploring the electrocatalytic properties of ethanol oxidation reaction (EOR), the composition optimized Pd 1 Cu 1 /N-Ti 3 C 2 T x delivers higher mass activity/specific activity/intrinsic activity (2200.7 mA mg Pd -1 /13.1 mA cm −2 /2.2 s −1 ), anti-poisoning ability and stability than those of Pd/N-Ti 3 C 2 T x , Pd 1 Cu 1 /Ti 3 C 2 T x and commercial Pd/C, which can be attributed to the modified surface electronic features of Pd by the participation of Cu atoms and N-Ti 3 C 2 T x MXene , as well as the “metal-carrier” effect between the PdCu nanoalloy and N-Ti 3 C 2 T x heterogeneous interface. Furthermore, the conductivity of N-Ti 3 C 2 T x MXene can be improved by N -doping, and the abundant terminal groups (-O, –OH, -F and N) on the N-Ti 3 C 2 T x surface can promote the electron exchange between PdCu and N-Ti 3 C 2 T x . This work provides an effective strategy for engineering heterogeneous electrocatalysts for enhanced electrocatalytic EOR by adjusting the interfacial electronic structure of noble metals.
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Science China-Chemistry
·
2023
·Vol. 66
·期 5
·1406-1416
·
IF 9.6
Guo Xiuli,Li Chunguang,Wang Xiyang,Li Zhenhua,Zeng Hui,Hou Pan,Xie Minggang,Li Yuxin,Shi Zhan,Feng Shouhua
Manganese-based cathode materials are promising candidates for aqueous zinc ion batteries (AZIBs) by reason of their low cost and high energy density. However, their practical applicability is hampered by the intrinsic defects of poor electrical conductivity, sluggish reaction kinetics, and severe structural deterioration. Herein, we constructed a hierarchically porous structure composed of carbon-encapsulated MnO nanoparticles (MOC) and three-dimensional (3D) nitrogen-doped graphene aerogel (NGA) (denoted as MOC@NGA). The hybrid was synthesized by a facile in-situ coprecipitation and annealing of manganese-based metal-organic framework (Mn-MOF74) and NGA composite (Mn-MOF74@NGA). Specifically, the carbon shells inherited from organic ligand of Mn-MOF74 could restrain the volume changes of MnO, and the porous NGA prevented the agglomeration of MOC nanoparticles and enriched the types of interfacial chemical bonds. Profiting from the synergistic effect of rich interface chemical bonds and dual-carbon protection, the MOC@NGA hybrids exhibit fast interfacial electron/charge transfer and transport, and outstanding structural stability. Therefore, MOC@NGA cathode delivers an excellent rate performance (270 and 99.8 mAh g −1 at 0.1 and 2.0 A g −1 ) and maintains an excellent specific capacity of 151.6 mAh g −1 after 2,000 cycles at 1.0 A g −1 . Moreover, the fabricated MOC@NGA-based quasi-solid-state battery not only achieves outstanding flexibility but also displays impressive cycling stability, demonstrating a promising potential for portable and flexible equipment. This work provides a feasible strategy for the fabrication of the bridging structure of manganese-based oxides and porous carbon matrix for high-specific capacity and durable AZIBs cathodes.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Zhufeng Hu,Yuchen Tong,Min Wang,Junbo Xu,Chao Yang
A rapid and low-cost carbon/carbon (C/C) composites preparation method is proposed: graphite prepreg-coated carbon fiber fabric (CFF) is formed by hot pressing, followed by hot isostatic pressing and high temperature graphitization, to prepare C/C composite with low porosity and high crystallinity. In this method, the carbon fiber (CF) mass fraction can be precisely regulated in the range of 40–95% by the impregnation process conditions of CFF in graphite prepreg . The graphite particles in the preform were graphitized and bonded with CFF by high temperature graphitization. Finally, a ZrO 2 anti-ablative layer was applied using sol-gel method. The results show that when the CF mass fraction is 50%, the C/C composite with a crystallinity of 92.21 and a porosity of 3.47% can be obtained, with mass ablation rate of 0.23 mg/s and density of 1.62 g/m 3 . The method can prepare C/C composites with uniform density and high ablation resistance.
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ACS Omega
·
2023
·
IF 4.1
Huijin Li,Shuang Ding,Jie Yuan
Current research focuses on extracting humic acid (HA) compounds from low-rank coals to obtain high value-added products. In this study, HAs with high purity and low heavy metal content were obtained from lignite by combining acid pretreatment with hydrothermal treatment. Scanning electron microscopy, elemental analysis (EA), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction, and inductively coupled plasma optical emission spectrometry (ICP–OES) were used to analyze raw lignite and HAs. The effects of acid and hydrothermal treatments on the inorganic elements, functional groups, and yield of HAs were examined. The results showed that acid treatment reduced the ash content of lignite from 20 to 9%, and hydrothermal treatment increased the yield of HAs from 36 to 68%. The chemical properties of HAs exhibited an increase in molecular weight and improved aromaticity after acid and hydrothermal treatments. The results of ICP–OES analysis suggested that the combined method of acid and hydrothermal treatments resulted in a significant reduction of heavy metal elements in HAs. FTIR analysis confirmed the results and demonstrated that the extracted HA from nitric acid pretreated and hydrothermal generation of lignite PHA was rich in carboxyl and phenolic functional groups. PHA was applied to biochar as an activator for the adsorption of heavy metal ions. The experimental results showed that PHA was successfully loaded onto biochar and introduced a large number of functional groups, and the adsorption capacity of the modified biochar for Pb2+ was effectively improved.
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JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2023
·
IF 4.3
Hyok-Chol Ri,Chol-San Jon,Liu Lu,Xiangfan Piao,Donghao Li
For the isolation of flavonoids , a novel magnetic and efficient boronic acid (BA)-functionalized iron oxide particle was prepared and applied to a dynamic electromagnetic-field-assisted solid-phase extraction (DeMF-SPE) device. With the help of the dynamic electromagnetic field , it is possible to form a microcolumn with dynamic dispersion of boronic acid-modified magnetic sorbents . As the sample passes through the extraction region, the magnetic sorbent in its dynamic motion enables high-efficiency extraction through active and countless contacts with the target. Meanwhile, five flavonoids (quercetin (Qu), wogonoside (Wo), isoquercetin (Is), daidzin (Da), and baicalein (Ba)) were selected to investigate the selective entrapment of boronic acid modified magnetic particles during the DeMF-SPE process. Several parameters affecting adsorption and desorption conditions were investigated and optimized. Under optimal conditions, the DeMF-SPE–HPLC–MS/MS approach has a wide linear dynamic range and good linearity ( R 2 > 0.99), low detection limits (0.16–1.25 μg L –1 ), and satisfactory recovery (94.9–106.2%). The analytical method was applied to real samples and showed satisfactory adaptability. Therefore, dynamic electromagnetic field-assisted solid-phase extraction (DeMF-SPE) using the prepared magnetic particles can be considered an efficient and rapid analytical method for extracting flavonoids from onion samples.
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ACS Nano
·
2023
·
IF 17.1
Siqi Gong,Huibin Liu,Fan Zhao,Yaning Zhang,Huiting Xu,Meng Li,Junjie Qi,Honghai Wang,Chunli Li,Wenchao Peng,Xiaobin Fan,Jiapeng Liu
Capacitive deionization has been considered as a promising solution to the challenge of freshwater shortage due to its high efficiency, low environmental footprint, and low energy consumption. However, developing advanced electrode materials to improve capacitive deionization performance remains a challenge. Herein, the hierarchical bismuthene nanosheets (Bi-ene NSs)@MXene heterostructure was successfully prepared by combining the Lewis acidic molten salt etching and the galvanic replacement reaction, which achieves the effective utilization of the molten salt etching byproducts (residual copper). The vertically aligned bismuthene nanosheets array evenly in situ grown on the surface of MXene, which not only facilitate ion and electron transport as well as offer abundant active sites but also provide strong interfacial interaction between bismuthene and MXene. Benefiting from the above advantages, the Bi-ene NSs@MXene heterostructure as a promising capacitive deionization electrode material exhibits high desalination capacity (88.2 mg/g at 1.2 V), fast desalination rate, and good long-term cycling performance. Moreover, the mechanisms involved were elaborated by systematical characterizations and density functional theory calculations. This work provides inspirations for the preparation of MXene-based heterostructures and their application for capacitive deionization.
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ChemistrySelect
·
2023
·Vol. 8
·期 9
·e202203501
·
IF 2.1
Br. Yundi Zhang,Mingyu Cui,Yidong Zhang,Wei Xu,Min Wang,Rong Shao,Jianfei Ding
Graphical The PMD conversion, TBPM selectivity, yield and the catalytic stability were obviously improved on the nanocrystalline HZSM-5 (Z-1) prepared by supercritical hydrothermal synthesis, because it had more amount of framework tetrahedral Al species and the total acidity, higher surface area and pore volume than those of HZSM-5 (Z-2) prepared by conventional hydrothermal synthesis. The nanocrystalline HZSM-5 was synthesized by supercritical hydrothermal synthesis for the first time and investigated in catalytic esterification of pyromellitic dianhydride(PMD)and n-butanol to tetrabutyl pyromellitate(TBPM). The HZSM-5 prepared by conventional hydrothermal synthesis was also examined for comparison. The catalysts were studied using XRD, N 2 adsorption, NH 3 -TPD, Pyridine-adsorption FT-IR, SEM, [27] Al MAS NMRandCHNS analysis. According to the results of characterization, the supercritical hydrothermal condition was helpful to reduce the size of crystal particles and improve the crystallinity of HZSM-5, and shorten the crystallization time. The surface area, especially external surface area, and pore volume were increased, and the total acidity was increased. The strong acid sites were transformed into the weak acid sites, and the strength of weak and strong acid was weakened. The amount of framework tetrahedral Al species and Brönsted acid sites were increased. Therefore, the formation of coke was retarded, and thePMD conversion, the TBPM selectivity and the catalytic stability were obviously improved.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Penglu Yu,Linan Feng,Wenxin Tang,Chan Liu,Jin-le Lan,Yuan-Hua Lin,Xiaoping Yang
As for the self-supporting composite films, it is significant to develop a structural design that allows for excellent flexibility while reducing the negative effect on thermoelectric (TE) properties. Herein, a robust, flexible TE film was fabricated by in situ chemical transformation and vacuum-assisted filtration without any organic solvents involved. The performance of the films was further optimized by adjusting the Ag/Te ratio and post-treatment methods. Owing to the semi-interpenetrating nanonetwork structure formed by AgxTe nanowires and bacterial cellulose, the obtained TE film displayed a high tensile strength of ∼78.4 MPa and a high power factor of 48.9 μW m–1 K–2 at room temperature. A slight electrical conductivity decrement of the TE film in flexible test (∼2% after 1000 bending cycles) indicates an excellent flexibility. Finally, a TE bracelet was assembled to harvest body heat energy, and a steady current of ∼2.7 μA was generated when worn on the wrist indoors. This work provides a reference for the structural design and practical application of flexible TE films.
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