ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2025
·
IF 0
Xu Qian,Zheng Zhihong,Zhang Jingyun,Luo Jinjing,Chen Jianwen,Lai Zheng
A series of manganese-iron-based (MnFeOx) polytetrafluoroethylene (PTFE) catalytic filter materials were prepared by combining acid pretreatment and ultrasound-assisted coupling method to achieve simultaneous treatment of nitrogen oxides and dust. Surface acid pretreatment of the filter materials can improve PTFE’s surface roughness and provide more attachment sites for catalyst loading. The ultrasound-assisted coupling technology significantly improves the loading capacity of the catalyst and the bonding strength with the filter material. Compared to previous catalytic filter materials, the preparation of the optimal catalytic filter material in this study had achieved gratifying catalytic performance (NO conversion of 95% at 200 ℃) and could reach 99.95% filtration performance. In addition, the catalytic filter material also exhibited outstanding catalyst stability and mechanical properties of filter material, which made the catalytic filter material suitable for complicated working conditions. The functional integrated filter material has great significance for the collaborative treatment of multiple pollutants and could significantly benefit future development of air pollution control.
✓ 已验证
产品关联
DOI
PubMed
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Qian Shao-Kang,Lv Hui,Qiao Wen-Huan,Hu Zhen-Yan,Shen Jin-Zhao,Cao Gui-Ping
Tetramethyl bisphenol A (TMBPA) is a crucial industrial precursor synthesized through acid catalysis. Solid acid catalysts are preferred due to their ease of separation and environmental compatibility. However, the limited understanding of their catalytic mechanisms constrains their application. In this study, sulfonic acid (–SO 3 H) and sulfhydryl groups (–SH) were employed to modify MCM-41 mesoporous molecular sieves to prepare solid acid catalysts. The solid acid catalysts were subjected to catalytic experimental evaluation and structural characterization. The results indicate that the dual-functional mesoporous catalysts exhibit exceptional catalytic activity, achieving a yield of 72.4%. A comprehensive catalytic pathway was proposed through theoretical calculations: The sulfonic acid group (–SO 3 H) facilitates the protonation of acetone; the protonated acetone reacts with the sulfhydryl group (–SH) to form an isopropyl cation through dehydration; the isopropyl cation reacts with 2,6-dimethylphenol to form a 4-isopropyl-2,6-dimethylphenol cation; and this cation combines with another 2,6-dimethylphenol, releasing a hydrogen proton to produce TMBPA. The activation mechanism of the intermediate reveals that the sulfonic acid group (–SO 3 H) induces a 0.011 electron transfer in the acetone molecule, thereby activating the molecule. The sulfhydryl group (–SH) activates the protonated acetone by transferring 0.359 electrons to the protonated species. 2,6-dimethylphenol undergoes a 0.183 electron transfer under the influence of the isopropyl cation, including 0.075 electrons at the solid–liquid interface and 0.108 electrons intramolecularly. The elucidation of the molecular-level catalytic pathway and the electronic-level activation mechanism provides a theoretical basis for the design of solid acid catalysts. Graphical abstract
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2022
·Vol. 106
·期 2
·349-359
·
IF 2.606
Song Fan,Yao Xiandong,Wan Cong,Wang Lijun,Xi Shuang
Titanosilicate mesoporous materials (TiSi-MMs) with adjustable textural properties were synthesized by the sol-gel method. Tetraethyl orthosilicate (TEOS) was used as Si source, while tetraethyl orthotitanate (TEOT) or potassium titanium oxide oxalate dihydrate (PTOOD) was used as Ti source. With an increase of Ti content, the specific surface area and pore volume of TiSi-MMs decrease while the pore size increases. The specific surface area, pore volume and average pore diameter of TEOT-derived TiSi-MMs are larger than those of PTOOD-derived TiSi-MMs. In the acetalization reaction of biomass-derived furfural with n -propanol, the conversions of furfural over TEOT-derived TiSi-MMs are higher than that over silicate mesoporous material (Si-MM), demonstrating that the introduction of Ti significantly enhances the catalytic performance. Furthermore, the catalytic performance of TEOT-derived TiSi-MMs is better than that of PTOOD-derived TiSi-MMs. The sample with the largest Ti content and the highest number of strongly acidic sites shows the best catalytic performance. The numbers of strong acidic sites are positively correlated with the Ti contents of TiSi-MMs. Ti content and specific surface area are the two main factors affecting the catalytic performance because they determine the density and intensity of accessible Lewis acidic catalytic sites (coordinatively unsaturated Ti 4+ ) in the catalyst channels, thus determining the catalytic performance in the acetalization reaction. These TiSi-MMs show good catalytic performance and can be used to efficiently catalyze the acetalization reaction of biomass derived furfural and n -propanol.
Graphical abstract
✓ 已验证
DOI
高影响因子
Carbon Letters
·
2020
·Vol. 30
·期 6
·657-665
·
IF 1.992
Li Jiajia,Hu Jiajun,Wang Kai,Xia Hongyan
Effective processing and use of coal slime is of great significance to protect the environment and save resources. Different coal slimes (untreated with 43 wt% ash content, crushed and flotation treated with 10 wt% ash content, and pre-carbonized) were activated with KOH to prepare porous activated carbon. The results show the activated carbon prepared from coal slime with 10 wt% ash had high specific surface area (3037 m 2 /g) and pore volume (1.66 cm 3 /g), which was ascribed to the suitable contents of minerals as template and oxygen-containing functional groups. Electrochemical measurements exhibited the best specific capacitance of 220 F/g at 0.1 A/g and the cycle stability of over 100% capacitance retention after 1000 cycles at 5 A/g in 6 M KOH solution. Due to the high specific surface area, superior electrochemical performance, and facile and low cost, developing highly porous activated carbon for supercapacitors is one alternative way for effective use of coal slime waste.
✓ 已验证
DOI
高影响因子
Collagen and Leather
·
2023
·Vol. 5
·期 1
·1-13
·
IF 0
Chen Zehong,Lai Haihong,Zhuo Hao,Zhong Yu Lin,Zhong Linxin,Peng Xinwen
Renewable and low-cost biomass is an ideal sustainable alternative to petroleum-based resources, but producing biomass-based carbon electrode with high performances remains a challenge. Herein, we propose a facile self-assembly strategy to fabricate a biomass-derived N, S co-doping carbon electrode from lignosulfonate without any activation or template process. Taking advantage of the coordination between Fe ions and lignosulfonate, the resultant carbon exhibits a spherical structure with abundant graphitized nanosheets, leading to a high specific surface area with rational pore structure, which are beneficial to the electron/ion transport and storage. The high contents of doping N (8.47 wt%) and S (2.56 wt%) significantly boost the electrochemical performances. As a supercapacitor electrode, the carbon material displays high specific capacitance of 390 F g −1 , excellent cycling stability and high energy density of 14.7 W h kg −1 at a power density of 450 W kg −1 . This study provides a potential strategy for synthesizing cost-effective heteroatom-doped carbon materials from biomass with abundant functional groups and heteroatom sources, such as chitosan, collagen, and gelatin. Graphical
✓ 已验证
DOI
IONICS
·
2024
·Vol. 30
·期 8
·4479-4486
·
IF 2.4
Tang Anping,Chen Juedong,Xu Guorong,Song Haishen,Wang Jinglun,Chen Hezhang
Non-intercalation cathode materials based on nanocomposites of lithium fluoride and Li-free transition metal compounds have drawn attention as materials for fabricating the cathode of lithium ion batteries owing to their high theoretical specific capacities and high redox voltages. In the present study, a nanocomposite of MnO-LiF was in situ synthesized by a quick annealing at 500 °C for just 5 min using a mixture of ammonium fluoride, manganese acetate, and lithium acetate as precursor. The synthesized composite is investigated by X-ray diffraction, scanning electron microscopy, nitrogen sorption, and charge-discharge measurements. As a lithium-ion battery cathode, it delivers respectively an initial discharge-specific capacity of 170 mAh g −1 and a discharge-specific capacity of 137 mAh g −1 in the 50th cycle at a current rate of C/20, which is equivalent to a moderate capacity retention rate of 80.6%. The novel synthesis approach proposed offers access to electrochemically active composites of lithium fluoride and Li-free transition metal oxides.
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 9
·7164-7171
·
IF 2.22
Wang Chuang,Li Ying,Zhou Faguang,Li Zhuowei,Jiang Jing,Zhu Ge
The discovery of near-ultraviolet-excited orange-emitting phosphors is a major challenge in light-emitting diodes. Benefitting from highly condensed framework and abundant cation sites of β -Ca 3 (PO 4 ) 2 -type compounds, a novel orange emitter, Sr 19 Mg 2 (PO 4 ) 14 :Eu 2+ , has been synthesized and investigated in this study. The structure and coordination environment around each cation were determined by Rietveld refinement for the first time. The optical bandgap was estimated by diffuse reflectance spectrum and the photoluminescence performance was studied systematically. The Sr 19 Mg 2 (PO 4 ) 14 :Eu 2+ phosphor exhibited strong absorption in near-ultraviolet region, and emitted broad-band orange emission from 500 to 750 nm peaked at 620 nm. According to the Rietveld refinement result, photoluminescence and Gaussian fitting spectrum, it could be inferred the emission spectrum of Sr 19 Mg 2 (PO 4 ) 14 :Eu 2+ came from three different Eu 2+ luminescent centers which could be assigned to the different cation site. The different thermal stability of each luminescent center was also investigated and explained by the different Debye temperature (Θ D ) calculated by average atomic displacement parameter; however, its integrated thermal stability still needs to be improved. All the results indicated Sr 19 Mg 2 (PO 4 ) 14 :Eu 2+ may be applied as an alternative orange phosphor in WLEDs.
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2024
·Vol. 33
·期 2
·885-898
·
IF 4.7
Xiao Huan,Zhou Minghao,Sun Fengkun,Song Xincheng,Huang An
Polylactic acid (PLA) is a widely used biodegradable polymer, but its brittleness severely limits its further application. This study explores the preparation of anisotropic polylactic acid/thermoplastic polyurethane (PLA/TPU) foam through melt blending with elastomers, rolling, and supercritical fluid foaming (SCF), which substantially enhances the toughness of PLA. Results indicate that the crystallinity and elongation at break of PLA/TPU blend improve with increasing rolling temperature and rolling rate. Notably, at a rolling temperature and a rolling rate of 50%, the elongation at break for the PLA/TPU blends increases from 4.0 to 59.0%. In addition, SCF processing yields an anisotropic, highly oriented, and elongated cell structure within PLA/TPU foam. This cellular architecture further elevates the elongation at break of the rolled PLA/TPU blend to 76.8% and 1820.0%. This research offers a straightforward, environmentally friendly, and scalable method for fabricating high-strength PLA-based foam materials, equipping them with functionalities such as buffering, sound absorption, shock absorption, heat preservation, etc., which is suitable for electronics, home appliances, sports and other fields.
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 33
·2187
·
IF 2.8
Liao Bo-Kai,Zhou Zong-Yi,Luo Zhi-Gang,Wu De-Quan
In this work, the corrosion behavior of Sn-3.0Ag-0.5Cu (SAC305) tin-based solder alloy at relatively lower temperature is firstly investigated using electrochemical methods. Effects of temperature and sodium chloride (NaCl) concentration on the corrosion behavior are discussed in detail. Results indicate that the anti-corrosion ability decreased when temperature rising at the same NaCl concentration. On the other hand, the corrosion resistance of SAC305 alloy increased with a lager chloride concentration at relatively lower temperatures, whereas the opposite conclusion was reached at high temperatures. X-ray diffraction meter (XRD) and scanning electron micrograph (SEM) studies revealed that at low temperature, chloride ion reacted with SAC305 alloy forming insoluble basic tin chloride with tin alloy, which covered on metal surface and inhibited corrosion process. However, this process is disrupted at relatively higher temperatures due to chloride ions attacked the tin-oxide protective film on the metal surface, further promoting pitting corrosion. Relevant mechanism has been proposed to clarify the roles of temperature and NaCl concentration in the corrosion process for SAC305 alloy in NaCl solution.
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·14478
·
IF 4.259
Wang Jin-Feng,Zhu Lei,Zhao Ben-Guang,Zhao Yu-Long,Song Jian,Gu Xiu-Quan,Qiang Ying-Huai
It is critical to prepare smooth and dense perovskite films for the fabrication of high efficiency perovskite solar cells. However, solution casting process often results in films with pinhole formation and incomplete surface coverage. Herein, we demonstrate a fast and efficient vacuum deposition method to optimize the surface morphology of solution-based perovskite films. The obtained planar devices exhibit an average power conversion efficiency (PCE) of 13.42% with a standard deviation of ±2.15% and best efficiency of 15.57%. Furthermore, the devices also show excellent stability of over 30 days with a slight degradation <9% when stored under ambient conditions. We also investigated the effect of vacuum deposition thickness on the electron transportation and overall performance of the devices. This work provides a versatile approach to prepare high-quality perovskite films and paves a way for high-performance and stable perovskite photovoltaic devices.
✓ 已验证
DOI
高影响因子
Electrocatalysis
·
2019
·Vol. 10
·期 3
·253-261
·
IF 2.311
Pan Yi,Fang Yini,Jin Haonan,Zhang Ming,Wang Lina,Ma Shijie,Zhu Han,Du Mingliang
The development of low-cost, highly active, and robust electrocatalysts for catalyzing the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) holds a pivotal role in electrocatalytic water splitting. Herein, a two-step method was presented to synthesize CoS 2 /CoP heterostructures grown on carbon cloth (CoS 2 /CoP/CC). The precursor Co(OH)F/CC synthesized through the hydrothermal process can be successfully converted into CoS 2 /CoP/CC catalyst via gas-phase phosphorization and sulfurization. The as-obtained CoS 2 /CoP/CC exhibited promising performances for HER and OER with low overpotentials of 90 and 334 mV at a current density of 10 mA cm −2 in 1.0 M KOH, respectively. The improved electrocatalytic performance of the CoS 2 /CoP/CC can be attributed to the strong electron interactions and synergistic efforts between CoS 2 and CoP, abundant active sites of the heterostructures, and enhanced smaller charge-transfer resistance.
✓ 已验证
DOI
高影响因子
IONICS
·
2019
·Vol. 26
·期 4
·1721-1728
·
IF 2.289
Fan Xin-ming,Zhang Xia-hui,Hu Guo-rong,Zhang Bao,He Zhen-jiang,Li Yun-jiao,Zheng Jun-chao
SiO/C is believed to be one of the most promising anode material for lithium-ion batteries due to the low operation potential and superior theoretical capacity. However, the substantial volume change during cycling process limits its further practical application. Herein, we report an affordable and highly effective approach to enhancing the electrochemical performance by adding a small amount of single-walled carbon nanotubes (SWCNT) as conductive additive for SiO/C anodes. An efficient liquid-phase mixing approach is employed to evenly disperse the SWCNT into silicon oxide/graphite composite anode for lithium-ion batteries (LIBs). The electrochemical capability is carried out using pouch full cells with commercial electrode areal loading and mass loading. The addition of SWCNT (0.5%) reduces film resistance and direct current resistance (DCR) for charging. The lithium-ion diffusion coefficient is 6.32 × 10 −15 cm 2 s −1 for SWCNT-added sample, which is an order of magnitude higher than that of the sample without SWCNT (2.33 × 10 −16 cm 2 s −1 ). Furthermore, the battery assembled by the SWCNT-adding electrode shows better rate performance and cycle stability. The charge efficiency improves 1.25 times at 4 C charging, which enables fast charging for LIBs. The cycling results show that SWCNT-adding electrode displays capacity retention of 90.30% after 600 cycles at 1 C. Furthermore, the loading of SiO/C electrode increases from 93.4 to 95.4 wt%, which is beneficial for improvement of energy density. It is worth noting that it suggests a well-designed recipe for the practical application of SWCNT for LIBs.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）