Review
Chemistry, Multidisciplinary
Carlos Torres-Mendez, Martin Axelsson, Haining Tian
Summary: In recent years, the design, catalytic activity, and mechanism of synthetic molecular electrocatalysts for solar fuel production have attracted significant attention. Heterocyclic organic compounds have the potential to be tuned at the atomic level, allowing them to mimic the hydride transfer properties of biological systems.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Young Sun Park, Juwon Lee, Hyungsoo Lee, Juwon Yun, Gyumin Jang, Jeongyoub Lee, Sanguk Son, Chan Uk Lee, Chang-Seop Jeong, Subin Moon, Soobin Lee, Hyoung-il Kim, Jooho Moon
Summary: The lack of efficient photoanodes is a major challenge for unbiased solar-to-fuel conversion. In this study, solution-processed Sb2S3 nanorod arrays with improved optoelectronic properties and crystallographic orientation were obtained. Surface treatment with (NH4)(2)WS4 passivated the sulfur vacancy of Sb2S3 and enhanced charge extraction. An efficient hydrogen generation device was demonstrated using an Sb2S3 nanorod array-based photoanode for iodide oxidation and a perovskite-based photocathode, achieving a hydrogen production current density of 5.7 mA cm(-2) without external bias.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Sayuri Okunaka, Yugo Miseki, Kazuhiro Sayama
Summary: Simultaneously producing H-2 and hypochlorous acid on a semiconductor electrode using visible light is a breakthrough technology for sustainable energy conversion. Loading cobalt oxide onto a photoelectrode can significantly improve hypochlorous acid production, advancing the development of a solar energy conversion system.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Review
Chemistry, Physical
Songying Qu, Hao Wu, Yun Hau Ng
Summary: Hydrogen peroxide is a crucial chemical attracting attention for energy and environmental applications. The environmentally friendly solar-driven production of hydrogen peroxide, which only requires water, oxygen, and light energy, has gained the most attention. The rational design of functional photo-responsive catalysts promotes hydrogen peroxide production in photo(electro)catalytic approaches. This review systematically summarizes strategies for these catalysts and discusses prevailing hypotheses, state-of-the-art catalysts, critical challenges, and perspectives to enhance comprehension and promote interest in sustainable hydrogen peroxide production.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Lixia Pan, Jiazhe Wu, Xiaoya Xu, Fei Lv, Yubin Chen, Liejin Guo
Summary: Photoelectrochemical (PEC) water splitting is a promising way to convert solar energy into hydrogen energy. This study investigated the effect of concentrated light and reaction temperature on the PEC performance of CoPi/Mo:BiVO4 photoanode, and found that concentrated light can effectively enhance the photocurrent density, with the best performance achieved at high temperature.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Multidisciplinary Sciences
Yumin Zhang, Jianhong Zhao, Hui Wang, Bin Xiao, Wen Zhang, Xinbo Zhao, Tianping Lv, Madasamy Thangamuthu, Jin Zhang, Yan Guo, Jiani Ma, Lina Lin, Junwang Tang, Rong Huang, Qingju Liu
Summary: In this work, highly dispersed and large loading amount of copper single-atoms were successfully achieved on TiO2, exhibiting excellent photocatalytic hydrogen evolution performance and stability. Furthermore, it demonstrated an apparent quantum efficiency of 56% at 365 nm, representing a significant breakthrough in this field.
NATURE COMMUNICATIONS
(2022)
Review
Chemistry, Multidisciplinary
Michael R. Horn, Amandeep Singh, Suaad Alomari, Sara Goberna-Ferron, Raul Benages-Vilau, Nilesh Chodankar, Nunzio Motta, Kostya (Ken) Ostrikov, Jennifer MacLeod, Prashant Sonar, Pedro Gomez-Romero, Deepak Dubal
Summary: Polyoxometalates (POMs) are a class of nanomaterials with enormous promise for a range of energy-related applications, thanks to their unique structure and versatility that can enhance performance in energy devices and catalyst applications. Investigating structure-property-performance relationships and identifying determinant factors for energy systems can help unleash the potential of POMs across numerous fields, while also addressing pressing energy-related concerns through addressing challenges and opportunities.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Chemistry, Physical
Dongtian Sun, Weiqiang Fan, Fengfeng Wang, Yajie Bai, Hongye Bal, Weidong Shi
Summary: The novel BiVO4/Co1-XS photoanode significantly improved the PEC performance by enhancing conductivity, reaction kinetics, charge injection efficiency, and charge separation efficiency, leading to accelerated transfer speed of photogenerated carriers and higher solar energy conversion efficiency.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Qiang Wang, Xia Ma, Ping Wu, Bing Li, Lingxia Zhang, Jianlin Shi
Summary: The study introduced a novel integrated photoanode to enhance solar energy conversion efficiency and stabilize PEC water-splitting performance. By replacing WOR with GOR, nearly 100% Faradaic efficiency was achieved for the green energy conversion.
Article
Engineering, Environmental
Yun-Xiang Ma, Bin Gao, Jianping He, Jian-Fang Ma, Yanli Zhao
Summary: Hydrogen bonded metal-organic supramolecules have been designed as efficient cocatalysts for high-efficiency water oxidation photoanodes, significantly enhancing the water oxidation efficiency of BiVO4 nanoplate photoanodes. The Cu2L-modified BiVO4 photoanode showed approximately three times higher water oxidation efficiency compared to bare BiVO4 nanoplates, with stable activity maintained for three hours. Cu2L acts as an effective cocatalyst to promote holes on the photoanode surface to participate in the oxygen evolution reaction, improving the overall performance of the photoanode.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Min Hu, Ke Ye, Guozhen Zhang, Xiyu Li, Jun Jiang
Summary: The catalytic activity of the oxygen/hydrogen evolution reaction (OER/HER) on dual-site catalysts on graphene has been studied using density functional theory calculations. The results show that both the maximum free energy change (Delta GMax) and the activity barrier (Ea) must be considered in evaluating the catalytic activity of the OER/HER on the dual site. Importantly, there is a negative relationship between Delta GMax and Ea, which is essential for the rational design of effective dual-site catalysts for electrochemical reactions.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Lunjie Liu, Mei-Yan Gao, Haofan Yang, Xiaoyan Wang, Xiaobo Li, Andrew I. Cooper
Summary: Conjugated organic materials have been studied as photocatalysts for solar fuels synthesis, with DE7 polymer discovered as an efficient catalyst for H2O2 production. Focus is needed on improving the photostability and initial catalytic production rates of organic photocatalysts.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Review
Chemistry, Multidisciplinary
Yudong Xue, Yunting Wang, Zhenhua Pan, Kazuhiro Sayama
Summary: This paper reviews recent developments in EC/PEC H2O2 production through water oxidation, including fundamental aspects, benchmark activity evaluation, material/catalyst selection, and strategies for increasing selectivity, efficiency, and accumulation. The challenges and outlook for water oxidation in H2O2 production are also discussed, with a focus on device-level development, accumulation and stability, and industrial applications. The review aims to inspire further research in improving EC/PEC H2O2 production.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Hyejin Kim, Kyuin Shim, Kyoung Eun Lee, Jeong Woo Han, Yongfa Zhu, Wonyong Choi
Summary: This study designed organic photocatalysts that can produce H2O2 without organic electron donors. The incorporation of O and P elements in CN structure (CNO, CNP, CNOP) increases visible light absorption and hinders photodecomposition of H2O2, leading to CNOP exhibiting the highest production of H2O2 using dioxygen, water, and visible light only.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Multidisciplinary Sciences
Zhenhua Li, Lan Luo, Min Li, Wangsong Chen, Yuguang Liu, Jiangrong Yang, Si-Min Xu, Hua Zhou, Lina Ma, Ming Xu, Xianggui Kong, Haohong Duan
Summary: Photoelectrochemical cells have been proposed as promising tools for C-H functionalisation and H2 production. In this work, a photoelectrocatalytic strategy using an oxygen-vacancy-rich TiO2 photoanode was developed for efficient production of organic halides. This approach demonstrated broad substrate scope and high productivity using seawater as the electrolyte and chloride ions source.
NATURE COMMUNICATIONS
(2021)
Review
Biochemistry & Molecular Biology
Selvaraj Barathi, Nadana Sabapathi, Kandasamy Nagarajan Aruljothi, Jin-Hyung Lee, Jae-Jin Shim, Jintae Lee
Summary: Small RNA (sRNA) has emerged as a potential tool in biotechnology for sustainable agriculture and environmental management. Plants produce sRNA to silence genes of pests and immune inhibitory proteins, while microbial networks can detect toxic elements and enhance degradation of pollutants. Bacterial and plant sRNA systems can synergistically establish a sustainable eco-agriculture system, replacing xenobiotic pesticides and chemical remediation elements. This review highlights the applications of sRNA in sustained agriculture and bioremediation, along with recommendations for future improvements.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Polymer Science
Deivasigamani Ranjith Kumar, Kuppusamy Rajesh, Mostafa Saad Sayed, Ahamed Milton, Jae-Jin Shim
Summary: In this study, diphenylamine was electropolymerized on an electrochemically reduced graphene oxide/glass carbon surface, enhancing the sensitivity, selectivity, and detection limit for D-penicillamine detection. The developed electrode showed excellent electrochemical sensing ability for D-penicillamine determination and demonstrated potential suitability in bio-clinical applications.
Article
Chemistry, Multidisciplinary
Srinivasan Kesavan, Deivasigamani Ranjith Kumar, Ganesh Dhakal, Woo Kyoung Kim, Yong Rok Lee, Jae-Jin Shim
Summary: This study aimed to develop a poly(caffeic acid) (p-CFA) coated electrochemically reduced graphene oxide (ERGO) surface for selective detection of free chlorine. The p-CFA@ERGO/GC electrode exhibited superior electrocatalytic performance for free chlorine determination, with a wide detection range (20 μM to 20 mM), high sensitivity (0.0361 μA μM-1), and low detection limit (0.03 μM). The p-CFA@ERGO/GC electrode demonstrated good recovery for real water samples such as commercial and tap water, consistent with the results of the standard reagent method.
Review
Chemistry, Multidisciplinary
Nazish Parveen, Mohammad Omaish Ansari, Sajid Ali Ansari, Pramod Kumar
Summary: Electrochemical supercapacitors have become widely used in electronic, medical, and industrial applications due to their impressive power output. The design of electrode materials, particularly nanostructured ones, plays a crucial role in the performance of supercapacitors. Among the various materials, titanium nitride (TiN) is considered ideal for efficient supercapacitors due to its high stability, electrical conductivity, and unique electronic structure. This paper reviews recent advancements in nanostructured TiN electrode materials for supercapacitors, including their challenges and future opportunities.
Article
Infectious Diseases
Varish Ahmad, Mohammad Omaish Ansari
Summary: In this investigation, a reduced graphene oxide-coated zinc oxide-copper (rGO@ZnO-Cu) nanocomposite with broad-spectrum antimicrobial potential was prepared. The nanocomposite exhibited big, irregular rods, rectangular and spherical-shaped ZnO, and anchored clusters of aggregated Cu particles. The rGO@ZnO-Cu complex showed antimicrobial activity against both Gram-positive and Gram-negative bacteria, with greater effectiveness against Staphylococcus aureus.
Article
Biochemistry & Molecular Biology
Mohammad Oves, Mohammad Omaish Ansari, Mohammad Shahnawaze Ansari, Adnan Memic
Summary: The rise of antimicrobial resistance has increased the demand for the next generation of antimicrobial coatings. In this study, graphene@curcumin-copper coatings were prepared using a chemical synthesis method and characterized by scanning electron microscopy and X-ray photon scattering. The coatings showed uniform distribution of curcumin and copper, and exhibited antimicrobial properties through contact-killing mechanisms, potentially reducing the risk of nosocomial infections.
Article
Polymer Science
Aftab Aslam Parwaz Khan, Mallikarjunagouda B. Patil, Laxmibai P. Rathod, Shivalila G. Vader, Pankaj Raizada, Pardeep Singh, Maha M. Alotaibi, Mohammad Omaish Ansari, Anish Khan, Naved Azum, Malik Abdul Rub, Muhammad Nadeem Arshad, Abdullah M. Asiri
Summary: The study assessed the potential of nanocomposite membranes (NCMs) made of sodium alginate and embedded with synthesized zeolitic imidazole framework-8 (ZIF-8) as fillers for separating gaseous mixtures generated by methane reforming. ZIF-8 crystals were synthesized through hydrothermal synthesis, with sizes ranging from 50 to 70 nm. NCMs with 15% filler loading (synthesized ZIF-8) outperformed neat polymer membranes in terms of H-2 permeability and selectivity, achieving a purity of up to 95%. However, NCMs did not perform better than neat polymer membranes in separating gas mixtures. The combination of ZIF-8 and sodium alginate as fillers is a new and worth investigating.
Article
Polymer Science
Rashida Jafer, Sarah A. A. Alsufyani, Javed Iqbal, Mohammad Omaish Ansari, Arshid Numan, Shahid Bashir, P. M. Z. Hasan, S. Wageh
Summary: In this study, a silver/graphene/polypyrrole/nickel hydroxide (Ag/GN/PPy/Ni(OH)(2)) nanocomposite was synthesized through a combination of oxidative polymerization and hydrothermal processes. The nanocomposite exhibited morphological characteristics of Ni(OH)(2) flakes and silver particles attached to the PPy globules, along with the presence of GN sheets and spherical silver particles. The electrochemical investigations showed that the nanocomposite electrode displayed the highest specific capacity and excellent cyclic stability when used in a supercapattery.
Article
Chemistry, Multidisciplinary
Le Nhu Minh Tue, Sumanta Sahoo, Ganesh Dhakal, Van Hoa Nguyen, Jintae Lee, Yong Rok Lee, Jae-Jin Shim
Summary: Metal sulfides (MS) and mixed metal sulfides (MTMS), such as NiCo2S4 and 2D MS MoS2, were synthesized through a solvothermal process and used as electrodes for supercapacitors. The resulting electrode showed excellent coulombic efficiency, high specific capacitance, superior energy density, and ultra-high cycling stability. The hybrid supercapacitor device also exhibited impressive coulombic efficiency and good cycling stability, as well as decent energy density over a large number of cycles.
Article
Chemistry, Multidisciplinary
Bandar. A. A. Al-Mur, Mohammad Omaish Ansari
Summary: We synthesized a silver anchored and pTSA doped polyaniline/molybdenum disulfide nanocomposite for room temperature detection of ammonia and methanol. The nanocomposite showed high reproducibility and better sensing response compared to the individual components. The high electrical conductivity of the nanocomposite is attributed to the interactions between polyaniline and molybdenum disulfide, conductive silver, and the anionic dopant. The sensing mechanism involves chemisorption/desorption and electrical compensation.
Review
Chemistry, Physical
Aveen Mustafa Mohammed, Mohammad R. Thalji, Suhad A. Yasin, Jae-Jin Shim, Kwok Feng Chong, Alexander A. Guda, Gomaa A. M. Ali
Summary: The accumulation of heavy metals in aquatic environments is a significant environmental threat. Adsorption using nanofiber has been proven to be the most effective approach for their removal, providing a potential solution for various applications.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Tensangmu Lama Tamang, Sumanta Sahoo, Jae-Jin Shim
Summary: To design high-performance hybrid supercapacitors, this study proposes the use of hollow ternary mixed metal sulfides as the positive electrode and iron oxide-decorated nitrogen-doped reduced graphene oxide as the negative electrode. The positive electrode exhibits high specific capacity and excellent rate capability, while the negative electrode shows maximum specific capacity. The hybrid device composed of these electrodes demonstrates impressive energy density, providing a facile strategy for optimizing and integrating electrode materials for efficient energy storage in hybrid supercapacitors.
JOURNAL OF POWER SOURCES
(2023)
Article
Physics, Applied
Aftab Aslam Parwaz Khan, Z. Fadil, Pankaj Raizada, Pardeep Singh, Maha Alotaibi, Mohammad Omaish Ansari, Anish Khan, Abdullah M. Asiri, Chaitany Jayprakash Raorane
Summary: A monolayer anthracene-like nanostructure was studied through Monte Carlo simulations to determine its compensation temperature and magnetic hysteresis cycle. The effects of exchange coupling on compensation and transition temperatures were discussed. The study also investigated the magnetic hysteresis cycles and surface of multi-loop hysteresis with respect to strong exchange coupling and temperature parameters. This research has significant implications for multi-state memories and nanotechnology.
Article
Chemistry, Multidisciplinary
Rajesh Kumar, Sumanta Sahoo, Ednan Joanni, Raghvendra Pandey, Jae-Jin Shim
Summary: Vacancies play a crucial role in determining the behavior of materials and researchers have introduced vacancies into 2D materials to achieve high-performance electrodes for energy storage. This article focuses on recent advances in vacancy engineering of 2D materials for supercapacitors and secondary batteries. Vacancy defects enhance charge-transfer processes and serve as additional host sites for ion diffusion. The article also summarizes the development of defect creation approaches and detection techniques for vacancies in these materials.
CHEMICAL COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Raj Karthik, Ramaraj Sukanya, Shen Ming Chen, Mahmudul Hasan, Ganesh Dhakal, P. Muhammed Shafi, Jae-Jin Shim
Summary: In this work, a heterostructure based on amorphous nickel boride (NiXB) and crystalline square bar-like manganese molybdate (MnMoO4) was prepared. The NiXB/MnMoO4 hybrid exhibited excellent electrochemical performance with high specific capacitance, capacity retention, and cyclic stability, making it a promising material for advanced energy storage devices.
ACS APPLIED MATERIALS & INTERFACES
(2023)
