Article
Materials Science, Multidisciplinary
Adel A. Ismail, Soad Z. Alsheheri, Soha M. Albukhari, M. H. H. Mahmoud
Summary: A novel green procedure was developed to synthesize mesoporous Ag2O/Fe-2(MoO4)(3) nanocomposites for the photodegradation of tetracycline. The nanocomposites exhibited excellent photocatalytic performance, enhanced rate constant values, and promising stability and recyclability, making them a potential candidate for environmental remediation applications.
Article
Chemistry, Physical
Meysam Habibi, Aziz Habibi-Yangjeh, Shima Rahim Pouran, Cailing Xu, Chundong Wang
Summary: The study focused on the synthesis of ZnO/Bi4O5Br2 via a hydrothermal route and its substantial ability to activate peroxodisulfate. Various characterization analyses were conducted to study the photocatalysts' structure, morphology, optical, electrochemical, and surface properties. Results showed that ZnO/Bi4O5Br2 had significantly higher photocatalytic activity compared to other systems due to factors such as charge segregation, synergistic impact of PDS ions, extended surface area, and reduced charge transfer resistance.
SURFACES AND INTERFACES
(2022)
Article
Environmental Sciences
Siva Chidambaram, Mohan Kumar Ganesan, Muthusamy Sivakumar, Saravanan Pandiaraj, Muthumareeswaran Muthuramamoorthy, Santhosh Basavarajappa, Abdulaziz Abdullah Al-Kheraif, M. L. Aruna Kumari, Andrews Nirmala Grace
Summary: The integration of semiconducting nanostructures with noble metal nanoparticles is increasingly favored for cost efficient energy and environmental applications. A facile aqueous synthesis method was reported to produce polymer-capped gold nanoparticles on free-standing 2D layered zinc oxide structures, resulting in ZnO/Au nanocomposites. The study found that the concentration of Au nanoparticles promoted the preferential growth of ZnO along the (002) wurtzite plane, with the resulting structures exhibiting improved absorptivity along the visible spectrum.
Article
Chemistry, Physical
Ruiqi Gang, Yi Xia, Lei Xu, Libo Zhang, Shaohua Ju, Zemin Wang, Sivasankar Koppala
Summary: Ag-decorated TiO2 plasmonic photocatalysts were successfully fabricated using a facile method. The TiO2/Ag samples exhibited higher photodegradation efficiency and superior stability, which was attributed to the surface plasmon resonance effect and enhanced visible light absorption of Ag nanoparticles. A possible mechanism for the degradation of tetracycline by TiO2/Ag nanocomposites was proposed.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Physical
Joana L. Lopes, Ana C. Estrada, Sara Fateixa, Nikolai A. Sobolev, Ana L. Daniel-da-Silva, Tito Trindade
Summary: This research focuses on finding a green chemical strategy to enhance the sustainability of bismuth vanadate for photocatalytic water purification. By hydrothermal carbonization of kappa-carrageenan, a biopolymer derived from red seaweeds, monoclinic BiVO4 supported on carbon spheres is successfully prepared. These hybrid materials exhibit visible-light photocatalytic activity for the removal of tetracycline in water. They possess appropriate wavelength range for photon absorption, good adsorption capacity, durability, and the ability to be reused in subsequent catalytic steps, making them cost-effective and sustainable.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Engineering, Environmental
Qi Yang, Chang -Wei Bai, Yi-Jiao Sun, Yu-Jie Liu, Kun-Jie Hou, Fei Chen
Summary: In this study, a visible-light-responsive Bi2WO6/Fe2O3 heterojunction photocatalyst was synthesized, which improved the ability of Fe2O3 to activate peroxydisulfate (PDS). Under the conditions of 0.3 g/L PDS and 0.3 g/L catalyst, rapid tetracycline removal (91.7% within 60 min) was achieved in the Bi2WO6/Fe2O3/PDS/visible light system, with a corresponding pseudo-first-order rate constant of 4.16 x 10-2 min-1, which was significantly higher than those of the Bi2WO6/Fe2O3/visible light and Bi2WO6/Fe2O3/PDS systems.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Alejandro Bembibre, Majdi Benamara, Mokhtar Hjiri, Elvira Gomez, Hatem R. Alamri, Ramzi Dhahri, Albert Serra
Summary: The study explores the efficient mineralization of tetracycline antibiotics using Ca-doped ZnO nanopowders under LED visible light and ultrasound irradiation. The catalyst exhibited high efficiency, reusability, and minimal sonophotocorrosion, especially in natural waters' pH range.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Meysam Habibi, Aziz Habibi-Yangjeh, Shima, Hushan Chand, Venkata Krishnan, Xuefei Xu, Chundong Wang, Shima Rahim Pouran
Summary: A series of binary nanocomposites based on ZnO and CuCo2S4 were synthesized and their photocatalytic performance for organic pollutant removal under visible light was investigated. The ZnO/CuCo2S4 (20%) sample showed outstanding visible-light-triggered performance. The study emphasized the importance of heterojunction construction and band energy concordance in the binary system, and highlighted the significant role of persulfate ions in enhancing oxidative removal.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Engineering, Environmental
Xin Ji, Xiaoran Liu, Yong Guo, Jiankun Zhang
Summary: A series of BN/PDI materials were synthesized and investigated for their adsorption and photodegradation efficiency for TC under visible light, with BNPDI-2-350 showing the highest performance. The composite exhibited good cyclic degradation efficiency and followed the Z-scheme heterojunction mechanism for TC photodegradation. BNPDI-2-350 showed higher photodegradation efficiency compared to TiO2 (P25) and g-C3N4, showing potential for application in sewage treatment.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Environmental Sciences
Jinhua Luo, Yaohui Wu, Mengzhu Jiang, Aihua Zhang, Xiaoyong Chen, Yelin Zeng, Yonghong Wang, Yunlin Zhao, Guangjun Wang
Summary: This study prepared the ZnFe2O4/BC/ZnO composite material, where biochar (BC) served as the conductive channel and ZnFe2O4 acted as the magnetic substance, to achieve objectives such as broad-spectrum light reactions, effective charge separation, and easily recoverable photocatalysts. Successful Z-scheme hetero-junctions were demonstrated between ZnFe2O4 and ZnO, and the 0.6-ZBO complex showed enhanced light absorption and electron-hole pair separation, thereby improving its redox ability. In different water matrices, the 0.6-ZBO exhibited excellent stability and maintained approximately 11% TC removal ability after 5 cycles.
Article
Environmental Sciences
Maryam Afsharpour, Somayeh Amoee
Summary: In this study, zinc oxide nanohybrids based on functionalized bio-silica were synthesized and applied for the degradation of Congo red under visible light. The results showed that the band gap of bio-silica@ZnO hybrids decreased, leading to enhanced photocatalytic properties. Among the hybrids, SiO2@ZnO hybrid prepared from chitosan-based amino-functionalized silica exhibited the best photocatalytic performance.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Review
Environmental Sciences
Yue Yang, Hao Chen, Jinfeng Lu
Summary: Harmful algal blooms pose a threat to aquatic ecosystems and human health. Visible light-driven photocatalysis has gained attention for algae inactivation due to its low cost, stability, and high removal efficiency. However, the limited utilization of visible light and the rapid electron-hole recombination are challenges for traditional photocatalysts. This review summarizes the recent modifications made to enhance the anti-algae performance of visible light-driven photocatalysts. It also discusses the mechanisms of reactive oxygen species-induced damage to algal cells and photocatalytic degradation of organic matter. Additionally, factors such as photocatalyst dosage, algal concentration and species, and water matrix properties that affect the efficacy of visible light-driven catalytic oxidation for algae removal are outlined. The review concludes with perspectives on the emerging field of visible light-driven photocatalytic inactivation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Physical
Hadi Seyyedbagheri, Reza Alizadeh, Behruz Mirzayi
Summary: A novel ZnO/Bi5O7Br photocatalyst was successfully prepared and used for the visible light-induced degradation of tetracycline hydrochloride. The ZnO/Bi5O7Br (20%) photocatalyst showed remarkable photocatalytic capability among the prepared nanocomposites.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Environmental
Xinling Zhang, Ning Yuan, Yi Li, Lujia Han, Qibao Wang
Summary: The novel semiconductor-MOF composites based on TiO2 and MIL-53(Fe) showed enhanced adsorption and photocatalytic activity for tetracycline under visible light, with the 1:2 ratio of MIL-53(Fe)@TiO2 demonstrating optimal performance. The improved performance was attributed to the n-n type heterojunction photocatalysts and synergy between MIL-53(Fe) and TiO2 in the composites, leading to enhanced visible light absorption and boosted charge carrier transfer ability.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Ying Chen, Man Wang, Bingbing He, Rongjiang Zou, Qiang Wu
Summary: ZnIn2S4 is a promising visible-light photocatalyst with narrow band gap and excellent chemical stability. In this study, flower spheroidal RP/ZnIn2S4 composites were synthesized and showed high efficiency and stability in degrading antibiotic pollutants.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Applied
Qingyuan Zheng, Jack H. Williams, Scott Elgersma, Mick D. Mantle, Andrew J. Sederman, G. Leendert Bezemer, Constant M. Guedon, Lynn F. Gladden
Summary: In this study, a pilot-scale fixed-bed reactor compatible with NMR/MRI was developed for Fischer-Tropsch synthesis. Multiple magnetic resonance techniques were applied to quantitatively characterize different product species within catalyst pellets, providing valuable information for catalyst and reactor optimization.
Article
Chemistry, Applied
Lisa Ramisch, Sebastian Pfaff, Sabrina M. Gericke, Edvin Lundgren, Johan Zetterberg
Summary: We present a combination of optical operando techniques that allow simultaneous measurement of adsorbed species on catalyst surfaces, monitoring of surface oxide formation, and imaging of the gas phase above the catalyst surface. The experimental setup was validated by studying CO oxidation on Pd(100) at different pressures, revealing the effects of pressure on the heterogeneous catalytic reaction.
Article
Chemistry, Applied
Marta Paniagua, Gabriel Morales, Juan A. Melero, Daniel Garcia-Salgado
Summary: The influence of common impurities in levulinic acid on the catalytic performance of different acid catalysts for bio-jet fuel production was studied. It was found that furfural had the greatest detrimental effect on catalyst performance, while propyl-sulfonic acid-modified SBA-15 and sulfonic acid resin Amberlyst-70 showed good regeneration ability.
Article
Chemistry, Applied
Jesus Tapiador, Pedro Leo, Guillermo Calleja, Gisela Orcajo
Summary: This study presents a new MOF material, Zn-URJC-13, with acid and basic sites, permanent porosity, and high affinity to CO2 molecules. The Zn-URJC-13 catalyst exhibits efficient performance in CO2 cycloaddition reactions and can be reused multiple times.
Article
Chemistry, Applied
Dan Zhao, Vita A. Kondratenko, Dmitry E. Doronkin, Shanlei Han, Jan-Dierk Grunwaldt, Uwe Rodemerck, David Linke, Evgenii V. Kondratenko
Summary: This study demonstrates the potential of cheap and commercially available Zr or Ti-based supports and ZnO to serve as active and selective catalysts for propane dehydrogenation (PDH). The catalytically active species formed in situ under PDH conditions consist of isolated ZnOx. ZnOx on the surface of LaZrOx shows the highest rate of propene formation.
Article
Chemistry, Applied
Hanbyeol Kim, Jung Rae Kim, Young-Kwon Park, Jeong-Myeong Ha, Jungho Jae
Summary: In this study, metal phosphates were used as catalysts for biomass conversion to produce sustainable aromatics through DielsAlder cycloaddition reactions. The effects of synthesis method, activation method, and P/Ti molar ratio on the structure and acid properties of titanium phosphate catalysts were systematically studied. The mesoporous titanium phosphate catalyst synthesized by hydrothermal method at 180℃ for 12 h followed by ethanol refluxing at 60℃ for 24 h at a molar P/Ti ratio of 1 showed the highest surface area and acid site density.
Article
Chemistry, Applied
Yasin Khani, Sumin Pyo, Kwang-Eun Jeong, Chul-Ung Kim, Moonis Ali Khan, Byong-Hun Jeon, Kun-Yi Andrew Lin, Siyoung Q. Choi, Young-Kwon Park
Summary: A protonated form of Zeolite Socony Mobil-5 (H-ZSM-5) catalyst was synthesized through a hydrothermal method using different sources of silica. The effect of loading the catalyst with yttrium, samarium, and gadolinium on the acidic properties was investigated. Among the metal-loaded catalysts, the Sm/LHZ catalyst showed the best performance in the methanol to propylene conversion due to its high amount of weak and intermediate acid sites, while the Gd-LHZ catalyst increased the selectivity towards ethane and propane.
Article
Chemistry, Applied
Michael Franc, Ivana Cisarova, Jan Vesely
Summary: The present study investigates an enantioselective cyclization of enals with imidazolone derivatives catalyzed by a combination of achiral Pd(0) complex and chiral secondary amine. Corresponding spirocyclic imidazolones were produced in high yields with moderate diastereoselectivity and excellent enantioselectivity. The developed co-operative catalytic methodology provides a highly substituted spirocyclic scaffold with four stereogenic centers under mild conditions.
Article
Chemistry, Applied
Mauro Alvarez, Jennifer Cueto, David P. Serrano, Pablo Marin, Salvador Ordonez
Summary: This study focuses on improving the formulation and preparation methods of catalysts for the production of dimethyl carbonate. By using suitable catalyst preparation methods and copper salt precursors, the researchers successfully produced catalysts with optimal performance for dimethyl carbonate formation.
Article
Chemistry, Applied
Claudia J. Keijzer, Luc C. J. Smulders, Dennie Wezendonk, Jan Willem de Rijk, Petra E. de Jongh
Summary: This study investigates the catalytic behavior of alpha-alumina supported silver catalysts in the presence of chloride. It is found that the particle size of silver can affect the selectivity of the catalyst, but different strategies lead to different results. In this size range, the selectivity of ethylene oxide is correlated to the Ag : Al2O3 surface ratio.
Article
Chemistry, Applied
Takeshi Aihara, Wataru Aoki, Michikazu Hara, Keigo Kamata
Summary: The development of acid-base bifunctional catalysts is important for promoting specific chemical transformations. In this study, Ti-based perovskite oxides were synthesized and used as catalysts for two C-C bond-forming reactions (cyanosilylation and Knoevenagel condensation). The highly pure SrTiO3 nanoparticles with a high specific surface area exhibited the highest catalytic performance, and could be easily recovered and reused.
Article
Chemistry, Applied
Olga Gorlova, Petra Pribylova, Eliska Vyskocilova, Katerina Peroutkova, Jan Kohout, Iva Paterova
Summary: This study investigates the Baeyer-Villiger oxidation of beta-cyclocitral using tin-modified mixed oxides as catalysts. The optimal reaction conditions and the effects of various factors on the reaction course and selectivity were determined. The results show that tin-modified mixed oxides exhibit high activity and selectivity in the oxidation reaction.
Article
Chemistry, Applied
M. I. Avila, M. M. Alonso-Doncel, L. Briones, G. Gomez-Pozuelo, J. M. Escola, D. P. Serrano, A. Peral, J. A. Botas
Summary: The catalytic fast pyrolysis of lignin using ion-exchanged zeolite catalysts showed significant improvements in bio-oil quality and the production of aromatic hydrocarbons and oxygenated compounds.
Article
Chemistry, Applied
Enrico Catizzone, Giorgia Ferrarelli, Paolo Bruno, Girolamo Giordano, Massimo Migliori
Summary: The acid-catalysed alcohol conversion reaction is a promising route for de-fossilization strategies. Research on pure alcohol conversion and simultaneous dehydration of mixed alcohols have shown different product compositions, with the type and distribution of acid sites affecting the reaction mechanism.
Article
Chemistry, Applied
Alireza Ranjbari, Juho Kim, Jihee Yu, Jiyun Kim, Mireu Park, Nayoung Kim, Kristof Demeestere, Philippe M. Heynderickx
Summary: This study investigated a novel kinetic model for the adsorption and photocatalytic degradation of methyl orange using commercial ZnO and reduced ZnO photocatalysts. The results provided new insights into the interaction of catalysts with molecules of different charges and compared with a previous study on methylene blue. The presence of oxygen vacancies in ZnO and their effects on adsorption and photocatalytic degradation were analyzed, and the photocatalytic degradation rate of reduced ZnO was found to increase significantly.