INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Songlin Wang,Yu Guo,Qi Liu,Peng Yang,Huabo Li,Lei Liang,Hongying Niu,Qiying Zhang,Yanyan Liu,Jianji Wang
The synthesis of carbonates by using nontoxic feedstocks and ecofriendly heterogeneous catalysts has received great attention but remains a significant challenge. Herein, a series of Mg/Al-codoped porous carbons (MgAl@CM) were developed and applied for transesterification to synthesize methyl phenyl carbonate (MPC). The results showed that MgAl@CM possessed abundant mesopores, large amounts of N/O-containing groups, and dispersed Mg/Al species. And 1Mg5Al@CM-700 exhibited the highest catalytic activity with a diphenyl carbonate conversion of 80.2% and MPC selectivity of 99.6% due to its unique structure and acidic–basic properties, indicating a highly efficient acid–base synergistic catalysis process. Moreover, the catalyst presented good stability and reusability for six recycles without a substantial activity loss. The mechanism based on the synergistic catalysis was investigated. This work provides a novel perspective for the design of heteroatom-doped carbon catalysts to accomplish an efficient MPC synthesis.
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RESEARCH ON CHEMICAL INTERMEDIATES
·
2013
·Vol. 41
·期 4
·2345-2352
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IF 0.88
Liu Bin,Li Xiao Fang,Zhang Jie,Wang Meng Ting,Zeng Rong Jin
The conjugate addition of bromoform with 2-aryliene-2,3-dihydro-1 H -pyrrolizin-1-ones in the presence of magnesium afforded novel 2,2-dibromo-3-arylspiro[cyclopropane-1,2′-pyrrolizin]-1′(3′ H )-ones in moderate yield. The structures of all the products were characterized thoroughly by 1 H NMR, 13 C NMR, infrared spectroscopy, and mass spectrum.
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OPTICAL MATERIALS
·
2021
·
IF 3.08
Yunpeng Wang,Ruiting Hao,Jie Guo,Xiaoming Li,Shuiliu Fang,Huimin Liu,Shuaihui Sun
In this paper, magnesium was successfully introduced into CZTS using the DMF-based solution method, and CZMTS solar cell was prepared. The effects of Mg doping on the morphology, crystal structure, and electronic properties of the CZTS absorber were investigated in detail. The crystal structure of the CZMTS absorber and the chemical valence states of the other elements (Cu, Zn, Sn, and S) were not changed as shown by XRD , Raman, and XPS analyses. The results show that Mg doping can improve the electronic properties and microstructure of CZTS absorbers, thus enhancing the PCE from 2.91% to 4.10%. This performance enhancement is associated with good crystal quality, reduced cation-disordering defects, and high external quantum efficiency at the longwave region caused less recombination and open circuit voltage loss. Therefore, Mg doping has a positive effect on improving the performance of CZTS solar cells.
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JOURNAL OF HAZARDOUS MATERIALS
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2022
·
IF 14.224
Jing Zhang,Wenyu Xie,Shasha Chu,Zhangbin Liu,Zhen Wu,Yingying Lan,Vladimir V. Galvita,Lijuan Zhang,Xintai Su
Chromium ore processing residue (COPR) is a hazardous waste generated during the production of chromate. Currently, approximately 10% of Cr 2 O 3 cannot be extracted after chromite sodium roasting and remains in COPR, wasting valuable Cr resources. In this study, Mg was selectively removed by using (NH 4 ) 2 SO 4 roasting in combination with H 2 SO 4 leaching. The results showed that the selective removal of 79.55% Mg from COPR could be achieved under the optimum (NH 4 ) 2 SO 4 roasting conditions (80 mmol (NH 4 ) 2 SO 4 , 800 °C, 2 h). During the subsequent sodium roasting and acid leaching stages, the Cr extraction rate was 84.63% for the COPR direct roasting and 95.39% for the Mg removal residue roasting. The increased Cr extraction efficiency is attributed to the transformation of Mg-rich spinel and diopside (the Mg & Cr coexisting phases) in COPR converted into easily extractable (Fe,Cr) 2 O 3 and Cr 2 O 3 after the Mg treatment. This study investigated that the phase transformation of the Cr host phases is crucial for the sufficient extraction of Cr and provides inspiration for the development of efficient and practical Cr extraction techniques. Moreover, the method can be extended to the effective extraction of Cr from other Cr-containing wastes.
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高影响因子
SCANNING
·
2020
·
IF 1.33
Lin Sun,Bing Cheng Zhao,Teng Wang,Jia Yi Cui,ShuXin Zhang,Feng Li,Qianqian Zhang,HongXin Cai,Heng Bo Jiang,Eui-Seok Lee
The application prospect of biodegradable materials is being studied extensively. However, the high corrosion rate and its alloys in body fluids have been major limitations of the application of pure Mg (magnesium). To improve corrosion resistance of biodegradable AZ31 Mg alloy, we adopted microarc fluorination within a voltage range of 100-300 V in 46% hydrofluoric acid. To obtain morphologies, chemical compositions, and structural characteristics, field-emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD) were performed, respectively. Results showed that the coating was mainly composed of MgF2. Electrochemical corrosion and immersion tests proved that the corrosion resistance of MAF-treated AZ31 Mg alloy was significantly improved compared with untreated AZ31 Mg alloy in HBSS (Hank’s Balanced Salt Solution). Current densities of AZ31, MAF100, MAF150, MAF200, MAF250, and MAF300 were 342.4, 0.295, 0.228, 0.177, 0.199, and 0.212 μA/cm2, respectively. The roughness test indicated that samples under MAF treatment of 200 V, 250 V, and 300 V had large surface roughness. Meanwhile, the contact angle measurement and surface free energy test suggested that those samples had smaller contact angle and higher SFE than Ti. Thus, MAF-treated AZ31 Mg alloy might have promising application in various fields.
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高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Song Xu,Yan Gao,Ling Zhao,Huaijie Cao,Junxi Zhang
Solely inorganic silica (SiO 2 ) coating cannot provide long-term corrosion protection on metal due to structural defects. Herein, acidified Halloysite (Hal) was proposed and the Hal tubes were incorporated into SiO 2 sol coating for enhancing corrosion resistance on AZ31B magnesium (Mg) alloy. SiO 2 sol originated from the hydrolysis of water glass (Sodium silicate). With improved interaction between Hal and SiO 2 , the cracks and structural defects in cured SiO 2 coating can be reduced. As a result, the impedance modulus at 0.01 Hz (|Z| 0.01 Hz ) of the acidified Hal/SiO 2 composite coating (AG coating) increased to 10 9 Ω·cm 2 , outperforming 2 orders of magnitude higher than pure SiO 2 coating (pure coating) counterpart. The corrosion current density decreased to 9.33×10 –12 A·cm -2 . Besides, the AG coating offered stable corrosion resistance after immersion tests for 30 days, which was comparable to anti-corrosive polymer coating. The release of amorphous SiO 2 from acidified Hal reduced the internal stress. The H + on Hal induced a decrease of pH and adsorption of residual Na + , thereby improving structural integrity and water resistance of SiO 2 coating. Differing from other fillers (CNTs, graphene, MXene), this work proposed a low-cost Hal tube as filler for designing inorganic coating for corrosion protection on Mg alloy. It also shed insight into understanding the underlying corrosion protection mechanism of inorganic SiO 2 coating on metal.
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DALTON TRANSACTIONS
·
2025
·
IF 3.3
Tong Wu,Lei Kang,Fan Liu,Ruixin Guo,Shu Guo,Tianhong Huang,Shuangyue Shang,Lijuan Liu,Xiaoyang Wang
Cation regulation is a compelling strategy for developing new compounds with optimized crystal structure by atomic-scale manipulation. Herein, we report two new SBBO-like fluoroberyllium borates, SrMgBe₂(BO₃)₂F₂ (SMBBF) and SrZnBe₂(BO₃)₂F₂ (SZBBF). They crystallize in a trigonal system and feature a [Be₃B₃O₆F₃]∞ single layer stabilized by the incorporation of Mg²⁺/Zn²⁺ cations and F⁻ cations. Both compounds exhibit deep-UV absorption edges below 200 nm. Theoretical calculations confirm their potential as deep-UV birefringent materials, with correspinding birefringence values of 0.064 (SMBBF) and 0.063 (SZBBF) at 589 nm, respectively. This work demonstrates the effectiveness of cation regulation in designing novel borate-based optical materials.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Muhammad Junaid Khan,Muhammad Rehan Islam,Farooq Hafeez,Chunyan He,Jun Zhang,Yunlei Xianyu
The proliferation of pathogenic microorganisms is a significant cause of food spoilage, resulting in substantial economic losses and public health risks. To ensure food safety and extend shelf life, packaging must not only maintain product integrity but also prevent contamination by multidrug-resistant (MDR) pathogens such as Escherichia coli ( E. coli ), Listeria monocytogenes ( Listeria ), and Candida albicans ( C. albicans ). In this study, we developed a multifunctional nanocomposite (Mg-MOF-74@CA/CNF) by integrating magnesium-based metal–organic framework (Mg-MOF-74), carvacrol (CA), and chitin nanofibers (CNF). This nanocomposite was subsequently incorporated into a polyvinyl alcohol (PVA) matrix to fabricate the final film (Mg-MOF-74@CA/CNF/PVA). The resulting film demonstrated excellent antimicrobial activity, achieving up to 98 % inhibition of MDR pathogens through reactive oxygen species (ROS) generation and disruption of microbial membranes. In addition, the film exhibited improved thermal stability, enhanced tensile strength, and superior barrier properties against oxygen and water vapor. Application tests on cherry, cauliflower, and chicken confirmed significant reductions in microbial growth and weight loss, alongside prolonged shelf life while maintaining product quality. These findings highlight Mg-MOF-74@CA/CNF/PVA as a sustainable and effective alternative to conventional packaging materials, offering both food preservation and enhanced safety.
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TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2026
·Vol. 36
·期 9
·2638-2649
·
IF 5.5
Zhi-yuan LIU,Li JIN,Jian ZENG,Shuai DONG,Feng-hua WANG,Fu-lin WANG,Jie DONG
The influence of the volume fraction of B 4 C nanoparticles (B 4 C np ) on the mechanical properties of Mg−B 4 C composites was investigated. Mg− x B 4 C ( x =5 and 7 vol.%) composites were fabricated via low-energy ball milling, spark plasma sintering (SPS), and hot extrusion. The Mg−5vol.%B 4 C composite exhibited a Young’s modulus of 55.2 GPa, indicating a 23.5% increment over that of pure Mg and in good agreement with the results from the Hashin−Shtrikman (H−S) model. However, a higher B 4 C np content reduced the efficiency of modulus enhancement due to nanoparticle agglomeration and interfacial reaction. The Mg−5vol.%B 4 C composite also achieved yield strength and ultimate tensile strength improvements of 16.8% and 9.1%, respectively. Quantitative analysis indicated that thermal mismatch strengthening was the dominant strengthening mechanism, while both thermal mismatch strengthening and Orowan strengthening showed size-dependent behavior linked to nanoparticle clustering.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
·
IF 5.4
Meisi Chen,Dandan Hao,Yuwen Shao,Tong Zhao,Chengyi Qiu,Xiemin Liu,Muhua Chen,Gang Zhang,Xinbao Zhu,Bo Fu
Cellulose directs Mg/Ni-MOF-74 growth on fiber surfaces. • Tuning Mg/Ni ratio optimizes pore structure and open metal site characteristics. • MNC-1 exhibits high CO 2 capacity and CO 2 /N 2 selectivity (>200). • Hierarchical porosity facilitates both CO 2 confinement and gas mass transfer. • Low isosteric heat of adsorption promotes easy regeneration. To overcome the poor dispersibility and limited gas mass transfer of MOF powders, a series of Mg/Ni-MOF-74/cellulose composites (MNC-x) were fabricated via cellulose interface directed in situ growth. The effects of the Mg/Ni ratio on the material structure and CO 2 /N 2 adsorption performance were investigated. Results showed that the introduction of Ni altered the local environment and crystal size, regulating the pore structure and adsorption sites of the MNC-x series materials. The optimal sample (MNC-1) achieved a static CO 2 adsorption capacity of 2.67 mmol·g −1 at 298 K and exhibiting superior cycling performance. IAST theoretical calculations indicated that MNC-1 possessed high CO 2 /N 2 selectivity, with an initial isosteric heat of adsorption of only 34.51 kJ·mol −1 , indicating that physical adsorption was predominant. Combined with DFT analysis, the excellent CO 2 adsorption performance of MNC-1 was mainly attributed to the interaction between the open metal sites of Mg/Ni and CO 2 , as well as the hierarchical pore structure formed by the microporous adsorption sites and mesoporous mass transfer channels. This study provides a feasible strategy for designing cellulose-supported, processable bimetallic MOF adsorbents for CO 2 adsorption. Download: Download high-res image (269KB) Download: Download full-size image
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Engineering Reports
·
2025
·Vol. 7
·期 9
·e70327
·
IF 2
Christina H. M. Tsang,Ruilong Zhang,Wei Xiong,Davidraj Johnravindar,Puranjan Mishra,Jun Zhao
The escalating demand for plastics has necessitated advancements in plastic recycling technologies. This study examines the development of heterogeneous metal catalysts aimed at improving the hydrolysis performance of polyethylene terephthalate (PET), a commonly used plastic, and enhancing the conversion efficiency for the efficient production of terephthalic acid (TPA). A series of Mg-Al bimetallic oxide with varying Mg and Al ratios were synthesized and employed as catalysts for the hydrolysis of PET under various conditions, including reaction temperature (80°C–220°C), reaction time (10–300 min), and solvent ratio. Optimization of the process revealed that the optimal conditions for catalytic hydrolysis were achieved at 200°C, 300 min, using a Mg-Al-1 catalyst and a solvent ratio of 5:5 ethanol to water, resulting in a PET conversion efficiency of 95.6% and a TPA yield of 80.3%. Over 70% TPA yield could be generated after first hydrolysis without regeneration. Under hydrothermal conditions, polyethylene glycol instead of ethylene glycol was found after reaction, as identified by liquid chromatography–mass spectrometry (LC–MS). This study offers a sustainable and feasible pathway for TPA recovery from PET, contributing to the advancement of recycling technologies.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Zehang Zhao,Guanjiu Wu,Duan Wen,Minkang Li,Yuan Li,Lu Zhang,Shumin Han
A 2 B 7 -type La–Mg–Ni-based alloys are considered as promising hydrogen storage materials . However, low absorption/desorption platform pressure and poor cycling stability restricts their practical application. The neodymium element could improve the hydrogen absorption/desorption platform pressure and the cycling stability with its smaller atomic radius and larger electronegativity . In this study the Nd 1– x Mg x Ni 3.50 ( x = 0.25, 0.30, 0.36) alloys were prepared and Mg variation was adopted to tailor the microstructure and hydrogen storage performances. All the alloys consist of Gd 2 Co 7 -type and Ce 2 Ni 7 -type superlattice structure , and the cell parameters ( a , c and V ) are reduced by increasing Mg content. The higher Mg content yields a higher plateau pressure, a higher cycling stability and an easier hydrogen release. The x = 0.30 alloy shows a plateau pressure of 0.81 MPa, a 100th-cycle capacity retention rate of 91.0 %, and a dehydriding enthalpy change of 19.18 kJ mol −1 . These good comprehensive hydrogen storage performances are attributed to the promoted crystallographic stability and reduced cell parameters.
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