Article
Engineering, Electrical & Electronic
Jun Jian Zhang, Wei Dong Diao, Kai Fan, Zi Qi Wang, Rui Qi Shi, Zhi Hua Feng
Summary: A novel miniature linear ultrasonic motor was proposed in this paper, featuring a simple and compact structure that can drive bidirectionally at fixed frequency. With a voltage of 20 Vp-p and an optimal frequency of 583.5 kHz, the motor can generate a linear velocity of 81.1 mm/s and a driving force of above 5.7 gf, demonstrating relatively satisfactory output performance.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Acoustics
Parisa Sadeghpour, Mohammad Haghighi, Alireza Ebrahimi
Summary: The ZSM-5(UH250) catalyst synthesized through ultrasound-assisted rapid hydrothermal synthesis exhibited high crystallinity and improved physical and chemical properties, suitable for efficient conversion of methanol to propylene reaction. Under MTP reaction conditions, the catalyst showed stable methanol conversion and high propylene selectivity.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Hammad Saulat, Jianhua Yang, Song Wensen, Waseem Raza, Gaohong He
Summary: Isomorphous substitution of tungsten (W) in the MFI membrane improves hydrophobicity and achieves high selectivity for ethanol, making it a promising candidate for catalysts or separation membranes with wide applications.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Article
Chemistry, Applied
Lina Zhang, Liu Yang, Runze Liu, Xue Shao, Weili Dai, Guangjun Wu, Naijia Guan, Zhihui Guo, Weiping Zhu, Landong Li
Summary: This study demonstrates the construction of plate-like zeolites with controllable acidity, which significantly enhances the catalytic performance in methanol-to-olefins conversion.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Qian Ma, Tingjun Fu, Kun Ren, Han Li, Lihan Jia, Zhong Li
Summary: The controllable growth orientation of ZSM-5 can be achieved by introducing seeds and controlling medium pH, affecting product selectivity in methanol conversion reaction. The dissolution rate of seeds and aluminosilicate plays a critical role in determining the growth orientation of ZSM-5, with larger seed size promoting growth along the c axis.
INORGANIC CHEMISTRY
(2022)
Article
Green & Sustainable Science & Technology
W. Dai, L. Zhang, R. Liu, Z. Huo, N. Guan
Summary: In this study, plate-like MFI zeolites with different Si/Al (Ga) ratios were successfully prepared and applied in the methanol to propylene (MTP) conversion. The influences of zeolite morphology, acid density, and strength on the MTP activity and reaction mechanism were clarified. Plate-like MFI zeolites with lower acid density exhibited remarkable catalytic performance in the MTP conversion, while the Ga-MFI catalyst showed irreversible hydrolysis and could not be recycled. On the other hand, the plate-like ZSM-5 catalyst showed excellent stability and recyclability in the MTP conversion.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Crystallography
Sujin Kang, Jonghyeon Lee, Juhyun Yoo, Sun A. Whang, Suho Lee, Seonghoon Kee, Inho Im, Changwoo Oh
Summary: In this study, composite ceramics for an acoustic emission sensor application for nondestructive testing were developed using PNN-PZT-PMW system ceramics, which exhibited high piezoelectric properties suitable for devices such as piezoelectric sensors and ultrasonic transducers.
Article
Chemistry, Multidisciplinary
Mahboobeh Ejtemaei, Sepehr Sadighi, Mehdi Rashidzadeh, Sirous Khorram, Jan O. Back, Simon Penner, Michael F. Noisternig, Dariush Salari, Aligholi Niaei
Summary: This study investigates the surface treatment of kaolin and attapulgite/zeolite A extrudates using argon glow discharge plasma. The results show that plasma treatment increases surface area and pore volume, but decreases the weak acidic site density of the extrudates. The plasma-treated sample exhibits improved resistance to coke formation compared to the untreated one.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Chemistry, Physical
Parastoo Delir Kheyrollahi Nezhad, Maged F. Bekheet, Nicolas Bonmassar, Albert Gili, Franz Kamutzki, Aleksander Gurlo, Andrew Doran, Sabine Schwarz, Johannes Bernardi, Sebastian Praetz, Aligholi Niaei, Ali Farzi, Simon Penner
Summary: The role of earth alkaline doping in perovskite-based dry reforming of methane catalysts was investigated. The study found that doping can lead to the formation of stable carbonated species and hinder the sintering of Ni particles, but it has a stabilizing effect on the particle size of Ni.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Asghar Mohammadi, Ali Farzi, Christoph Thurner, Bernhard Kloetzer, Sabine Schwarz, Johannes Bernardi, Aligholi Niaei, Simon Penner
Summary: We manipulate the structure and performance of Pd - perovskite interfaces using different preparation methods to achieve optimum NO+CO reactivity in the presence of water. It is found that the extended interface sample aided by H2O can reduce CO poisoning, and the optimized use of lattice oxygen and replenishment from NO dissociation leads to the formation of more poisoning-resistant active sites. Additionally, reaction of species from H2O dissociation with adsorbed CO assists further surface clean off. This study is of great importance for improving catalytic activity and selectivity.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Green & Sustainable Science & Technology
Ali Sayyah, Elham Mahmoudi, Samira Farhoudi, Gamze Behmenyar, Abdullah Zahid Turan, Seyed Reza Nabavi, Aligholi Niaei
Summary: This paper presents a life cycle assessment case study for carbon dioxide methanation process. The results show that the type and conversion rate of the catalyst can affect the total emissions and life cycle impact of the system. Considering renewable and non-renewable energy sources, a combination of natural gas and wind turbines was found to have a smaller environmental impact.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Multidisciplinary
Neda Kalantari, Maged F. Bekheet, Parastoo Delir Kheyrollahi Nezhad, Jan O. Back, Ali Farzi, Simon Penner, Nagihan Delibas, Sabine Schwarz, Johannes Bernardi, Dariush Salari, Aligholi Niaei
Summary: In this study, chromium and boron were introduced into the hierarchical structure of ZSM-5 to enhance the catalysts' performance in the methanol-to-propylene process. The crystal structure and orientation of the synthesized zeolites were analyzed, revealing that the introduction of chromium and boron resulted in changes in the crystallinity and symmetry of the zeolites. The impregnated chromium-ZSM-5 catalyst showed superior performance in the production of light olefins, while the introduction of boron further improved the propylene selectivity and ratio.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Energy & Fuels
Mahboobeh Ejtemaei, Sepehr Sadighi, Mehdi Rashidzadeh, Sirous Khorram, Jan O. Back, Parastoo Delir Kheyrollahi Nezhad, Simon Penner, Michael F. Noisternig, Dariush Salari, Aligholi Niaei
Summary: In this study, the surface modification of attapulgite-bounded zeolite A by N-2/O-2 glow discharge plasma was investigated. It was found that the O-2 plasma treatment increased the surface acidity, while the N-2 plasma treatment decreased the acidity. The N-2 plasma-treated samples showed reduced coke formation and higher water sorption capacity.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2022)
Article
Chemistry, Physical
Asghar Mohammadi, Corsin Praty, Ali Farzi, Hamid Soleimanzadeh, Sabine Schwarz, Michael Stoger-Pollach, Johannes Bernardi, Simon Penner, Aligholi Niaei
Summary: This study investigates the effect of cerium and tungsten addition on the deNO(x) activity of V2O5/TiO2 catalysts in the NH3-SCR reaction. The addition of CeO2 and WO3 improves the operation temperature range and N-2 selectivity of the catalysts under dry and wet conditions. The thermal deactivation resistance of the catalysts is enhanced with increasing amount of WO3. Water decreases the overall catalytic activity at low temperatures but prevents the formation of N2O at high temperatures. CeO2 reduces the reducibility of the catalysts, while W increases the H-2 uptake.
Article
Materials Science, Ceramics
Azam Seifi, Dariush Salari, Alireza Khataee, Bunyemin Cosut, Leyla Colakerol Arslan, Aligholi Niaei
Summary: Undoped and metal doped nanocrystalline TiO2 transparent thin films were synthesized on glass substrates via sol-gel/dip-coating method. The prepared films exhibited anatase phase with a particle size of -100 nm and were uniformly distributed on the surface. Metal doping, specifically Sr-TiO2, improved the photocatalytic activity of the films, effectively degrading methylene blue dye under both UV and Vis lights through pseudo-first order kinetics.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Analytical
Payam Shahbazi-Derakhshi, Elham Mahmoudi, Mir Mostafa Majidi, Hessamaddin Sohrabi, Mohammad Amini, Mir Reza Majidi, Aligholi Niaei, Nima Shaykh-Baygloo, Ahad Mokhtarzadeh
Summary: In this research, a label-free electrochemical genosensing platform was developed for sensitive recognition of miRNA-21 in human gastric cell lines samples. The platform was based on the hybridization process using [Fe(CN)(6)](3-/4-) as a redox probe. Perovskite nanosheets were synthesized and combined with graphene oxide to create an effective electrochemical modifier. Gold Nano Particles (AuNPs) were immobilized on the modified electrode surface through chronoamperometry. The biomarker-detection bioassay exhibited high sensitivity and specificity, with a wide linear range for miRNA-21 detection.
Article
Polymer Science
Bahman Darabinajand, Abdolreza Mirmohseni, Aligholi Niaei
Summary: Polyurethane coatings are enhanced with ZSM-5 zeolite nanoparticles modified with graphene oxide to improve their barrier performance against corrosive species. The modified zeolite nanoparticles greatly influence the anticorrosion properties of the polyurethane coatings. Among various coatings, the PU/ZSM-5-GO coating shows the best protective properties against active corrosive species.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Mina Ranji Gargari, Elham Mahmoudi, Mir Mostafa Majidi, Hessamaddin Sohrabi, Mir Reza Majidi, Aligholi Niaei
Summary: In this study, perovskite nanocrystals were used to modify the surface of a glassy carbon electrode for the determination of Morin in kiwifruit samples. The electrochemical behavior of Morin on the modified electrode was investigated, and the analytical figures of merit were obtained. The designed sensing assay showed suitable analytical properties and high performance in real samples.
Article
Public, Environmental & Occupational Health
Asghar Hadi, Aligholi Niaei, Azam Seifi, Yahya Rasoulzadeh
Summary: This study investigated the effect of operational factors on formaldehyde removal using Ag3PO4/TiO2 photocatalyst. The results showed that the maximum formaldehyde degradation of 32% was achieved at an initial concentration of 2 ppm, 20% relative humidity, and 90 minutes of retention time. The operational factors, including retention time, relative humidity, and initial formaldehyde concentration, significantly influenced the efficiency of formaldehyde degradation by the photocatalyst.
HEALTH PROMOTION PERSPECTIVES
(2023)
Article
Engineering, Environmental
Elham Mahmoudi, Jafar Mostafaei, Christoph Griesser, Maged F. Bekheet, Nagihan Delibas, Simon Penner, Elnaz Asghari, Ali Coruh, Aligholi Niaei
Summary: In this study, composite materials with different compositions of LaCoO3-BaCoO3 were synthesized to determine the effect of Ba addition on LaCoO3 perovskite structures as efficient oxygen evolution reaction (OER) catalysts. The results showed that Ba did not significantly incorporate into the LaCoO3 structure, but formed BaCoO3 and BaCO3 side phases. It was also found that the addition of Ba increased the surface oxygen contribution and the number of oxygen species near surface oxygen vacancies. The electrochemical activity measurements revealed that BaCoO3 had the highest activity, with a low overpotential of 266 mV at 10 mA cm2 and excellent stability. These findings suggest that Ba-based perovskite materials have the potential to improve the electrochemical performance of current OER catalysts.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Mohammad Ahangari, Jafar Mostafaei, Ali Sayyah, Elham Mahmoudi, Elnaz Asghari, Ali Coruh, Nagihan Delibas, Aligholi Niaei
Summary: Perovskite materials SrFexCo1-xO3-delta (SCF-x, x = 0.2, 0.5, 0.8) were synthesized by sol-gel combustion and studied as electrode materials for supercapacitors. The synthesized samples were characterized using X-ray Diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), Raman spectroscopy, Scanning Electron Microscope (SEM), and Energy Dispersive X-ray Spectroscopy (EDS). Substitution in the perovskite structure affected the oxygen vacancy concentration and changed the electrochemical properties. SCF-0.8 exhibited the highest specific capacitance (433 F center dot g(-1)) at 2 A center dot g(-1) current density due to its morphology, crystal structure, and higher oxygen vacancy concentration. The electrochemical stability of SCF-0.8 was tested and it retained around 60% of its initial specific capacitance after 2500 charge-discharge cycles.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Multidisciplinary
Mohammad Ahangari, Elham Mahmoodi, Nagihan Delibas, Jafar Mostafaei, Elnaz Asghari, Aligholi Niaei
Summary: In this study, perovskite oxides (SrFeO3, SrCoO3, and SrCo0.5Fe0.5O3) prepared using the sol-gel method were investigated as electrode materials for supercapacitors. It was found that Co doping in SrFeO3 and SrCoO3 decreased the specific capacitance.
TURKISH JOURNAL OF CHEMISTRY
(2022)