CATALYSIS LETTERS
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2024
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IF 2.3
Xiong Ying,Jia Yushan,Yang Ruixi,Wang Peng,Feng Xiaogeng,Cui Junshuo,Lou Zhenning,Shan Weijun,Yu Haibiao
In this paper, the foam-like multi-stage porous 3wt%Al-KIT-6-4T(WI) catalyst was prepared and employed for efficient catalyzing biomass-derived GVL to butene. It is found that the prepared 3wt%Al-KIT-6-4T(WI) catalyst possess abundant mesoporous and presented the foam-like microstructure. Due to this, the 3wt%Al-KIT-6-4T(WI) catalyst has large specific surface area (517.09 m 2 ·g −1 ) and adequate amount of surface acid sites (both Brønsted and Lewis acid site). The special microstructure further improves the mass transfer efficiency of reactants and products. Under the optimized reaction conditions, the butene yield over the 3wt%Al-KIT-6-4T(WI) catalyst can up to 93.78% at 300 °C, after reacting 240 min. Moreover, the 3wt%Al-KIT-6-4T(WI) catalyst still showed excellent regeneration stability, and above 72% butene yield can be maintained after 7th cycle tests. Graphical Abstract
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高影响因子
CORROSION SCIENCE
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2024
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IF 7.4
Teng Xu,Lei Yu,Ji-Ming Hu
Zn-Al layered double hydroxide (LDH) pretreatment layer was prepared by a novel two-step electrochemical method on galvanized steel surface from a precursor solution containing Al 3+ -only. In the first step, anodic currents are applied to Zn deposit to produce Zn 2+ in solution near the substrate surface. Cathodic currents are then applied to ensure the cathodic deposition of LDH film. The obtained LDH coatings not only provide excellent adhesion to the metal surface, but also enhance the adhesion between metal substrate and the top epoxy coatings. The “LDH/epoxy” painting system can protect galvanized steel from rusting for at least 150 days.
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INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Zhenyu Sun,Jianxiong Lyu,Ping Li,Yiqiang Wu,Xingong Li,Yingfeng Zuo
As green renewable resources, wood and its composites are widely used in the construction field, which puts forward higher requirements for their flame-retardant performance. In this study, a high-temperature hydrothermal crystallization method for in situ constructing an epoxy crosslinked Si–Al zeolite-like structural wood composite (W ZLC ) was reported. Under the action of amine guiding agents and epoxy resin, the zeolite-like catalytic structure constructed in poplar wood comprised negative electrocatalytic sites, which can efficiently catalyze the formation of the carbon layer and endow W ZLC with excellent flame retardant, smoke-suppression, and self-extinguishing properties. Compared with the untreated wood (W N ), the thermal stability of the treated wood (W ZLC ) was greatly improved, and the amount of volatile organic compounds released during the decomposition process was significantly reduced. The heat release rate, total heat release, smoke production rate, and total smoke production of W ZLC1 decreased by 50.23%, 44.14%, 45.21%, and 28.46%, respectively. Particularly, CO and CO 2 yields of W ZLC significantly decreased by 92.26% and 92.02%, respectively, indicating that the Si–Al zeolite-like catalytic structure displayed excellent catalytic flame retardant properties, which can effectively decrease the thermal decomposition rate and combustion risk of the W ZLC . This method uses less flame retardants to achieve a good flame retardant and smoke suppression effect, thereby reducing the risk of environmental pollution caused by too many flame retardants.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2024
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IF 4.2
Jianlin Chen,Zihan Wu,Shu Chen,Wei Zhao,Yu Zhang,Wenxia Ye,Ruoxi Yang,Li Gong,Zhuoyin Peng,Jian Chen
Zinc oxide nanorod arrays (ZnO NRAs) have been previously introduced as electron transport layer (ETL) of perovskite solar cells (PSCs) due to their high electron mobility and unique textured morphology. However, the presence of hydroxyl and oxygen vacancies on the surface of bare intrinsic ZnO NRAs may act as defect centers leading to carrier nonradiative recombination and the device photovoltaic performance degradation. Here, we propose a mutilayer SnO 2 /Al-doped ZnO nanorod arrays/SnO 2 (SnO 2 /AZO NRAs/SnO 2 ) composite to be utilized as ETL of all-inorganic CsPbBr 3 PSCs. The influence of AZO NRAs with various Al ion (Al 3+ ) doping content on the performance of CsPbBr 3 PSCs was explored. The hole-free carbon-based CsPbBr 3 PSCs with an architecture of FTO/SnO 2 /AZO NRAs/SnO 2 /CsPbBr 3 /carbon based on 1 at% AZO NRAs exhibited the best photovoltaic performance with a champion power conversion efficiency (PCE) of 7.11 %, open-circuit voltage ( V oc ) of 1.46 V, short-circuit current density ( J sc ) of 6.88 mA/cm 2 , and fill factor ( FF ) of 71.1 %, compared with the bare intrinsic ZnO-based counterpart with a PCE of 3.45 %, V oc of 0.80 V, J sc of 8.46 mA/cm 2 , and FF of 51 %, respectively. The photovoltaic performance enhancement can be atrributed to enhanced light collection and electron extraction capability, with lower open-circuit voltage loss and more suitable interface band alighment. It is notable that the AZO NRAs were prepared by a facile electrodeposition approach to obtain large-area textured ETLs. This strategy may also be applicable to the photovoltaic performance improvemet of all types of PSCs.
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JOURNAL OF CATALYSIS
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2024
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IF 6.5
Yun Tian,Mengqiao Gao,Zhiyang Tang,Fukun Li,Qiang Zeng,Jinxing Long,Xuehui Li
Conversion of lignin to valuable chemicals without external hydrogen presents a significative but challengeable endeavor. Herein, an efficient approach has been proposed for the lignin hydrogenolysis with in-situ hydrogen in the presence of Ni nanoparticles nested in layered double oxides (LDOs). 84.4 % conversion of lignin was achieved over 30Ni-Mg 3 Al-LDOs, affording a 21.3 % yield of monomers, and 38.0 % of which was identified as 4-ethylphenol. Catalyst characterizations revealed that this excellent performance of lignin conversion should be ascribed to the highly dispersed Ni nanoparticles, strong interfacial interactions between Ni and LDOs, and suitable basicity of catalysts. Furthermore, the roles of the solvent (1,4-dioxane aqueous solution) and the lignin methoxyl groups as hydrogen resources were distinguished, and the former acted as an initial hydrogen to promote lignin depolymerization, and the latter was responsible for the high yield of 4-ethylphenol. In addition, a plausible reaction pathway for lignin hydrogenolysis has been proposed.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2024
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IF 3.8
Ne Ni,Ying Ouyang,Jianqiang Liu,Enhui Xing,Yibin Luo,Xingtian Shu
It was the thermostability and acidity of P precursors that influenced the interaction between P species and framework Al to determine the hydrothermal stability of P modified ZSM-5. With H3PO2 and NH4H2PO2 as P precursors, the P–Al interactions of P modified ZSM-5 samples calcined under different temperatures were systematically investigated by X-ray fluorescence, X-ray photoelectron spectroscopy, 27Al, and 31P MAS NMR spectroscopy, and temperature-programmed desorption of NH3 (NH3-TPD). With H3PO2 as the precursor, lower calcination temperature favored less self-polymerization of P species; however, obvious loss of phosphorus was observed during hydrothermal treatment. Conversely, higher calcination temperature tended to result in excessive interaction between P and framework Al for dealumination. Therefore, moderate interactions between P and framework Al were obtained over H3PO2 modified ZSM-5 calcined at 350 °C, which contributed to weaken the self-polymerization of P species. Compared with H3PO2, neutral NH4H2PO2 generated a relatively weaker P-zeolite interaction, which was less affected by the calcination temperature.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2024
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IF 3.8
Chi Sun,Yudong Xia,Xue Ye,Wenlin Xu,Hui Shi,Xinhua Gao,Jinghao Yu,Lisheng Guo,Jie Li
The direct dimethyl ether (DME) synthesis reaction via CO2 hydrogenation typically requires a bifunctional catalyst that effectively combines a methanol synthesis catalyst with a methanol dehydration catalyst, but the effect of the relationship between the two catalysts on the catalytic performance has not been as well studied. In this study, we developed a CuZnZr/Al–S(10)-PG bifunctional catalyst physically mixed with Al-modified SBA-15 and the traditional CuZnZr catalyst for the hydrogenation of CO2 to DME. A pivotal discovery is that the modulation of interaction intensity between these two constituents significantly influences the electronic configuration of each component. Through X-ray photoelectron spectroscopy characterization and methanol dehydration experiments, it was confirmed that diminishing the synergistic interplay between CuZnZr and Al-modified SBA-15, which regulated the electronic structure of the Cu–Zn interface and enhanced the Cu–Zn interfacial interaction, played a crucial role in enhancing the catalyst’s performance in CO2 hydrogenation to DME. This finding contests established beliefs about the necessity of strong synergistic interactions in such systems and provides new insights for designing rational bifunctional catalysts.
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JOURNAL OF HAZARDOUS MATERIALS
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2017
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IF 6.065
Haijun Chen,Zhe Chen,Guixia Zhao,Zhibin Zhang,Chao Xu,Yunhai Liu,Jing Chen,Li Zhuang,Tasawar Haya,Xiangke Wang
Ca/Al layered double hydroxide decorated carbon nanotube (Ca/Al-LDH@CNTs) composites were fabricated by co-precipitation method and hydrothermal aged treatment. The prepared Ca/Al-LDH@CNTs was characterized by SEM, TEM, EDS, XRD, FT-IR, UV–vis and XPS techniques, and applied to remove U(VI) from aqueous solutions under various environmental conditions (i.e., pH, ionic strength, temperature and contact time). The results indicated that the adsorption of U(VI) on Ca/Al-LDH@CNTs was four times higher than that of U(VI) on bare CNTs. The kinetic investigations reflected the chemisorption of U(VI) on Ca/Al-LDH@CNTs through oxygen-containing functional groups. The adsorption isotherms demonstrated that the adsorption of U(VI) was well fitted by Langmuir model and the maximum adsorption capacity of U(VI) on Ca/Al-LDH@CNTs was calculated to be 382.9 mg g −1 at 289.15 K. The thermodynamic parameters calculated from temperature-dependent isotherms suggested that U(VI) adsorption on Ca/Al-LDH@CNTs were endothermic and spontaneous process. Furthermore, Ca/Al-LDH@CNTs could remove ∼91% of 241 Am(III) at pH = 8.0, which confirmed Ca/Al-LDH@CNTs as a promising material for multiply low level radionuclides’ pollution remediation.
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PubMed
高影响因子
Journal of Environmental Sciences
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2024
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IF 5.9
Kaini Ma,Kai Li,Ping Ning,Jiayu Feng,Jiacheng Bao,Lei Shi,Xiangyu Wang,Xin Sun
This study employed a wet impregnation method to synthesize five types of Cu/HZSM-5 adsorbents with Si/Al ratios of 25, 50, 85, 200, and 300, used for the removal of H 2 S in low-temperature, low-oxygen environments. The impact of different Si/Al ratios on the adsorption oxidative performance of Cu 30 /HZSM-5–85 adsorbents was investigated. According to the performance test results, Cu 30 /HZSM-5–85 exhibited the highest breakthrough capacity, reaching 231.75 mg H 2 S/g sorbent . Cu/HZSM-5 sorbent maintains a strong ability to remove H 2 S even under humid conditions and shows excellent water resistance. XRD , BET, and XPS results revealed that CuO is the primary active species, with Cu 30 /HZSM-5–85 having the largest surface area and highest CuO content, providing more active sites for H 2 S adsorption. H 2 -TPR and O 2 -TPD results confirmed that Cu 30 /HZSM-5–85 sorbent exhibits outstanding redox properties and oxygen storage capacity, contributing to excellent oxygen transferability in the molecular sieve adsorption-oxidation process. With notable characteristics such as a large surface area, high desulfurization efficiency, and water resistance, Cu 30 /HZSM-5–85 sorbents hold significant importance for industrial applications.
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PubMed
高影响因子
ACS Applied Nano Materials
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2024
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IF 5.3
Yapeng Yao,Xiaodong Gou,Wei Liu,Zihang Liang,Jiangbo Zhang,Zhongliang Ma
Integrating energetic materials into microelectromechanical system (MEMS) to enhance their energy output characteristics has shown extensive potential across aerospace, defense, and civilian applications. Within this study, the MEMS compatible Cu/DNBT (DNBT = [5,5′-dinitro-3,3′-bi(1,2,4-triazole)]) and Cu/DNBT@nano-Al energetic films were successfully synthesized on the copper substrate using an electrochemical method and a drip coating method. The scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), differential thermal analyses (DTA), and a pulse laser ignition test were used to analyze the morphology, composition, thermal performance, and ignition properties of the prepared samples. The findings indicate that the prepared Cu/DNBT and Cu/DNBT@nano-Al energetic films exhibit a nanostructure, and their morphology can be effectively regulated via modifications to the deposition voltage, deposition time, and aluminum plating frequency. Furthermore, the energetic properties of Cu/DNBT@nano-Al films can be adjusted after the deposition of nano-Al. Their heat release, flame height and ignition duration can reach up to 1823.1 J·g–1, 13.5 mm, and 400 μs, respectively. These findings suggest that Cu/DNBT@nano-Al energetic films being a prime contender for initiating powders in MEMS pyrotechnics. In summary, this work offers valuable insights into the integration and application of energetic materials in MEMS ignition devices.
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高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
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2010
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IF 4.243
Jingming Gong,Lianyi Wang,Xingju Miao,Lizhi Zhang
We developed a simple strategy for designing a sensitive electrochemical stripping voltammetric sensor for organophosphate pesticides (OPs) based on solid-phase extraction (SPE) using nanosized Pt intercalated Ni/Al layered double hydroxides (labeled as NanoPt-LDHs). By assembling NanoPt with LDHs together, the resulting NanoPt-LDHs are highly efficient to capture OPs. It dramatically facilitates the enrichment of OPs onto their surface and realizes the sensitive stripping voltammetric detection of methyl parathion (MP) as a model of OPs. The stripping analysis shows highly linear over MP concentration ranges of 0.001–0.15 and 0.3–1.0 μg mL − 1 with a detection limit of 0.6 ng mL –1 (S/N = 3). The combination of NanoPt, LDHs, SPE, and square-wave voltammetry (SWV) provides a fast, simple, and sensitive electrochemical method for OPs.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Xinchao Li,Ziyuan Zhou,Kuo Zhao,Jiahui Liu,Zhiqi Liu
Due to the development of new energy vehicle industry, global lithium consumption increases rapidly. Extracting lithium from abundant clay-type lithium ore is an effective strategy to secure a cost-effective lithium supply chain. However, lithium extraction from clay-type lithium ore currently faces with the problems of high solid residue yield and low extraction selectivity for lithium. In addition, the compounds of silicon and alumina in ore processing high economic value are usually ignored. Here, we developed a sustainable process for the comprehensive recovery of Li, Si and Al from clay-type lithium ore by combining NaOH-assisted roasting with sulfuric acid leaching. Firstly, the leaching behavior of lithium under different roasting conditions and acid leaching conditions was systematically investigated. Under the optimal acid leaching condition, the lithium leaching rate reached 96.8%, while the solid residue yield was only 8% based on the raw ore. Taking advantage of the gelling property of Si/Al-containing leaching solution, a lithium-containing solid was obtained by drying and roasting of the gel product. The selective extraction of lithium was easily achieved by washing the solid with water, and the high-value utilization of solid residues in the whole process to prepare nanowires mullite, alumina and corundum was realized. The mechanisms of multi-element recovery elucidated that the formation of nepheline phase during NaOH-assisted roasting promotes the efficient leaching of lithium and reduces the solid residue by acid leaching. After roasting of gel product, Si and Al combined to form mullite, while lithium remained in a free state, allowing further selective lithium elution by water and simultaneous recovery of Si and Al. This work provides fresh perspectives on the sustainable and comprehensive utilization of clay-type lithium ore.
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危险品化学品经营许可证（带存储）