Article
Chemistry, Physical
Jia Guo, Naeem Akram, Liugen Zhang, Wenlan Ma, Guangyao Wang, Yi Zhang, Ali Ahmad, Jide Wang
Summary: This study explores the use of Ag2O-modified CuO nanosheets as catalysts for visible-light-driven water oxidation reaction. The nanosheets exhibit robust catalytic efficiency and expand the utility in the visible region. The study offers useful guidance for developing difunctional water oxidation catalysts without photosensitizers.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Saadia Rashid Tariq, Zunaira Niaz, Ghayoor Abbass Chotana, Dildar Ahmad, Nazia Rafique
Summary: Ag2O/CuO composites were used as excellent catalysts for the photocatalytic degradation of the pesticide Imidacloprid. The composites showed a 92.3% degradation rate of Imidacloprid within 180 minutes. These catalysts were cost effective, stable, and reusable, making them a promising solution for eliminating Imidacloprid from the environment.
Article
Materials Science, Ceramics
Al-Zoha Warsi, Omima K. Hussien, Ayesha Iftikhar, Fatima Aziz, Dalal Alhashmialameer, Samy F. Mahmoud, Muhammad Farooq Warsi, Dalia I. Saleh
Summary: In this study, the photocatalytic degradation ability of Ag2O/CuO nanocomposite was investigated, revealing its efficient removal of colored and colorless dyes. By optimizing the preparation method, the nanocomposite exhibited higher degradation efficiency compared to individual metal oxides. The results demonstrate that the synthesized nanocomposite has tremendous potential for degrading toxic pollutants in a short period of time.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Xin Yu, Tingke Jin, Huiqiang Wang, Guoqing Zhang, Wenlong Jia, Lincai Peng, Yong Sun, Xing Tang, Xianhai Zeng, Shuliang Yang, Zheng Li, Feng Xu, Lu Lin
Summary: A cost-effective and sustainable catalyst system based on Mn-Cu bimetallic oxides was found to be highly efficient for the selective oxidation of furfural to furancarboxylic acid. The incorporation of CuO into the Mn-Cu oxides weakened the Mn-O bonds, resulting in improved catalytic activity. The study provides insights into the relationship between the morphology, surface chemistry, and catalytic activity of Mn-Cu bimetallic oxides.
GREEN ENERGY & ENVIRONMENT
(2023)
Article
Chemistry, Multidisciplinary
Wei Gong, Jingcheng Liu, Yingang Gui, Heqing Huang
Summary: This study analyzed the gas sensitivity of Ag2O/CuO-modified SnS2 based on density functional theory, finding that NH3, Cl-2, and C2H2 gases were chemisorbed on the modified SnS2 surfaces, with Ag2O-SnS2 suitable as an NH3 gas sensor and CuO-SnS2 more suitable as a C2H2 gas sensor.
Article
Chemistry, Physical
Akihiro Nomoto, Tomoya Okada, Yuki Yamamoto, Shota Kuroda, Kuniaki Marui, Mika Yamamoto, Hidetaka Tsujimoto, Michio Ueshima, Tamotsu Nishigahana, Keiji Itoh, Gohei Kobata, Shintaro Kodama, Akiya Ogawa
Summary: The synthesis of Acid Blue 7 dye using a catalytic oxidation reaction with polyoxometalate catalyst and hydrogen peroxide in water was evaluated as a viable method to reduce the usage of harmful heavy metal oxidants. The reaction successfully produced Acid Blue 7 from the corresponding leuco acid at 95 degrees C in 45 minutes, demonstrating promising applications for 10 g-scale synthesis.
Article
Energy & Fuels
M. A. Armenta, Luis H. Alvarez, V. M. Maytorena, D. A. Buentello-Montoya, R. Silva-Rodrigo, A. Olivas, L. A. Flores-Sanchez
Summary: The wet impregnation method was used to support Ag2O, CuO, and Ag2O-CuO nanoparticles on gamma-chi-Al2O3 to evaluate their catalytic capabilities in the methanol dehydration (MD) reaction for dimethyl ether (DME) production. The Ag2O-CuO/gamma-chi-Al2O3 catalyst showed high catalytic activity and stability.
Article
Environmental Sciences
Sakthivel Thangavel, Parthiban Pazhamalai, Karthikeyan Krishnamoorthy, Yuvaraj Sivalingam, Durairaj Arulappan, Vigneshwaran Mohan, Sang-Jae Kim, Gunasekaran Venugopal
Summary: Piezo-photocatalysis is a novel approach that utilizes nanohybrids consisting of piezoelectric and photocatalytic materials to enhance advanced oxidation processes under both light and mechanical energy. This study investigates the efficiency of piezo-photocatalysis in the degradation of Rhodamine-B dye and Phenol pollutants using ferroelectric-semiconductor nanohybrids (BaTiO3-Ag2O). By activating persulfate and examining the role of free radicals using quenchers, the authors confirm the improved performance of piezo-photocatalysis. The study also reveals the removal mechanism of Rhodamine-B using HPLC and EPR techniques. Overall, combining piezo-photocatalysis with persulfate activation offers a promising strategy for effectively treating complex molecular pollutants in industrial wastewater.
Article
Engineering, Environmental
Naeem Akram, Jia Guo, Yuan Guo, Yuli Kou, Humbul Suleman, Jide Wang
Summary: Visible-light photocatalysis using Ag2O/CuO bimetallic catalyst showed efficient degradation of Congo Red, Rhodamine-B, and Methyl Orange dyes. The catalyst exhibited superior performance without the need for additional persulfate, with SO4 center dot- and HO center dot radicals identified as influential during the degradation process. Ag2O/CuO catalyst was easily recyclable and maintained high photocatalytic efficiency even after 5 consecutive cycles, making it a promising alternative for large-scale organic pollutant detoxification.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Zhenhua Zhang, Liping Fan, Weiqi Liao, Feiyue Zhao, Cen Tang, Jing Zhang, Ming Feng, Ji-Qing Lu
Summary: By studying the CO oxidation catalyzed by CeO2-CuO/Cu2O nanocomposites with different CuO structures, it was found that the CuO-CeO2 interfaces in the CeO2-CuO/c-Cu2O (cubes) nanocomposites exhibit higher intrinsic activity, indicating that the active oxygen species originates from CuO. An active 13.2% CeO2-CuO/c-Cu2O(s) catalyst for CO oxidation was achieved on fine Cu2O cubes, possessing a high density of active sites.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Monica Pandey, Monika Singh, Kirti Wasnik, Shubhra Gupta, Sukanya Patra, Prem Shankar Gupta, Divya Pareek, Nyshadham Sai Naga Chaitanya, Somedutta Maity, Aramati B. M. Reddy, Ragini Tilak, Pradip Paik
Summary: In this study, mesoporous composite nanoparticles were synthesized and found to exhibit excellent antimicrobial activity against bacteria and fungi. Through computational docking methods, the interactions between the nanoparticles and microorganism-specific proteins were identified to explain their effectiveness. The composite nanoparticles show promise as stable inorganic antibiotics for use in healthcare technologies.
Article
Nanoscience & Nanotechnology
Yingang Gui, Pingan Luo, Chang Ji, Yuhang Lin, Xianping Chen
Summary: Based on first principles calculations, Ag2O- and CuO-modified MoSe2 nano sheets were found to have good adsorption performance for C6H6 and HCHO, with Ag2O-MoSe2 nano sheets exhibiting higher adsorption stability.
ACS APPLIED NANO MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Biswajit Parhi, Debasrita Bharatiya, Sarat K. Swain
Summary: This study focuses on the dielectric properties of a ternary nanocomposite (GO-CuO/Ag2O) prepared by sol-gel technique, without the use of surfactants, organic solvents, catalysts, or harmful chemicals. The permittivity and dielectric parameters were measured at different frequencies and temperatures. The highest permittivity was observed at 200°C due to the presence of oxygen functionalities and structural defects caused by the pyrolysis of graphene oxide. The nanocomposite exhibited high ac electrical conductivity, indicating its potential for applications in power electronics and energy storage.
JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Nanoscience & Nanotechnology
Lingyi Han, Lan Yang, Yalan Liu, Hanyu Li, Shantang Liu
Summary: In this study, well-defined hierarchical NiZnx@CuO nanoarray architectures were synthesized and evaluated as efficient electrocatalysts for methanol oxidation reaction (MOR) in alkaline media. The NiZn1000@CuO electrode exhibited a high current density of 449.3 mA cm-2 at 0.8 V for MOR and maintained 92% stability after 12 hours. The excellent catalytic performance was attributed to the hierarchical structure, which provided abundant active sites, enhanced electrocatalytic activity, and facilitated mass and electron transport. The leaching of Zn atoms from the NiZn alloy also resulted in rough surface nanorods, increasing the specific surface area.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Kai Cheng, Songjian Zhao, Jiazheng Ren, Haoran Li, Yongsheng Chen
Summary: Experimental evidence shows that CO2 desorption is the rate-determining step in Cu-based catalysts for CO oxidation, and using CeO2 as a support can accelerate CO2 desorption to improve catalytic activity.
