MOLECULES
·
2025
·Vol. 30
·期 15
·3171
·
IF 4.6
Hongmei Wang,Xiaoxu Zhang,Ziqi Shen,Zichuan Ma
The recovery and abatement of volatile organic compounds (VOCs) have received increasing attention due to their significant environmental and health impacts. Supported sulfonic acid materials have shown great potential in converting aromatic VOCs into their non-volatile derivatives through reactive adsorption. However, the anchoring state of sulfonic acid groups, which is closely related to the properties of the support, greatly affects their performance. In this study, two supported sulfonic acid materials, SZO and SMO, were prepared by treating ZrO2and MgO with chlorosulfonic acid, respectively, to investigate the influence of the support properties on the anchoring state of sulfonic acid groups and their reactive adsorption performance foro-xylene. The supports, adsorbents, and adsorption products were extensively characterized, and the reactivity of SZO and SMO towardso-xylene was systematically compared. The results showed that sulfonic acid groups are anchored on the ZrO2surface through covalent bonding, forming positively charged sulfonic acid sites ([O1.5Zr-O]δ−-SO3Hδ+) with a loading of 3.6 mmol/g. As a result, SZO exhibited excellent removal efficiency (≥91.3%) and high breakthrough adsorption capacity (ranging from 38.59 to 82.07 mg/g) foro-xylene in the temperature range of 130 –150 °C. In contrast, sulfonic acid groups are anchored on the MgO surface via ion-paired bonding, leading to the formation of negatively charged sulfonic acid sites ([O0.5Mg]+:OSO3H−), which prevents their participation in the electrophilic sulfonation reaction witho-xylene molecules. This work provides new insights into tuning and enhancing the performance of supported sulfonic acid materials for the resource-oriented treatment of aromatic VOCs.
研究领域:
环境科学
·
材料化学
·
化学工程
·
表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yi-Ning He,Ren-Zhong Zhang,Jia-Min Wu,Ze-Yu Deng,Ze-Yuan Li,Jia-Xin Zheng,Lin Guo,Zhi-Xiang Cai,Yu-sheng Shi
SiO 2 -based ceramics are an ideal material for manufacturing radomes due to their thermal stability, high dielectric properties, and simple processing techniques. However, traditional manufacturing methods heavily rely on molds, making it difficult to form complex SiO 2 -based ceramic structures. Digital Light Processing (DLP) technology was applied to fabricate SiO 2 -based ceramics doped with Al 2 O 3 -MgO in this work. The influence of the Al 2 O 3 -MgO content on the SiO 2 -based ceramics was systematically investigated. Increasing Al 2 O 3 -MgO content causes a shrinkage to first decrease then increase, contrasting with the flexural strength's initial increase and subsequent decrease. The main reason is magnesium-aluminum spinel (MgAl 2 O 4 ) generated during the sintering process and thus retards crack propagation, promoting a transition in fracture mode. During the fracture stage, the fracture mode of samples with 10.0 wt% Al 2 O 3 -MgO is mainly transgranular fracture, instead of intergranular. This transition in fracture mode enhanced the flexural strength. Meanwhile, as the Al 2 O 3 -MgO content continues to increase, excessive spinel causes agglomeration within the ceramic microstructure. When the Al 2 O 3 -MgO content reached 10.0 wt%, the shrinkage decreases to a minimum of 3.32 %, and the flexural strength increases to a maximum of 15.94 MPa, making it suitable for manufacturing ceramic radomes. The research results provide a new solution for manufacturing SiO 2 -based ceramic radomes by DLP.
研究领域:
陶瓷材料
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增材制造
·
材料科学
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材料电学性能
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微观结构调控
✓ 已验证
产品关联
DOI
高影响因子
Environmental Science-Nano
·
2021
·Vol. 9
·期 1
·335-348
·
IF 8.131
Ningning Dong,Doudou Wu,Lifa Ge,Wei Wang,Fatang Tan,Xinyun Wang,Xueliang Qiao,Po Keung Wong
A brand-new advanced oxidation process (AOP) system consisting of MgO2 nanoparticles and MgNCN/MgO nanocomposites was firstly developed for the degradation of organic pollutants. In the novel AOP system, MgO2 nanoparticles as oxidants and MgNCN/MgO nanocomposites as activators were both obtained through a simple one-step process. Batch experiments indicated that the MgO2–MgNCN/MgO system could efficiently degrade organic pollutants in a wide pH range (4–12), and the degradation efficiency was hardly affected by common matrix species (Cl−, NO3−, HCO3−, SO42− and humic acid) and water sources. The high stability and slow-release characteristic of MgO2 endowed the AOP system with a long-term oxidation ability for continuous degradation of organic pollutants. The dominant reactive oxygen species (ROS) responsible for organic degradation was confirmed to be singlet oxygen (1O2), which was attributed to the activation of MgO2 by the bonding effect between MgNCN and MgO in the nanocomposites. Finally, the generated ions, NH4+, NO2− and NO3−, and residual solid in the degradation solution were determined, and the process of organic degradation in the MgO2–MgNCN/MgO system was proposed. This work not only constructed a brand-new AOP system for environmental remediation, but also offered a promising strategy for continuous treatment of organic-polluted wastewater and even soil.
研究领域:
环境科学
·
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Ningning Dong,Lifa Ge,Pei Chen,Wei Wang,Fatang Tan,Xinyun Wang,Xueliang Qiao,Po Keung Wong
Stable, cheap and environmentally friendly CaO 2 was widely used to remediate environmental pollution, especially in advanced oxidation process (AOP) systems. However, its non-radical activation was still a huge challenge. In this study, the non-radical activation of CaO 2 nanoparticles was realized by MgNCN/MgO composites for efficient remediation of organic and heavy metal-contaminated wastewater. The presented CaO 2 -based AOP system exhibited excellent degradation performance towards tetracycline (TC) and methylene blue (MB) over a broad pH range, accompanied with the weak influences of common coexisting anions and natural water sources. Singlet oxygen ( 1 O 2 ) was verified as the dominant active species for organics degradation, and the coordination between MgNCN and MgO in MgNCN/MgO composites played a crucial role in the non-radical activation of CaO 2 nanoparticles. More importantly, the AOP system could not only degraded effectively organic pollutants, but also remove simultaneously heavy metal ions in wastewater. 100 mg/L CaO 2 and MgNCN/MgO could successfully remediate the complex pollution consisting of 10 mg/L MB and 100 mg/L Cd 2+ . Furthermore, the degradation intermediates of MB and the solid residues after treating pollutants were analyzed in detail to reveal the degradation process and conversion products.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Tao Xiang,Jie Chen,Weizong Bao,Shuyan Zhong,Peng Du,Guoqiang Xie
Stress shielding is caused by the mismatch of stiffness between bone and implant materials, which may give rise to bone resorption and loosening, thereby causing implantation failure. There is a huge gap between Young's modulus of human bone and low Young's modulus β Ti alloys. A porous structure design can achieve the target of low Young's modulus, and thus achieve the matching between human bone and implant materials. However, a suitable space holder (SH) that can be applied at high temperatures and sintering pressure has not been reported. In this study, the TiZrNbTa/Ti titanium matrix composite (TMC) with high strength and large ductility was used as scaffold materials and combined the SH technique with the spark plasma sintering (SPS) technique to obtain a porous structure. A novel space holder, i.e., MgO particles was adopted, which can withstand high-temperature sintering accompanied by a sintering pressure. The porous TiZrNbTa/Ti with 40 vol.% MgO added exhibits a maximum strength of 345.9 ± 10.4 MPa and Young's modulus of 24.72 ± 0.20 GPa, respectively. It possesses higher strength compared with human bone and matches Young's modulus of human bone, which exhibits great potential for clinical application.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2024
·
IF 4.5
Xiangliang Meng,Jie Zhang,Honghui Guo,Jian Gao,Wei Li,Yuling Wu,Hong Yan,BaoLong Niu
MgO/Ag nanoparticles (NPs) have been surface modified with the silane coupling agent KH-570. The modified NPs (KMA) were added to poly (butylene succinate- co -terephthalate) (PBST) to prepare the K-PMA composite films. The modification improved the compatibility between MgO/Ag NPs and PBST matrix. The study comprehensively investigated the effects of modified MgO/Ag NPs on the mechanical, antibacterial, and preservation properties of bio-nanocomposite films. The incorporation of NPs substantially improved the mechanical and barrier properties of the PBST matrix. The composite films exhibited the best overall performance when the nanoparticle content is 3 %. In particular, the elongation at break, tensile strength, and water vapor permeability ( WVP ) were 794.67 %, 32.20 MPa, and 1.53 × 10 −11 g·m/m 2 ·s·Pa, respectively. Furthermore, the K-PMA-3 composite film exhibited excellent antibacterial properties and food preservation performance. The inhibition rates against Staphylococcus aureus ( S. aureus ), Escherichia coli ( E. coli ), and Salmonella paratyphi B ( S. paratyphi B ) were all over 98 %. After 6 days of preservation experiments, the mass loss of cherry tomatoes wrapped with K-PMA-3 film was only 5.9 %, which was only 45 % of the mass loss of cherry tomatoes wrapped with PMA-3 film. The results showed that the prepared biofilms have a great potential to be used as food packaging films.
研究领域:
材料科学
·
食品科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Fulong Cheng,Fangui Nie,Changxin Zhao,Wei Li,Jie Pan
Excessive phosphorus is regarded as one of the main causes of eutrophication, destroying the balance of the original ecosystem of water bodies and endangering human health. In this study, a novel MgO/ZrO 2 composite oxide with a hollow structure (MgZr-CS) was prepared by a simple carbon template method, and served as an adsorbent for the efficient uptake of phosphate from aqueous solutions. For comparison, MgO/ZrO 2 bimetal oxide (MgZr) was also prepared by the conventional co-precipitation method. The effects of pH and coexisting anions on the adsorption of phosphate were studied. The adsorption performance of materials was described by the adsorption kinetic model and isothermal model. The adsorption capability of both MgZr-CS and MgZr was negligibly affected by coexisting ions (e.g., Cl − , NO 3 − , HCO 3 − and SO 4 2− ) in water. The adsorption kinetic of both MgZr-CS and MgZr was better correlated with the pseudo-second-order kinetic model , while the adsorption isotherm followed the Langmuir model. However, the Langmuir maximum phosphate adsorption capacity of MgZr-CS was 149.3 mg/g at initial pH of 7, which was about twice that of MgZr. Remarkably, different from MgZr that only presented well phosphate adsorption performance under the acidic environment, MgZr-CS could maintain the excellent adsorption performance within a particularly wide pH range of 3–11. Compared to adsorbents reported in previous papers, MgZr-CS also exhibited larger adsorption capacity and higher pH stability. Moreover, MgZr-CS performed prominent in the treatment of actual domestic sewage, and its phosphate removal rate could reach 99.3%. The adsorption mechanism analysis revealed that the excellent phosphate performance of MgZr-CS was mainly due to the existence of oxygen vacancies providing more active adsorption sites. Results shown here indicated that MgZr-CS can be used as a potential adsorbent for phosphate.
研究领域:
环境科学
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水处理
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材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Shoufu Yu,Yuting Shi,Dandan Liu,Qian Gao,Xin Li,Chao Feng,Pengcheng Dai,Liangjun Li,Xin Gu,Yunqi Liu
Catalytic conversion of biomass-derived furfuryl alcohol (FFA) into high-value 1,5-pentanediol (1,5-PDO) is a promising route to decrease reliance on fossil energy, in which improving catalytic efficiency is a crucial issue. Herein, a series of CoMgO/C catalysts were synthesized from multivariate metal–organic frameworks (MOFs). It was found that the 3-CoMgO/C-500 catalyst exhibited the highest catalytic efficiency, achieving a 25.2 mmol/(g cat. ·h) 1,5-PDO productivity at 160 °C and 2.5 MPa H 2 pressure. Based on the characterizations and DFT calculations, the Mg clusters-derived MgO located adjacent to Co species and enhanced the dispersion of Co phase. Moreover, the spatial proximal MgO can effectively facilitate electron transfer, form interaction with Co active sites and promote the dissociation of hydrogen, which is favor for the hydrogenolysis process. Furthermore, with the assistance of MgO, the CoMgO/C catalyst could adopt the dual O adsorption configuration and activate the C2 O1 bond in FFA molecules, resulting in higher efficiency for the ring-opening reaction of FFA. This work reveals the assistance mechanism of MgO on improving catalytic performance of active sites through modulation of the electronic structure and adsorption configuration, which provides a deep insight into the design of economical and highly efficient catalysts for the production of bio-1,5-PDO.
研究领域:
催化化学
·
生物质转化
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2025
·
IF 5
Mengxing Ge,Maimaitijiang Mamuti,Deqiao Xie,Yun Ye,Youwen Yang,Huixin Liang,Yang Liu,Xinghai Ning,Zongjun Tian
In recent years, additive manufacturing of biodegradable composite ceramics has attracted widespread attention. This study explores the vat photopolymerization (VP) of Ca 3 (PO 4 ) 2 / MgO composite ceramics, investigating the VP slurry and the effects of material composition and light-curing parameters on the monolayer curing depth and excess curing width of the green body. When the curing parameters are consistent, the monolayer curing depth of the Ca 3 (PO 4 ) 2 group, composite group, and MgO group samples decreases successively. Whereas, the excess curing width sequentially increases. When the material is the same and the exposure energy is constant, the impact of exposure time on monolayer curing depth is higher than that of exposure intensity. Regarding excess curing width, the situation is completely reversed. This research serves as a reference for the development of composite ceramic slurries and the process of photopolymerization, providing theoretical guidance for controlling the precision of subsequent photopolymerization shaping.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
Liang Qingwen,Tang Ping,Zhou Jing,Bai Jinghe,Tian Dan,Zhu Xiaofei,Zhou Defeng,Wang Ning,Yan Wenfu
Solid state electrolytes have been intensively studied in the solid oxide fuel cells (SOFCs). The aim of this work is to investigate the effects of MgO and Fe2O3 dual sintering aids on the microstructure and electrochemical properties of solid state Gd0.2Ce0.8O2-δ (GDC) electrolytes, which are prepared by a sol-gel method with MgO and Fe2O3 addition to the GDC system. It is found that the addition of MgO and Fe2O3 can reduce the sintering temperature, increase densification and decrease the grain boundary resistance of the electrolyte. The 2 mol% MgO and 2 mol% Fe2O3 co-doped GDC (GDC-MF) exhibits the highest grain boundary conductivity. At 400°C, the grain boundary conductivity and total conductivity of GDC-MF are 15.89 times and 5.56 times higher than those of GDC. The oxygen reduction reaction (ORR) rate at the electrolyte/cathode interface of GDC-MF is 47 % higher than that of GDC. Furthermore, the peak power density of a single cell supported by GDC-MF is 0.45 W cm−2 at 700°C, 36.7% higher than that of GDC. Therefore, the GDC-MF should be a promising electrolyte material for intermediate-temperature solid oxide fuel cells (IT-SOFCs).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2023
·
IF 6
Jida Wang,Zhangshuai Ding,Feng Shi,Yifei Chen,Defa Hou,Fulin Yang,Can Liu,Yi Lu,Xu Lin,Zhifeng Zheng,Yunwu Zheng
An efficient and highly selective CaO-MgO-promoting γ-Al 2 O 3 decarboxylation catalyst was fabricated with different CaO to MgO ratios via a ball-milling method for regulating product distribution and production of gasoline-kerosene-diesel hydrocarbons via the catalytic copyrolysis of oleic acid (OA) and methanol under hydrogen-generating conditions. In addition, influencing factors, reaction mechanisms, possible reaction pathways and deactivation mechanisms were probed. The results showed that combining Ca, Mg and AlOx was vital for boosting oleic acid conversion, and synergy between metal and acid active sites via strong metal-support interactions enhanced deoxygenation-cracking activity. High-alkalinity CaO boosted C-C/C C bond cleavage, and MgO provided medium-strength Lewis acid sites; additionally, a large BET surface area and mesopore volume suppressed excessive hydrocracking reactions, improving biogasoline yield. Methanol addition provided active hydrogen atoms to enhance biogasoline selectivity at the expense of diesel and heavy oil production via olefinic cycles and aromatic cycle mechanisms and reduced coke deposition. The maximum hydrocarbon and biogasoline yields of 94.53% and 57.59% were achieved at OA/methanol= 5:1 and pyrolysis/catalytic temperature= 450/500 °C with1 g catalyst at a feedstock input rate of 0.1 ml/min.
研究领域:
能源化学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Sheng-Jin He,Jia-Pei Chen,Wei-Ming Guo,Xiu-Bing Chen,Huan Zhou,Chuang-Tian Zhan,Shi-Kuan Sun,Yun Li,Li-Xiang Wu,Jia-Xiang Xue,Hua-Tay Lin
In this study, CaO–Al 2 O 3 –MgO–SiO 2 glass was utilized to join SiC after surface polishing and etching, without the application of pressure. To join polished SiC at 1250 °C using CaO–Al 2 O 3 –MgO–SiO 2 glass proved unsuccessful. However, when polished SiC was joined at 1350 °C, the joint shear strength was 108.0 ± 15.5 MPa. Etching polished SiC with a NaOH–K 3 [Fe(CN) 6 ] solution effectively removed surface carbon, resulting in numerous micro-pits, that increased the joining area and improved the wettability of CaO–Al 2 O 3 –MgO–SiO 2 glass. The joint strengths of etched SiC joined at 1250 °C and 1350 °C were 29.0 ± 11.6 MPa and 125.1 ± 19.6 MPa, respectively. After ablation at 1200 °C for 10 min, the retained strength of the etched joints (joined at 1350 °C) was 61.9 ± 4.0 MPa, whereas the strength of the polished joints decreased to only 36.6 ± 10.7 MPa. Surface etching demonstrates the potential to significantly enhance the strength and high-temperature resistance of SiC joints.
研究领域:
材料科学
·
陶瓷工程
·
表面工程
✓ 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）