Article
Chemistry, Applied
Xiaoli Wei, Qianwei Cheng, Tingguang Sun, Shan Tong, Luli Meng
Summary: The Al2O3-ZrO2-TiO2 solid acid catalyst prepared by a co-precipitation/impregnation method showed high efficiency and stability in the epoxidation of soybean oil, with a higher oil conversion rate compared to conventional catalysts and maintained performance even after three cycles of recycling. Its performance was slightly superior to that of H2SO4, making it a potential candidate for catalysing soybean oil epoxidation.
APPLIED ORGANOMETALLIC CHEMISTRY
(2021)
Article
Energy & Fuels
Dayanne L. H. Maia, Fabiano A. N. Fernandes
Summary: This study investigated the production of epoxidized soybean oil using conventional and ultrasound-assisted methods. The results showed that the yield of epoxidized soybean oil exceeded 90% only when formic acid and sulfuric acid were used. The ultrasound-assisted method was the best option for obtaining a high purity product, although limitations of the ultrasound equipment need to be overcome.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Chemistry, Applied
Simin Mo, Qianwei Cheng, Xiaoli Wei, Yuan Cheng, Tong Chen, Luli Meng, Gao Ming, Kena Yu
Summary: Solid acid catalyst HPW/TiO2-SnO2-ZrO2 was successfully synthesized and characterized. The catalyst showed high efficiency and recyclability in the epoxidation of soybean oil (SBO). The relative conversion to oxirane in SBO increased to 85.08% at 2 hours, and the catalyst remained active after five cycles of use.
JOURNAL OF POROUS MATERIALS
(2023)
Article
Materials Science, Characterization & Testing
Shaojian He, Yuna Ai, Wenxu Dai, Shaoxiong Zhai, Hao Song, Jun Lin
Summary: Anchoring phosphotungstic acid (HPW) on insoluble inorganic fillers is an effective approach to suppress leakage in proton exchange membranes. Introducing beta-cyclodextrin (beta-CD) on halloysite nanotubes (HNTs) with polydopamine coating dispersed in SPEEK matrix anchors HPW and results in enhanced proton conductivity by providing more active sites for continuous proton transfer pathways.
Article
Engineering, Chemical
Chongfu Wu, Changsheng Chen, Zhaoyang Qi, Jie Chen, Qinglian Wang, Changshen Ye, Ting Qiu
Summary: The ultra-deep desulfurization of oil is an urgent task due to various problems such as environmental pollution and environmental protection requirements. Oxidative desulfurization (ODS) is considered the most promising technology, but the synthesis of highly efficient and stable HPW-based heterogeneous catalysts remains challenging. In this paper, a simple one-step method was used to prepare a PEHA-HPW heterogeneous catalyst for ultra-deep desulfurization of fuel oil. The composite material showed excellent catalytic activity and high recyclability.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Acoustics
Raquel S. Silva, Dayanne L. H. Maia, Fabiano A. N. Fernandes
Summary: The study demonstrates that ultrasound technology can effectively increase the yield of tung oil epoxy resin, with formic acid showing higher selectivity compared to acetic acid, which, however, generates valuable by-products.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Chemistry, Applied
Meng Zhang, Qianwei Cheng, Tong Chen, Xiaoli Wei, Luli Meng
Summary: A new hydraulic cavitation-assisted epoxidation scheme using a cost-effective, environment-friendly, and recyclable solid-acid catalyst has been developed. The prepared catalysts exhibit high stability and effective catalytic activity, with a large specific surface area and abundant acid sites. The scheme achieves a high conversion rate of oxirane in a short reaction time under optimal conditions, and the catalyst can be easily separated and reused multiple times.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Energy & Fuels
Ankita Sarkar, Parineeta Das, Ikbal Bahar Laskar, Sethumathavan Vadivel, Amrit Puzari, Bappi Paul
Summary: A green heterogeneous catalyst was synthesized using biomass Parkia speciosa via calcination at 700 degrees C for biodiesel synthesis. Characterization techniques were conducted to analyze the catalyst. The results showed that potassium and calcium oxides and carbonates served as active catalytic sites, resulting in high biodiesel yield. The catalyst remained efficient after five successive cycles, indicating its potential as an alternative for conventional homogeneous catalysts.
Article
Chemistry, Physical
Lorenzo Lisuzzo, Giuseppe Cavallaro, Stefana Milioto, Giuseppe Lazzara
Summary: The functionalization of halloysite with sodium alkylsulphates generated hydrophobic microdomains with enhanced microviscosity, leading to larger enhancements on the rate constant of the Belousov-Zhabotinsky (BZ) reaction. This study shows the potential of surfactant/halloysite hybrids as efficient and reusable nanocatalysts based on their unique microviscosity and polarity properties.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Agricultural Engineering
Dulu Brahma, Riu Riu Wary, Jugal Bori, Pranjal Kalita
Summary: A heterogeneous catalyst, MSnPTA, consisting of phosphotungstic acid (PTA) immobilized over SnO2 mesoporous material, was developed for fructose to HMF conversion. The MSnPTA catalyst exhibited large surface area and pore diameter, and its spherical shape with worm like structure facilitated the catalytic reaction. The uniform distribution of PTA over SnO2 resulted in high acidity of the catalyst, leading to high conversion of fructose to HMF. The yield of HMF increased with increasing amount of catalyst and temperature.
BIOMASS & BIOENERGY
(2023)
Article
Engineering, Chemical
Qiongna Xiao, Yuyan Jiang, Weiqiang Yuan, Jingjing Chen, Haohong Li, Huidong Zheng
Summary: This work synthesized a series of quaternary ammonium compounds with different cationic sizes and incorporated them with polyoxometalate anions to prepare phase transfer catalysts (PTCs) for styrene epoxidation. Among them, (MTOA)3PW4O24 exhibited the best catalytic activity with a styrene conversion rate of 52% and a styrene oxide selectivity of 93%. The deactivation mechanism of the PTCs was proposed, and this work is significant for the design of new PTCs in alkene epoxidation.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Guoxiao Cai, Susu Zhou, Fang Hao, Wei Xiong, Pingle Liu
Summary: The study showed that Ru and Mo bimetallic catalysts supported on carbon nanotubes improved glycerol hydrogenation performance, while the addition of phosphotungstate acid facilitated dehydration of glycerol molecules, chemical adsorption, and dissociation of hydrogen molecules.
Article
Energy & Fuels
Fatemeh Jangi, Nader Rahemi, Somaiyeh Allahyari
Summary: In this research, phosphotungstic acid (PTA) was impregnated on natural zeolites for oxidative desulfurization of dibenzothiophene (DBT). PTA-Ferr showed the highest DBT removal efficiency among the samples, with more than twice the removal rate compared to other samples.
PETROLEUM SCIENCE AND TECHNOLOGY
(2023)
Article
Agricultural Engineering
Abdus Sobhan, Varlika Ahirekar, Magdalene Hoff, Kasiviswanathan Muthukumarappan
Summary: The scientific community is focusing on developing high-value-added epoxidized soybean oil and green bio-based epoxy resins using sustainable resources. The goal is to produce low-cost, value-added, and bio-based epoxy resins from conventional soybean oils and commercialize the technology for chemical industries. The use of deep eutectic solvent catalysts in the synthesis of epoxidized soybean oil has shown improved carbon-carbon double bond conversion and selectivity. Novel bio-based epoxy resins catalyzed by these catalysts have also shown enhanced mechanical properties.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Agricultural Engineering
Mustafa Kalkandelen, Selahattin Yilmaz
Summary: Mesoporous heterogeneous catalysts were synthesized and evaluated for soybean oil epoxidation, exploring the performance of different materials and the effects of solvent and catalyst stability. The results showed that Nb-SBA-15 catalysts exhibited high activity and stability, but with low epoxide selectivity.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Chemistry, Physical
Qi-Wen Chen, Ze-Qing Guo, Jian-Ping Zhou
Summary: Multifunctional continuous solid solutions NFMTO-x were successfully synthesized via a one-step hydrothermal method by controlling the ratio of Mg and Fe. The NFMTO-x materials exhibited enhanced visible light response, effective adsorption and photocatalytic degradation of organic pollutants, CO2 methanation capability, and easy recyclability due to their magnetic properties. This research provides a significant multifunctional material for water purification.
APPLIED SURFACE SCIENCE
(2024)
Review
Chemistry, Physical
George E. Stan, Maziar Montazerian, Adam Shearer, Bryan W. Stuart, Francesco Baino, John C. Mauro, Jose M. F. Ferreira
Summary: Bioactive glasses have the ability to form strong bonds with tissues and release therapeutic ions. However, their biomechanical compatibility limits their use in load-bearing applications. The use of magnetron sputtering technology to fabricate BG coatings shows promise in improving their efficacy and potential for application.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zhaoxuan Wang, Zhicheng Yan, Zhigang Qi, Yu Feng, Qi Chen, Ziqi Song, Meng Huang, Peng Jia, Ki Buem Kim, Weimin Wang
Summary: The corrosion behavior of Fe-60 and Fe-83 ribbons in 0.6 M NaCl was studied. Fe-60 exhibited a local corrosion mode and formed a stable passivation film with higher corrosion resistance, while Fe-83 showed a combination of local and global corrosion modes and had lower corrosion resistance. Controlling the precipitation of nanocrystalline phases and increasing the POx content in the passivation film significantly improved the corrosion resistance of Fe-based glassy alloys.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Hao-Kai Peng, Sheng-Yen Zheng, Wei-Ning Kao, Ting-Chieh Lai, Kai-Sheun Lee, Yung- Hsien Wu
Summary: This study investigates the effects of high energy/fluence proton radiation on the performance of HfZrOx-based FeFETs memory with different Zr content. The results show that the characteristics of FeFETs are influenced by proton radiation, and the extent of the influence depends on the Zr content. FeFETs with 50% Zr content exhibit minimal changes in memory window and demonstrate good endurance and retention performance.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zongyi Yue, Guangyi Wang, Zengguang Huang, Sihua Zhong
Summary: In this study, AZO and ITO films were successfully tuned as excellent passivation layers for c-Si surfaces, achieving effective minority carrier lifetime and outstanding optical properties through the optimization of annealing temperature and interfacial silicon oxide.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Martin Hruska, Jan Kejzlar, Jaroslav Otta, Premysl Fitl, Michal Novotny, Jakub Cizek, Oksana Melikhova, Matej Micusik, Peter Machata, Martin Vrnata
Summary: This paper presents a detailed study on the hydrogen sensing capabilities of highly nanoporous black gold films. The films exhibit fast response and recovery times at low temperatures. Different levels of nanoporosity were prepared and tested to investigate the sensing properties, and it was found that nanoporous black gold is suitable for hydrogen sensing. The sensitivity of the film depends on its nanoporosity.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yupu Wang, Gaofeng Teng, Chun To Yiu, Junyi Zhu
Summary: In the study of BM-SCO and HSCO thin films, it was found that H vacancies tend to prefer sites near the external surface or oxygen vacancy channels (OVCs), while H interstitials prefer sites of oxygen on a layer that contains six-fold coordinated Co. These findings not only enrich the understanding of complex surface phenomena of defect formation but also provide an explanation for the reversibility during phase transformation.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jiafeng Lu, Linping Teng, Qinxiao Zhai, Chunhua Wang, Matthieu Lancry, Ye Dai, Xianglong Zeng
Summary: In this study, we achieved full control of fiber nanograting orientation by manipulating laser polarization, and tailored space variant fiber nanogratings, which expanded the diversity in fiber nanograting engineering.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yibo Liu, Yujie Tao, Yue Liu, Qi Sun, Qinrong Lin, Kexin Kang, Qinghua Zhang, Qingjie Sun
Summary: This study investigates the wettability of the Ti-Cu-Fe multi-metal system, specifically the wetting behaviors of CuSi3 droplets on TC4 and 304SS plates. The results show that the CO2 + Ar gas atmosphere significantly affects interfacial mass transfer, thus influencing the wettability of the systems.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jimei Liu, Fei Wang, Rong Guo, Yuqi Liu, Mengyu Zhang, Jaka Sunarso, Dong Liu
Summary: This study developed Co/MXene composites with anti-corrosion properties by varying the cobalt content. These composites exhibited remarkable electromagnetic absorption performance and high resistance to corrosion under various corrosive conditions. The study also revealed the mechanism of electron transfer from cobalt to MXene and the electromagnetic dissipation behavior originated from polarization loss alone.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Moujie Huang, Yongsong Ma, Jingbo Yang, Lingyun Xu, Hangqi Yang, Miao Wang, Xin Ma, Xin Xia, Junhao Yang, Deli Wang, Chuang Peng
Summary: Strong metal-support interactions (SMSIs) are important for enhancing catalytic activities and stability in thermal catalysis. This study demonstrates a method to create SMSIs in electrocatalysis using carbon nanotubes and Ru nanoparticles, resulting in excellent catalytic activity and stability.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Ravi Trivedi, Brinti Mondal, Nandini Garg, Brahmananda Chakraborty
Summary: This study explores the potential of biphenylene as a nanocarrier for the delivery of the anticancer drug cisplatin. It is found that biphenylene offers physical stability, rapid release rate, solubility, and bio-compatibilities compared to other nanocarriers. The adsorption of cisplatin on the surface of biphenylene involves charge transfer from cisplatin to biphenylene. The drug is shown to be released at body temperature in an acidic environment. Biphenylene also exhibits excellent cytotoxicity activity and cellular uptake of the drug. Overall, biphenylene shows promise as a potential nanocarrier for cisplatin delivery.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Hyun Jeong, Hyeong Chan Suh, Ga Hyun Cho, Rafael Salas-Montiel, Hayoung Ko, Ki Kang Kim, Mun Seok Jeong
Summary: In this study, a potential platform to enhance Raman scattering and increase the number of observable Raman modes in monolayer transition metal dichalcogenides (TMDs) was proposed. The platform consisted of large-scale arrays of gold micropillars (MPs), which were able to enhance the Raman intensity of TMDs and make difficult-to-detect Raman modes observable. The platform showed great industrial advantages and wide applicability due to its low cost, simple process, large controllable area, and short process time.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yasir Abbas, Shafqat Ali, Sajjad Ali, Waqar Azeem, Zareen Zuhra, Haoliang Wang, Mohamed Bououdina, Zhenzhong Sun
Summary: In this study, FeOx@SPNO-C core-shell nanospheres as a catalyst for degradation of sulfamethoxazole (SMX) were successfully synthesized. The synergistic interaction between FeOx and SPNO-C, high carbon charge density, and the presence of C = O groups and N/Fe-Nx sites were found to be key factors for the enhanced degradation of SMX.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Qiaoting Yang, Yuxiao Gong, Yan Qian, Zhou-Qing Xiao, Serge Cosnier, Xue-Ji Zhang, Robert S. Marks, Dan Shan
Summary: This study proposes a hierarchical confinement strategy to design Prussian blue nanoparticles (PB NPs) with satisfactory electrocatalytic ability and stability. The catalytic synthesis of PB NPs is achieved through a hydrothermal process, and the as-prepared PB@NH2MIL exhibits efficient electronic transmission and enhanced electrocatalytic properties.
APPLIED SURFACE SCIENCE
(2024)