Article
Environmental Sciences
Gonzalo Alejandro Escareno-Torres, Jose Alfonso Pinedo-Escobar, David Alejandro De Haro-Del Rio, Patricia Becerra-Castaneda, Daniel G. Araiza, Horacio Inchaurregui-Mendez, Cristina Jared Carrillo-Martinez, Luis Mario Gonzalez-Rodriguez
Summary: In this study, ternary photocatalysts comprising TiO2/SnO2/g-C3N4 were synthesized for the degradation of ciprofloxacin (CIP) in water. Various techniques were used to characterize the photocatalysts, and photocatalytic degradation tests of CIP were carried out under different radiation sources. The results showed that the P25/npA/g-C3N4 (90/10) material exhibited the best performance, achieving CIP degradation of over 97%.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Bingrong Guo, Bin Liu, Chaoli Wang, Yuhua Wang, Shu Yin, Muhammad Sufyan Javed, Weihua Han
Summary: A novel S-scheme Ti0.7Sn0.3O2/g-C3N4 heterojunction photocatalyst was proposed, showing superior photocatalytic performance under visible light for the degradation of Rhodamine B and tetracycline hydrochloride in water. The excellent photocatalytic activity is attributed to the effective separation and transfer of photo-generated charges in the S-scheme structure between Ti0.7Sn0.3O2 and g-C3N4.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Materials Science, Paper & Wood
Wenjun Li, Hui Zhang, Wendou Chen, Limeng Yang, Hailiang Wu, Ningtao Mao
Summary: This study demonstrated the recycling and efficient utilization of powdered photocatalysts by loading them on supporting materials. The construction of a g-C3N4-TiO2 heterojunction on cotton fibers improved photocatalytic performance, with the cotton increasing the energy band gap of the nanocomposites. The self-cleaning experiments showed the modified cotton fabrics could effectively remove organic contaminants multiple times.
Article
Chemistry, Physical
Ji Xia, Hanyang Song, Jing Yang, Xiashi Zhu
Summary: Elliptic spherical staggered flower-like g-C3N4/TiO2 fluffy porous heterojunctions were prepared by solvothermal method using tetrabutyl titanate as titanium source and acetic acid as acid solvent. SEM and TEM showed that the ellipsoidal TiO2 was crisscrossed on the flowered TiO2, loaded on fluffy porous g-C3N4. The material exhibited good photodegradation of organic pollutants under visible light, and g-C3N4/TiO2-2 (CNT-2) could remove 99.5% MO within 120 min. In addition, CNT-2 exhibited remarkable photodegradation performance for single and binary mixtures. The main reason for improved performance is that elliptic spherical staggered flowerlike TiO2 and porous g-C3N4 form a heterojunction, which is benefit to reduce the electron-hole recombination efficiency of TiO2 and improve the separation of electron-hole pairs. This result presents a simple strategy for photodegradation of organic pollutants.
CHEMICAL PHYSICS LETTERS
(2023)
Review
Environmental Sciences
Xiaolu Liu, Ran Ma, Li Zhuang, Baowei Hu, Jianrong Chen, Xiaoyan Liu, Xiangke Wang
Summary: Graphitic carbon nitride (g-C3N4) has high thermal stability and a moderate band gap, but its performance is limited by issues like insufficient absorption of visible light. Element doping is an effective strategy to enhance its photocatalytic properties and improve performance.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Environmental
Sweta Gahlot, Frederic Dappozze, Shashank Mishra, Chantal Guillard
Summary: Utilizing a high surface area g-C3N4 for photocatalytic degradation of wastewater yields positive results, with performance increasing linearly with concentration and irradiance. For the photocatalytic degradation of HCOOH, the photonic efficiency is around 5.5%.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Environmental Sciences
Carlos J. Pestana, Jianing Hui, Dolores Camacho-Munoz, Christine Edwards, Peter K. J. Robertson, John. T. S. Irvine, Linda A. Lawton
Summary: Cyanobacteria and their toxins pose a threat to drinking water safety, and using solar light active photocatalysts is a low-cost method to purify water. A recycled glass bead method was used to obtain TiO2 and g-C3N4 coated floating photocatalysts. The results showed that g-C3N4 and TiO2+g-C3N4 coated beads were more effective than TiO2 coated beads in removing cyanotoxins from water.
Article
Chemistry, Multidisciplinary
Maria Leonor Matias, Ana S. Reis-Machado, Joana Rodrigues, Tomas Calmeiro, Jonas Deuermeier, Ana Pimentel, Elvira Fortunato, Rodrigo Martins, Daniela Nunes
Summary: A graphitic carbon nitride/titanium dioxide (g-C3N4/TiO2) heterostructure was synthesized through a fast and simple microwave-assisted method, and it showed excellent photocatalytic activity for the degradation of a recalcitrant azo dye under solar simulating light. The 30% g-C3N4/TiO2 heterostructure exhibited the best performance.
Article
Environmental Sciences
Naveen Kumar, Monika Kumari, Mohammed Ismael, Muhammad Tahir, Raj Kishore Sharma, Kavitha Kumari, Janardhan Reddy Koduru, Pardeep Singh
Summary: Graphitic carbon nitride (g-C3N4)-based materials have unique properties that make them suitable for designing photocatalytic and sensing materials. In this review, the structure, properties, and synthesis strategies of g-C3N4 and its assisted materials are introduced. The use of g-C3N4 in composites with metal oxides, sulfides, noble metals, and graphene is elaborated. The application of g-C3N4 and its assisted materials in sensing toxic gases and VOCs, as well as decontaminating NOx and VOCs by photocatalysis, is summarized. Overall, this review provides valuable insights for developing practical applications of g-C3N4-based photocatalysts and sensors.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Feidias Bairamis, Ilaeira Rapti, Ioannis Konstantinou
Summary: In recent years, the interest in photocatalysis has grown rapidly due to its importance in environmental depollution and addressing the energy crisis. Graphitic carbon nitride (g-C3N4) photocatalyst has gained attention for its properties and ease of preparation, although efforts are needed to improve charge carrier separation efficiency. Z-scheme-based heterostructures have emerged as a promising approach for separating charge carriers and enhancing oxidation and reduction capability. This review focuses on the development and application of Z-scheme-based g-C3N4 composite materials in the past three years, particularly their photocatalytic efficiency for addressing emerging pollutants.
CURRENT OPINION IN GREEN AND SUSTAINABLE CHEMISTRY
(2023)
Article
Chemistry, Physical
Tingcha Wei, Juan Xu, Caixia Kan, Le Zhang, Xingzhong Zhu
Summary: The study focuses on the construction of a g-C3N4/TiO2 heterostructure with tailored Au nanoparticles for efficient charge separation in photocatalysis. The enhanced charge separation leads to excellent photocatalytic activity for pollutant degradation and water splitting, with superoxide radicals identified as playing a crucial role in the catalytic process. Insights into the distinct roles of Au in heterostructure for significantly enhanced charge separation are provided, paving the way for the design of high-efficiency heterostructure photocatalysts with noble metal decoration.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Environmental Sciences
Ch. Venkata Reddy, Aashna Nagar, Nagaraj P. Shetti, I. Neelakanta Reddy, Soumen Basu, Jaesool Shim, Raghava Reddy Kakarla
Summary: In this study, novel g-C3N4/BiVO4 nanohybrid catalysts were prepared and characterized. The composite catalyst exhibited enhanced photocatalytic degradation efficiency of methylene blue and tetracycline pollutants.
Article
Chemistry, Physical
Miaodan Dong, Qiulan Li, FeiJian Xiao, Yijie Wang, Dezhi Yang, Yaling Yang
Summary: The combination of sonosensitizer molecules and graphitic carbon nitride modified by Cu enhances the catalytic activities and ROS generation for effective antimicrobial activities. The developed photoacoustic nanozyme system provides a promising strategy for eradication of bacterial infection.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Xian-jin Ma, Heng Yang, Bin Wang, Lang Wu, Xue Ma, Yu-xiang Li, Hao Deng
Summary: A heterojunction TiO2/g-C3N4 photocatalyst was synthesized using a ball-milling method, which showed high efficiency in degrading TcO4-. Under simulated sunlight irradiation, the removal rate of ReO4- reached over 95% in 10 min, making it faster than other photocatalysts.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Environmental Sciences
Hai Bang Truong, Jin Hur, Xuan Cuong Nguyen
Summary: Graphitic carbon nitride (g-C3N4) has gained significant attention in the past decade for its potential in environmental remediation, particularly as a visible light photocatalyst. However, challenges in practical applications, such as the powdered form hindering separation and the limited research on real-world use, exist. Integration of magnetic or floating materials and the synergy of experimental and computational approaches offer promising solutions to address these challenges.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Chemistry, Physical
Kasimayan Uma, Shin-Wen Chen, Balu KrishnaKumar, Chellappa Jeyaprabha, Thomas C. -K. Yang, Ja-Hon Lin
Summary: The CdS nanostar decorated SiO2/TiO2-ST spheres showed enhanced photocatalytic activity under visible light irradiation compared to the SiO2-CdS spheres, attributed to providing more active sites for dye adsorption and reducing electron-hole recombination.
Article
Optics
Shih-Wen Chen, Jin-You Lu, Bing-Yi Hung, Matteo Chiesa, Po-Han Tung, Ja-Hon Lin, Thomas Chung-Kuang Yang
Summary: A novel method for fabricating high-performance biological photonic crystal random lasers using dye-coated butterfly wings as scattering materials is proposed and demonstrated. The optical and lasing properties show superior performance compared to previous studies, with stable laser emission and a low threshold for laser generation. These biological devices have potential applications in sustainable and accessible imaging strategies.
Article
Nanoscience & Nanotechnology
Yi-Lun Chen, Guang-Yu Lee, Ming-Yen Sung, Jen-Hsien Huang, Er-Chieh Cho, Kuen-Chan Lee
Summary: Establishing different linking groups between nanodiamond (ND) and TiO2 (P25) provides more effective protection under oxidative stress and UV light irradiation by controlling charge transfer behaviors. The linking groups dictate the performance of ROS generation from nano-TiO2 under UV-light irradiation. Anti-inflammatory activity and reduction of cellular DNA damage were observed in experiments using ND-TiO2 composites.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Sridharan Balu, Yi-Lun Chen, Shih-Wen Chen, Thomas C. -K. Yang
Summary: Metal vanadate and graphitic carbon nitride are semiconductor materials with excellent physicochemical and photocatalytic performances. BixFe1-xVO4/SCN nanocomposites were prepared by mixing cation precursors and impregnating them on the surface of sulfur-doped g-C3N4. The results showed that the nanocomposites exhibited higher photocatalytic activity and photo current density compared to other samples under visible light.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Environmental Sciences
Er-Chieh Cho, Cai-Wan Chang-Jian, Jen-Hsien Huang, Tzu-Yen Huang, Nian-Jheng Wu, Man-Tzu Li, Yi-Lun Chen, Shih-Chieh Hsu, Huei Chu Weng, Kuen-Chan Lee
Summary: In this study, Ni(OH)2/CuO heterostructured photocatalysts were prepared by microwave hydrothermal method. The heterostructured composite exhibited strong absorption in the UV and Vis regions, and the construction of the heterojunction improved the photogenerated carrier transport and inhibited the electron-hole separation. The Ni(OH)2/CuO (1:1) heterostructures showed the best photocatalytic efficiency and also displayed remarkable degradation activity towards antibiotics and Escherichia coli.
Article
Chemistry, Physical
Harikrishnan Venkatesvaran, Sridharan Balu, Anuradha Chowdhury, Shih-Wen Chen, Thomas C-K Yang
Summary: In this study, we successfully synthesized a metal-free sulfonic functionalized graphitic carbon nitride and characterized its sulfonic groups using various spectroscopic tools. The sulfonic functionalization enhanced the surface charge density and charge separation of the material, leading to excellent optical and surface properties for enhanced photo-redox reactions.
Article
Chemistry, Physical
Anuradha Chowdhury, Sridharan Balu, Harikrishnan Venkatesvaran, Shih-Wen Chen, Thomas C. -K. Yang
Summary: This study demonstrates the synthesis of a low-cost and robust CuFe2O4/P-g-C3N4 composite for environmental remediation applications. The composite exhibits high photocatalytic activity and effectively degrades pollutants.
SURFACES AND INTERFACES
(2022)
Article
Engineering, Chemical
Harikrishnan Venkatesvaran, Sridharan Balu, Bing-Shiun Tsai, Thomas C. -K. Yang
Summary: In this study, nano-flake-like bismuth oxybromide embedded sulfonic acid-functionalized graphitic carbon nitride (BiOBr-NFs/g-C3N4-SAF) was successfully prepared through surface modification and heterojunction formation. The photocatalyst exhibited excellent catalytic activity for both photooxidation and photoreduction reactions, with remarkable performance in the degradation of Cr(VI) and RhB.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Chemistry, Physical
Sridharan Balu, Harikrishnan Venkatesvaran, Kuo-Wei Lan, Thomas C-K Yang
Summary: In this study, a core-shell structure CdS-NPs@ZnO-NRs nanoparticle was synthesized for photo(electro)chemical applications. The catalyst exhibited high photocatalytic activity and photoelectronic properties, making it a strong candidate for visible-light degradation and water oxidation reactions.
Article
Chemistry, Multidisciplinary
Y. -l. Chen, G. -y. Lee, D. -w. Tang, K. Huang, P. -y. Lo, J. -h. Huang, E. -c. Cho, K. -c. Lee
Summary: In this study, a ZIF-8-based multifaceted platform with a hollow structure and abundant functional groups was developed using a simple one-pot method. The modified ZIF-8 exhibited a hollow morphology, colloidal stability, and a thiol-rich surface, resulting in enhanced antioxidant and anti-inflammatory abilities compared to pristine ZIF-8. The modified ZIF-8 could be highly functionalized and specifically encapsulated a large quantity of gold nanoparticles, showing potential for further applications. Moreover, the modified ZIF-8 demonstrated good biocompatibility in human cells and in vivo zebrafish models, suggesting its potential as a protective agent against oxidative stress. This concept highlights the new era of functionalized ZIF-8 as the next generation of multifunctional biomaterials.
MATERIALS TODAY CHEMISTRY
(2023)
Review
Chemistry, Physical
Sridharan Balu, Abdul Hanan, Harikrishnan Venkatesvaran, Shih-Wen Chen, Thomas C. -K. Yang, Mohammad Khalid
Summary: Climate change, driven by greenhouse gas emissions, presents a significant threat to the world. The global CO2 emissions reached 31.5 Gt in 2021, resulting in an atmospheric CO2 concentration of 412.5 ppm. Urgent action is needed to develop new technologies that can convert CO2 into valuable feedstock products. The efficiency of electrochemical CO2 reduction reactions is influenced by the intrinsic properties of catalytic materials, and issues such as poor selectivity and high overpotential requirements can be addressed by modifying heterogeneous electrocatalysts.
Article
Engineering, Environmental
Anuradha Chowdhury, Sridharan Balu, Thomas C. -K. Yang
Summary: In this study, a mesoporous α-Fe2O3-NPs@AgVO3-NRs (0D/1D) Z-scheme semiconductor photocatalytic system was prepared for energy production and environmental remediation applications. The α-Fe2O3-NPs and AgVO3-NRs were synthesized separately and then combined to form a heterojunction. The resulting α-Fe2O3@AgVO3 nanocomposite exhibited excellent visible light trapping capability and enhanced charge separation, resulting in high photoreduction efficiency and photocurrent density. The formation of the Z-scheme heterojunction facilitated photogenerated charge carrier migration and separation, leading to efficient photo-redox reactions. Overall, this work provides a feasible strategy for synthesizing binary synergistic catalytic systems for photo(electro)chemical applications.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)