Article
Chemistry, Physical
Maira Liaqat, Tahir Iqbal, Zain Ashfaq, Sumera Afsheen, Rana Rashad Mahmood Khan, M. A. Sayed, Atif Mossad Ali
Summary: This study synthesized a series of composite cuprous oxide and bismuth vanadate photocatalysts using a chemical method, and investigated their photocatalytic activity in degrading antibiotics. The results showed that the 5% Cu2O/BiVO4 composite exhibited the highest photocatalytic activity. Furthermore, the composite demonstrated stability and reusability, and its improved performance was attributed to decreased electron-hole recombination rate and increased surface area.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Maira Liaqat, Khalid Nadeem Riaz, Tahir Iqbal, Ghulam Nabi, Muhammad Rizwan, M. Shakil
Summary: Heterostructure BiVO4/Bi2O3 nanocomposites with enhanced visible light activity were synthesized through a hydrothermal route. The p-n heterojunction formed between the p-type Bi2O3 and n-type BiVO4 effectively reduced the recombination of photogenerated charge carriers, leading to excellent photocatalytic performance and stability.
Article
Engineering, Chemical
Chung-Hsin Wu, Cheng-Di Dong, Chiu-Wen Chen, Yi-Li Ling, Yu-Rong Cheng, Guo-Yi Lee
Summary: A novel Bi2O3/BiVO4/Ag3VO4 (BBA) heterojunction photocatalyst was synthesized via a two-step hydrothermal/solvothermal procedure, with the optimal BVO/AVO molar ratio being unity. The BBA demonstrated enhanced photocatalytic performance, with the rate constant of the Vis. photocatalysis of the degradation of RR2 being significantly higher compared to BOS, BVO, AVO and BA(1) photocatalysts. This improvement was attributed to the reduced recombination probability of the photo-generated electrons and holes in BBA.
DESALINATION AND WATER TREATMENT
(2021)
Article
Engineering, Environmental
Zeyu Duan, Xiaojun Zhao, Limiao Chen
Summary: A novel Z-scheme BiVO4/Cu0.4V2O5 heterojunction photocatalyst was successfully prepared, showing significantly enhanced photocatalytic performance for CO2 reduction under visible-light irradiation, mainly attributed to the superior charge-transport property derived from the Z-scheme structure.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Chung-Hsin Wu, Cheng-Di Dong, Chiu-Wen Chen, Yi-Li Lin, Syuan-Ru Jhu, Yong-Hui Lin
Summary: In this study, BOS/BVO and BOS/AVO composites were prepared using different synthetic procedures and characterized using various analysis techniques. The improvement in photocatalytic activity of the composites was attributed to the prolongation of the lifetime of photo-generated electron-hole pairs. The RR2 photodegradation rate varied under different light conditions for the composites.
DESALINATION AND WATER TREATMENT
(2021)
Article
Engineering, Electrical & Electronic
Muhammad Munir Sajid, Haifa Zhai, Thamer Alomayri, Sadaf Bashir Khan, Yasir Javed, Naveed Akhtar Shad, Ali Raza Ishaq, Nasir Amin, Zhengjun Zhang
Summary: This paper describes the sonicated assisted hydrothermal synthesis of platinum doped bismuth vanadate (Pt/BiVO4) semiconductor photocatalyst and explores the improved photocatalytic activity and basic mechanisms of Pt co-catalysts.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Environmental Sciences
Ali Dehdar, Ghorban Asgari, Mostafa Leili, Tayyebeh Madrakian, Abdolmotaleb Seid-mohammadi
Summary: In this study, photodegradation of 4-chlorophenol using a BiVO4/WO3 heterostructure under visible LED light irradiation was investigated. Results showed that it had higher efficiency in 4-CP degradation than other systems, and identified major intermediates of degradation were phenol and chlorobenzene.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Chemistry, Physical
Abdullah M. Asiri, T. Nawaz, M. B. Tahir, N. Fatima, Sher Bahadar Khan, Khalid Ahmad Alamry, Soliman Y. Alfifi, Hadi M. Marwani, Maha M. Al-Otaibi, Sudip Chakraborty
Summary: The research utilized WO3/BiVO4 composites as photoanodes for producing hydrogen energy from biomass via photoelectrochemical cells. Experimental results showed that adding 3% BiVO4 increased absorption region, decreased recombination rate, and led to higher hydrogen production efficiency. WO3/BiVO4 (3%) demonstrated the best efficiency and stability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
Qingming Meng, Zhiquan Yin, Qilin Lu, Yunsheng Xia, Yan Zhao, Xin Wan
Summary: The heterostructured BiFeO3/beta-Bi2O3 nanofibers prepared using the electmspinning process exhibited improved photocatalytic denitrification ability and excellent cycling stability in removing pyridine, mainly due to enhanced light harvesting and more efficient separation and migration of photogenerated charges.
Article
Chemistry, Multidisciplinary
Haibin Li, Xiang Luo, Ziwen Long, Guoyou Huang, Ligang Zhu
Summary: In this study, n-p Bi2O2CO3/alpha-Bi2O3 heterojunction microtubes were successfully prepared via a one-step solvothermal route, and Ag nanoparticles were loaded onto the microtubes. The results showed that the carbonatization of alpha-Bi2O3microtubes on the surface led to the formation of a Bi2O2CO3/alpha-Bi2O3 heterostructure. The photocatalytic activity evaluation demonstrated that Bi2O2CO3/alpha-Bi2O3 with a Bi2O2CO3 mass fraction of 6.1% exhibited the highest activity, and loading with Ag nanoparticles significantly enhanced the photocatalytic activity of Bi2O2CO3/alpha-Bi2O3.
Article
Environmental Sciences
Agha Zeeshan Ali, Yiqian Wu, Yasmina-Doekhi Bennani, Henri Spanjers, Jan Peter van der Hoek
Summary: The presence of organic micro-pollutants (OMPs) in wastewater treatment effluents poses a significant threat to water safety. A study investigated the application of BiVO4/BiOI heterojunction photoanode for acetaminophen removal in demineralized water. The heterojunction photoanode showed improved charge separation efficiency and exhibited higher removal efficiency compared to BiVO4 photoanode. These results provide valuable insights for the effective removal of acetaminophen, an OMP, from wastewater.
Article
Engineering, Environmental
Tao Tang, Zhengliang Yin, Juanrong Chen, Sai Zhang, Weichen Sheng, Wenxian Wei, Yingguan Xiao, Qingye Shi, Shunsheng Cao
Summary: A novel p-n heterojunction visible-light photocatalyst was synthesized to achieve complete degradation of antibiotics, demonstrating the synergistic effect of Ti3+ self-doping and the p-n heterojunction. The study also investigated the effects of various factors on the degradation of tetracyclines, revealing the transformation pathways and degradation mechanism of the antibiotics. This work provides insight into exploring excellent photocatalysts for the complete removal of refractory organic pollutants under visible light.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
La Phan Phuong Ha, Tran Hoang The Vinh, Nguyen Thi Be Thuy, Cao Minh Thi, Pham Van Viet
Summary: The combination of noble metals and semiconductors can create an efficient photocatalyst for degrading organic pollutants with visible light activation. In this study, Ag/ZnO nanorods were synthesized and showed superior photocatalytic activity compared to bare ZnO nanorods, thanks to the enhanced separation of electron-hole pairs and the localized surface plasmon resonance effect derived from silver nanoparticles.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Peng Ju, Lei Hao, Yu Zhang, Jianchao Sun, Kunpeng Dou, Zhaoxia Lu, Dankui Liao, Xiaofan Zhai, Chengjun Sun
Summary: Novel MoS2/BiVO4 porous spindlelike heterostructures (MBV SHs) were synthesized, which displayed excellent photocatalytic antibacterial performance and potential application in environmental purification.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Physical
Xinhe Liu, Yong Kang, Yi Wang
Summary: Novel visible-light responsive beta-Bi2O3/Ag2WO4 p-n heterojunction photocatalysts exhibited excellent photo-catalytic activity for the degradation of methylene blue under visible light, with a significantly higher degradation rate and good cycling stability compared to pure beta-Bi2O3 and Ag2WO4 samples.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Luan Farinelli Diniz, Juan Carlos Tenorio, Caue Ribeiro, Paulo de Sousa Carvalho Jr
Summary: This study focuses on the preparation and characterization of different salts of Sertraline (Srt) to improve its thermal stability and solubility. The crystal structures of the salts, including oxalate, fumarate, maleate, and methanesulfonate, were analyzed, and their potential applications in drug formulation and purification were discussed.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Environmental Sciences
Roger Borges, Lilian Fernanda Martins do Amaral, Vitoria Palhares Ribeiro, Christiane Abreu de Oliveira- Paiva, Fernando Wypych, Caue Ribeiro
Summary: This study proposes a mechanochemical method to use asbestos fibers from raw chrysotile and asbestos cement as a nutrient source for agriculture. By applying citric acid, the fibers are disrupted and calcium/magnesium citrates are formed through ion migration. Experimental results show that these citrates stimulate the soil microbiota and correct acid soil pH as readily available carbon source, similar to commercial limestone.
WASTE AND BIOMASS VALORIZATION
(2023)
Article
Chemistry, Physical
Juliana. A. A. Torres, Andre E. Nogueira, Gelson T. S. T. da Silva, Caue Ribeiro
Summary: The influence of heat treatment and decoration of SnO2 with gold nanoparticles on CO2 photoreduction process was analyzed. Both treatments had a deleterious effect on the reactions, with a significant drop in methane production under UV radiation. However, under visible radiation, the decorated SnO2 showed plasmonic resonance and produced methane with small amounts of carbon monoxide. These results demonstrate that the surface characteristics of SnO2 are responsible for its catalytic activity, despite its unfavorable band structure for CO2 reduction.
Review
Energy & Fuels
Eduardo Arizono dos Reis, Gelson T. S. T. da Silva, Elisabete I. I. Santiago, Caue Ribeiro
Summary: Electrochemical CO2 reduction to fuels or commodity chemicals using renewable energy has gained attention as a means to close the anthropogenic chemical carbon cycle. The use of nonaqueous electrolytes in the reaction offers advantages such as suppressing the hydrogen evolution reaction, controlling proton-assisted reduction reactions, and favoring C-C coupling. This review explores recent findings and discusses the components of the electrochemical reactor that influence the reaction selectivity in nonaqueous media.
Review
Agronomy
Mariana Brondi, Mohamed Eisa, Ricardo Bortoletto-Santos, Donata Drapanauskaite, Tara Reddington, Clinton Williams, Caue Ribeiro, Jonas Baltrusaitis
Summary: Ammonium carbonates, including ammonium bicarbonate, ammonium carbonate hydrate, and ammonium carbamate, were once extensively used as fertilizer materials but gradually replaced by urea fertilizers. With the emergence of sustainable agriculture, there is a need to recover and reuse nutrients using conventional feedstocks and biogenic waste streams. Anaerobic digestion liquid presents a convenient source to produce solid fertilizers containing nitrogen and carbon. This review discusses the feedstocks, methods to concentrate and crystallize solid ammonium carbonates, technologies to stabilize them in the environment, and their agricultural efficiency as nitrogen and carbon sources.
Article
Chemistry, Physical
Marcela Pfeifer, Ricardo Bortoletto-Santos, Flavio A. C. Andrade, Sidney J. L. Ribeiro, Fauze A. Aouada, Caue Ribeiro
Summary: Improper disposal of metal-containing wastes harms the environment and human health. This study investigates the sorption and desorption of Cr6+, Cu2+, and Mn2+ by modifying polyacrylamide/methylcellulose hydrogels with bentonite or hydrotalcite. The nanocomposite produced by calcining hydrotalcite at 550 degrees C exhibits the best retention properties.
APPLIED CLAY SCIENCE
(2023)
Article
Electrochemistry
Jian F. S. Pereira, Larissa M. A. Melo, Luciano C. Arantes, Pedro H. S. Borges, Lucas Faria, Kelly F. da Cunha, Karla A. O. Souza, William O. Sote, Jose Luiz Costa, Edson Nossol, Rogerio Gelamo, Eduardo M. Richter, Moacyr Comar Jr, Wallans T. P. dos Santos, Osmando F. Lopes, Rodrigo A. A. Munoz
Summary: This study presents a new sensing platform for MDMA detection - affordable graphite sheet (GS) electrodes. By using cold plasma surface treatment, the electrochemical response of MDMA has been improved. The treated GS electrodes demonstrated a higher surface area and lower resistance to charge transfer. Differential pulse voltammetry achieved a linear range from 0.5 to 15.0 mu mol L-1 with a low limit of detection (0.09 mu mol L-1). Computational simulations confirmed higher interaction between plasma-treated GS surface and MDMA, explaining the improved sensing properties. The method showed high selectivity and successfully detected MDMA in human saliva and seized samples.
ELECTROCHIMICA ACTA
(2023)
Article
Materials Science, Multidisciplinary
Gelson T. S. T. da Silva, Osmando F. Lopes, Ariadne C. Catto, Antonio Otavio T. Patrocinio, Alexandre Mesquita, Caue Ribeiro, Waldir Avansi Jr, Luis F. da Silva
Summary: In this study, the influence of hydrothermal treatment temperature on the structures of SnO2 nanoparticles as photocatalysts and photoanodes was investigated. The results showed that the structural order of SnO2 NPs increased with the hydrothermal temperature. The hydrothermal treatment also increased the amount of hydroxyl groups on the SnO2 NPs surface. The photocatalytic activity of the NPs was affected by the hydrothermal treatment temperature, with crystallinity and surface hydroxyl groups playing a significant role.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Analytical
Jian F. S. Pereira, Marina Di-Oliveira, Lucas V. Faria, Pedro H. S. Borges, Edson Nossol, Rogerio V. Gelamo, Eduardo M. Richter, Osmando F. Lopes, Rodrigo A. A. Munoz
Summary: A cold CO2 plasma treatment was shown to improve the electrochemical activity of graphite sheet (GS) electrodes by increasing surface defects and oxygenated functional groups. This treatment significantly enhanced the electron transfer coefficient and reduced the resistance to charge transfer. The CO2-GS electrode demonstrated high sensitivity for the detection of emerging contaminant species in natural waters and urine samples, with submicromolar limit of detection values achieved.
Article
Chemistry, Physical
Chubraider Xavier, Bianca Rebelo Lopes, Cleyryson de Sousa Lima, Caue Ribeiro, Eduardo Bessa Azevedo
Summary: This study demonstrates that graphitic carbon nitride impregnated with reduced graphene oxide is a potential and efficient non-metallic photocatalyst for removing the plasticizer and endocrine disruptor bisphenol A from water. Under optimal conditions, the photocatalyst removed 90% of BPA in 90 minutes. The superoxide radical was identified as the main reactive oxygen species involved in the degradation, and two major degradation products were found to be less ecotoxic than BPA.
Article
Materials Science, Multidisciplinary
Stella F. Valle, Amanda S. Giroto, Caue Ribeiro
Summary: Phosphaterock and struvite dispersion in a polysulfide matrix provides a sustainable alternative for phosphorous fertilization, as it can enhance P dissolution and control its release, while also serving as a sulfur fertilizer. The study investigates the permeability mechanism and factors affecting P diffusion from PS composites. The results show that the PS composites exhibit higher P release and availability in soil compared to pure ST.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Engineering, Environmental
Roger Borges, Lilian Fernanda Martins do Amaral, Thalita Jessika Bondancia, Rilton Alves de Freitas, Fernando Wypych, Caue Ribeiro
Summary: Cellulose acetate can be recovered and reused through mechanochemical activation and treatment with citric acid and H2O2. Ca(OH)2 can hydrolyze acetate groups, while CaCO3 can reduce particle size while keeping the acetate functional groups. The resulting cellulose nanoparticles can be used in Pickering emulsions with slight differences in droplet sizes.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Chemistry, Physical
Marcos Eduardo G. Carmo, Laura Spies, Gabriela N. N. Silva, Osmando F. F. Lopes, Thomas Bein, Jenny Schneider, Antonio Otavio T. Patrocinio
Summary: Solar-driven photochemical CO2 reduction over semiconducting materials is crucial for sustainable development as it provides renewable fuels and helps combat environmental problems. However, challenges related to selectivity, conversion efficiency, and long-term stability need to be addressed. This review highlights recent advances in understanding the relationship between CO2 conversion efficiency and photocatalyst properties, as well as the design of organic-inorganic hybrids for enhanced CO2 reduction.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Marlete A. Souza, Marcela P. Bernardo, Higor O. Alves, Cleiton P. M. Silva, Antonio Otavio T. Patrocinio, Osmando F. Lopes
Summary: This study investigates the effect of synthesis parameters on the physical-chemical properties and photocatalytic performance of Nb2O5. The parameters were found to influence the crystalline phase, morphology, and specific surface area of Nb2O5. Nb2O5 samples synthesized by hydrothermal method showed smaller size, homogeneous particles, higher specific surface area, and surface hydroxylation. The samples exhibited activity in degrading organic pollutants and producing H2, with the specific surface area and surface hydroxylation playing a key role. The most active sample for organic pollutant degradation also showed activity in H2 production, which was further enhanced by Pt nanoparticle decoration.
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Ricardo Marques e Silva, Fernanda de Lourdes Souza, Eduardo Dias, Gelson Tiago dos Santos Tavares da Silva, Florymar Escalona Duran, Arjun Rego, Drew Higgins, Caue Ribeiro
Summary: Partial oxidation of methane into hydrocarbons using photoelectrochemical routes is attractive for sustainable development. The use of semiconductor heterostructures can improve charge separation and enhance the efficiency of methane activation and oxidation. In this study, TiO2:SnO2 heterojunction catalysts exhibited superior performance in methane oxidation due to the formation of heterostructure type II, which facilitates the separation of electron-hole pairs and promotes the generation of reactive oxygens.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)