4.6 Article

Fabrication of erbium-doped spherical-like ZnO hierarchical nanostructures with enhanced visible light-driven photocatalytic activity

期刊

MATERIALS LETTERS
卷 91, 期 -, 页码 1-4

出版社

ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2012.09.049

关键词

Semiconductors; Nanocrystalline materials; Microstructure; Optical materials and properties

资金

  1. Universiti Sains Malaysia [854001]

向作者/读者索取更多资源

Erbium-doped spherical-like ZnO hierarchical nanostructures (Er/ZnO) were newly synthesized via a facile and surfactant-free chemical solution route. Field emission scanning electron microscopy and transmission electron microscopy observations showed that the assemblies were composed of large amounts of interleaving nanosheets with the thickness of about 15 nm. X-ray diffraction and energy dispersive X-ray results revealed that Er ion was successfully doped into ZnO. The Er doping increased the visible light absorption and a red shift appeared in UV-vis diffuse reflection spectra for Er/ZnO. Photoluminescence spectra showed that the improvement of visible emission in the Er/ZnO was a result of oxygen vacancy of defect increased by addition of Er in ZnO. The photocatalytic tests revealed that Er/ZnO was a new promising photocatalyst in remediation of water contaminated by organic pollutants under visible light irradiation. (c) 2012 Elsevier B.V. All rights reserved.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

Article Energy & Fuels

Investigation of synergy and inhibition effects during co-gasification of tire char and biomass in CO2environment

Pooya Lahijani, Maedeh Mohammadi, Abdul Rahman Mohamed

Summary: This study investigates the co-gasification of tire char and rambutan peel. The results show that high proportion of tire char inhibits the gasification reaction, while higher content of biomass promotes the reaction. In addition, natural catalysts in the biomass also have a synergistic effect on the reaction.

BIOMASS CONVERSION AND BIOREFINERY (2022)

Article Environmental Sciences

Development of microwave-assisted nitrogen-modified activated carbon for efficient biogas desulfurization: a practical approach

Norhusna Mohamad Nor, Lau Lee Chung, Abdul Rahman Mohamed

Summary: The utilization of microwave heating and nitrogen-modification can generate adsorbents with superior performance for efficient removal of hydrogen sulfide (H2S). The modified palm shell activated carbon synthesized using microwave heating exhibited excellent properties, including a large surface area and new pore structures. Microwave heating assisted in the development of the adsorbent's properties and contributed to high removal of H2S at low adsorption temperature.

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2023)

Article Environmental Sciences

Competitive removal mechanism to simultaneously incarcerate bisphenol A, triclosan and 4-tert-octylphenol within beta-cyclodextrin crosslinked citric acid used for encapsulation in polypropylene membrane protected-micro-solid-phase extraction

Hafiz Rozaini, Bahruddin Saad, Jun Wei Lim, Noorfatimah Yahaya, Muggundha Raoov Ramachandran, Nur Diyan Mohd Ridzuan, Worapon Kiatkittipong, Visweswara Rao Pasupuleti, Sze Mun Lam, Jin Chung Sin

Summary: Endocrine disrupting compounds (EDCs) are widely distributed and have a severe impact on human health. β-cyclodextrin crosslinked citric acid (BCD-CA) has been used as an adsorbent and shown to possess selective adsorption properties and high stability and water retention capacity in water medium. The competitive adsorption mechanism of BCD-CA with EDCs is mainly achieved through chemisorption, and adsorption of 4-tert-octylphenol is most favorable.

CHEMOSPHERE (2022)

Article Engineering, Environmental

Machine learning approaches to predict the photocatalytic performance of bismuth ferrite-based materials in the removal of malachite green

Zeeshan Haider Jaffari, Ather Abbas, Sze-Mun Lam, Sanghun Park, Kangmin Chon, Eun-Sik Kim, Kyung Hwa Cho

Summary: This study focuses on the potential capability of numerous machine learning models to predict the photocatalytic degradation of malachite green. The CatBoost model outperformed others and showed that the photocatalytic reaction conditions were more important than the material properties.

JOURNAL OF HAZARDOUS MATERIALS (2023)

Article Chemistry, Physical

3-D/3-D Z-Scheme Heterojunction Composite Formed by Marimo-like Bi2WO6 and Mammillaria-like ZnO for Expeditious Sunlight Photodegradation of Dimethyl Phthalate

Ying-Hui Chin, Jin-Chung Sin, Sze-Mun Lam, Honghu Zeng, Hua Lin, Haixiang Li, Liangliang Huang, Abdul Rahman Mohamed

Summary: In this study, a novel 3D/3D Z-scheme heterojunction composite was fabricated and evaluated for the photocatalytic degradation of dimethyl phthalate (DMP). The optimized composite exhibited significantly higher photodegradation rate constants compared to pure ZnO and Bi2WO6. The formation of a Z-scheme photocatalytic system in the composite reduced charge carrier recombination and enhanced photoactivity. The composite also demonstrated good stability and potential application in the degradation of refractory pollutants in environmental remediation.

CATALYSTS (2022)

Article Chemistry, Inorganic & Nuclear

Fabrication of novel Z-scheme BaFe2O4/BiOCl nanocomposite with promoted visible light photocatalytic palm oil mill effluent treatment and pathogens destruction

Jin-Han Tan, Jin-Chung Sin, Sze-Mun Lam, Hua Lin, Haixiang Li, Liangliang Huang, Abdul Rahman Mohamed

Summary: Organic pollution and biological hazards have become significant environmental issues. Semiconductor-based photocatalysis is a promising solution to minimize their negative impacts. In this study, novel Z-scheme BaFe2O4/BiOCl nanocomposites were fabricated as efficient visible light-driven photocatalysts. The nanocomposites showed improved photocatalytic activity due to the formation of a Z-scheme heterojunction, leading to enhanced charge transfer and active radical generation. The nanocomposites also exhibited good recyclability and the ability to degrade various organics and inactivate bacteria from wastewater.

INORGANIC CHEMISTRY COMMUNICATIONS (2023)

Review Chemistry, Inorganic & Nuclear

Methods and strategies for producing porous photocatalysts: Review

Bashaer Mahmoud Namoos, Abdul Rahman Mohamed, Khozema Ahmed Ali

Summary: The desire to improve photocatalytic activity is increasing, especially in semiconductors. Porous photocatalysts have been synthesized to improve surface area and reduce recombination of electron-hole pairs. This paper reviews recent works on porous photocatalysts, with a focus on synthesis and fabrication methods. The topotactic transition technique is the best method for metal oxide porous photocatalysts, while self-organizing blocks are the best method for polymeric porous photocatalysts, especially for growing and fixing 1D semiconductor nanomaterials on 3D and 2D semiconductors on 2D. The hard template method allows for better control of particle shape and size, but the template removal is non-ecofriendly, making the soft template method more favorable. The etching method, on the other hand, is suitable for fabricating porous photocatalysts through a membrane by utilizing the electrical charge created by moving electrons in the electrolyte as a driving force.

JOURNAL OF SOLID STATE CHEMISTRY (2023)

Article Energy & Fuels

Low thermal pre-treatment of palm kernel expeller to enhance microalgal hydrogen production

Khairun Nadia Muhamad, Nurul Tasnim Sahrin, Raid Abdulrahman Alakeel, Rabbani Syed, Fatima Musa Ardo, Jia Min Woon, Wen Nee Tan, Chin Kui Cheng, Zakariyya Uba Zango, Chii-Dong Ho, Sze Mun Lam, Jin Chung Sin, Kuan Shiong Khoo, Worapon Kiatkittipong, Jun Wei Lim

Summary: The production of hydrogen from microalgae using palm kernel expeller (PKE) as feedstock was studied. A low thermal pre-treatment method using hydrolysis process was used to improve the hydrogen yield. The results showed that the maximum hydrogen yield was achieved using PKE pre-treated at 90 degrees C for 4 h, with a two-fold increase compared to untreated PKE. The release of inhibitory compounds increased significantly at 50 degrees C, and the kinetics of microalgal hydrogen production followed a zeroth order model.
Review Engineering, Environmental

Sulfur dioxide catalytic reduction for environmental sustainability and circular economy: A review

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 Environmental Sciences

Treatment of diluted palm oil mill effluent (POME) synchronous with electricity production in a persulfate oxidant-promoted photocatalytic fuel cell

Chun-Ting Joyee Yap, Sze-Mun Lam, Jin-Chung Sin, Honghu Zeng, Haixiang Li, Liangliang Huang, Hua Lin

Summary: Due to the high pollution of palm oil mill effluent (POME) generated as a result of the prosperous production growth of palm oil in Malaysia, there is an increasing concern for environmental conservation. To address this issue, a cutting-edge photocatalytic fuel cell (PFC) system incorporating ZnO/Zn nanorod array (NRA) photoanode, CuO/Cu cathode, and persulfate (PS) oxidant was successfully designed for the treatment of POME and simultaneous energy production. The PFC/PS system exhibited exceptional performance, achieving high COD removal efficiency, open circuit voltage, short circuit current density, and power density under optimal conditions. The stability, durability, and economic viability of the PFC system were also confirmed through recycling tests and electrical energy efficiency assessment. These findings contribute to enhancing the sustainability and economic viability of palm oil production.

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2023)

Review Chemistry, Multidisciplinary

Retrospective insights into recent MXene-based catalysts for CO2 electro/photoreduction: how far have we gone?

Xin-Quan Tan, Wuwei Mo, Xinlong Lin, Jian Yiing Loh, Abdul Rahman Mohamed, Wee-Jun Ong

Summary: The electro/photocatalytic CO2 reduction reaction (CO2RR) is an important approach for the synthesis of renewable fuels and value-added chemicals. MXenes, a type of 2D transition metal carbides, nitrides, and carbonitrides, show great potential in electrocatalysis and photocatalysis due to their unique properties. This review provides an overview of recent advances in MXene-based catalysts for the electrocatalytic and photocatalytic CO2RR, including their structure, synthesis pathways, and activity enhancement strategies. The review also discusses the current state of research in the field and proposes future perspectives.

NANOSCALE (2023)

Article Engineering, Environmental

A metal-free electrochemically exfoliated graphene/graphitic carbon nitride nanocomposite for CO2 photoreduction to methane under visible light irradiation

Maher T. Alshamkhani, Lutfi Kurnianditia Putri, Pooya Lahijani, Keat Teong Lee, Abdul Rahman Mohamed

Summary: In this study, an electrochemically exfoliated graphene/graphite carbon nitride ((EG)/g-C3N4) heterojunction photocatalyst was synthesized for CO2 photoreduction to methane. The best-performing photocatalyst (0.075 EG-CN) showed a significant enhancement in CH4 production with 98.6% selectivity after 6 hours of light irradiation compared to pure CN. The developed photocatalyst exhibited high stability after consecutive cycles of CO2 photoreduction to CH4.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2023)

Article Engineering, Environmental

Construction of delaminated Ti3C2 MXene/NiFe2O4/V2O5 ternary composites for expeditious pollutant degradation and bactericidal property

Sze-Mun Lam, Man-Kit Choong, Jin-Chung Sin, Honghu Zeng, Liangliang Huang, Lin Hua, Haixiang Li, Zeeshan Haider Jaffari, Kyung Hwa Cho

Summary: This study successfully decomposed Rhodamine B dye, Staphylococcus aureus, and Bacillus cereus using a novel composite material. The composite showed improved photoactivity and the Ti3C2 MXene acted as an outstanding co-catalyst. Experimental evidence revealed that hydroxyl and superoxide anion radicals played pivotal roles in the photodegradation of RhB dye. Furthermore, the real-world viability of the composite material was demonstrated.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2022)

Review Chemistry, Physical

Point-to-face contact heterojunctions: Interfacial design of 0D nanomaterials on 2D g-C3N4 towards photocatalytic energy applications

Xin-Quan Tan, Sue-Faye Ng, Abdul Rahman Mohamed, Wee-Jun Ong

Summary: This article introduces the recent advances in experimental and computational studies on the interfacial design of 0D nanostructures on 2D graphitic carbon nitride (g-C3N4). By engineering point-to-face contact between 2D g-C3N4 and 0D nanomaterials, heterojunction interfaces can be formed, which is beneficial for photocatalytic reactions. Different types of 0D nanostructures and synthesis strategies for photocatalytic applications are discussed.

CARBON ENERGY (2022)

Article Engineering, Environmental

Ameliorated photodegradation performance of polyethylene and polystyrene films incorporated with ZnO-PVP catalyst

Sze-Mun Lam, Kai-Chin Chew, Jin-Chung Sin, Honghu Zeng, Hua Lin, Haixiang Li, Jun Wei Lim, Abdul Rahman Mohamed

Summary: This study demonstrates an effective method for the degradation of common plastic films, such as polyethylene (PE) and polystyrene (PS), using zinc oxide (ZnO) modified by polyvinylpyrrolidone (PVP) under direct sunlight. The incorporation of PVP reduces the particle size and extends the optical response range of the ZnO samples, leading to prominent solid phase photodegradation of the plastic films. The high surface area of ZnO-PVP improves the interaction with the plastic film texture, enhancing the charge mobility for the degradation process.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2022)

Article Materials Science, Multidisciplinary

F-doped Co3O4 with Pt-like activity and excellent stability for hydrogen evolution reaction in alkaline media

Deyong Zheng, Huihui Jin, Yucong Liao, Pengxia Ji

Summary: In this study, a highly stable and efficient catalyst, fluorine-doped Co3O4 (F-Co3O4), was developed for hydrogen production by water electrolysis. The F-Co3O4 catalyst exhibited a remarkable reduction in overpotential and demonstrated excellent stability for over 100 hours.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

Effect of the addition of Cu6Sn5 nanoparticles on the growth of intermetallic compounds at the interfaces of Sn3.0Ag0.5Cu solder joints

Ziwen Lv, Jintao Wang, Fengyi Wang, Jianqiang Wang, Fuquan Li, Hongtao Chen

Summary: Adding Cu6Sn5 nano particles can effectively inhibit the overgrowth of intermetallic compounds at the interfaces of solder joints in electronic devices, providing a solution to this issue. A new growth mechanism of intermetallic compounds at the interfaces was identified.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

BiOI/AgI/Ag plasmonic heterostructure for efficient photoelectrochemical water splitting

Jun Wang, Jiawei Chen, Wanru Liao, Fangyang Liu, Min Liu, Liangxing Jiang

Summary: A BiOI/AgI/Ag plasmonic heterostructure photocathode was successfully designed through electrodeposition, ion-exchange, and illumination methods. This photocathode exhibits superior performance in photoelectrochemical water splitting.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

Ni@O-doped carbon Mott-Schottky heterojunctions to enhance sulfur conversion kinetics

Xiaoxiao Liu, Xianxian Zhou, Xiaotao Ma, Qinbo Yuan, Shibin Liu

Summary: In this study, the authors propose a method to accelerate the reaction of polysulfides in lithium-sulfur batteries using a Ni@OC Mott-Schottky heterojunction as a catalyst. The experimental results demonstrate that the charge redistribution at the Ni@OC interface accelerates electron transfer and enhances catalytic activity, leading to improved reaction kinetics and battery performance.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

Effect of fixture boundary conditions for low-velocity impact: A focus on composites with different matrix and fibers

Dayou Ma, Mohammad Rezasefat, Joziel Aparecido da Cruz, Sandro Campos Amico, Marco Giglio, Andrea Manes

Summary: The matrix has a significant effect on the impact resistance of composite materials. Replacing a brittle polymer with a more flexible one can improve impact resistance, but it poses challenges to standard testing methods. This study designs a new fixture for testing the low-velocity impact of soft composites and investigates the effect of the fixture on the mechanical performance.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

Synergistic effect of defects and heterostructures endowing bronze titanium dioxide with superior lithium storage performances

Lingchang Wang, Qihang Yang, Huzhen Li, Ming Wei, Qian Wang, Zhenzhong Hu, Mengmeng Zhen

Summary: Bronze titanium dioxide (TiO2(B)) is a promising anode material for lithium-ion batteries due to its high specific capacity. However, its practical applications are hindered by poor conductivity and limited electrochemical kinetics. In this study, TiO2(B)-carbon nanosheets heterostructures are synthesized to enhance the cycling performance and rate capability of TiO2(B).

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

Sustained electromagnetic parameters of barium ferrite and epoxy nanocomposites for patch antenna miniaturization over GHz frequency range

Atul Thakur, Ritesh Verma, Ankush Chauhan, Fayu Wan, Preeti Thakur

Summary: In this study, BaFe12O19 and BaFe12O19: Epoxy (50:50) nanocomposites were synthesized using the co-precipitation method. The structural information and material properties, such as crystallite size and electrical conductivity, were characterized by XRD, FESEM, EDX, and TEM techniques.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

In-situ construction of CoS2@NC hierarchical binder-free cathode for advanced Li-CO2 batteries

Jingyu Wu, Xinyan Ma, Yong Yang

Summary: A well-defined CoS2@NC(CS-500) hierarchical binder-free catalyst cathode is constructed through in-situ grown of ZIF-67 on carbon cloth and high-temperature carbonization. The cathode shows excellent reaction kinetics and electrochemical performance, providing inspiration for developing advanced Li-CO2 battery catalysts.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

K5Eu1-xHox(MoO4)4: Structures and luminescence properties

Svetlana M. Posokhova, Vladimir A. Morozov, Kirill N. Boldyrev, Dina Deyneko, Erzhena T. Pavlova, Bogdan I. Lazoryak

Summary: This study explores the impact of synthesis method and composition on the structure and luminescence properties of K5Eu1-xHox(MoO4)4 with the palmierite-type matrix. The co-doping of Eu3+ and Ho3+ ions plays a critical role in manipulating charge transfer and luminescence efficiency in the visible and infrared regions.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

Benzonitrile/pyridylbenzoimidazole hybrid electron-transport material for efficient phosphorescence and TADF OLEDs

Jian Wang, Yeting Tao, Jingsheng Wang, Youtian Tao

Summary: A new electron-transport material iTPyBI-CN is developed through non-catalytic C-N coupling reaction. It exhibits better electroluminescence efficiency in organic light-emitting diodes compared to the commercial material TPBI, due to its twisted geometry and higher energy levels.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

Microscopic characteristics and thermodynamic property changes in limestone under high-temperature treatment

Tao Zhu, Feng Huang, Shuo Li, Yang Zhou

Summary: This article combines XRD analysis and microscopic structural observation to investigate the changes in limestone after high-temperature treatment. It finds that 500 degrees C is the critical temperature for crystalline and spatial arrangement changes in limestone, and the thermal conductivity, specific heat capacity, and heat storage coefficient gradually decrease after thermal treatment.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

Novel synthesis of ZnO nanostructure from galvanization waste for antibacterial application

Muhammad Haekal Habibie, Fransiska Sri Herwahyu Krismastuti, Abdi Wira Septama, Faiza Maryani, Vivi Fauzia

Summary: This study focuses on the synthesis of zinc oxide nanostructure from zinc recovered from galvanization ash and highlights its potential as a sustainable source of zinc and as an antibacterial agent.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

Biomimetic mineralization engineered phycocyanin with improved stability and antioxidantive activity under environmental stress

Jingyi Li, Yixin Xing, Wei Gu, Shousi Lu

Summary: In this study, PC@CaP microparticles were fabricated using biomimetic mineralization. The results showed that under environmental stress, PC@CaP exhibited improved stability and antioxidative activity, indicating its potential use in high-added value fields.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

ZIF-8 nanoparticles combined with fibroin protein co-modified TiO2 nanotube arrays to construct a drug sustained-release platform

Yan Liu, Shunyou Chen

Summary: In this study, TNTs were used as a drug carrier and modified with ZIF-8 and silk fibroin to obtain a new drug loading platform. The results showed that this drug-loaded platform had a good drug release effect in vitro and could promote cell proliferation and osteogenic differentiation.

MATERIALS LETTERS (2024)

Article Materials Science, Multidisciplinary

Observation of stacking faults in ε-phase InSe crystal

Chunhui Zhu, Wentao Wang, Qing Zhen, Xinning Huang, Shixin Li, Shaochang Wang, Xiaoping Ma, Xiaoxia Liu, Yalong Jiao, Kai Sun, Zhuangzhi Li, Huaixin Yang, Jianqi Li

Summary: A type of stacking fault is revealed in e-InSe crystal, which is associated with a small stacking-fault energy and shows exceptional plasticity.

MATERIALS LETTERS (2024)