Review
Chemistry, Physical
Shelly Singla, Surbhi Sharma, Soumen Basu, Nagaraj P. Shetti, Tejraj M. Aminabhavi
Summary: This review highlights the environmentally friendly hydrogen production using carbon-based nanomaterials through photochemical and photoelectrochemical processes by water splitting. Various carbon materials like graphene, graphene oxide, carbon nanotubes, graphitic carbon nitride, and fullerenes are discussed for their photocatalytic properties and applications in hydrogen production. The advantages and shortcomings of these materials, along with their production methods and critical discussions, are covered in this article.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Applied
Zaixiang Xu, Yang Li, Yongyong Cao, Renfeng Du, Zhikang Bao, Shijie Zhang, Fangjun Shao, Wenkai Ji, Jun Yang, Guilin Zhuang, Shengwei Deng, Zhongzhe Wei, Zihao Yao, Xing Zhong, Jianguo Wang
Summary: By using alkali-assisted C3N4 as photocatalyst in a water/alcohol mixture solvent, high-efficiency production of H2O2 with a concentration of 113 mmol L-1 can be achieved. The results suggest that alcohol provides and stabilizes center dot OOH radicals, while trace water triggers the photocatalytic production of H2O2 by completely consuming center dot OOH radicals, contributing to the high-efficiency production of H2O2.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Review
Materials Science, Multidisciplinary
Ping Niu, Junjing Dai, Xiaojuan Zhi, Zhonghui Xia, Shulan Wang, Li Li
Summary: Graphitic carbon nitride (GCN) has shown great potential as a photocatalyst for overall water splitting, with breakthrough progress being made in this dynamic research field. Modulating the activity of GCN can lead to more efficient photocatalytic water splitting, offering new ideas and methods for the design of advanced photocatalysts in the future.
Review
Green & Sustainable Science & Technology
Rishabh Sharma, Miroslav Almasi, Satya Pal Nehra, Vikrant Singh Rao, Priyanka Panchal, Devina Rattan Paul, Indra Prabh Jain, Anshu Sharma
Summary: The exponentially increasing population leads to high energy demands and resource utilization, making the earth an unsustainable habitat. Utilizing renewable energy for water splitting and hydrogen generation can reduce carbon footprint and satisfy energy demands. However, existing photocatalysts still face challenges in terms of activity and stability.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Hongxiang Chu, Ruofan Li, Di Zeng, Wenjing Wang, Bingkun Cui, Taikang Jia, Ling Zhang, Wenzhong Wang
Summary: This study successfully synthesized BiOBr nanosheets with oxygen vacancies by a solvothermal method, and the nanosheets exhibited good performance in photocatalytic H2O2 production.
CHEMICAL COMMUNICATIONS
(2023)
Review
Engineering, Chemical
M. Sumon Reza, Nurnazurah Binti Haji Ahmad, Shammya Afroze, Juntakan Taweekun, Mohsen Sharifpur, Abul Kalam Azad
Summary: This study investigates the use of carbon-based materials to enhance the production efficiency of hydrogen through photocatalytic water splitting, and explores the significance of co-catalysts and sacrificial agents in increasing hydrogen production.
CHEMICAL ENGINEERING & TECHNOLOGY
(2023)
Review
Chemistry, Multidisciplinary
Nithinraj Panangattu Dharmarajan, Devthade Vidyasagar, Jae-Hun Yang, Siddulu Naidu Talapaneni, Jangmee Lee, Kavitha Ramadass, Gurwinder Singh, Mohammed Fawaz, Prashant Kumar, Ajayan Vinu
Summary: The study on water splitting for hydrogen production using visible light photocatalytic method is considered as a sustainable approach, with carbon nitride being one of the most promising catalysts. The supramolecular self-assembly synthesis of carbon nitride offers a simple and eco-friendly method to produce high surface area carbon nitride with superior morphological features.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Adeem Ghaffar Rana, Michael Schwarze, Minoo Tasbihi, Xavier Sala, Jordi Garcia-Anton, Mirjana Minceva
Summary: In this study, exfoliated graphitic carbon nitride loaded with non-noble metals was synthesized and tested for hydrogen production. Among the different synthesis methods, the colloidal deposition method showed the best performance for Ni-loaded ex-g-CN with a hydrogen production rate of 43.6 μmol h(-1) g(-1).
Article
Chemistry, Multidisciplinary
Yangsen Xu, Mingjian Fan, Wenjuan Yang, Yonghao Xiao, Lingting Zeng, Xiao Wu, Qinghua Xu, Chenliang Su, Qianjun He
Summary: Achieving an NIR-active polymeric carbon nitride by incorporating carbon and potassium dopants in a homogeneous manner has shown high photocatalytic activity for hydrogen generation and potential applications in solar energy and cancer therapy.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Physical
Fei Yu, Quanhua Deng, Haiping Li, Yuguo Xia, Wanguo Hou
Summary: This study proposes a universal strategy to enhance the OER activity of PCN-based photocatalysts by synthesizing single-atom metal-oxygen doped PCN through electrostatic adsorption of oxometallate anions on protonated amorphous melon. The MO structure functions as OER active centers and enhances photoexcited charge separation by introducing hole-trapping doping levels in bandgaps.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Kejian Li, Qiuyue Ge, Yangyang Liu, Longqian Wang, Kedong Gong, Juan Liu, Lifang Xie, Wei Wang, Xuejun Ruan, Liwu Zhang
Summary: Microdroplet photocatalysis shows a significantly higher efficiency in H2O2 synthesis compared to the bulk phase counterpart. The size of the microdroplets and the microdroplet air-water interfaces play a crucial role in accelerating the photocatalytic reaction rates. The ultra-strong electric field and partial solvation at the microdroplet air-water interfaces improve both electron-hole separation efficiency and charge transfer efficiency.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Engineering, Environmental
Zhiwei Liang, Xiaojia Zhuang, Zicheng Tang, Quanhua Deng, Haiping Li, Wenbing Kang
Summary: By fabricating high-crystalline PCN flake composed porous nanotubes, a balance between surface area and crystallinity can be achieved, resulting in prominently enhanced visible light absorption, charge separation and transport, and photocatalytic water splitting activity.
CHEMICAL ENGINEERING JOURNAL
(2022)
Review
Energy & Fuels
Osman Polat, Nurettin Sahiner
Summary: Solar energy, as the largest renewable energy source, can be used for photocatalytic water splitting (PWS) to produce hydrogen. PWS has made significant advancements in recent years, including the application of different catalysts and systems.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Hao Luo, Tianshang Shan, Jianwen Zhou, Liulian Huang, Lihui Chen, Rongjian Sa, Yusuke Yamauchi, Jungmok You, Yusuke Asakura, Zhanhui Yuan, He Xiao
Summary: Solar-driven photocatalytic route for H2O2 production has gained attention. Carbon ring incorporated hollow g-C3N4 tubes (CHCN) with significantly higher H2O2 yield than bulk g-C3N4 were successfully fabricated. The optimized CHCN catalyst demonstrated efficient ORR routes for H2O2 production. This work provides a new strategy for efficient H2O2 formation and explores the mechanism of the ORR process for highly efficient H2O2 generation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Chenxiang Lin, Chaozheng Han, Lei Gong, Xin Chen, Jinxia Deng, Dongdong Qi, Yongzhong Bian, Kang Wang, Jianzhuang Jiang
Summary: This study demonstrates the successful enhancement of photocatalytic activity through the preparation of donor-acceptor type covalent organic framework (COF) hybrids. The obtained hybrids showed high H2 evolution rate without the need for noble metals, reaching 11.73 mmol g(-1) h(-1), which can be further increased to 26.04 mmol g(-1) h(-1) with Pt as a co-catalyst. Experimental methods combined with theoretical calculations confirmed the efficient charge separation and excellent photocatalytic activity of the TBTA/g-C3N4 hybrids.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Sadiya Alka, Shafinaz Shahir, Norahim Ibrahim, Dai-Viet N. Vo, Fazilah Abd Manan
Summary: This study demonstrates that M. foliorum enhances arsenic uptake in Melastoma malabathricum plants and reduces arsenic toxicity, leading to increased plant growth.
BIOREMEDIATION JOURNAL
(2023)
Article
Chemistry, Applied
Pham Thi Thuy Phuong, Nguyen Nguyen Phuong, P. Senthil Kumar, Nguyen Phuc Hoang Duy, Quyet Van Le, Le Thi Bao Ngoc, A. A. Jalil, Saravanan Rajendran, Chin Kui Cheng, Thanh-Huong Nguyen, Minh Tuan Nguyen Dinh, Dai-Viet N. Vo
Summary: CO2 reforming of methanol for producing hydrogen was experimentally studied using a fixed-bed reactor with 10%Ni/SiO2 catalyst. The catalyst was fully reduced and had a surface area of 240.5 m(2)/g during H-2 activation. The methanol conversion significantly improved from 52% to 99% with increasing temperature from 450 to 550 degrees C due to the endothermic nature of CO2 reforming. The H-2/CO ratios ranged from 1.65 to 1.76 at different reaction temperatures, which are preferred for long-chain hydrocarbons generation in Fischer-Tropsch production. The catalytic activity remained stable within 8 hours on-stream due to the maintenance of Ni-0 metallic phase during CO2 reforming of methanol. The catalytic deterioration was not observed because of the concomitant CO2 gasification of surface carbonaceous species during reaction.
TOPICS IN CATALYSIS
(2023)
Article
Chemistry, Applied
Minhaj Uddin Monir, Azrina Abd Aziz, Kaykobad Md Rezaul Karim, Fatema Khatun, Mostafa Tarek, Abu Yousuf, Dai-Viet N. Vo
Summary: The purpose of this research is to evaluate the intent of empty fruit bunches of palm oil (EFBpalm oil) to catalytic gasification of wood produced charcoal (Wood(charcoal)) in order to inform the large-scale application of Wood(charcoal) as a possible gasification feedstock. Co-catalyst of bismuth oxide (Bi2O3) was also used in this study to obtain syngas. The findings suggest that catalytic gasification of empty palm fruit bunches using Wood(charcoal) and Bi2O3 has the potential to improve the production of syngas.
TOPICS IN CATALYSIS
(2023)
Article
Environmental Sciences
Lalitha Gnanasekaran, R. Suresh, Saravanan Rajendran, Wei-Hsin Chen, Matias Soto-Moscoso
Summary: In this study, the degradation efficiency of textile dyes by pure cobalt oxide and nickel cobaltite under visible light irradiation was investigated. The synthesized nickel cobaltite showed higher crystallinity and visible light absorption compared to pure cobalt oxide. The excellent degradation efficiency of nickel cobaltite makes it a promising visible light catalyst.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Devaraj Manoj, Saravanan Rajendran, Mu. Naushad, Madhappan Santhamoorthy, F. Gracia, Matias Soto Moscoso, M. A. Gracia-Pinilla
Summary: In this study, mesoporous copper oxide (CuO) nanocrystals decorated on TiO2 nanostructures were successfully synthesized to form p-n heterojunction nanocomposites. The resulting CuO-TiO2 nanocomposite showed good electrochemical performance on modified GC electrode, enabling efficient oxidation of catechol with wide linear range and excellent sensing properties, capable of detecting catechol in real samples like lake and river water.
ENVIRONMENTAL RESEARCH
(2023)
Review
Energy & Fuels
Rajendran Nandhini, Baskaran Sivaprakash, Natarajan Rajamohan, Dai-Viet N. Vo
Summary: The drastic changes in climate conditions have expedited the need for emission reduction techniques to combat global warming. Conventional technologies have limitations in reducing carbon emissions. Carbon neutrality, which involves deriving energy and fuels from fossil origins without greenhouse gas emissions, is considered crucial. This review focuses on the transition to carbon neutrality through the production of carbon-free energies such as hydrogen and bioenergy, with an emphasis on the integration of renewable energy resources like solar and wind power. The utilization of photosynthetic microalgae, particularly Chlorella vulgaris, for CO2 mitigation is highlighted, along with the potential for capturing and converting carbon into valuable byproducts. The review also explores the economic feasibility and environmental outlook of innovative carbon reduction technologies, including artificial photosynthesis, convective vortex systems, and integrated multi-energy systems.
Review
Chemistry, Applied
R. Suresh, Saravanan Rajendran, Kuan Shiong Khoo, Matias Soto-Moscoso
Summary: In recent years, there has been a significant increase in research studies on enzyme immobilized materials for water pollution monitoring and remediation. This review examines the use of enzymes immobilized on nanomaterials for electrochemical sensing and biocatalytic degradation of water pollutants. Advantages and methods of enzyme immobilization on nanomaterials are discussed, as well as the sensing performances and biocatalytic properties of these materials towards various organic pollutants. The review also highlights the significance of nanomaterials in enzymatic sensing and catalytic degradation, identifies current challenges, and provides directions for further research.
TOPICS IN CATALYSIS
(2023)
Review
Environmental Sciences
R. Suresh, Saravanan Rajendran, Lalitha Gnanasekaran, Pau Loke Show, Wei-Hsin Chen, Matias Soto-Moscoso
Summary: This review investigates the application of PVDF-based nanomembranes in the removal of synthetic dyes. Various methods, including surface coating and blending, were discussed for fabricating high performance PVDF-based nanomembranes. The incorporation of nanomaterials such as metal compounds, metals, (synthetic/bio)polymers, metal organic frameworks, carbon materials and their composites in PVDF membranes to enhance their performance was also explored. The impact of nanomaterials on the surface features, mechanical strength, hydrophilicity, crystallinity, and catalytic ability of PVDF membranes was discussed, along with future research directions.
Article
Environmental Sciences
Azalea Dyah Maysarah Satya, Wai Yan Cheah, Sara Kazemi Yazdi, Yu-Shen Cheng, Kuan Shiong Khoo, Dai-Viet N. Vo, Xuan Dong Bui, Meththika Vithanage, Pau Loke Show
Summary: Water usage is increasing due to its finite amount and competitiveness, leading to the need for water recirculation in industries. The circular bioeconomy highlights the importance of reusing and recycling materials, and microalgae is an ideal source for this approach due to its fast growth, adaptability, and ability to consume nutrients. This review investigates the potential of microalgae biomass cultivated in wastewater and its role in the circular bioeconomy, focusing on the production of goods from wastes contaminated with emerging pollutants. The aim is to provide new insights to researchers and industrial stakeholders interested in green alternatives and contribute to environmental sustainability.
ENVIRONMENTAL RESEARCH
(2023)
Review
Environmental Sciences
Hong-Ha T. Nguyen, Ha Tran Nguyen, Shams Forruque Ahmed, Natarajan Rajamohan, Mohammad Yusuf, Ajit Sharma, Priya Arunkumar, Balakrishnan Deepanraj, Huu-Tuan Tran, Adel Al-Gheethi, Dai-Viet N. Vo
Summary: The significant increase in global energy consumption has led to environmental concerns, especially regarding the management of waste fly ash generated by thermal power plants. Utilizing fly ash for producing value-added products, such as zeolite and geopolymer materials, has gained interest for environmental treatment. Fly ash-derived geopolymer and zeolite materials exhibited greater heavy metal ions removal compared to conventional carbon-based adsorbents.
ENVIRONMENTAL RESEARCH
(2023)
Article
Biotechnology & Applied Microbiology
Jihan Nabillah Hanun, Fahir Hassan, Ledy Theresia, How-Ran Chao, Ha Manh Bu, Saravanan Rajendran, Navish Kataria, Chi -Fu Yeh, Pau Loke Show, Kuan Shiong Khoo, Jheng-Jie Jiang
Summary: Microplastics undergo physical and chemical changes upon aging, leading to deteriorated surface morphology and degradation through oxidation. Freshwater-aged microplastics had the highest specific surface area (SBET), indicating increased surface reactivity. Oxybenzone showed higher adsorption onto aged microplastics compared to virgin microplastics, with hydrophobic interactions and hydrogen bonding as the main mechanisms.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Environmental Sciences
Hassan Karimi-Maleh, Yuezhen Liu, Zhangping Li, Rozhin Darabi, Yasin Orooji, Ceren Karaman, Fatemeh Karimi, Mehdi Baghayeri, Jalal Rouhi, Li Fu, Sadegh Rostamnia, Saravanan Rajendranj, Afsaneh L. Sanati, Hasan Sadeghifar, Masoumeh Ghalkhanim
Summary: In this study, a highly sensitive DNA biosensor based on ZIF-8/Co/rGO/C3N4 nanohybrid modification of a screen-printed carbon electrode (SPCE) was fabricated to monitor the herbicide PND in real samples. The biosensor successfully quantified PND in a wide concentration range and showed a low detection limit. Molecular docking analysis confirmed the experimental findings and provided important insights for the development of highly sensitive DNA biosensors for monitoring toxic herbicides.
Review
Thermodynamics
Priyanka Saha, Faysal Ahamed Akash, Shaik Muntasir Shovon, Minhaj Uddin Monir, Mohammad Tofayal Ahmed, Mohammad Forrukh Hossain Khan, Shaheen M. Sarkar, Md. Kamrul Islam, Md. Mehedi Hasan, Dai-Viet N. Vo, Azrina Abd Aziz, Md. Jafar Hossain, Rafica Akter
Summary: Despite the global generation deficit, energy remains the linchpin for economic development. Hydrogen can serve as an alternative energy source that meets the requirements of emitting minimal impurities and being safe for both the environment and humans. Growing greenhouse gas emissions and the increasing utilization of renewable energy sources have rekindled interest in hydrogen. It can be utilized as a renewable energy storage, stabilizing the power system and aiding in its decarbonization, particularly in industrial and transportation sectors. This study aims to describe various methods of hydrogen production based on different energy sources. Additionally, it discusses the financial and ecological implications of three key hydrogen colors (gray, blue, and green). The future prosperity of hydrogen relies heavily on technological advancements, cost reductions, as well as future objectives and related legislation. To enhance this research, new hydrogen production methods, innovative storage systems, infrastructure, and carbon-free hydrogen generation should be developed.
INTERNATIONAL JOURNAL OF GREEN ENERGY
(2023)
Review
Engineering, Environmental
Michelle Mei Xue Lum, Kim Hoong Ng, Sin Yuan Lai, Abdul Rahman Mohamed, Abdulkareem Ghassan Alsultan, Yun Hin Taufiq-Yap, Mei Kee Koh, Mohamad Azuwa Mohamed, Dai-Viet N. Vo, Manjulla Subramaniam, Kyle Sebastian Mulya, Nathasya Imanuella
Summary: Air pollution from untreated sulfur dioxide-rich flue gas is a major environmental and human health issue. Many sulfur dioxide removal technologies have been developed, but conventional methods generate by-products. Catalytic reduction of sulfur dioxide offers a sustainable solution with high efficiency and the recovery of valuable solid sulfur. This review discusses recent advances and the potential of this technology.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Environmental
Fazil Qureshi, Mohammad Yusuf, Muhammad Tahir, Moinul Haq, Montaha Mohamed Ibrahim Mohamed, Hesam Kamyab, Dai-Viet N. Vo, Hussameldin Ibrahim
Summary: The urgent need to address greenhouse gas emissions is driving the demand for new sustainable renewable fuels like hydrogen. The production of hydrogen from biomass presents complex challenges, but nanomaterials show promise in overcoming some of these obstacles. Financial considerations and technological hurdles also play a significant role in commercializing hydrogen as a fuel.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
