Article
Engineering, Chemical
Andrea Petrella, Danilo Spasiano, Pinalysa Cosma, Vito Rizzi, Marco Race, Maria Cristina Mascolo, Ezio Ranieri
Summary: The photo-catalytic degradation of a textile azo-dye Methyl Orange was studied in an innovative unit with a titanium dioxide catalyst layer, activated by UVB irradiation. Various parameters such as TiO2 dosage, dye concentration, pH, flow-rate, hydraulic load, and irradiation power were found to influence degradation rates. An increase in flow rate led to higher degradation kinetics, while further increase associated with modification of hydraulic load resulted in lower rates. Additionally, the kinetic rates increased with higher UVB intensity.
Article
Engineering, Environmental
Zhengfei Yu, Xifeng Chen, Yibo Zhang, Hongyu Tu, Pen Pan, Shuai Li, Yuxiang Han, Minjun Piao, Jianglei Hu, Fengwei Shi, Xia Yang
Summary: In a phosphotungstic acid aqueous solution, HPW/OMS-SO3H with ordered mesoporous structure was successfully prepared via a one-pot co-condensation method, showing promising catalytic activity for biodiesel production. The catalyst exhibited excellent performance due to the synergistic effect between HPW and propylsulfonic acid groups, with a biodiesel yield of 95.3% achieved under optimal conditions. The strong interaction between components also prevented significant performance loss after multiple reuse cycles.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Minmin Zou, Ming Dong, Mingliang Luo, Hexin Zhu, Tian Zhao
Summary: Hierarchically porous MIL-101(Cr) prepared via nanofusion process showed higher adsorption capability and catalytic efficiency, leading to improved performance in certain reactions.
Article
Biochemistry & Molecular Biology
Wei Mao, Jiawen Hao, Lingyu Zeng, Hao Wang, Hao Xu, Jinghong Zhou
Summary: In this study, bimetal-organic frameworks (BMOFs) with both Bronsted and Lewis acidities were synthesized by encapsulating phosphotungstic acid (PTA) in BMOFs. The catalyst efficiently converts starch to 5-hydroxymethyl-furfural (HMF) in deep eutectic solvents (DESs) such as choline chloride and formic acid. Using a DES as a cocatalyst and solvent reduces the use of organic solvents and the catalyst shows good reusability.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Yi-Tzu Lin, Jingling Yang, Chung-Yuan Mou
Summary: A nano-confined catalytic system incorporating ultrasmall Au nanoparticles and highly dispersed phosphotungstic acid was demonstrated to efficiently convert glycerol to formic acid with a selectivity of up to 79.2%. This system offers potential for commercial application in converting glycerol to formic acid.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Applied
Ali K. Ilunga, Bhekie B. Mamba, Thabo T. I. Nkambule
Summary: In this study, platinum nanoparticles were synthesized and stabilized by polyvinylpyrrolidone through a thermal reduction method, with an average size of 2.53 nm and stability for over 3 months. Mesoporous iron oxide material was synthesized using a sol-gel-based inverse micelle strategy, and colloidal platinum nanoparticles were deposited on it, leading to a significant decrease in activation energy compared to the colloidal platinum nanocatalysts.
APPLIED ORGANOMETALLIC CHEMISTRY
(2021)
Article
Engineering, Chemical
Paula Sfirloaga, Madalina-Gabriela Ivanovici, Maria Poienar, Catalin Ianasi, Paulina Vlazan
Summary: LaMnO3 and different doping ions of perovskite type nanomaterials were synthesized by the sol-gel method. The crystal structures of the doped materials were changed and the Ag-doped samples showed slightly better catalytic activity in methyl orange removal.
Article
Materials Science, Multidisciplinary
Xiaodong Cui, Zhiyu Guo, Hua Lei, Xuchao Jia, Chenyue Mao, Lujie Ruan, Xiaoyuan Zhou, Zhu Wang, Feng Chen, Wanping Chen
Summary: Coating silicon single crystals on the bottom of glass beakers has been found to be an effective method for regulating tribo-catalytic reactions. Through friction between alumina and silicon during magnetic stirring, hydroxyl and superoxide radicals are formed, which can degrade methyl orange solutions.
Article
Green & Sustainable Science & Technology
Bo Sun, Jie Zhang, Maolin Wang, Shixiang Yu, Yao Xu, Shuheng Tian, Zirui Gao, Dequan Xiao, Guosheng Liu, Wu Zhou, Meng Wang, Ding Ma
Summary: The authors developed a two-step catalytic process to convert PLA into methyl methacrylate, achieving sustainable valorization of waste PLA and reducing CO2 emissions.
NATURE SUSTAINABILITY
(2023)
Article
Environmental Sciences
Saeedeh Shahbazkhany, Mehdi Salehi, Mehdi Mousavi-Kamazani, Zohreh Salarvand
Summary: Three photocatalyst-adsorbents were synthesized using hydrothermal method, with Zn0.94Mn0.06O showing the highest decolorization efficiency and adsorption capacity, a band-gap of 2.89 eV, and the adsorption mechanism investigated through BET analysis and zeta potential.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Physical
Simona Filice, Corrado Bongiorno, Sebania Libertino, Leon Gradon, Daniela Iannazzo, Silvia Scalese
Summary: The Fenton reaction plays a crucial role in water and soil remediation, but drawbacks such as the use of H2O2 and iron salts can be avoided by using acid-treated natural clay as a heterogeneous catalyst. This process effectively degrades organic contaminants in water under UV irradiation without the need for hydrogen peroxide, offering a new route for remediation of water contaminated with biologically active organic substances.
Article
Environmental Sciences
Zhong-Yue Chang, Zi-Yang Wang, Rui Zhang, Lei Yu
Summary: In this study, coupling n-type semiconductor perylene diimide (PDI) with biodegradation was found to significantly enhance the biotic decolorization and mineralization of methyl orange, with the generation of free radicals identified as a key factor in accelerating the process. The study provides insights into the synergistic mechanism of microbial and photocatalytic action, offering a feasible approach for the combination of biodegradation and photocatalysis for azo dyes.
Article
Chemistry, Physical
Muhammad Ishfaq, Muhammad Aadil, Syeda Rabia Ejaz, Warda Hassan, Nadia Masaya Panduro-Tenazoa, Mohamed E. El Sayed, Mohammad N. Murshed, Zeinhom M. El-Bahy
Summary: In this study, a copper and bismuth co-doped CeO2 nanostructure was synthesized using subcritical hydrothermal method for water remediation application. The co-doping of copper and bismuth synergistically improved the conductivity and light-harvesting capabilities of the co-doped CeO2, as confirmed through current-voltage and optical studies. The microstructural, compositional, and morphological information of the photocatalyst were analyzed using powder XRD and spectroscopic techniques. The as-prepared co-doped CeO2-based photocatalyst demonstrated efficient mineralization of the anionic dye methyl orange under solar irradiation, outperforming a CeO2 photocatalyst in terms of effectiveness and rate of dye mineralization. The co-doped CeO2 photocatalyst also exhibited excellent robustness and retained its photocatalytic activity after multiple reusability tests.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Nan Dai, Shuang Yi, Xiaotian Zhang, Li Feng, Hui Ding, Dan Song, Xiaoying Liu, Jinsong Rao, Yuxin Zhang
Summary: A typical adsorption modification method was used to load ferrous ions onto the Laponite@diatomite composite, creating a catalyst with good photo-Fenton performance. The study found that the catalyst can effectively degrade cationic dyes under optimal reaction conditions, and exhibits structural stability and reusability.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Zhengfei Yu, Linlong Zhang, Yuxiang Han, Shuai Li, Jianglei Hu, Fengwei Shi
Summary: The thick pore walls of ordered mesoporous silica supported HPW materials were prepared without traditional hydrochloric acid, showing higher efficiency and easier recycling compared to traditional materials synthesized in hydrochloric acid solution.
