Article
Chemistry, Applied
Ai-Jun Xie, Dong-Jin Lee, Seung-Taik Lim
Summary: The study found that hydrolyzed resistant dextrins (RD) exhibited higher crystallinity and thermal stability compared to unhydrolyzed RD, with increased resistance to enzyme digestion. However, RD crystals tended to aggregate during drying, and heating reduced the enzyme-resistant fraction while hydrolysis increased it. Hydrolysis can be a useful method to prepare nano-sized RD with enhanced crystallinity and resistance to digestion.
FOOD HYDROCOLLOIDS
(2021)
Article
Materials Science, Multidisciplinary
Jingcheng He, Qingju Liu, Yumin Zhang, Xinbo Zhao, Genlin Zhang, Bin Xiao, Kaixin Fu
Summary: In this study, C-TiO2 microspheres were synthesized using microwave-assisted solvothermal method and low-temperature heat treatment. The samples with different carbon content were obtained by varying the heat treatment temperatures. Characterization results showed that C-TiO2 samples consisted exclusively of anatase crystallites, and interstitial carbon and surface carbonate species were confirmed to be present, which significantly enhanced the photocatalytic activity under visible light. The degradation efficiency of methylene blue (40 mg/L, 200 mg catalyst) and methyl orange (10 mg/L, 100 mg catalyst) reached 92.59% and 98.42%, respectively, after 60 min of visible light irradiation at 5 W, which were significantly higher than those of commercial titania P25 (5.74% and 24.53%, respectively). Moreover, the sample exhibited excellent recyclability and stability, making it a novel and feasible approach for visible light-driven titania photodegradation modification.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Energy & Fuels
Jiuqing Liu, Cheng Wang, Qihou Li, Jie Li, Ya Chen, Feifei Song, Zikun Hong, Meng Liu, Lishun Bai, Fanli Zeng
Summary: By improving the structure of the separator and adding electrolyte additives, the performance of lithium-oxygen batteries has been significantly enhanced, leading to longer cycle life and more stable performance.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Environmental Sciences
Haiqin Zhang, Jichi Bai, Weifeng Xue, Yang Xue, Ya'nan Zhang
Summary: Temperature and pH are important factors affecting the hydrolysis of beta-lactam antibiotics in water environments. An equation was employed to correct the Gibbs energy calculated in aqueous solutions to predict the effect of temperature on the hydrolysis kinetics and pathways of penicillin G. The predicted rate constants were of the same order of magnitude as the experimental values obtained under comparable pH and temperature conditions. The quantum chemical methodology described in this study has the potential to determine pH- and temperature-based two-dimensional hydrolysis rate models for predicting the persistence of beta-lactam antibiotics in cold waters.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Applied
Marwa N. El-Nahass, Mahmoud M. Youssif, Hosny A. El-Daly, Tarek A. Fayed
Summary: This study aimed to develop a simple, colorimetric, and low-cost optical sensor for the high selective and sensitive detection of metal ions. A novel benzothiazole azo-dye was synthesized and anchored into amino-functionalized mesoporous TiO2 to create nanosensors. The nanosensors exhibited significant changes in colors, absorption and emission spectra when exposed to different metal ions. The binding constants and limit of detection (LOD) were calculated, and the results showed that the nanosensors had stronger binding affinity, selectivity, sensitivity, and lower LODs compared to the azo-dye.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Ibraheem A. Mkhalid, Adel A. Ismail, Mahmoud A. Hussein, Raed H. M. Al Thomali
Summary: Novel MnCo2O4 nanoparticles (NPs) supported on porous TiO2 networks were prepared for tetracycline (TC) degradation. The photocatalytic activity of the MnCo2O4/TiO2 nanocomposite was significantly higher than that of TiO2 NPs and P-25, with a degradation rate of 100% within 60 minutes.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Materials Science, Coatings & Films
Tomas Krenek, Theresia Stich, Denitsa Docheva, Petr Mikysek, Martin Kostejn, Vera Jandova, Radek Fajgar, Michal Pola, Tomas Kovarik, Denys Moskal, Jana Forejtova, Josef Pola
Summary: This study characterizes the hydrolytic stability and impact of CaTiO3 coats on various substrates in air and aquatic media. The study also evaluates the effects of these coats on human mesenchymal stem cells. It emphasizes the importance of considering the hydrolysis phenomenon when interpreting the properties of CaTiO3 surfaces.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Physical
Dimitrios A. Giannakoudakis, Abdul Qayyum, Mariusz Barczak, Ramon Fernando Colemenars Quintero, Piotr Borowski, Konstantinos Triantafyllidis, Juan Carlos Colmenares
Summary: Selective partial oxidation of benzyl alcohol to benzaldehyde without additives was achieved using advantageous titanium oxide nano-photocatalysts. Titanate nanotubes and nanocores of anatase surrounded by amorphous titanium hydroxide phase performed the best. Different mechanisms and oxidation pathways are photo-catalyzed depending on the physicochemical features of the nanocatalysts and the light irradiation. The study also revealed that utilizing organic compounds like benzoquinone as scavenger may result in photolytic decomposition.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Materials Science, Multidisciplinary
Woori Ko, Shufang Zhao, Ketack Kim, Young Dok Kim, Hyun Ook Seo
Summary: Mesoporous anatase TiO2 particles with high surface area were prepared and annealed at different temperatures to obtain three different TiO2 particles. The 200-TiO2 showed the highest and most stable photocatalytic activity for toluene degradation due to its mesoporosity and high surface area. The formation of benzoic acid on its surface during toluene oxidation can be decomposed into CO2 under UV light irradiations, making the 200-TiO2 resistant to the accumulation of recalcitrant reaction intermediates.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Thermodynamics
Jean-Maxime Orlac'h, Nasser Darabiha, Sebastien Candel, Denis Veynante, Benedetta Franzelli
Summary: The synthesis of TiO2 in TiCl4-seeded flames is often described using phenomenological models, which qualitatively reproduce experimental trends but lack chemical insights into the kinetic pathways. Alternatively, thermodynamically-consistent oxidation kinetics of TiCl4 have been developed, but their applicability to flame synthesis needs to be assessed considering the presence of water molecules. This article presents numerical simulations of TiO2 flame synthesis, incorporating different chemical descriptions of TiCl4 conversion. Detailed oxidation kinetics without hydrolysis predict slow TiO2 formation at low O2 concentrations, leading to an underestimation of conversion yield. A new scheme combining detailed oxidation kinetics with a mechanism for TiCl4 hydrolysis is proposed, resulting in faster and more efficient TiCl4 conversion and log-normal particle size distributions that agree with experimental data for flame synthesis of nanoparticles.
COMBUSTION AND FLAME
(2023)
Article
Agricultural Engineering
Lin Dai, Yuanjie Gu, Jing Xu, Jianming Guo, Kankan Jiang, Xin Zhou, Yong Xu
Summary: This study explored the pretreatment of sorghum straw using gluconic acid, which effectively enhances the value of hemicellulose and cellulose and enables the production of xylooligosaccharides and glucose.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Electrochemistry
Peng Xie, Zhenping Liu, Shuqing Huang, Jiamei Chen, Yu Yan, Na Li, Minmin Zhang, Mingliang Jin, Lingling Shui
Summary: In this study, a sensitive and reusable electrochemical sensor based on wrinkled mesoporous carbon nanomaterials was developed for the assay of 17 beta-estradiol. The sensor exhibited high sensitivity, selectivity, reproducibility, and validated recoverability, showing great potential for the determination of endocrine disrupting chemicals.
ELECTROCHIMICA ACTA
(2022)
Article
Materials Science, Paper & Wood
J. Tetreault, D. Vedoy, P. Begin, S. Paris Lacombe, A. -l. Dupont
Summary: This research estimated the rate of degradation of paper and developed a kinetic degradation model. The study found that the activation energy and pH had significant influences on the decay of paper, with alkaline papers and acidic papers with good printing quality being more durable.
Article
Chemistry, Physical
Sirikorn Suriyawong, Jeerawan Khumphon, Ramida Rattanakam, Pakvipar Chaopanich, Sirikanjana Thongmee, Saran Youngjan, Pongtanawat Khemthong, Sutasinee Kityakarn
Summary: This study developed a hierarchical three-dimensional ordered mesostructured (3DOM) TiO2 with designed morphology and pore orientation for NH3 gas detection at room temperature. The optimized 3DOM TiO2 structure demonstrated a low detection limit of NH3 gas sensing under ambient conditions.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Physical
Fanjun Meng, Yujie Ling, Yuzhen Li, Di Liu, Kunze Wei, Liwen Sun, Zibin Sang
Summary: In this study, solid waste red mud (RM) was used as a raw material to obtain a TiO2/RM composite with excellent performance in removing tetracycline hydrochloride (TC) under visible light. The modified catalysts showed a narrow band gap similar to that of RM, improved photocurrent response, low electron transfer resistance, and promoted carrier separation. Moreover, the catalysts exhibited high anti-interference ability and long-term stability in the photocatalysis process.
SURFACES AND INTERFACES
(2022)
