Article
Chemistry, Multidisciplinary
Beom-Jun Kim, Jeong-Cheol Seo, Dong-Hyun Kim, Yeol-Lim Lee, Kyubock Lee, Hyun-Seog Roh
Summary: Ni-CeO2-MgO-Al2O3 catalysts with bimodal meso-macropores were synthesized using one-pot spray pyrolysis with dextrin as a structuring agent. These catalysts showed improved catalytic activity and stability in dry reforming of methane compared to dense catalysts. The formation of macropores from phase segregation and dextrin decomposition affected the physical and chemical features of the catalysts.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Chemistry, Physical
Yong-Hua Zhao, Jin-Tao Geng, Han-Dong Zhu, Qi-Jian Zhang, Huan Wang, Xiao-Qian Feng
Summary: Ordered mesoporous Ni-xMg-Al2O3 catalysts were synthesized by an improved one-pot evaporation-induced self-assembly method to overcome the issues of sintering and carbon accumulation in the CO2 reforming of CH4. The introduction of Mg maintained the ordered mesoporous structure, enhanced the interaction between Ni and Al2O3, and reduced the number of acid sites. The Ni-3Mg-Al2O3 catalyst exhibited the highest catalytic activity and stability, achieving CH4 and CO2 conversions of 81.97% and 89.11%, respectively, without deactivation for 20 hours. (c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Xiangyu Yan, Buchu Lu, Hao Dong, Qibin Liu
Summary: Combining solar light and heat in dry reforming of methane (DRM) is a promising technology for CO2 reduction and increased solar energy utilization. The mechanism of the reaction and the synergistic effects of solar light and heat in DRM are investigated using a nanoscale Ni/CeO2 catalyst. The results show that the conversion rate of CH4 increases by 39.74% and the reaction temperature is reduced by 45 degrees C under photo-thermochemical conditions. Solar light enhances the dissociation of CH4 and the production of HCOO* on the catalyst surface, leading to improved DRM performance. These findings contribute to the understanding of the synergistic effects of solar light and heat and guide the conversion of CO2 into fuel using solar energy.
Article
Materials Science, Ceramics
Toshihiko Osaki
Summary: Nickel-alumina cryogel and xerogel catalysts showed similar catalytic activity in CO2 reforming of CH4, but carbon formation was more effectively suppressed on the cryogel. Freeze drying improved the structural and textural properties of alumina gel, resulting in finer nickel particles dispersed throughout the gel.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Multidisciplinary Sciences
Zenan Ni, Xavier Djitcheu, Xiaoxu Gao, Jian Wang, Huimin Liu, Qijian Zhang
Summary: This study investigates the matching between Ni and CeO2 on different prepared Ni/CeO2 catalysts and its effect on CO2 reforming of CH4 (CRM). It is found that Ni/CeO2-H prepared by the hydrothermal method shows the best catalytic performance with an initial conversion rate over five times higher than Ni/CeO2-P prepared by precipitation method and Ni/CeO2-C prepared using commercial CeO2.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Multidisciplinary
Yibo Liu, Xiaoqiang He, Wenlong Mo, Song Qin, Jinchun Guo, Yuanjian Deng, Bujannat Abudurehman
Summary: Ni/Al2O3 catalysts were prepared using different nickel sources, and it was found that the anions in the nickel sources significantly influenced the catalyst performance. The catalyst prepared with Ni(NO3)(2)center dot 6H(2)O exhibited higher activity and stability.
Article
Nanoscience & Nanotechnology
Junjie Chen, Hien N. Pham, Tala Mon, Todd J. Toops, Abhaya K. Datye, Zhenglong Li, Eleni A. Kyriakidou
Summary: Catalytic oxidation of CH4 over nonprecious Ni/CeO2 catalysts with different CeO2 support morphologies (nanoparticles (P), rods (R), cubes (C)) and synthetic procedures (precipitation, sol-gel (SG)) was studied. The relationship among CeO2 morphologies, redox properties, surface areas, and CH4 oxidation activity was established. CeO2-R support showed higher oxygen vacancies, improved OSC and CH4 oxidation activity compared to CeO2-P and CeO2-C supports. The same activity pattern was observed for Ni containing catalysts (Ni/CeO2-R > Ni/CeO2-P > Ni/CeO2-C). Increasing CeO2 surface area by sol-gel synthesis method (CeO2-SG) improved the CH4 oxidation performance of CeO2-SG and Ni/CeO2-SG compared to CeO2-R and Ni/CeO2-R, respectively. All studied Ni/CeO2 nanocatalysts showed improved hydrothermal stability compared to conventional Pd/Al2O3.
ACS APPLIED NANO MATERIALS
(2023)
Review
Chemistry, Physical
S. Anil, S. Indraja, R. Singh, S. Appari, B. Roy
Summary: This article examines the impact of modifying nickel with various noble and non-noble metals and altering supports with different metal oxides on ethanol steam reforming (ESR) reaction. It explores the reaction mechanisms and thermodynamics, emphasizing the importance of catalyst morphology, active metal promoter, and support modifier in hydrogen production and carbon deposition prevention.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Rubina Khatun, Nazia Siddiqui, Rohan Singh Pal, Sonu Bhandari, Tuhin Suvra Khan, Shivani Singh, Mukesh Kumar Poddar, Chanchal Samanta, Rajaram Bal
Summary: This study investigates the low temperature reforming of methane with CO2 over mono- and bi-metallic solid solution catalysts. The Pt-Ni/CeO2 catalyst shows excellent performance with high conversion and selectivity at low temperatures. DFT calculations reveal that Pt-Ni/CeO2 catalyst has lower activation energy.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Energy & Fuels
Ji Su Yu, Jae Min Park, Jae Hyeon Kwon, Kyung Soo Park, Jin Woo Choung, Myung-June Park, Jong Wook Bae
Summary: In this study, the catalytic and thermal stability of Ni nanoparticles were enhanced by using an ordered mesoporous Al2O3 support and successive Al2O3 protective layers. This resulted in improved catalytic activity and stability for steam and CO2 reforming with CH4 (CSCR). The synergy effects of the Al2O3 overlayers on the ordered mesoporous Ni/m-Al were attributed to the formation of strongly interacted Ni-Al2O3 interfaces, which restricted the migrations of the Ni nanoparticles and preserved their original sizes.
Article
Chemistry, Physical
O. Shtyka, Z. Dimitrova, R. Ciesielski, A. Kedziora, G. Mitukiewicz, J. Leyko, W. Maniukewicz, A. Czylkowska, T. Maniecki
Summary: Ethanol steam reforming over Ni supported catalysts was studied, with investigations into the effects of different supports, metal loadings, activation methods, and steam-to-ethanol ratios. The addition of ZnO or CeO2 to alumina was found to enhance ethanol conversion and hydrogen selectivity. High process temperature and water-to-ethanol ratio were beneficial for hydrogen production, while catalyst stability tests showed no loss of activity over 50 hours.
REACTION KINETICS MECHANISMS AND CATALYSIS
(2021)
Article
Energy & Fuels
Pengfei Cao, Haitao Zhao, Stephen Adegbite, Bolun Yang, Edward Lester, Tao Wu
Summary: The use of K2CO3 as a promoter enabled dynamic coke elimination reaction over Ni/Al2O3 catalysts for CO2 reforming of CH4, significantly improving coke resistance and long-term stability. The addition of K2CO3 suppressed Ni particle growth and enhanced the interaction between Ni and Al2O3, leading to improved adsorption of CO2 and facilitating the DRM process. Furthermore, K2CO3 enabled a dynamic coke elimination reaction (KCER) by enhancing catalytic reaction of disordered carbon with CO2, which is a promising low-cost approach to stabilize the performance of Ni-based catalysts in DRM reaction.
Article
Chemistry, Applied
Muhammad Masood Khan, Lijun Jin, Muhammad Mahmood Khan, Yang Li, Hammad Saulat, Yun Zhang, Muhammad Sarfraz, Jialong Zhu, Haoquan Hu
Summary: The addition of activated carbon to Ni/MgO-Al2O3 catalyst improved textural properties, increased surface area and pore volume, and decreased the size of metal Ni. The 10% activated carbon loading in 10AC-Ni/MgO-Al2O3 exhibited the best catalytic activity and stability.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Wahab O. Alabi, Hui Wang, Bukola M. Adesanmi, Mohsen Shakouri, Yongfeng Hu
Summary: The study investigated the relationship between the structure, Ni/Co reduction, site formation, and catalytic performance of a Ni-Co-Al-Mg-O composite synthesized via co-precipitation for CO2 reforming of CH4. It was found that a higher MgO solid solution phase enhances the reduction of Ni and Co, leading to the formation of more smaller metallic sites. Catalysts with lower Mg/Al ratios experienced carbon deposition and produced synthetic gas of low H-2/CO ratio, while those with higher Mg/Al ratios suppressed carbon formation, maintaining higher catalytic activity and stability.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Chemistry, Multidisciplinary
Renata O. da Fonseca, Antonella R. Ponseggi, Raimundo C. Rabelo-Neto, Rita C. C. Simoes, Lisiane Mattos, Fabio B. Noronha
Summary: The study found that an increase in Ni crystallite size promotes the formation of carbon, but carbon deposition is negligible when the crystallite size is either small or large. Oxygen vacancies do not contribute to carbon removal from the Ni surface.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Chemistry, Physical
Nazanin Mikaeeli, Mohammad Haghighi, Esmaeil Fatehifar, Maryam Shabani
Summary: A Y AgBr0.75Cl0.25 solid solution was prepared on carbon defects-MWCNTs and modified with DBD-plasma to fabricate an excellent nanophotocatalyst for efficient degradation of dye pollutants. This catalyst exhibited improved band gap, SPR property, reduced recombination rate, enhanced separation and transmission of charge carriers, and increased access to active sites, leading to excellent photocatalytic performance.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Environmental
Neda Vardast, Mohammad Haghighi, Hossein Zeinalzadeh
Summary: This study successfully produced efficient and stable biodiesel from waste oil containing high free fatty acids using sonoassisted designed CeO2 = 20% nanocatalyst. The activity of the nanocatalysts is influenced by the dispersion of active components, specific surface area, pore volume, and acidity, with CeO2 = 20% showing the best performance.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Parisa Sadeghpour, Mohammad Haghighi, Amir Haghighi, Maryam Shabani
Summary: This study introduces the ultrasonic-promoted growth of staggered heterostructured nanoparticle-on-nanolayer tin(II) oxide-bulk carbon nanophotocatalysts. The photocatalytic performance of various ratios of SnO2-bulk g-C3N4 nanophotocatalysts was investigated, and the structural properties of the samples were analyzed using multiple characterization techniques. It was found that the tin oxide content in the nanocomposite framework significantly affected the structural properties of the photocatalysts and the separation efficiency of electrons and holes. The suggested reaction mechanism for dye degradation was also discussed in detail.
Article
Chemistry, Multidisciplinary
Seyed Mehdi Sajjadi, Mohammad Haghighi, Farhad Rahmani, Javad Eshghi
Summary: The aim of this study was to design nanocatalysts with enhanced anti-coke ability, high catalytic activity and stable performance for the oxidative conversion of CH4/CO2 mixture to syngas. NiAl2O4, WNiAl2O4, and CoWNiAl2O4 nanocatalysts were fabricated using sol-gel technique, and plasma treatment was utilized to enhance the performance of CoWNiAl2O4. The results showed that the addition of tungsten improved the rate of coke gasification and stability of the NiAl2O4 nanocatalyst, while the catalytic activity of WNiAl2O4 was lower due to active sites coverage. Cobalt addition was made to compensate for the reduction of catalytic activity, resulting in smaller particle size and uniform dispersion. However, the sol-gel prepared CoWNiAl2O4 showed higher coke deposition and deactivation. The plasma-enhanced sol-gel fabricated CoWNiAl2O4 exhibited excellent dispersion, fine particle size, strong metal-support interaction, and high surface area, leading to a X-CH4 of 92% at 850 degrees C. A well-maintained structure and excellent dispersion were observed after 48 h TOS.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Chemistry, Physical
Amin Sokhansanj, Mohammad Haghighi, Maryam Shabani
Summary: In this study, novel CuBi2O4 surface-sensitized bismuth subcarbonate nanoheterojuncted photocatalysts were prepared using hydrothermal technique with ultrasonic waves. The photocatalysts exhibited high degradation efficiency for malachite green under sunlight irradiation due to their heterojunction formation and flowerlike morphology. The structural, morphological, and optical properties of the nanophotocatalysts were investigated, and the stability, reaction mechanism, and kinetic evaluation of the selected photocatalyst were examined.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Marziyeh Shabani, Mohammad Haghighi, Alireza Ebrahimi, Sogand Aghamohammadi
Summary: The simultaneous effect of Si source and CTAB application as a surfactant on SAPO-34 preparation was investigated. TEOS as the Si source resulted in small crystallites of SAPO-34, while fumed silica led to larger crystallites.
RESEARCH ON CHEMICAL INTERMEDIATES
(2023)
Article
Energy & Fuels
Ensie Bekhradinassab, Akram Tavakoli, Mohammad Haghighi, Maryam Shabani
Summary: The efficient tablet-like manganese and iron incorporated titania catalyst was synthesized via microwave in the presence of 2-hydroxyethylammonium sulfate (ILS) as both fuel and sulfating agent for biodiesel production. The nature of fuels affected the catalyst's physicochemical properties and performance. MnFeTi(ILS) showed a good capability for producing biodiesel from sunflower and waste oil.
Article
Surgery
Pirouz Samidoust, Mohammad Taghi Ashoobi, Manouchehr Aghajanzadeh, Mohammad Sadegh Esmaeili Delshad, Mohammad Haghighi
Summary: Boerhaave's syndrome is a rare condition characterized by spontaneous esophageal perforation, which has a high morbidity and mortality rate if not diagnosed and treated promptly. This case report presents a patient with achalasia who was diagnosed with Boerhaave's syndrome and had a good outcome after early diagnosis and treatment.
INTERNATIONAL JOURNAL OF SURGERY CASE REPORTS
(2023)
Article
Environmental Sciences
Fatemeh Yousefi, Mohammad Haghighi, Maryam Shabani
Summary: A novel potato-on-rod-like Z-scheme plasmon Ag2CrO4-Ag2Mo2O7 heterojunction nano-photocatalyst was synthesized to degrade organic dyes under artificial sunlight. Characterization analysis confirmed the suitable structure and surface morphology of the photocatalyst, which exhibited remarkable catalytic activity. The catalyst also showed stability and reusability.
ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Chemical
Salar Mahboob, Mohammad Haghighi, Maryam Shabani, Amir Haghighi
Summary: This study investigates the sono-photodegradation of methylene blue using plasma-treated Fe2O3-ZnO/rGO as a photocatalyst. The plasma treatment enhances the contact area between nanoparticles and rGO sheets, leading to improved degradation performance. The plasma-treated Fe2O3-ZnO/rGO also exhibits good reusability, making it a promising catalyst for wastewater treatment.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Engineering, Environmental
Ali Mohammadi, Mohammad Haghighi, Maryam Shabani
Summary: A novel mesoporous nanosheet Z-scheme NCQDs-BNiO/Bi7O9I3 heterojunction nanophotocatalyst has been synthesized by the facile sonosolvothermal method and demonstrated its efficient removal of antibiotic/fluoroquinolones and solid/liquid phase photocatalytic reduction of CO2 under simulated solar light. The synthesized photocatalysts exhibit increased structural defects, enhanced optical absorption and excellent pharmaceutical pollutant removal efficiency, attributed to the efficient surface reactions, mass transfer facilitation and surface adsorption, as well as the utilization of ultrasound waves. The quintessential photocatalyst shows significant photoreduction activity in producing methanol.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Chemistry, Physical
Seddigheh Kohansal, Mohammad Haghighi, Maryam Shabani, Niloufar Mohseni
Summary: The study presents the fabrication of Z-scheme heterojunction sheet-like photocatalysts for environmental pollution control. By adjusting the fuel to oxidizer ratio, the physicochemical properties of the photocatalysts were optimized. The heterojunction nanosheets showed superior performance in removing aqueous tetracycline-HCl under solar light irradiation, attributed to the improved light harvesting, charge separation and transfer, as well as the increased pore volume and specific surface area.
SURFACES AND INTERFACES
(2023)
Article
Green & Sustainable Science & Technology
A. Niyati, M. Haghighi, M. Shabani
Summary: Novel plasmonic Ag-Bi4O5I2/carbonaceous nanocomposites were prepared and used for the photo-decomposition of fluoroquinolone antibiotics. The carbonaceous materials significantly increased the specific surface area and pore size of Bi4O5I2, resulting in remarkable activity for degradation. The Ag-Bi4O5I2/rGO nano photocatalyst showed excellent stability and high reusability.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Green & Sustainable Science & Technology
E. Abbasi, M. Haghighi, M. Shabani, A. Niyati, S. Mahboob
Summary: This study investigates the sonophotocatalytic degradation of organic pollutants over double Z-scheme plasmonic ZnO-Cu-CuO hybridized two-dimensional C3N4. It is found that the ZnO-Cu-CuO/C3N4 catalyst synthesized using ultrasound waves exhibits good catalytic properties, and increasing sonication power reduces the intensity of plasmonic Cu particles and increases the mesopore volume, facilitating the penetration of pollutants.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Engineering, Environmental
Leila Yosefi, Mohammad Haghighi, Mahin Maleki
Summary: In this study, p-n type BixOyIz/ZnFe2O4 nanoheterojunction was prepared using a two-step solvothermal-precipitation route in different solvents. The influence of solvent on the physicochemical and optical properties of the samples was investigated. The results showed that samples mediated by ethanol exhibited superior performance compared to those mediated by ethylene glycol, methanol, and water. This can be attributed to the band position of the nanophotocatalysts, with Bi7O9I3/ZnFe2O4 and BiOI/ZnFe2O4 exhibiting type I and type II heterojunction structures, respectively.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
