DataVXAdvanced Sustainable SystemsPaper
journal article·2024-04

Insights into Molten Salts Induced Structural Defects in Graphitic Carbon Nitrides for Piezo‐Photocatalysis with Multiple H 2 O 2 Production Channels

Pho Phuong Ly, Duc‐Viet Nguyen, Tuyen Anh Luu, Nguyen Quang Hung, Pham Thi Hue, Nguyen Thi Ngoc Hue, Minh‐Thuan Pham, Thuy Dieu Thi Ung, Do Danh Bich, Pham Duc Minh Phan, Nguyen Hoai Anh, Huynh Phuoc Toan, Dai‐Phat Bui, Vinh‐Ai Dao, Seung Hyun Hur, Hoai‐Thanh Vuong

Advanced Sustainable Systems· Volume 8· Issue 4
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Source abstract

Abstract

Abstract Elucidating the impact of heteroatoms in graphitic carbon nitrides (g‐C 3 N 4 ) is of utmost importance to rationalize materials. Hence, in this study, oxygen‐doped g‐C 3 N 4 containing trace amounts of halogen in the structures for piezo‐photosynthesis of hydrogen peroxides (H 2 O 2 ) is fabricated. The findings reveal that oxygen atoms may be inserted into g‐C 3 N 4 in‐plane structures, while halogen atoms tend to become intercalated between g‐C 3 N 4 layers. Furthermore, the presence of ammonium molten salts (NH 4 X) during the synthesis alters the concentration of mono and cluster vacancies of carbon and nitrogen in the materials, certifying by positron annihilation spectroscopy (PAS). These defective contributions will be meaningfully accelerate catalytic performance by providing trapping states. Additionally, the decomposition of generated H 2 O 2 can produce highly oxidative hydroxyl radicals, inducing degradations on the catalyst's structures and unexpectedly decreasing catalytic outcomes. From the mechanistic view, different reduction and oxidation channels will be play a pivotal role in generating H 2 O 2 . Moreover, the influence of ultrasound and light is also carefully investigated in the work to gain more insights into how the catalysts are triggered to improve catalytic performance. Thus, this study highlights the importance of carefully characterizing structures of g‐C 3 N 4 to precisely understand the catalytic properties, benefiting catalytic design and development.
Source: crossref · Quality: baseline

Research context

Catalysis & surfaces

OpenAlex topics: Advanced Photocatalysis Techniques · Ga2O3 and related materials · ZnO doping and properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Faculty of Chemical Engineering Ho Chi Minh City University of Technology (HCMUT) 268 Ly Thuong Kiet, District 10 Ho Chi Minh City 700000 Vietnam

Vietnam National University Ho Chi Minh City (VNU‐HCM) Linh Trung Ward, Thu Duc City Ho Chi Minh City 700000 Vietnam

School of Chemical Engineering University of Ulsan Ulsan 44610 South Korea

Center for Nuclear Technologies Vietnam Atomic Energy Institute Ho Chi Minh City 700000 Vietnam

Insitute of Fundamental and Applied Sciences Duy Tan University Ho Chi Minh City 700000 Vietnam

Faculty of Natural Sciences Duy Tan University Da Nang City 550000 Vietnam

Center for Environmental Toxin and Emerging‐Contaminant Research Cheng Shiu University Kaohsiung 83347 Taiwan

Institute of Environmental Toxin and Emerging‐Contaminant Cheng Shiu University Kaohsiung 833301 Taiwan

Institute of Materials Science Vietnam Academy of Science and Technology Hanoi 100000 Vietnam

Department of Physics Hanoi National University of Education 136 Xuan Thuy Hanoi 100000 Vietnam

Advanced Materials and Application Research Group (AMA) HUTECH University 475A Dien Bien Phu Street, Ward 25, Binh Thanh District Ho Chi Minh City 700000 Vietnam

Department of Physics, Faculty of Applied Sciences Ho Chi Minh City University of Technology and Education Ho Chi Minh City 700000 Vietnam

Department of Chemistry and Biochemistry University of California Santa Barbara (UCSB) Santa Barbara CA 93106 USA

Funding

National Foundation for Science and Technology Development

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