PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Zhihui Dong,Nan Qu,Qiushi Jiang,Zhaolian Han,Lianzhi Sun,Tong Zhang,Dong Liang,Yiran Shi,Zhiqiang Cheng
Due to the high cost, incomplete degradation, and limited raw material sources of traditional slow-release fertilizers, the development of environmentally friendly slow-release urea based on waste filter aids is of great significance in modern agriculture. In this study, beer diatomite filter aid waste-based superabsorbent resin (BDWSA) 1 was synthesized by free radical grafting copolymerization through microwave radiation heating with beer diatomite filter aid waste (BDW), acrylic acid (AA), N , N -methylenebisacrylamide (MBA), and potassium persulfate (KPS). Then, BDWSA was used as the outer coating material, along with ethyl cellulose (EC) and Kaolin as the inner coating, urea and Phellinus igniarius biochar as the fertilizer core, to form a multifunctional eco-friendly double-coated slow-release urea (DSRU) for water-retaining and slow-release functionalities. The performance of slow release behavior of nitrogen was investigated, and showed that urea in soil released 86.02 % of nitrogen during 3 days, monolayer-coated slow-release urea (MSRU) released 94.02 % of nitrogen in 30 days, and DSRU released a total of 74.66 % of nitrogen in 30 days, indicating that DSRU can improve fertilizer utilization by delaying nutrient release. The biodegradation experiment showed that DSRU degraded 86.65 % wt% in 90 days, not only indicating a good biodegradation effect but also beneficial to the growth of soybeans under drought conditions in growth experiments. Therefore, the eco-friendly DSRU product with excellent slow-release capacity has broad application prospects in agriculture.
研究领域:
农业科学
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环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2023
·
IF 7.5
Ke Li,Mengxia Yan,Haili Wang,Lifen Cai,Ping Wang,Huimin Chen
As a typical high-efficient alkane aromatization catalyst, Pt/KL is prone to deactivation due to the sintering growth of Pt on the outer surface of KL and the channel blockage caused by carbon deposition , which is further exacerbated by the one-dimensional channel structure of KL. Therefore, a series of encapsulated catalysts combining the three-dimensional channel structure advantages of S-1 with the role of potassium are prepared and evaluated. It is shown that the encapsulated catalyst KPt@S-1-02 modified by moderate potassium exhibits extremely superior stability and no significant deactivation is observable after n-heptane aromatization for 180 h under harsh conditions. On the one hand, encapsulation structure enables a strong anti-agglomeration ability of Pt and the topological structure of S-1 endows the encapsulation catalysts less susceptible to channel blockage, which has been demonstrated by HAADF-STEM and N 2 -adsorption. On the other hand, characterizations involving NH 3 -TPD, CO-DRIFT and HAADF-STEM verify that the modification by an appropriate amount of K can inhibit acid sites of catalysts and improve Pt dispersion and electron density, thus enhance the stability of catalysts. However, excessive K can serve as weak acid sites, poison of active sites and inhibitor of H 2 adsorption on Pt surface, leading to deactivation of the catalyst.
研究领域:
催化化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 12
·1678
·
IF 4.7
Yueyue Wang,Pu Ma,Jun Huang,Lifang Guo,Yu Wang,Huamin Zhai,Hao Ren
As increasing fiber hydrophobicity can significantly improve the paper dewatering process, we found that replacing SBKP and HBKP with 0.5% superhydrophobic CPGMA can significantly improve the dewatering of paper sheets. Therefore, it can be concluded that if CPGMA has little effect on paper properties, it will have potential industrial value in the papermaking industry. Consequently, it is necessary to further study the effect of the CPGMAs@CPAM/SiO2/APAM system on paper properties. To evaluate the application potential of the system in the papermaking industry, we investigated the effects of CPGMAs, which replaced the fibers in the stocks, on the paper properties in the CPAM/SiO2/APAM system. The findings demonstrate that as the CPGMA replacement increased, the paper’s tensile strength, bursting strength, tear resistance, and folding endurance all declined. The trend can be segmented into two phases: a rapid decrease for substitution amounts below 0.5% and a gradual decline for substitution amounts exceeding 0.5%. When replaced with a small amount of CPGMAs, there was a negligible effect on these properties. Second, the paper air permeability increased with the CPGMA substitution amount in the stock. Furthermore, the trend of paper air permeability can be divided into two stages—a rapid stage with a substitution amount of <0.5% and a slow stage with a substitution amount of >0.5%. A small amount of CPGMAs could distinctly improve the paper’s air permeability. Third, CPGMAs, which replaced fibers in the stock, minutely affected the paper formation. A small amount of CPGMAs substantially boosted the efficacy of the process of paper manufacture and certain characteristics of the paper, and it had a negligible impact on the strength of paper. The CPGMAs@CPAM/SiO2/APAM technology has the potential to improve the retention and filtration performance of CPAM/SiO2/APAM.
研究领域:
材料科学
·
造纸工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yan Liang,Yongqing Wang,Junjie Qian,Li Liu,Yulong Yang,Mingmin Bai,Haotian Zheng
Silicon carbide (SiC) ceramic membrane supports, as critical components of ceramic membrane filters, must exhibit outstanding performance in mechanical properties, porosity, and chemical stability. In this study, MoO₃ was employed as a sintering aid, with SiC and α-Al₂O₃ serving as raw materials and walnut shell powder as a pore-forming agent. The effects of varying sintering temperatures (1250–1400°C) and MoO₃ contents on the properties of SiC porous ceramic membrane supports were systematically investigated. Special emphasis was placed on elucidating the mechanisms by which MoO₃ addition influences porosity, flexural strength, pore size distribution, and chemical stability. Experimental results demonstrate that the introduction of MoO₃ facilitates low-temperature sintering of SiC supports through a dissolution-precipitation mechanism. This process promotes the formation of mullite whiskers that reinforce interparticle necking regions while enhancing the uniformity of neck connections. Optimal performance was achieved at 1350°C with 8 wt% MoO₃ addition, yielding a bending strength of 37.01 ± 1.72 MPa, average pore size of 1.735 μm, most probable pore size of 1.7 μm, open porosity of 39.12 %, and exceptional corrosion resistance. This work establishes both theoretical foundations and practical strategies for low-temperature fabrication of high-performance SiC porous ceramics, while expanding the application potential of molybdenum-based sintering aids in structure-function integrated ceramic materials.
研究领域:
材料科学
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陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 63
·58020-58027
·
IF 3.289
Taiheng Wu,Qian Shao,Shengsong Ge,Liwei Bao,Qingyun Liu
Novel composites based on magnetic zirconia was synthesized with the aid of carboxymethyl chitosan (Fe3O4/ZrO2–CMCS) by a facile method. The as-synthesized products were characterized by wide-angle powder X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR). The magnetic zirconia carboxymethyl chitosan (Fe3O4/ZrO2–CMCS) composites consisted of particles which show a better regularity and uniform with 200–300 nm in diameter. The as-obtained Fe3O4/ZrO2–CMCS nanocomposites exhibited high adsorption activity and the adsorption capacity for sunset yellow was up to 143.2 mg g−1 without adjusting pH of the solution. Interestingly, after the carboxymethyl chitosan being eliminated by calcining in air, the as-obtained Fe3O4/ZrO2 showed enhanced photocatalytic activity under sunlight irradiation. The degradation rate of rhodamine B as well as sunset yellow was 89% and 84% in 240 min, respectively, due to the addition of the Fe3O4/ZrO2 photocatalyst under sunlight irradiation. Both Fe3O4/ZrO2–CMCS and Fe3O4/ZrO2 can be recycled and reused easily, due to magnetism of iron oxide in the composites. Considering the high adsorption performance of Fe3O4/ZrO2–CMCS and the enhanced photocatalytic activity of Fe3O4/ZrO2 for dye stuff, these two nanocomposites can be applied in treating the waste water contaminated by organic dye stuff.
研究领域:
材料科学
·
环境工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Qi Song,Zhao-Hui Zhang,Zheng-Yang Hu,Shi-Pan Yin,Hao Wang,Zhen-Wu Ma
B 4 C ceramics were fabricated by spark plasma sintering with 5% (Ti 3 SiC 2 +Si) as sintering aid. The effects of sintering temperatures and sintering aid on microstructures and properties of B 4 C ceramics were investigated. The results indicated that the addition of a small amount of (Ti 3 SiC 2 +Si) could effectively improve the sintering characteristic of B 4 C ceramics and reduce the sintering temperature. The as-sintered ceramics fabricated at 1700 °C exhibited excellent mechanical properties , including a super-high Vickers hardness of 38.4 GPa, a high flexural strength of 457.6 MPa and a good fracture toughness of 5.61 MPa m 0.5 . Following reasons may be responsible for the improvement of the hardness of B 4 C ceramics: high relative density due to the combination use of (Ti 3 SiC 2 +Si) sintering aids and SPS technology, fine-grained structure of the B 4 C ceramics benefited from the low sintering temperature, formation of the second phases TiB 2 and SiC by chemical reaction and existence of the nano-sized unit of (TiB 2 +SiC) in B 4 C grains.
研究领域:
材料科学
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陶瓷工程
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Misganaw Alemu Zeleke,Dong-Hau Kuo
The quaternary chalcogenide Cu 2 Zn(Sn 1-x Ge x )(S,Se) 4 bulks, where x is G e / [ G e + S n ] molar ratios of 0, 0.15, 0.30, and 0.45 were synthesized via reactive liquid phase sintering at 600 °C for 30 min in the tube furnace and characterized systematically. Together with Sb 2 S 3 as a reactive liquid phase sintering aid, the effects of Ge incorporation on densification, grain boundary, crystal phase purity, crystalline size, and electrical properties were studied. The morphology of the resulted Cu 2 Zn(Sn 1-x Ge x )(S,Se) 4 bulk was found to be more densified and compacted at G e / [ G e + S n ] molar ratio of 0.15 compared to the rests. The X-ray diffraction peaks were shifted towards a higher angle as Ge fraction was increased. The hole concentrations for the entirely p-type bulks were determined to be 3.67 × 10 18 , 1.40 × 10 18 , 1.28 × 10 18 , and 8.90 × 10 17 cm −3 at G e / [ G e + S n ] molar ratios of 0, 0.15, 0.30, and 0.45, respectively. The effects on conductivity and mobility were consistent with their interrelations. Hence, the synthesis and study of Ge incorporated Cu 2 ZnSn(S,Se) 4 bulk using powder technique allows identifying the composition which is expectedly more important for the fabrication of thin film solar cells.
研究领域:
材料科学
·
太阳能电池技术
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 40
·19161-19167
·
IF 3.925
Peng Miao,Weixing Chen,Kailei Li,Weifeng Zhao,Jie Kong
Design of microwave absorbents with hierarchical interfacial structures has become an effective method to scatter microwaves. Metal/carbon composites derived from metal–organic frameworks (MOFs) have attracted considerable attention due to their tunable chemical composition and microstructure. We describe the facile synthesis of a Co/CoO/FeO/C nanocomplex employing Co(OH)2 on NH2-MIL-88B as the “sacrificial template” through one-step pyrolysis. The as-prepared flaky-like Co/CoO/FeO/C nanocomplex showed an effective absorption width of 4.7 GHz at 1.86 mm and a minimum reflection loss of −45.5 dB at 2.01 mm. Our study can aid design of a microstructural strategy for preparing high-performance microwave absorbents.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2019
·
IF 3.372
Chuan Wang,Qingqing Yang,Jieyu Wang,Jun Zhao,Xiaoyue Wan,Zhen Guo,Yanhui Yang
In recent years, machine learning (ML) has been extensively attempted on all sections in development of functional materials such as material discovery, determination of experimental factors for the discovered materials, and tuning experimental factors to produce the selected materials. Design of experiment (DoE) and response surface methodology (RSM) are efficient strategies to screen experimental factors and study the correlation between material property and experimental factors. Usually, second order quadratic model is applied to construct the response surface. ML-based models, such as Gaussian process and neural networks, have also be implemented into the RSM. In this work, a ML model based on support vector machine (SVM) was built to analyze the high-throughput experimental data from DoE. Silica xerogel was chosen as a model material, the goal was to control the diversity of the silanol groups on the surfaces of silica. Silica samples were prepared following the central composite design (CCD) in a segmented continuous flow reactor. Sodium silicate and CO 2 were used as the raw materials. Both quadratic model and SVM model were studied on the analysis of experimental data. SVM model showed better performance in fitting and predicting, which was attributed to the advantage of handling complex nonlinear correlations. Based on the response surface generated by the SVM model, correlations between experimental factors and diversity of silanol groups were identified. With the guidance of the SVM model, two samples with desired silica surface properties were prepared and attempted as supporting material s for heterogeneous catalysis. The impact of surface silanol groups on the catalytic performance was discussed.
研究领域:
材料科学
·
化学工程
·
催化科学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 43
·期 4
·1851-1856
·
IF 3.201
Aifeng Jiang,Fang Wang,Debin Xia,Mengru Li,Liangsheng Qiang,Zhaoyang Zhu,Ping Wang,Ruiqing Fan,Kaifeng Lin,Yulin Yang
Aluminum nanoparticles are widely employed in many fields. However, methods for producing aluminum nanoparticles on a large scale are limited. In this work, we introduce a facile method for manufacturing nanosized aluminum powders on a hundred-gram scale. The key reagents used are ammonium chloride and aluminum(III) acetylacetonate, employed as a grinding aid and surface passivation agent, respectively. The obtained aluminum nanoparticles present excellent stability and are fully characterized by thermogravimetric analysis, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and nitrogen adsorption–desorption isotherms. Well-formed aluminum nanoparticles with average particle sizes of approximately 30 nm and high specific surface areas of over 30 m2 g−1 can be obtained using the optimal ball-milling reaction time. In this case, the initiation temperature of oxidation was observed at approx. 150 °C and the weight increased by approx. 39% when heated under an air atmosphere. Furthermore, these aluminum nanoparticles achieved quick combustion and a flame temperature of over 1100 °C, which have not been observed using micron aluminum powders. This work provides a facile method for the industrial manufacture of high-quality nanosized aluminum powders.
研究领域:
材料科学
·
纳米技术
·
化学工程
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2018
·
IF 4.427
Yuanxia Luo,Baoyu Gao,Qinyan Yue,Ruihua Li
Humic acid (HA) influences the aggregation and stability of nanoparticles (NPs), which determine the removal performance of NPs in coagulation. Consequently, in this study, the impact of HA concentration on the simultaneous removal of CuO NPs, Cu 2+ , and natural organic matter (NOM) was investigated. Enteromorpha polysaccharides (Ep), as the novel recycling coagulant aid, were integrated with polyaluminum chloride (PAC) to treat composite contaminants in this coagulation process. Removal performance, floc properties, zeta potential , scanning electron microscope (SEM) images, and Fourier Transform Infrared Spectra (FT-IR) were measured and analyzed. Results showed that PAC with Ep (PAC-Ep) was more beneficial for improving removal performances than PAC alone. Further, the coagulation performance became better with the increase in HA concentration. When the HA concentration was 10 mg/L (used PAC-Ep), the removal efficiencies of CuO NPs and Cu 2+ were both more than 80%; and in particular, the highest removal efficiency of turbidity was 98%. However, excessive HA (more than 10 mg/L) reduced the removal efficiency of Cu by more than 31%. Smaller and denser flocs with better recoverability were formed as the HA concentration increased. Furthermore, because of affluent functional groups, HA was easily adsorbed on the surface of NPs and combined with dissociative Cu 2+ , thereby forming a composite contaminant. During the coagulation process, the colloidal system was destabilized preferentially by the charge neutralization between composite contaminants and PAC. Furthermore, a chelated reticular structure was formed by the conjunction of carboxyl and hydroxyl groups (from Ep) and Al (III) species (from PAC). Flocs were further enlarged and precipitated by bridging and sweeping of this structure.
研究领域:
环境科学
·
水处理
·
纳米技术
·
化学工程
✓ 已验证
DOI
高影响因子
ELECTROANALYSIS
·
2018
·Vol. 30
·期 5
·842-851
·
IF 2.851
Meiling Wang,Mingzhu Cui,Weifeng Liu,Xuguang Liu,Bingshe Xu
Here, a facile reduction approach for synthesis of β-cyclodextrin functionalized reduced graphite oxide with the aid of ionic liquid (βCD/IRGO) was reported. This strategy relies on the simple mixing of pre-pared aqueous βCD/GO with ionic liquid (IL) at high temperatures, which can bring about a well dispersed βCD/RGO in the utilized IL (βCD/IRGO) with a synchronous evaporation of water. The as-prepared βCD/IRGO product can be stably re-dispersed in water (up to 1.0 mg/mL) after washed and dried. And the presented βCD/IRGO composites possess high supramolecular recognition capability and good conductivity for realizing enhanced electrochemical response towards simultaneous detection of guanine and adenine compared with other βCD/carbon (RGO or carbon nanotube) based composites. In the presence of one of analysts, the linear response ranges is 0.03–10.0 μM for guanine and 0.02–7.0 μM for adenine, respectively, with detection limit of 0.01 μM for both guanine and adenine (S/N=3). This ease of making the βCD/IRGO composite will open up possibilities of its diversifier applications.
研究领域:
材料科学
·
电化学分析
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）