Article
Chemistry, Multidisciplinary
Yuri Choi, Sungho Choi, Inhui Lee, Trang Vu Thien Nguyen, Sanghyun Bae, Yong Hwan Kim, Jaegeon Ryu, Soojin Park, Jungki Ryu
Summary: This study presents an approach utilizing earth-abundant and non-toxic photocatalysts for efficient hydrogen production and biomass reforming using solar energy. Si flakes (SiF) are used for efficient light-harvesting, and Ni-coordinated N-doped graphene quantum dots (Ni-NGQDs) enable efficient and stable biomass reforming and hydrogen production. The SiF/Ni-NGQDs demonstrate record-high hydrogen productivity and vanillin yield under simulated sunlight. This strategy provides valuable insights for the practical applications of solar energy and biomass refinement.
ADVANCED MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Zhen Sun, Junxiang Wang, Sen Lu, Guan Zhang
Summary: Solar reforming of cellulosic biomass into hydrogen is a promising approach for sustainable utilization of biomass waste and renewable energy development. This study proposes a strategy that combines enzymatic hydrolysis of cellulose with photocatalytic H2 production, and synthesizes a high-performance titanium dioxide photocatalyst. By optimizing the conditions for enzymatic hydrolysis and photocatalytic reaction, and using the enzymatic depolymerized products as sacrificial agents, efficient hydrogen production from water is achieved.
Review
Chemistry, Physical
Wenhao Sun, Jiefang Zhu, Yuanhui Zheng
Summary: This review discusses the advantages and characteristics of geC(3)N(4)-based heterojunction photocatalysts and their recent progress in photocatalytic water splitting. It also outlines the future prospects and challenges of geC(3)N(4)-based heterojunction photocatalysts in hydrogen production.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Amir Al-Ahmed
Summary: Global warming and environmental issues are driving the adoption of clean energy sources, with hydrogen being considered one of the most promising options. Photocatalytic water splitting using graphitic carbon nitride has been shown to be a cost-effective approach with potential for high performance.
Article
Green & Sustainable Science & Technology
Debarun Banerjee, Nidhi Kushwaha, Nagaraj P. Shetti, Tejraj M. Aminabhavi, Ejaz Ahmad
Summary: Hydrogen, considered as the cleanest fuel, can be produced from various sources, including biomass. Conventional methods for hydrogen production have drawbacks, while photo-reforming of bio-renewable oxygenates has emerged as a promising and green alternative. The rate of hydrogen production via photoreforming depends on catalyst properties, oxygenate structure, operating conditions, and other factors.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Review
Chemistry, Physical
Zhiliang Wang, Takashi Hisatomi, Rengui Li, Kazuhiro Sayama, Gang Liu, Kazunari Domen, Can Li, Lianzhou Wang
Summary: The article discusses testing protocols for reliable efficiency reporting of photocatalytic overall water splitting based on particulate photocatalysts. It emphasizes the importance of establishing accreditation research laboratories for efficiency certification and proposes the launch of a "best research photocatalyst efficiencies" chart.
Article
Chemistry, Physical
Sunghak Park, Seungwoo Choi, Sungho Kim, Ki Tae Nam
Summary: Photocatalysis is a cost-effective technology for converting solar energy into chemical energy. Metal halide perovskite (MHP) photocatalysts have recently gained attention due to stabilization strategies developed for them under reaction conditions. Breakthroughs in the application of MHPs in catalyzing solar fuel production and organic transformations have been described, along with scientific challenges for their practical implications.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
Zhaoyi Li, Zhen Sun, Guan Zhang
Summary: Combining enzymatic catalysis and heterogeneous photocatalysis can convert solar energy into hydrogen, which is attractive for sustainable biomass waste utilization and renewable energy development. By developing a low-cost Cu0.5Ni0.5-TiO2 photocatalyst, remarkable hydrogen production performance comparable with Pt-TiO2 under UV light irradiation has been achieved. Finally, the integration of enzymatic catalysis and photocatalysis has been optimized to improve hydrogen production efficiency.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Environmental
Cheng-Ting Lee, Ling- Hung, Yu-Chieh Shih, Jeffrey Chi-Sheng Wu, Sue-Lein Wang, Chao-Wei Huang, Van-Huy Nguyen
Summary: The unique magnesium salt of titanium phosphite (MgTiP) was synthesized and applied for photocatalytic hydrogen evolution using seawater. The addition of a sacrificial agent, FeCl2, in the system enhanced hydrogen evolution and prevented MgTiP from photo-corrosion. The ions in seawater acted as sacrificial agents and enhanced the photocatalytic hydrogen evolution while preventing MgTiP from being corroded by light.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Daniel Martin-Yerga, Jai White, Gunnar Henriksson, Ann Cornell
Summary: Organic hydroxyacids such as gluconic acid, with a high density of C-OH groups, show high reactivity for sustainable H-2 generation but low selectivity, while lactic acid has lower reactivity but higher selectivity in electro-oxidation reactions.
Article
Chemistry, Physical
Yu Xuan Leiu, Grayson Zhi Sheng Ling, Abdul Rahman Mohamed, Sibo Wang, Wee-Jun Ong
Summary: Photocatalysis is an important method for achieving sustainable energy production and environmental remediation. However, the large-scale application is hindered by photocorrosion and limited light absorption ability of photocatalysts. Zinc cadmium sulfide (ZCS) has gained attention in the past five years due to its flexible electrical and optical properties. This article reviews strategies for improving the light harvesting property and band structures of ZCS, including modifications and heterojunction formations with other semiconductors or cocatalysts. Challenges and new perspectives in photocatalysis are also discussed.
MATERIALS TODAY ENERGY
(2023)
Article
Chemistry, Physical
Hui Zhang, Yuqi Cao, Zonglin Li, Yang Gao, Li Shangguan, Jianhua Sun, Leiming Lang, Weiwei Lei
Summary: In this work, a fully condensed carbon nitride with a real 2D framework was successfully developed by post-calcining 1D GCN in a LiCl/KCl molten salt. The newly formed 2D molecular structure significantly promoted the charge transfer and separation, resulting in remarkably enhanced photocatalytic hydrogen production activity. Moreover, N-doped graphene quantum dots (NGQDs) incorporation can be simultaneously realized via the simple one-step co-dissolution and recrystallization method. Especially, the as-prepared 2D-CN/NGQDs sample presents a further increased photocatalytic hydrogen evolution rate up to about 30 times that of pristine GCN. The apparent quantum efficiency (AQE) for H2 evolution of 2D-CN/NGQDs reaches 36 % at 420 nm.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Physical
Lijun Hu, Zhichao Ding, Fei Yan, Yi-Meng Du, Qianxiang Xiao, Hongqing Wang
Summary: In this study, a concept of locally enriching superoxide radicals (& BULL;O2 ) on the PSI/C3N4 photocatalyst surface was proposed and achieved. Theoretical calculations and temperature-dependent photocatalytic studies showed that PSI on the C3N4 surface can act as a diffusion buffer for & BULL;O2 , capturing them through Van der Waals interactions and separating them by energy perturbations. As a result, a local enrichment of & BULL;O2 was established on the PSI/C3N4 surface during photocatalysis, leading to enhanced conversion of & BULL;O2 to H2O2. The PSI/C3N4-4 photocatalyst produced H2O2 at a rate approximately 2.4 and 2.65 times higher than pure C3N4 under visible light and LED irradiation, respectively. This study presents a promising strategy for enhancing photocatalytic H2O2 production efficiency by selectively enriching & BULL;O2 on the catalyst surface.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Applied
Junmin Huang, Jianmin Chen, Wangxi Liu, Jingwen Zhang, Junying Chen
Summary: This study successfully fabricated Cu-doped ZnS nanoframes using a rational fabrication strategy, which exhibited promising photocatalytic activity and stability for solar-light-driven hydrogen generation.
CHINESE JOURNAL OF CATALYSIS
(2022)
Review
Chemistry, Physical
Zhongxiao Li, Shi Fang, Haiding Sun, Ren-Jei Chung, Xiaosheng Fang, Jr-Hau He
Summary: Hydrogen, a zero-pollution, sustainable, low-cost, and high-efficiency energy source, has great potential for the 21st century. Solar water-splitting techniques, such as photovoltaic-electrolysis (PV-EC) and photoelectrochemistry (PEC), have shown promise with solar-to-hydrogen conversion efficiency over 10%. However, there is a gap between laboratory research and practical application, which can be addressed by understanding the basic principles, historical developments, and performing comprehensive techno-economic analysis.
ADVANCED ENERGY MATERIALS
(2023)
Review
Nanoscience & Nanotechnology
Benjamin D. Sherman, Nelli Klinova McMillan, Debora Willinger, Gyu Leem
Summary: Hydrogen production from water using renewable energy is an environmentally friendly zero-carbon fuel. Dye-sensitized solar cells offer a possible route to achieve solar-to-hydrogen systems with lower overall costs.
Article
Chemistry, Multidisciplinary
Yunxuan Wang, Xianzhi Meng, Yang Tian, Kwang Ho Kim, Linjing Jia, Yunqiao Pu, Gyu Leem, Deepak Kumar, Aymerick Eudes, Arthur J. Ragauskas, Chang Geun Yoo
Summary: Integrating plant genetic engineering with renewable deep eutectic solvents (DESs) led to the incorporation of PB-rich lignin into plant cell walls, resulting in enhanced release of fermentable sugars after DES pretreatment of mutant biomass. This approach shows promise for a sustainable closed-loop biorefinery system.
Article
Nanoscience & Nanotechnology
Sunghoon Yoo, Dong Hwan Nam, Thangjam Ibomcha Singh, Gyu Leem, Seunghyun Lee
Summary: The seed-mediated method is a general procedure for the synthesis of gold nanorods. In this study, the effect of two reducing agents, ascorbic acid and hydroquinone, on the growth process was investigated. It was found that by controlling the volume ratios of the reducing agents, gold nanorods with higher aspect ratios could be synthesized.
Article
Nanoscience & Nanotechnology
Soo Hyun Kim, Chaewon Lee, Gwi Ju Jang, Sunghoon Yoo, Seunghyun Lee, Sang Yun Han
Summary: By studying the biomolecular compositions of the hard lipid coronas formed around nanoparticles in the blood, we found that HDL components coat the nanosurfaces while neutral lipids participate in the corona formation due to their hydrophobic properties. Notably, cholesterol is significantly enriched in the coronas and its accumulation may play a critical role in the pathogenesis of multiple diseases.
ACS APPLIED NANO MATERIALS
(2022)
Article
Polymer Science
Tae Hyeong Kim, Dong Hwan Nam, Do-Hyun Kim, Gyu Leem, Seunghyun Lee
Summary: This study aims to increase the specific surface area of multi-walled carbon nanotubes (MWCNTs) by forming and removing metal oxide nanoparticles on their surfaces. Facile methods were used for particle formation and removal, and the resulting structures and crystallinity of the metal oxide particles were characterized. Surface area analysis and Raman spectroscopy were used to determine defect formation and the impact of different metals. The results showed an increase in surface area after removing the metal oxide particles, and the metal that induced the highest surface area was identified.
Article
Chemistry, Multidisciplinary
Thangjam Ibomcha Singh, Ashakiran Maibam, Dun Chan Cha, Sunghoon Yoo, Ravichandar Babarao, Sang Uck Lee, Seunghyun Lee
Summary: Introducing amorphous and ultrathin nanosheets of transition bimetal phosphate arrays as shells over an electronically modulated crystalline core can enhance the kinetics of the oxygen evolution reaction and hydrogen evolution reaction. The optimized electrocatalyst exhibits low overpotentials for both reactions and demonstrates remarkable overall water-splitting activity when used as both anode and cathode.
Review
Nanoscience & Nanotechnology
Bora Ye, Bora Jeong, Myeung-Jin Lee, Tae Hyeong Kim, Sam-Sik Park, Jaeil Jung, Seunghyun Lee, Hong-Dae Kim
Summary: This review comprehensively analyzes the properties required for SCR catalysts in different industries and the development strategies of high-performance and low-temperature vanadium-based catalysts. It discusses the advancements in catalyst composition, structure, dispersion, and side reaction suppression technology. The review also highlights the importance of understanding the usage of vanadium-based catalysts in stationary sources and the research trends related to nano-dispersion and catalyst structure in controlling side reactions.
Article
Chemistry, Multidisciplinary
Dun Chan Cha, Thangjam Ibomcha Singh, Ashakiran Maibam, Tae Hyeong Kim, Dong Hwan Nam, Ravichandar Babarao, Seunghyun Lee
Summary: Heteroatom-doped transition metal-oxides combined with metals of low hydrogen adsorption energy barrier can enhance the bifunctional activities and mitigate the low conductivity and high agglomeration of metal nanoparticles in a conductive carbon matrix. A 3D mesoporous heterostructure of boron-doped cobalt-oxide/cobalt-metal nanohybrids embedded in a nitrogen-doped carbon matrix is developed as a binder-free electrocatalyst for alkaline water-splitting. The electrocatalyst shows low overpotentials for both the oxygen evolution reaction and the hydrogen evolution reaction, along with excellent long-term durability.
Article
Chemistry, Multidisciplinary
Sunghoon Yoo, Goeun Youn, Hyunseung Lee, Jae-Sung Kwon, Youngbok Lee, Seunghyun Lee
Summary: Recently, the use of anisotropic plasmonic nanoparticles in nanomedicine has become increasingly popular. In this study, we successfully synthesized uniform ultra-small gold nanorods with high yield using hydroquinone as the reducing agent. By adjusting the volume of hydroquinone, we were able to control the growth rate of the gold nanorods. Additionally, by adjusting the volume of the gold precursor, we synthesized ultra-small gold nanorods with specific dimensions.
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Analytical
Yixuan Wu, Qian Yu, Younju Joung, Chang Su Jeon, Seunghyun Lee, Sung Hyun Pyun, Sang-Woo Joo, Lingxin Chen, Jaebum Choo
Summary: This study reports the development of a reproducible and highly sensitive surface-enhanced Raman scattering (SERS) substrate using a butanol-induced self-assembly of gold nanoparticles (AuNPs) and its application as a rapid diagnostic platform for SARS-CoV-2. The substrate showed strong electromagnetic enhancement of the Raman signals, enabling the detection of SARS-CoV-2 with a very low limit of detection (LoD) of 3.1 x 10(-15) M. This method provides sufficient sensitivity for SARS-CoV-2 screening assay and reduces the diagnostic time significantly. The results suggest the potential of this approach for developing rapid diagnostic platforms for other biomolecules and infectious diseases.
ANALYTICAL CHEMISTRY
(2023)
Review
Chemistry, Multidisciplinary
Manjinder Singh, Dun Chan Cha, Thangjam Ibomcha Singh, Ashakiran Maibam, Dasu Ram Paudel, Dong Hwan Nam, Tae Hyeong Kim, Sunghoon Yoo, Seunghyun Lee
Summary: Introducing complementary active materials in tandem as heterostructures can greatly improve the physicochemical properties. The use of amorphous materials with crystalline moieties as electrocatalysts has seen rapid growth. The combination of amorphous-crystalline-based materials allows for excellent bifunctional activity in hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). While crystalline materials have better properties, their limited activity due to surface confinement can be overcome by integrating amorphous materials. This review aims to provide comprehensive details on the fabrication, composition, and physicochemical properties of amorphous-crystalline heterostructures for water-splitting applications.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Materials Science, Multidisciplinary
Andrew H. Davis, Shuya Li, Hanjie Lin, Chun Chu, John M. Franck, Gyu Leem, Mathew M. Maye, Weiwei Zheng
Summary: The study presents a facile ligand-mediated synthesis method for preparing high-quality 2D CsPbX3 nanoplatelets with impressive optoelectronic properties. This versatile method can also be used to synthesize Mn-doped CsPbX3 nanoplatelets, showing increased emission efficiency with higher concentrations of Mn and Cl. The reaction, carried out in toluene under ambient conditions, offers a promising approach for industrial applications due to its simplicity and scalability.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
