Article
Engineering, Chemical
Liangfu Li, Sirui Li, Yiming Dong, Ping Yang, Runkai Wang
Summary: Deep treatment of sulfuric-acid-titanium-dioxide wastewater using UF/RO can meet water quality requirements, reduce pollutant discharge, and conserve water resources.
Article
Biochemistry & Molecular Biology
Xiaorong Dong, Xue Liang, Yuting Zhou, Kaiwen Bao, Dur E. Sameen, Saeed Ahmed, Jianwu Dai, Wen Qin, Yaowen Liu
Summary: The addition of TiO2 NPs and GO significantly improved the mechanical properties and antibacterial properties of PLA nano-fibrous films. The nano-fibrous films showed enhanced water barrier properties and inhibited the growth of bacteria effectively.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Engineering, Electrical & Electronic
Congxue Tian
Summary: The induced water volume ratio and hydrolysis time have significant impacts on the purity and particle characteristics of TiO2. By optimizing these two factors, high purity and monodisperse titanium dioxide can be obtained.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Metallurgy & Metallurgical Engineering
Jianfa Jing, Yufeng Guo, Feng Chen, Shuai Wang, Lingzhi Yang
Summary: This study proposes a novel process to prepare boiling chlorinated charges from modified titanium slag, which includes sulfuric acid leaching, hydrochloric acid leaching, and removing silica from the hydrochloric acid leach residue. The leaching efficiencies of various elements were systematically investigated and achieved acceptable results. The product obtained in this process meets the requirements of the chemical compositions for boiling chlorinated charge.
Article
Multidisciplinary Sciences
Peng Zhang, Tianzeng Chen, Qingxin Ma, Biwu Chu, Yonghong Wang, Yujing Mu, Yunbo Yu, Hong He
Summary: This study investigates the conversion of SO2 on diesel soot under light irradiation. The results show that the presence of soot can promote the conversion of SO2 to H2SO4 through the reaction with photo-induced OH radicals. The formation of OH radicals is related to the electron transfer in soot and the generation of reactive superoxide radicals.
NATURE COMMUNICATIONS
(2022)
Article
Engineering, Chemical
Mingzhi Luo, Guoquan Zhang, Yuguo Fang, Lingzhuo Cao, Zhanbo Guo, Kun Wang, Jia Li
Summary: This article presents a two-step synthesis method for synthesizing calcium carbonate using ammonium carbonate and calcium chloride as raw materials. The pH of the mineralized solution was studied under different factors, such as temperature and ammonium carbonate concentration. The results showed that increasing the temperature promoted the formation of submicron calcite type calcium carbonate, while changing the concentration of ammonium carbonate had little effect on the crystal phase and size of the product.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Mohammad Hasan Sadeghi, Mohsen Nasr Esfahany
Summary: The current research aimed to develop a safer and more environmentally friendly sulfate process for producing titanium oxide. This process involves a two-step leaching scheme using different reactors for chemical reaction and particle activation, resulting in reduced waste acid and gypsum production and economic profit.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
E. Huttunen-Saarivirta, E. Isotahdon, M. Lindgren, A. Mardoukhi, P. Mocnik, T. Kosec, J. B. Jorcin, S. Hagg Mameng, Y. El Ouazari, L. Wegrelius
Summary: This study investigates the corrosion behavior of three stainless steel grades under different concentrations of sulfuric acid and sodium chloride. The results show that pitting corrosion occurs in 1 wt% sulfuric acid, while uniform corrosion dominates in 10 wt% sulfuric acid. The chloride-to-sulfate activity ratio is found to be the key parameter in determining the occurrence of pitting corrosion.
Article
Electrochemistry
Luca Casanova, Marcello La Padula, MariaPia Pedeferri, Maria Vittoria Diamanti, Marco Ormellese
Summary: This study investigates the influence of frequency and amount of cathodic polarization on the characteristics of oxide coatings during bipolar pulsed plasma electrolytic oxidation. By choosing high frequency and a specific negative-to-positive charge ratio, the growth of coatings optimized for corrosion resistance in concentrated sulfuric acid can be promoted; whereas low frequency and less cathodic polarization should be used to enhance localized corrosion resistance.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Multidisciplinary
Enyonam Ahadzi, M. S. Ramyashree, S. Shanmuga Priya, K. Sudhakar, Muhammad Tahir
Summary: This study focuses on the conversion of CO2 to fuel through photocatalysis, with process modeling, simulation, and energy analysis conducted to optimize conditions. The agreement between simulated and predicted values supports the use of mathematical modeling for predicting CO2 conversion and methanol yield.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2021)
Article
Materials Science, Multidisciplinary
Amin Imani, Edouard Asselin
Summary: The corrosion resistance of Ti-45Nb decreases with increasing fluoride concentrations in fluoride-containing H2SO4 solutions, as shown by electrochemical measurements and surface profilometry.
Article
Chemistry, Physical
Aneta Lewkowicz, Mattia Pierpaoli, Katarzyna Walczewska-Szewc, Martyna Czarnomska, Piotr Bojarski, Robert Bogdanowicz, Stanislaw Pogorzelski, Leszek Kulak, Jakub Karczewski
Summary: Organic aggregates play a significant role in optoelectronic properties, which are related to their structure and molecular packing. While traditional H and J aggregates are well-established, unconventional aggregates, especially aggregation-induced emission (AIE) systems, have recently gained attention. This study discusses the effect of unconventional aggregation and dye concentration on the surface energy characteristics of materials.
Article
Chemistry, Multidisciplinary
Stoja Milovanovic, Ivana Lukic, Piotr Kaminski, Agnieszka Debczak, Kamila Klimkowska, Katarzyna Tyskiewicz, Marcin Konkol
Summary: The study aimed to investigate the factors influencing oil extraction from milk thistle using supercritical CO2 as a green solvent. The effects of plant origin, cultivation year, seeds storage, high-pressure unit design, and initial plant material amount were examined. The results showed that adjusting the supercritical CO2 extraction parameters could improve the recovery of essential fatty acids and phenolic compounds, and the solid residues could be used for waste valorization.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Biochemistry & Molecular Biology
Marius Stoian, Andrei Kuncser, Florentina Neatu, Mihaela Florea, Marcela Popa, Sorina N. Voicu, Mariana C. Chifiriuc, Anamaria Hanganu, Maria Elena Anghel, Madalina Tudose
Summary: This article presents the first efficient and environmentally friendly chemical reduction method for synthesizing aminated hyaluronic acid-based silver nanoparticles on the modified surface of titanium dioxide nanoparticles for biological applications. The study investigates the effect of nanoparticle size and chemical composition on the obtained materials and evaluates the antimicrobial, antioxidant, and anti-inflammatory activity of the fabricated composites.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Engineering, Chemical
Jingwei Kou, Houle Xiang, Zhen Zhang, Jing Zhang, Guiqin Wang, Kun Dai, Pengpeng Yang, Wei Zhuang, Hanjie Ying, Jinglan Wu
Summary: Ion exclusion chromatography is an efficient technique for separating different electrolytes and non-electrolytes. This study focused on evaluating the mass transfer and separation mechanism of H2SO4 and Al-2(SO4)(3) on an anion exchange resin. The Donnan equilibrium played a significant role in the mass transfer process, where the co-ion (Al3+) was unable to pass through the Donnan membrane while the counterion (SO42-) was able to enter the resin pores. A column model based on Donnan equilibrium and cooperative adsorption isotherm successfully predicted the concentration profiles of mixed ions at the outlet of the fixed-bed. The study also investigated the influence of different valence states of metal ions on the concentration of H2SO4 to further verify the Donnan effect.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
