1
|
Xian W, Liu Y, Qi Q, Liu H, Wang Y, Chen C. The role of solution temperature in characteristics of TiO 2 nanotube arrays prepared on Ti foil in acid solution. RSC Adv 2024; 14:8790-8800. [PMID: 38495983 PMCID: PMC10941092 DOI: 10.1039/d4ra00875h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2024] [Accepted: 03/08/2024] [Indexed: 03/19/2024] Open
Abstract
The characteristics of TiO2 nanotube arrays (TNTs) prepared on Ti foil in sulfuric acid solution that contains Cl- under different temperatures are investigated by field emission scanning electron microscopy (FESEM), electrochemical impedance spectroscopy (EIS), Mott-Schottky measurement and Raman spectra. The solution temperature significantly affects the morphologies of TNTs, i.e., when solution temperature rises from -10 °C to 90 °C, the inner diameter of the nanotube increases and the barrier layer thickness decreases, and, as TNTs display n-type semiconductive properties, the donor density (ND) and corrosion protection decrease. Two types (types I and II) of pulse temperature are used to fabricate TNTs, in which type I is firstly anodized at a low temperature for time t, and then increases to a high temperature. While for type II, the solution temperature order is opposite to that of type I. The ND of TNTs in the case of type I is lower than ND of TNTs in the case of type II. ND decreases with the increased pulse step time for type I, while ND increases with the increased pulse step time for type II.
Collapse
Affiliation(s)
- Wenhao Xian
- Emergency Science Research Institute, China Coal Research Institute Beijing China
| | - Yingjie Liu
- Emergency Science Research Institute, China Coal Research Institute Beijing China
| | - Qingjie Qi
- Emergency Science Research Institute, China Coal Research Institute Beijing China
| | - Han Liu
- Emergency Science Research Institute, China Coal Research Institute Beijing China
| | - Yue Wang
- Emergency Science Research Institute, China Coal Research Institute Beijing China
| | - Changbin Chen
- Emergency Science Research Institute, China Coal Research Institute Beijing China
| |
Collapse
|
2
|
Emmanuel A, Yang M, Xu T, Shen Q, Sun C. Metal-organic frameworks incorporated with C 3N 4: A visible light enhanced platform for degradation of polybromodiphenyl ethers. J Environ Sci (China) 2023; 134:44-54. [PMID: 37673532 DOI: 10.1016/j.jes.2022.04.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Revised: 04/09/2022] [Accepted: 04/26/2022] [Indexed: 09/08/2023]
Abstract
A series of nano-photocatalysts metal-organic frameworks (MOFs)/graphitic carbon nitride (CN) (named MOFCN-x) with high activity have been synthesized by in-situ growth method. Under visible light irradiation, MOFCN-x hybrids show enhanced photocatalytic activity for the debromination of polybromodiphenyl ethers (PBDEs) compared with CN. Among all the hybrids, MOFCN-2 shows the highest reaction rate, which is 3.3 times as high as that in CN. MOFCN-x photocatalysts own stable visible light activity after recycled experiment. It indicates that a moderate amount of MOFs in MOFCN-x can largely enhance the photocatalytic ability by improved visible light absorption, larger specific surface area and better photo-generated charge carriers separation and transfer capabilities. More interestingly, the debromination pathway of PBDEs by MOFCN-x shows obvious selectivity compared with pure CN that bromines at meta-positions are much more susceptible than those at the para- and ortho-positions. The possible photoreductive mechanism has been proposed. This study shows that nanocomposite MOFCN can be an excellent candidate for dealing with halogen pollutants by solar-driven.
Collapse
Affiliation(s)
- Akese Emmanuel
- School of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing 312000, China
| | - Meiying Yang
- School of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing 312000, China
| | - Tingting Xu
- School of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing 312000, China
| | - Qi Shen
- School of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing 312000, China; School of Chemistry and Chemical Engineering, Institute of New Energy, Shaoxing University, Shaoxing 312000, China.
| | - Chunyan Sun
- School of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing 312000, China.
| |
Collapse
|
3
|
Ayanda OS, Quadri RO, Adewuyi SO, Mmuoegbulam AO, Okezie O, Mohammed SE, Durumin-Iya NI, Lawal OS, Popoola KM, Adekola FA. Multidimensional applications and potential health implications of nanocomposites. JOURNAL OF WATER AND HEALTH 2023; 21:1110-1142. [PMID: 37632385 PMCID: wh_2023_141 DOI: 10.2166/wh.2023.141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/28/2023]
Abstract
This study reviews the concept, classifications, and techniques involved in the synthesis of nanocomposites. The environmental and health implications of nanoparticles and composite materials were detailed, as well as the applications of nanocomposites in water remediation, antibacterial application, and printed circuit boards. The study gave insights into the challenges of water pollution treatment and provided a broad list of nanocomposites that have been explored for water remediation. Moreover, the emergence of multi-drug resistance to many antibiotics has made current antibiotics inadequate in the treatment of disease. This has engineered the development of alternative strategies in the drug industries for the production of effective therapeutic agents, comprising nanocomposites with antibacterial agents. The new therapeutic agents known as nanoantibiotics are more efficient and have paved the way to handle the challenges of antibiotic resistance. In printed circuit boards, nanocomposites have shown promising applications because of their distinct mechanical, thermal, and electrical characteristics. The uniqueness of the write-up is that it provides a broad explanation of the concept, synthesis, application, toxicity, and harmful effects of nanocomposites. Thus, it will provide all-inclusive awareness to readers to identify research gaps and motivate researchers to synthesize novel nanocomposites for use in various fields.
Collapse
Affiliation(s)
- Olushola S Ayanda
- Nanoscience Research Unit, Department of Industrial Chemistry, Federal University Oye-Ekiti, Oye-Ekiti, Ekiti State P.M.B 373, Nigeria E-mail:
| | - Rukayat O Quadri
- Nanoscience Research Unit, Department of Industrial Chemistry, Federal University Oye-Ekiti, Oye-Ekiti, Ekiti State P.M.B 373, Nigeria
| | - Sulaiman O Adewuyi
- Nanoscience Research Unit, Department of Industrial Chemistry, Federal University Oye-Ekiti, Oye-Ekiti, Ekiti State P.M.B 373, Nigeria
| | - Augusta O Mmuoegbulam
- Department of Microbiology, Faculty of Biological Sciences, University of Calabar, Calabar, Nigeria
| | - Onyemaechi Okezie
- Department of Microbiology, Faculty of Biological Sciences, University of Calabar, Calabar, Nigeria
| | - Sa'adatu E Mohammed
- Department of Chemistry, Federal University Dutse, Dutse, Jigawa State PMB 7156, Nigeria
| | - Naseer I Durumin-Iya
- Department of Chemistry, Federal University Dutse, Dutse, Jigawa State PMB 7156, Nigeria
| | - Olayide S Lawal
- Nanoscience Research Unit, Department of Industrial Chemistry, Federal University Oye-Ekiti, Oye-Ekiti, Ekiti State P.M.B 373, Nigeria
| | - Kehinde M Popoola
- Department of Plant Science and Biotechnology, Federal University Oye-Ekiti, Oye-Ekiti, Ekiti State, Nigeria
| | - Folahan A Adekola
- Department of Industrial Chemistry, University of Ilorin, Ilorin, Nigeria
| |
Collapse
|
4
|
Eshete M, Li X, Yang L, Wang X, Zhang J, Xie L, Deng L, Zhang G, Jiang J. Charge Steering in Heterojunction Photocatalysis: General Principles, Design, Construction, and Challenges. SMALL SCIENCE 2023. [DOI: 10.1002/smsc.202200041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Affiliation(s)
- Mesfin Eshete
- Hefei National Research Center for Physical Sciences at the Microscale School of Chemistry and Materials Science University of Science and Technology of China Jinzhai Road 96 Hefei Anhui 230026 P. R. China
- Department of Industrial Chemistry College of Applied Sciences Nanotechnology Excellence Center Addis Ababa Science and Technology University P.O. Box 16417 Addis Ababa Ethiopia
| | - Xiyu Li
- Hefei National Research Center for Physical Sciences at the Microscale School of Chemistry and Materials Science University of Science and Technology of China Jinzhai Road 96 Hefei Anhui 230026 P. R. China
| | - Li Yang
- Hefei National Research Center for Physical Sciences at the Microscale School of Chemistry and Materials Science University of Science and Technology of China Jinzhai Road 96 Hefei Anhui 230026 P. R. China
| | - Xijun Wang
- Hefei National Research Center for Physical Sciences at the Microscale School of Chemistry and Materials Science University of Science and Technology of China Jinzhai Road 96 Hefei Anhui 230026 P. R. China
| | - Jinxiao Zhang
- College of Chemistry and Bioengineering Guilin University of Technology 12 Jian'gan Road Guilin Guangxi 541004 P. R. China
| | - Liyan Xie
- A Key Laboratory of the- Ministry of Education for Advanced- Catalysis Materials Department of Chemistry Zhejiang Normal University Jinhua Zhejiang 321004 P. R. China
| | - Linjie Deng
- Hefei National Research Center for Physical Sciences at the Microscale School of Chemistry and Materials Science University of Science and Technology of China Jinzhai Road 96 Hefei Anhui 230026 P. R. China
| | - Guozhen Zhang
- Hefei National Research Center for Physical Sciences at the Microscale School of Chemistry and Materials Science University of Science and Technology of China Jinzhai Road 96 Hefei Anhui 230026 P. R. China
| | - Jun Jiang
- Hefei National Research Center for Physical Sciences at the Microscale School of Chemistry and Materials Science University of Science and Technology of China Jinzhai Road 96 Hefei Anhui 230026 P. R. China
| |
Collapse
|
5
|
Fu Q, Wang C, Chen J, Wang Y, Li C, Xie Y, Zhao P, Fei J. BiPO4/BiOCl/g-C3N4 heterojunction based photoelectrochemical sensing of dopamine in serum samples. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2022.130456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
6
|
Idrees S, Jamil LA, Omer KM. Silver-Loaded Carbon and Phosphorous Co-Doped Boron Nitride Quantum Dots (Ag@CP-BNQDs) for Efficient Organic Waste Removal: Theoretical and Experimental Investigations. ACS OMEGA 2022; 7:37620-37628. [PMID: 36312368 PMCID: PMC9609080 DOI: 10.1021/acsomega.2c04480] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Accepted: 10/07/2022] [Indexed: 06/16/2023]
Abstract
In this paper, silver-loaded phosphorous and carbon co-doped boron nitride quantum dot (Ag@CP-BNQD) nanocomposites were synthesized using a co-precipitation method followed by a hydrothermal approach. The nanocomposites of Ag@CP-BNQDs were characterized by scanning electron microscopy, energy-dispersive spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, and ultraviolet-visible spectrophotometry. The as-prepared Ag@CP-BNQDs were used for photocatalytic degradation of 10 common organic pollutants, including dyes, pharmaceuticals, and pesticides in aqueous solution under visible light irradiation. The high-performance photocatalysis of Ag@CP-BNQDs proved that Ag@CP-BNQDs is plasmonic and the n-p junction photocatalyst. Theoretical calculations were done to measure the crystals and electronic structures of Ag@CP-BNQDs. Theoretical results showed that loading of Ag behaves as plasmonic sensitizers and co-catalysts and provides extra bands, which make electron movement easier between valance and conduction bands. The mechanism of the charge separation enhancement was postulated. Our findings might deepen our understanding of how sensitizer surface modification works in photodegradation applications.
Collapse
Affiliation(s)
- Shinwar
A. Idrees
- Department
of Chemistry, Faculty of Science, University
of Zakho, Kurdistan Region, Zakho 42002, Iraq
| | - Lazgin A. Jamil
- Department
of Chemistry, Faculty of Science, University
of Zakho, Kurdistan Region, Zakho 42002, Iraq
| | - Khalid M. Omer
- Dept.
of Chemistry, College of Science, University
of Sulaimani, Kurdistan Region, Slemani 46002, Iraq
| |
Collapse
|
7
|
Enhanced photocatalytic degradation of Acid Blue dye using CdS/TiO 2 nanocomposite. Sci Rep 2022; 12:5759. [PMID: 35388044 PMCID: PMC8986795 DOI: 10.1038/s41598-022-09479-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 03/02/2022] [Indexed: 11/18/2022] Open
Abstract
Photocatalytic degradation is essential for the successful removal of organic contaminants from wastewater, which is important for ecological and environmental safety. The advanced oxidation process of photocatalysis has become a hot topic in recent years for the remediation of water. Cadmium sulphide (CdS) nanostructures doped with Titanium oxide (CdS/TiO2) nanocomposites has manufactured under ambient conditions using a simple and modified Chemical Precipitation technique. The nanocomposites crystal structure, thermal stability, recombination of photo-generated charge carriers, bandgap, surface morphology, particle size, molar ratio, and charge transfer properties are determined. The production of nanocomposites (CdS-TiO2) and their efficient photocatalytic capabilities are observed. The goal of the experiment is to improve the photocatalytic efficiency of TiO2 in the visible region by doping CdS nanocomposites. The results showed that as-prepared CdS-TiO2 nanocomposites has exhibited the highest photocatalytic activity in the process of photocatalytic degradation of AB-29 dye, and its degradation efficiency is 84%. After 1 h 30 min of visible light irradiation, while CdS and TiO2 showed only 68% and 09%, respectively. The observed decolorization rate of AB-29 is also higher in the case of CdS-TiO2 photocatalyst ~ 5.8 × 10−4mol L−1 min−1) as compared to the reported decolorization rate of CdS ~ 4.5 × 10−4mol L−1 min−1 and TiO2 ~ 0.67 × 10−4mol L−1 min−1. This increased photocatalytic effectiveness of CdS-TiO2 has been accomplished by reduced charge carrier recombination as a result of improved charge separation and extension of TiO2 in response to visible light.
Collapse
|
8
|
Sharma P, Nanda K, Yadav M, Shukla A, Srivastava SK, Kumar S, Singh SP. Remediation of noxious wastewater using nanohybrid adsorbent for preventing water pollution. CHEMOSPHERE 2022; 292:133380. [PMID: 34953871 DOI: 10.1016/j.chemosphere.2021.133380] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 12/13/2021] [Accepted: 12/18/2021] [Indexed: 06/14/2023]
Abstract
Removal of toxic elements from wastewater effluent has got a lot of attention because of their severe negative effects on human and environmental health. In the past few years, rapid urbanization and industrial activities in developing countries have exacerbated the destruction of the environment. Most of the wastewater effluents are discharged untreated or inadequately treated, which has become a major concern due to its impact on sustainability and the environment. This is imperative to implement, innovative and resourceful wastewater treatment technologies requiring low investment. Among the various treatment technologies, cutting-edge processes in nano-material sciences have recently piqued the interest of scientists. Nanohybrid absorbents have the potential in improving wastewater treatment and increase water supply by utilizing unconventional water resources. Carbon nanotubes, titanium oxide, manganese oxide, activated carbon (AC), magnesium oxide, graphene, ferric oxides, and zinc oxide are examples of nano-adsorbents that are used to eliminate pollutants. This also demonstrated the effective removal of contaminants along with the harmful effects of chemicals, colorants, and metals found in wastewater. The present manuscript examines potential advances in nanotechnology in wastewater treatment for the prevention of water and soil pollution. This systematic review aims to highlight the importance of nanohybrid absorbents treatment technology for wastewater treatment and to explain how nanohybrid absorbents have the potential to revolutionize industrial pollution. There are also other published review articles on this topic but the present review covers an in-depth information on nano-adsorbents and their targeted contaminants.
Collapse
Affiliation(s)
- Pooja Sharma
- CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nagpur, 440 020, India.
| | - Kavita Nanda
- Plant Molecular Biology Laboratory, Department of Botany, Dayanand Anglo-Vedic (PG) College, Chhatrapati Shahu Ji Maharaj University, Kanpur, 208 001, India
| | - Mamta Yadav
- Plant Molecular Biology Laboratory, Department of Botany, Dayanand Anglo-Vedic (PG) College, Chhatrapati Shahu Ji Maharaj University, Kanpur, 208 001, India
| | - Ashutosh Shukla
- Plant Molecular Biology Laboratory, Department of Botany, Dayanand Anglo-Vedic (PG) College, Chhatrapati Shahu Ji Maharaj University, Kanpur, 208 001, India
| | - Sudhir Kumar Srivastava
- Chemical Research Laboratory, Department of Chemistry, Dayanand Anglo-Vedic (PG) College, Chhatrapati Shahu Ji Maharaj University, Kanpur, 208001, India
| | - Sunil Kumar
- CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nagpur, 440 020, India.
| | - Surendra Pratap Singh
- Plant Molecular Biology Laboratory, Department of Botany, Dayanand Anglo-Vedic (PG) College, Chhatrapati Shahu Ji Maharaj University, Kanpur, 208 001, India.
| |
Collapse
|
9
|
Studies on Electron Escape Condition in Semiconductor Nanomaterials via Photodeposition Reaction. MATERIALS 2022; 15:ma15062116. [PMID: 35329568 PMCID: PMC8955374 DOI: 10.3390/ma15062116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 03/07/2022] [Accepted: 03/10/2022] [Indexed: 12/10/2022]
Abstract
In semiconductor material-driven photocatalysis systems, the generation and migration of charge carriers are core research contents. Among these, the separation of electron-hole pairs and the transfer of electrons to a material’s surface played a crucial role. In this work, photodeposition, a photocatalysis reaction, was used as a “tool” to point out the electron escaping sites on a material’s surface. This “tool” could be used to visually indicate the active particles in photocatalyst materials. Photoproduced electrons need to be transferred to the surface, and they will only participate in reactions at the surface. By reacting with escaped electrons, metal ions could be reduced to nanoparticles immediately and deposited at electron come-out sites. Based on this, the electron escaping conditions of photocatalyst materials have been investigated and surveyed through the photodeposition of platinum. Our results indicate that, first, in monodispersed nanocrystal materials, platinum nanoparticles deposited randomly on a particle’s surface. This can be attributed to the abundant surface defects, which provide driving forces for electron escaping. Second, platinum nanoparticles were found to be deposited, preferentially, on one side in heterostructured nanocrystals. This is considered to be a combination result of work function difference and existence of heterojunction structure.
Collapse
|
10
|
Sharma SK, Kumar A, Sharma G, Vo DVN, García-Peñas A, Moradi O, Sillanpää M. MXenes based nano-heterojunctions and composites for advanced photocatalytic environmental detoxification and energy conversion: A review. CHEMOSPHERE 2022; 291:132923. [PMID: 34813851 DOI: 10.1016/j.chemosphere.2021.132923] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 10/26/2021] [Accepted: 11/14/2021] [Indexed: 05/22/2023]
Abstract
Extensive research is being done to develop multifunctional advanced new materials for high performance photocatalytic applications in the field of energy production and environmental detoxification, MXenes have emerged as promising materials for enhancing photocatalytic performance owing to their excellent mechanical properties, appropriate Fermi levels, and adjustability of chemical composition. Numerous experimental and theoretical research works implied that the dimensions of MXenes have a significant impact on their performance. For photocatalysis to thrive in the future, we must understand the current state of the art for MXene in different dimensions. Using MXene co-catalysts in widely used in photocatalytic applications such as CO2 reduction, hydrogen production and organic pollutant oxidation, this study focuses on the most recent developments in MXenes based materials, structural modifications, innovations in reaction and material engineering. It has been reported that using 5 mg of CdS-MoS2-MXene researchers were able to generate as high as 9679 μmol/g/h hydrogen under visible light. The MXenes based heterojunction photocatalyst Co3O4/MXene was utilized to degrade 95% bisphenol A micro-pollutant in just 7 min. Numerous novel materials, their preparations and performances have been discussed. Depending upon the nature of MXene-based materials, the synthesis techniques and photocatalytic mechanism of MXenes as co-catalyst are also summarized. Finally, some final thoughts and prospects for developing highly efficient MXene-based photocatalysts are provided which will indeed motivate researchers to design novel hybrid materials based on MXenes for sustainable solutions to energy and pollution issues.
Collapse
Affiliation(s)
- Sunil Kumar Sharma
- School of Advance Chemical Sciences, Shoolini University, Solan, Himachal Pradesh, India, 173229
| | - Amit Kumar
- College of Materials Science and Engineering, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, Nanshan District Key Laboratory for Biopolymers and Safety Evaluation, Shenzhen University, Shenzhen, 518060, PR China; International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, India, 173229; School of Science and Technology, Glocal University, Saharanpur, India.
| | - Gaurav Sharma
- College of Materials Science and Engineering, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, Nanshan District Key Laboratory for Biopolymers and Safety Evaluation, Shenzhen University, Shenzhen, 518060, PR China; International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, India, 173229.
| | - Dai-Viet N Vo
- Center of Excellence for Green Energy and Environmental Nanomaterials (CE@GrEEN), Nguyen Tat Thanh University, 300A Nguyen Tat Thanh, District 4, Ho Chi Minh City, 755414, Viet Nam
| | - Alberto García-Peñas
- University Carlos III of Madrid, Av. de la Universidad, 3028911, Leganés, Madrid, Spain
| | - Omid Moradi
- Department of Chemistry, Shahr-e-Qods Branch, Islamic Azad University, Tehran, Iran
| | - Mika Sillanpää
- Environmental Engineering and Management Research Group, Ton Duc Thang University, Ho Chi Minh City, Viet Nam; Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Viet Nam.
| |
Collapse
|
11
|
Talreja N, Afreen S, Ashfaq M, Chauhan D, Mera AC, Rodríguez CA, Mangalaraja RV. Bimetal (Fe/Zn) doped BiOI photocatalyst: An effective photodegradation of tetracycline and bacteria. CHEMOSPHERE 2021; 280:130803. [PMID: 33975241 DOI: 10.1016/j.chemosphere.2021.130803] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 04/24/2021] [Accepted: 05/01/2021] [Indexed: 06/12/2023]
Abstract
Tetracycline (TC) is one of the most commonly used broad-spectrum antibiotics to treat the bacterial infection. TC antibiotics enter into the environment because of partial metabolism in the humans and animals, thereby increasing the environmental toxicity. Therefore, it is highly needed to treat TC antibiotics from the water system. In this aspect, the present work focus on the synthesis of Fe and Zn (bimetal) incorporated with different concentrations into the bismuth-oxy-iodide (Fe/Zn-BiOI) based photocatalyst materials. The synthesized Fe/Zn-BiOI was tested against photocatalytic degradation of TC antibiotics and bacteria. The band gap value of the synthesized Fe/Zn-BiOI was calculated ~2.19 eV. The incorporation of the Fe and Zn metals within the BiOI aided advantages that increased the reactive sites, oxygen defects, photon adsorption, production of hydroxyl radicals, and decrease the recombination rate, thereby high photo-degradation ability. The maximum degradation of ~83% was observed using Fe/Zn-BiOI-1-1 at 10 mg/L of TC antibiotics concentration. Moreover, ~98% of degradation was observed at pH~10 of the TC antibiotics. The photo-activity against bacteria of the Fe/Zn-BiOI was also determined. The data suggested that the synthesized Fe/Zn-BiOI based photocatalyst materials effectively inhibited the bacterial strains. Therefore, Fe/Zn-BiOI based photocatalyst materials might be promising materials that effectively degrade TC antibiotics as well as bacteria.
Collapse
Affiliation(s)
- Neetu Talreja
- Multidisciplinary Research Institute for Science and Technology, IIMCT, University of La Serena, 1015, Juan Cisternas St., La Serena, Chile; Advanced Ceramics and Nanotechnology Laboratory, Department of Materials Engineering, Faculty of Engineering, University of Concepción, Concepción, 4070409, Chile.
| | - Shagufta Afreen
- CAS Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences Qingdao PR China, Qingdao, China
| | - Mohammad Ashfaq
- Multidisciplinary Research Institute for Science and Technology, IIMCT, University of La Serena, 1015, Juan Cisternas St., La Serena, Chile; Advanced Ceramics and Nanotechnology Laboratory, Department of Materials Engineering, Faculty of Engineering, University of Concepción, Concepción, 4070409, Chile; School of Life Science, BS Abdur Rahman Crescent Institute of Science and Technology, Chennai, 600048, India
| | - Divya Chauhan
- Department of Chemical and Biomedical Engineering, University of South Florida, Tampa, FL, United States.
| | - Adriana C Mera
- Multidisciplinary Research Institute for Science and Technology, IIMCT, University of La Serena, 1015, Juan Cisternas St., La Serena, Chile; Department of Chemistry, Faculty of Sciences, University of La Serena, La Serena, Chile
| | - C A Rodríguez
- Multidisciplinary Research Institute for Science and Technology, IIMCT, University of La Serena, 1015, Juan Cisternas St., La Serena, Chile; Department of Chemistry, Faculty of Sciences, University of La Serena, La Serena, Chile
| | - R V Mangalaraja
- Advanced Ceramics and Nanotechnology Laboratory, Department of Materials Engineering, Faculty of Engineering, University of Concepción, Concepción, 4070409, Chile.
| |
Collapse
|
12
|
Mei Y, Chen J, Pan H, Hao F, Yao J. Electrochemical oxidation of triclosan using Ti/TiO 2 NTs/Al-PbO 2 electrode: reaction mechanism and toxicity evaluation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:26479-26487. [PMID: 33486682 DOI: 10.1007/s11356-021-12486-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 01/11/2021] [Indexed: 06/12/2023]
Abstract
5-Chloro-2-(2,4-dichlorophenoxy) phenol (triclosan, TCS) is a potential threat to the environment and human health, and it needs appropriate approaches for its removal. A new modified PbO2 electrode, Al-PbO2 based on TiO2 nanotubes (NTs), was successfully prepared for TCS electrochemical oxidation. Scanning electron microscopy indicated a compact coating layer on the anode. TCS removal on Ti/TiO2 NTs/Al-PbO2 anode followed a pseudo-first-order kinetics. The electrical efficiency per log order (EE/O) for oxidation was decreased from 14.79 to 12.90 kWh m-3 order-1 after TiO2 NTs on Ti material and decreased to 8.27 kWh m-3 order-1 after Al3+ doping. The effects of current density, pH value, and electrolyte concentration were investigated. Intermediate organo-chlorinated compounds were detected by gas chromatography coupled with mass spectrometry, high-performance liquid chromatography, and ion chromatography. Finally, ecotoxicity assessment revealed that the degradation of TCS by electrooxidation system with Ti/TiO2 NTs/Al-PbO2 anode could yield a smaller toxicity compared with parent compounds.
Collapse
Affiliation(s)
- Yu Mei
- College of Biological and Environmental Engineering, Zhejiang Shuren University, Hangzhou, 310005, China
| | - Jun Chen
- College of Biological and Environmental Engineering, Zhejiang Shuren University, Hangzhou, 310005, China
| | - Hua Pan
- College of Biological and Environmental Engineering, Zhejiang Shuren University, Hangzhou, 310005, China
| | - Feilin Hao
- College of Biological and Environmental Engineering, Zhejiang Shuren University, Hangzhou, 310005, China
| | - Jiachao Yao
- College of Biological and Environmental Engineering, Zhejiang Shuren University, Hangzhou, 310005, China.
| |
Collapse
|
13
|
Yao Y, Sang D, Duan S, Wang Q, Liu C. Excellent optoelectronic applications and electrical transport behavior of the n-WO 3nanostructures/p-diamond heterojunction: a new perspective. NANOTECHNOLOGY 2021; 32:332501. [PMID: 33951616 DOI: 10.1088/1361-6528/abfe24] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 05/05/2021] [Indexed: 06/12/2023]
Abstract
Nanostructured n-type metal oxides/p-type boron-doped diamond heterojunctions have demonstrated a typical rectification feature and/or negative differential resistance (NDR) potentially applied in wide fields. Recently, the fabrication and electronic transport behavior of n-WO3nanorods/p-diamond heterojunction at high temperatures were studied by Wanget al(2017Appl. Phys. Lett.110052106), which opened the door for optoelectronic applications that can operate at high-temperatures, high-power, and in various harsh environments. In this perspective, an overview was presented on the future directions, challenges and opportunities for the optoelectronic applications based on the n-WO3nanostructures/p-diamond heterojunction. We focus, in particular, on the prospects for its high temperature NDR, UV photodetector, field emission emitters, photocatalyst and optical information storage for a wide range of new optoelectronic applications.
Collapse
Affiliation(s)
- Yu Yao
- School of Physics Science and Information Technology, Shandong Key Laboratory of Optical Communication Science and Technology, Liaocheng University, Shandong 252000, People's Republic of China
| | - Dandan Sang
- School of Physics Science and Information Technology, Shandong Key Laboratory of Optical Communication Science and Technology, Liaocheng University, Shandong 252000, People's Republic of China
| | - Susu Duan
- School of Physics Science and Information Technology, Shandong Key Laboratory of Optical Communication Science and Technology, Liaocheng University, Shandong 252000, People's Republic of China
| | - Qinglin Wang
- School of Physics Science and Information Technology, Shandong Key Laboratory of Optical Communication Science and Technology, Liaocheng University, Shandong 252000, People's Republic of China
| | - Cailong Liu
- School of Physics Science and Information Technology, Shandong Key Laboratory of Optical Communication Science and Technology, Liaocheng University, Shandong 252000, People's Republic of China
| |
Collapse
|
14
|
Bera S, Kumari A, Ghosh S, Basu RN. Assemble of Bi-doped TiO 2 onto 2D MoS 2: an efficient p-n heterojunction for photocatalytic H 2 generation under visible light. NANOTECHNOLOGY 2021; 32:195402. [PMID: 33513599 DOI: 10.1088/1361-6528/abe152] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Fabrication of noble-metal-free, efficient and stable hybrid photocatalyst is essential to address the rapidly growing energy crisis and environmental pollution. Here, MoS2 has been used as the co-catalyst on Bi-doped TiO2 to form a novel heterostructure to increase the utilization of the photogenerated charge carriers for improving photocatalytic H2 evolution activity through water reduction. Significantly increased photocatalytic H2 generation has been achieved on the optimized MoS2/Bi-TiO2 nanocomposite (∼512 μmol g-1) after 4 h of visible light illumination, which is nine times higher than that of the pristine TiO2 (∼57 μmol g-1). The measurements of photocurrent, charge transfer resistance and photo-stability of MoS2/Bi-TiO2 photoanode imply that charge separation efficiency has been improved in comparison to the pure MoS2 and TiO2 photoanodes. Further, the Mott-Schottky study confirmed that a p-n heterojunction has been formed between n-type MoS2 and p-type Bi-doped TiO2, which provides a potential gradient to increase charge separation and transfer efficiency. On the basis of these experimental results, this enhanced photocatalytic activity of MoS2/Bi-TiO2 heterostructures could be ascribed to the significant visible light absorption and the efficient charge carrier separation. Thus, this work demonstrates the effect of p-n junction for achieving high H2 evolution activity and photoelectrochemical water oxidation under visible light illumination.
Collapse
Affiliation(s)
- Susmita Bera
- Energy Materials & Devices Division, (Formerly Fuel Cell & Battery Division) CSIR-Central Glass and Ceramic Research Institute, 196, Raja S. C. Mullick Road, Kolkata-700032, India
| | - Ankita Kumari
- Energy Materials & Devices Division, (Formerly Fuel Cell & Battery Division) CSIR-Central Glass and Ceramic Research Institute, 196, Raja S. C. Mullick Road, Kolkata-700032, India
| | - Srabanti Ghosh
- Energy Materials & Devices Division, (Formerly Fuel Cell & Battery Division) CSIR-Central Glass and Ceramic Research Institute, 196, Raja S. C. Mullick Road, Kolkata-700032, India
| | - Rajendra N Basu
- Energy Materials & Devices Division, (Formerly Fuel Cell & Battery Division) CSIR-Central Glass and Ceramic Research Institute, 196, Raja S. C. Mullick Road, Kolkata-700032, India
| |
Collapse
|
15
|
Delavar M, Bakeri G, Hosseini M, Nabian N. Synthesis and Application of Titania Nanotubes and Hydrous Manganese Oxide in Heavy Metal Removal from Aqueous Solution: Characterization, Comparative Study, and Adsorption Kinetics. THEORETICAL FOUNDATIONS OF CHEMICAL ENGINEERING 2021. [DOI: 10.1134/s004057952101005x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|
16
|
Koiki BA, Orimolade BO, Zwane BN, Nkosi D, Mabuba N, Arotiba OA. Cu2O on anodised TiO2 nanotube arrays: A heterojunction photoanode for visible light assisted electrochemical degradation of pharmaceuticals in water. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.135944] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
17
|
Mercenaria Shell Powder as a Cost-Effective and Eco-friendly Photocatalyst for the Degradation of Eriochrome Black T Dye. IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY, TRANSACTIONS A: SCIENCE 2020. [DOI: 10.1007/s40995-019-00802-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
18
|
Jadhav S, Navarro-Mendoza R, Lozano-Sotomayor P, Galindo-Esquivel IR, Serrano O, Peralta-Hernández JM. Enhanced Photocatalytic Activity of TiO 2 Modified with GaI toward Environmental Application. Inorg Chem 2020; 59:1315-1322. [PMID: 31880434 DOI: 10.1021/acs.inorgchem.9b03020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Gallium (Ga) ion-doped TiO2 (Ga-TiO2) nanocomposite with small particle size (9-10 nm) and high surface area (104 m2/g) has been easily synthesized via sol-gel method at low temperature by using low-valent GaI as a doping precursor. The structural and morphological characterization of Ga-TiO2 was carried out with standard analytical and spectroscopic techniques. Ga doping into the TiO2 matrix inhibited a phase transformation from anatase to rutile (photocatalytically inactive) form, even at a higher temperature of 750 °C. Finally, Ga-TiO2 nanocomposite showed high photocatalytic activity and exhibited 97% degradation of acid violet 63 dye within 60 min. The dye degradation rate constant was calculated as 1.6 × 10-1 and 1.4 × 10-1 min-1 under UV and white light irradiation, respectively, which is higher, as compared to the previously reported Ga-TiO2 composites to date.
Collapse
Affiliation(s)
- Shraddha Jadhav
- Departamento de Química, Sede Pueblito de Rocha, División de Ciencias Naturales y Exactas, Campus Guanajuato , Universidad de Guanajuato , Guanajuato , Mexico 36040
| | - Ricardo Navarro-Mendoza
- Departamento de Química, Sede Pueblito de Rocha, División de Ciencias Naturales y Exactas, Campus Guanajuato , Universidad de Guanajuato , Guanajuato , Mexico 36040
| | - Paulina Lozano-Sotomayor
- Departamento de Química, Sede Pueblito de Rocha, División de Ciencias Naturales y Exactas, Campus Guanajuato , Universidad de Guanajuato , Guanajuato , Mexico 36040
| | - Ignacio R Galindo-Esquivel
- Departamento de Ingeniería Química, Sede Noria Alta, División de Ciencias Naturales y Exactas, Campus Guanajuato , Universidad de Guanajuato , Guanajuato , Mexico 36020
| | - Oracio Serrano
- Departamento de Química, Sede Pueblito de Rocha, División de Ciencias Naturales y Exactas, Campus Guanajuato , Universidad de Guanajuato , Guanajuato , Mexico 36040
| | - Juan M Peralta-Hernández
- Departamento de Química, Sede Pueblito de Rocha, División de Ciencias Naturales y Exactas, Campus Guanajuato , Universidad de Guanajuato , Guanajuato , Mexico 36040
| |
Collapse
|
19
|
Rabin NN, Ohmagari H, Islam MS, Karim MR, Hayami S. A procession on photocatalyst for solar fuel production and waste treatment. J INCL PHENOM MACRO 2019. [DOI: 10.1007/s10847-019-00889-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
|
20
|
Lee K, Yoon H, Ahn C, Park J, Jeon S. Strategies to improve the photocatalytic activity of TiO 2: 3D nanostructuring and heterostructuring with graphitic carbon nanomaterials. NANOSCALE 2019; 11:7025-7040. [PMID: 30920558 DOI: 10.1039/c9nr01260e] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
TiO2-based photocatalysis has been considered to be one of the most promising avenues for environmental remediation including water purification. However, several technical issues such as the limited surface area of bulk TiO2, the large band gap of TiO2, and rapid charge recombination still limit the practical application of TiO2 photocatalysts. Therefore, here we focus on two structural design strategies: (i) monolithic three-dimensional (3D) nanostructuring, and (ii) heterostructuring with graphitic carbon nanomaterials. A monolithic 3D nanostructure enables maximal surface area in a given volume and efficient reuse of the photocatalyst without recollection. Heterostructuring with carbon nanomaterials helps achieve maximal utilization of the solar spectrum and charge separation and provides efficient TiO2 photocatalysts. In this review, recent progress on TiO2 photocatalysts toward the abovementioned strategies will be summarized. Further discussion and direction will provide insights into the rational design of highly efficient TiO2 photocatalysts, and help develop advanced photocatalyst models.
Collapse
Affiliation(s)
- Kisung Lee
- Department of Materials Science and Engineering, KAIST Institute for the Nanocentury, Advanced Battery Center, KAIST, Daejeon 34141, Republic of Korea.
| | | | | | | | | |
Collapse
|
21
|
Zaib Q, Jouiad M, Ahmad F. Ultrasonic Synthesis of Carbon Nanotube-Titanium Dioxide Composites: Process Optimization via Response Surface Methodology. ACS OMEGA 2019; 4:535-545. [PMID: 31459348 PMCID: PMC6648941 DOI: 10.1021/acsomega.8b02706] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 12/20/2018] [Indexed: 05/23/2023]
Abstract
In this study, the central composite design of response surface methodology was applied to optimize the ultrasonic synthesis of multiwalled carbon nanotube-titanium dioxide (MWNT-TiO2) composites. Twenty composites were prepared by adjusting three parameters (MWNT concentration in water, sonication to disperse/exfoliate MWNTs in water, and sonication to attach TiO2 onto MWNTs) at five levels. On the basis of the experimental design, semiempirical expressions were developed, analyzed, statistically assessed, and subsequently applied to predict the impact of the studied parameters on composite synthesis. The composite synthesis process was optimized to capture the experimental conditions favoring the highest productivity (i.e., MWNT-TiO2 formation or percent TiO2 attachment) utilizing minimal resources. The synthesis process optimization results showed that, to make a MWNT-TiO2 composite in 10 mL of water, 23.2 mg (∼99% of 23.4 mg) of TiO2 can be attached to 2.6 mg of MWNTs. This process requires only 727 J sonication energy, of which 592 J is invested to exfoliate MWNTs (Sonication 1) and 135 J to attach TiO2 (Sonication 2) to MWNTs. Finally, the optimally synthesized composite was extensively characterized using SEM, surface area and porosity analysis, TGA, and ζ-potential analysis/DLS. Also, this composite was tested for stability under variable pH and solvent polarity. The approach developed in this study could be used to optimize the synthesis process of other similar composites.
Collapse
Affiliation(s)
- Qammer Zaib
- Department
of Civil, Infrastructure and Environmental Engineering and Materials Science
& Engineering, Khalifa University of
Science and Technology, Masdar City
Campus, P.O. Box 54224, Abu Dhabi, UAE
- Department
of Civil and Environmental Engineering, University of Ulsan, 93 Daehakro, Ulsan 680-749, South Korea
| | - Mustapha Jouiad
- Department
of Civil, Infrastructure and Environmental Engineering and Materials Science
& Engineering, Khalifa University of
Science and Technology, Masdar City
Campus, P.O. Box 54224, Abu Dhabi, UAE
| | - Farrukh Ahmad
- Department
of Civil, Infrastructure and Environmental Engineering and Materials Science
& Engineering, Khalifa University of
Science and Technology, Masdar City
Campus, P.O. Box 54224, Abu Dhabi, UAE
| |
Collapse
|
22
|
Munawar K, Perveen F, Shahid MM, Basirun WJ, Bin Misran M, Mazhar M. Synthesis, characterization and computational study of an ilmenite-structured Ni 3Mn 3Ti 6O 18 thin film photoanode for solar water splitting. NEW J CHEM 2019. [DOI: 10.1039/c9nj00457b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Thin films of a Ni3Mn3Ti6O18 solid solution photoanode have been deposited on an FTO coated glass substrate and experimental results are supported by DFT studies.
Collapse
Affiliation(s)
- Khadija Munawar
- Department of Chemistry
- Faculty of Science
- University of Malaya
- Kuala Lumpur 50603
- Malaysia
| | - Fouzia Perveen
- Research Center for Modeling and Simulation (RCMS)
- National University of Sciences and Technology (NUST)
- Islamabad
- Pakistan
| | - Muhammad Mehmood Shahid
- Higher Institution Centre of Excellence (HICoE)
- UM Power Energy Dedicated Advanced Centre (UMPEDAC)
- Level 4
- Wisma R&D University of Malaya
- 59990 Kuala Lumpur
| | - Wan Jeffrey Basirun
- Department of Chemistry
- Faculty of Science
- University of Malaya
- Kuala Lumpur 50603
- Malaysia
| | - Misni Bin Misran
- Department of Chemistry
- Faculty of Science
- University of Malaya
- Kuala Lumpur 50603
- Malaysia
| | - Muhammad Mazhar
- Department of Chemistry
- Faculty of Science
- University of Malaya
- Kuala Lumpur 50603
- Malaysia
| |
Collapse
|
23
|
Mabuti LA, Manding IKS, Mercado CC. Photovoltaic and photocatalytic properties of bismuth oxyiodide-graphene nanocomposites. RSC Adv 2018; 8:42254-42261. [PMID: 35558407 PMCID: PMC9092079 DOI: 10.1039/c8ra07360k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 11/23/2018] [Indexed: 11/26/2022] Open
Abstract
In this study, we evaluate the photovoltaic and photocatalytic properties of chemical vapor deposited bismuth oxyiodide (BiOI) and bismuth oxyiodide-graphene (BiOI-GR) nanocomposite thin films. The BiOI thin film has an average thickness of 574 nm and a bandgap of around 2 eV. The BiOI and BiOI-GR thin films exhibited nanoflake morphology. It was found that addition of graphene increases absorbance by causing vertical growth of nanoflakes, imparting anti-reflectance and light trapping properties. The photocatalytic activities of the thin films were evaluated by examining methylene blue (MB) degradation under visible light irradiation. BiOI-GR degraded 56.42% of MB in two hours while BiOI degraded 44.16%. Afterwards, FTO|BiOI|graphite|Al and FTO|BiOI-GR|graphite|Al solar cell devices were fabricated with photocurrent density values of 2.0 μA cm-2 and 2.7 μA cm-2, respectively. The improved properties of BiOI-GR are attributed to the anti-reflecting and light trapping properties of vertical BiOI-GR nanoflakes and the enhanced carrier separation due to graphene as an electron acceptor.
Collapse
Affiliation(s)
- Levannie A Mabuti
- Department of Mining, Metallurgical, and Materials Engineering, University of the Philippines Diliman 1100 Quezon City Philippines
| | - Ian Kenneth S Manding
- Department of Mining, Metallurgical, and Materials Engineering, University of the Philippines Diliman 1100 Quezon City Philippines
| | - Candy C Mercado
- Department of Mining, Metallurgical, and Materials Engineering, University of the Philippines Diliman 1100 Quezon City Philippines
| |
Collapse
|
24
|
Li R, Zhao Y, Li C. Spatial distribution of active sites on a ferroelectric PbTiO 3 photocatalyst for photocatalytic hydrogen production. Faraday Discuss 2018; 198:463-472. [PMID: 28267163 DOI: 10.1039/c6fd00199h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The separation of photogenerated charge carries is a challenging issue in artificial photocatalyst systems for solar energy conversion. It has been reported that spatial charge separation can take place between different facets of semiconductor-based crystals with regular morphology and facets, which could be used to rationally deposit cocatalysts on the right facets. However, the spatial separation of photogenerated electrons and holes is still a big challenge for a particulate photocatalyst without regular morphology and specific facets. In this work, we demonstrated that photogenerated electrons and holes can be regularly separated on ferroelectric PbTiO3 photocatalyst even without regular morphology and facets. The reduction cocatalyst and oxidation cocatalyst could be selectively formed on different sites via an in situ photochemical deposition method. It is found that the photoactivity and hydrogen production for PbTiO3 with spatially separated dual-cocatalysts is remarkably enhanced to more than 100 times greater compared to native PbTiO3, which is much higher than that the case of dual-cocatalysts with a random distribution. The intrinsic electric fields and spontaneous electric polarization in the bulk of PbTiO3 are proposed to play important roles in the spatial distribution of active sites on irregular PbTiO3 particles. Our work emphasizes the essential roles of two important factors, efficient charge separation strategy and the location of dual-cocatalysts on the right sites, to construct integrated artificial photocatalyst systems for solar energy conversion.
Collapse
Affiliation(s)
- Rengui Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, The Collaborative Innovation Center of Chemistry for Energy Materials, Dalian 116023, Liaoning, China.
| | | | | |
Collapse
|
25
|
Zhou X, Liu S, Yu H, Xu A, Li J, Sun X, Shen J, Han W, Wang L. Electrochemical oxidation of pyrrole, pyrazole and tetrazole using a TiO2 nanotubes based SnO2-Sb/3D highly ordered macro-porous PbO2 electrode. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.08.039] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
|
26
|
Huang S, Jin Z, Yi H, Yang Z, Long Y, Liao Q, Chen J, Cao Y, Ruan S, Zeng YJ. Stannous oxide promoted charge separation in rationally designed heterojunction photocatalysts with a controllable mechanism. Dalton Trans 2018; 47:12734-12741. [PMID: 30141818 DOI: 10.1039/c8dt02708k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Due to the sluggish mobility of holes, the low charge-separation rate remains an intrinsic issue that limits further increase of the photocatalytic conversion efficiency. Herein, we proposed an in situ hydrothermal method to expedite the charge transfer with enhanced photocatalytic H2 evolution rate and photodegradation activities via introducing SnO microplates into TiO2. As compared to bare TiO2, the SnO/TiO2 heterojunction achieves remarkable 470% and 150% higher efficiency for the photocatalytic H2 evolution rate and photodegradation of rhodamine B, respectively. In particular, it is demonstrated that the charge transfer mechanism of SnO/TiO2 can be switched from the Z-scheme to type II by Pt loading, leading to a significant enhancement of photocatalytic performances. Furthermore, the photocatalytic H2 evolution activities of ZnO and C3N4 can also be improved by introducing SnO via simple mechanical mixing. This work provides not only a new versatile stimulant for enhancing photocatalytic activities but also in-depth understanding of the charge transfer mechanism of heterointerfaces of semiconductors.
Collapse
Affiliation(s)
- Shaolong Huang
- Shenzhen Key Laboratory of Laser Engineering, Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, People's Republic of China.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Enhanced photocatalytic activity of Se-doped TiO 2 under visible light irradiation. Sci Rep 2018; 8:8752. [PMID: 29884870 PMCID: PMC5993730 DOI: 10.1038/s41598-018-27135-4] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 05/25/2018] [Indexed: 12/20/2022] Open
Abstract
Anatase TiO2 is a typical photocatalyst, and its excellent performance is limited in ultraviolet light range due to its wide band gap of 3.2 eV. A series of Se-doped TiO2 nanoparticles in anatase structure with various Se concentrations up to 17.1 at.% were prepared using sol-gel method. The doped Se ions are confirmed to be mainly in the valence state of + 4, which provides extra electronic states in the band gap of TiO2. The band gap is effectively narrowed with the smallest gap energy of 2.17 eV, and the photocatalytic activity is effectively improved due to the extended absorption range. The photocatalytic activity was evaluated by the degradation of Rhodamine B (RhB) in aqueous solution under visible light irradiation. The results show that Se doping significantly improves the photocatalytic activity of TiO2 and 13.63 at.% Se-doped TiO2 has the best performance.
Collapse
|
28
|
Sun M, Chen Z, Li J, Hou J, Xu F, Xu L, Zeng R. Enhanced visible light-driven activity of TiO2 nanotube array photoanode co-sensitized by “green” AgInS2 photosensitizer and In2S3 buffer layer. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.03.035] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
29
|
Wang D, Astruc D. The recent development of efficient Earth-abundant transition-metal nanocatalysts. Chem Soc Rev 2018; 46:816-854. [PMID: 28101543 DOI: 10.1039/c6cs00629a] [Citation(s) in RCA: 275] [Impact Index Per Article: 45.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Whereas noble metal compounds have long been central in catalysis, Earth-abundant metal-based catalysts have in the same time remained undeveloped. Yet the efficacy of Earth-abundant metal catalysts was already shown at the very beginning of the 20th century with the Fe-catalyzed Haber-Bosch process of ammonia synthesis and later in the Fischer-Tropsch reaction. Nanoscience has revolutionized the world of catalysis since it was observed that very small Au nanoparticles (NPs) and other noble metal NPs are extraordinarily efficient. Therefore the development of Earth-abundant metals NPs is more recent, but it has appeared necessary due to their "greenness". This review highlights catalysis by NPs of Earth-abundant transition metals that include Mn, Fe, Co, Ni, Cu, early transition metals (Ti, V, Cr, Zr, Nb and W) and their nanocomposites with emphasis on basic principles and literature reported during the last 5 years. A very large spectrum of catalytic reactions has been successfully disclosed, and catalysis has been examined for each metal starting with zero-valent metal NPs followed by oxides and other nanocomposites. The last section highlights the catalytic activities of bi- and trimetallic NPs. Indeed this later family is very promising and simultaneously benefits from increased stability, efficiency and selectivity, compared to monometallic NPs, due to synergistic substrate activation.
Collapse
Affiliation(s)
- Dong Wang
- ISM, UMR CNRS 5255, Univ. Bordeaux, 33405 Talence Cedex, France.
| | - Didier Astruc
- ISM, UMR CNRS 5255, Univ. Bordeaux, 33405 Talence Cedex, France.
| |
Collapse
|
30
|
Shao YY, Ye WD, Sun CY, Liu CL, Wang Q, Chen CC, Gu JY, Chen XQ. Enhanced photoreduction degradation of polybromodiphenyl ethers with Fe3O4-g-C3N4 under visible light irradiation. RSC Adv 2018; 8:10914-10921. [PMID: 35541522 PMCID: PMC9078955 DOI: 10.1039/c8ra01356j] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 03/09/2018] [Indexed: 12/31/2022] Open
Abstract
As typical persistent organic pollutants, polybrominated diphenyl ethers (PBDEs) have aroused high environmental concern due to their toxicity and recalcitrant degradation. Herein, we report the enhanced photoreduction degradation of polybromodiphenyl ethers with Fe3O4-g-C3N4 under visible light irradiation (>420 nm). A series of high activity photocatalysts Fe3O4-g-C3N4 (named FeOCN-x) have been synthesized by an in situ growth method. The characterization of the prepared FeOCN-x nanocomposites has been examined by SEM, TEM, ultraviolet-visible diffuse reflectance spectroscopy, a vibrating sample magnetometer, X-ray diffraction, X-ray photoelectron spectroscopy and Brunauer–Emmer–Teller surface area analysis. FeOCN-x hybrids all exhibit good magnetic separation properties with the saturation magnetization at 300 K varying from 0.4 to 6.3 emu g−1. Under visible light irradiation, FeOCN-x hybrids show enhanced photocatalytic activity for the debromination of PBDEs compared with g-C3N4. Among all the hybrids, FeOCN-4 with a 4 wt% Fe3O4 content gives the highest reaction rate, which is 6.7 times as high as that in pure g-C3N4. The FeOCN-x nanocomposites not only exhibit good photostability, but could also be easily recovered by magnetism. The results of the kinetic isotope effects (KIE) and the trapping agent experiments show that the rate determining step in the degradation reaction of PBDEs with FeOCN-x is the rate of electron accumulation in the conductive band. A possible photoreductive mechanism has been proposed. This study shows that the easily magnetically separable recycled photocatalyst FeOCN-x, with high visible light activity, could be an excellent candidate for dealing with halogen pollutants. The enhanced photoreduction degradation of polybrominated diphenyl ethers with magnetic separable Fe3O4-g-C3N4 under visible light irradiation is reported.![]()
Collapse
Affiliation(s)
- Ying-Ying Shao
- Department of Chemistry
- Shaoxing University
- Shaoxing 312000
- PR China
| | - Wei-Dong Ye
- Department of Chemistry
- Shaoxing University
- Shaoxing 312000
- PR China
| | - Chun-Yan Sun
- Department of Chemistry
- Shaoxing University
- Shaoxing 312000
- PR China
| | - Chun-Lin Liu
- Department of Chemistry
- Shaoxing University
- Shaoxing 312000
- PR China
| | - Qi Wang
- School of Environment Sciences and Engineering
- Zhejiang Gongshang University
- Hangzhou
- PR China
| | - Chun-cheng Chen
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Photochemistry
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Jia-Yun Gu
- Department of Chemistry
- Shaoxing University
- Shaoxing 312000
- PR China
| | - Xiao-Qing Chen
- Department of Chemistry
- Shaoxing University
- Shaoxing 312000
- PR China
| |
Collapse
|
31
|
Ali MEM, Alhathal Alanezi A, Azeez FA, Ghaly MY. Photoassisted mineralization of remazole red F3B over NiO/TiO2 and CdO/TiO2 nanoparticles under simulated sunlight. SEP SCI TECHNOL 2017. [DOI: 10.1080/01496395.2017.1379536] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Mohamed E. M. Ali
- Water Pollution Research Department, Environmental Sciences Division, National Research Centre (NRC), Cairo, Egypt
| | - Adnan Alhathal Alanezi
- Department of Chemical Engineering Technology, College of Technological Studies, The Public Authority for Applied Education and Training (PAAET), Sabah Al-Salem, Kuwait
| | - Fadhel Abbas Azeez
- Chemical Engineering Department, College of Engineering and Petroleum, Safat, Kuwait
| | - Montaser Y. Ghaly
- Chemical Engineering and Pilot Plant Department, Engineering Research Division, National Research Centre (NRC), Cairo, Egypt
| |
Collapse
|
32
|
Zhang Q, Wang H, Li Z, Geng C, Leng J. Metal-Free Photocatalyst with Visible-Light-Driven Post-Illumination Catalytic Memory. ACS APPLIED MATERIALS & INTERFACES 2017; 9:21738-21746. [PMID: 28613811 DOI: 10.1021/acsami.7b02473] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A novel metal-free photocatalyst with post-illumination catalytic memory was fabricated by the graphitic carbon nitride (g-C3N4), carbon nanotubes (CNTs), and graphene (Gr), in which g-C3N4 acts as an efficient photocatalyst and the CNTs and Gr act as supercapacitors. The removal of phenol was achieved in the dark by post-illumination catalytic memory because the photocatalyst could store a portion of its photoactivity via photogenerated electrons in the CNTs and Gr under visible-light illumination and then release the electrons again in the dark. Therefore, this metal-free photocatalyst is capable of operation in the dark for a broad range of applications.
Collapse
Affiliation(s)
- Qi Zhang
- School of Fisheries and Life Science, Dalian Ocean University , Dalian 116023, China
| | - Hua Wang
- School of Fisheries and Life Science, Dalian Ocean University , Dalian 116023, China
- Fujian Provincial Key Laboratory of Ecology-Toxicological Effects and Control for Emerging Contaminants , Putian 351100, China
- Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture , Dalian 116023, China
| | - Zhangliang Li
- Fujian Provincial Key Laboratory of Ecology-Toxicological Effects and Control for Emerging Contaminants , Putian 351100, China
| | - Cong Geng
- School of Fisheries and Life Science, Dalian Ocean University , Dalian 116023, China
| | - Jinhui Leng
- School of Fisheries and Life Science, Dalian Ocean University , Dalian 116023, China
| |
Collapse
|
33
|
Low J, Yu J, Jaroniec M, Wageh S, Al-Ghamdi AA. Heterojunction Photocatalysts. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1601694. [PMID: 28220969 DOI: 10.1002/adma.201601694] [Citation(s) in RCA: 1314] [Impact Index Per Article: 187.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Revised: 11/04/2016] [Indexed: 05/20/2023]
Abstract
Semiconductor-based photocatalysis attracts wide attention because of its ability to directly utilize solar energy for production of solar fuels, such as hydrogen and hydrocarbon fuels and for degradation of various pollutants. However, the efficiency of photocatalytic reactions remains low due to the fast electron-hole recombination and low light utilization. Therefore, enormous efforts have been undertaken to solve these problems. Particularly, properly engineered heterojunction photocatalysts are shown to be able to possess higher photocatalytic activity because of spatial separation of photogenerated electron-hole pairs. Here, the basic principles of various heterojunction photocatalysts are systematically discussed. Recent efforts toward the development of heterojunction photocatalysts for various photocatalytic applications are also presented and appraised. Finally, a brief summary and perspectives on the challenges and future directions in the area of heterojunction photocatalysts are also provided.
Collapse
Affiliation(s)
- Jingxiang Low
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan, 430070, P. R. China
| | - Jiaguo Yu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan, 430070, P. R. China
- Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Mietek Jaroniec
- Department of Chemistry and Biochemistry, Kent State University, Kent, Ohio, 44242, USA
| | - Swelm Wageh
- Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Ahmed A Al-Ghamdi
- Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| |
Collapse
|
34
|
Ye W, Shao Y, Hu X, Liu C, Sun C. Highly Enhanced Photoreductive Degradation of Polybromodiphenyl Ethers with g-C3N4/TiO2 under Visible Light Irradiation. NANOMATERIALS 2017; 7:nano7040076. [PMID: 28368348 PMCID: PMC5408168 DOI: 10.3390/nano7040076] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 03/29/2017] [Accepted: 03/30/2017] [Indexed: 11/16/2022]
Abstract
A series of high activity photocatalysts g-C3N4-TiO2 were synthesized by simple one-pot thermal transformation method and characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy, Brunauer–Emmett–Teller (BET) surface area, and ultraviolet–visible diffuse reflectance spectroscopy (UV-Vis-DRS). The g-C3N4-TiO2 samples show highly improved photoreductive capability for the degradation of polybromodiphenyl ethers compared with g-C3N4 under visible light irradiation. Among all the hybrids, 0.02-C3N4-TiO2 with 2 wt % g-C3N4 loaded shows the highest reaction rate, which is 15 times as high as that in bare g-C3N4. The well-matched band gaps in heterojunction g-C3N4-TiO2 not only strengthen the absorption intensity, but also show more effective charge carrier separation, which results in the highly enhanced photoreductive performance under visible light irradiation. The trapping experiments show that holetrapping agents largely affect the reaction rate. The rate of electron accumulation in the conductive band is the rate-determining step in the degradation reaction. A possible photoreductive mechanism has been proposed.
Collapse
Affiliation(s)
- Weidong Ye
- Department of Chemistry, Shaoxing University, Shaoxing 312000, Zhejiang, China.
| | - Yingying Shao
- Department of Chemistry, Shaoxing University, Shaoxing 312000, Zhejiang, China.
| | - Xuefeng Hu
- Key laboratory of Coastal Zone Envirenmental Process and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, Shandong, China.
| | - Chulin Liu
- Department of Chemistry, Shaoxing University, Shaoxing 312000, Zhejiang, China.
| | - Chunyan Sun
- Department of Chemistry, Shaoxing University, Shaoxing 312000, Zhejiang, China.
| |
Collapse
|
35
|
Abstract
This review presents the recent remarkable developments of efficient Earth-abundant transition-metal nanocatalysts.
Collapse
Affiliation(s)
- Dong Wang
- ISM
- UMR CNRS 5255
- Univ. Bordeaux
- 33405 Talence Cedex
- France
| | - Didier Astruc
- ISM
- UMR CNRS 5255
- Univ. Bordeaux
- 33405 Talence Cedex
- France
| |
Collapse
|
36
|
Harish S, Archana J, Navaneethan M, Ponnusamy S, Singh A, Gupta V, Aswal DK, Ikeda H, Hayakawa Y. Synergetic effect of CuS@ZnS nanostructures on photocatalytic degradation of organic pollutant under visible light irradiation. RSC Adv 2017. [DOI: 10.1039/c7ra04250g] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Ultrafast visible light active CuS/ZnS nanostructured photocatalysts were synthesized by a hydrothermal method.
Collapse
Affiliation(s)
- S. Harish
- Research Institute of Electronics
- Shizuoka University
- Shizuoka 432-8011
- Japan
| | - J. Archana
- Center for Materials Science and Nano Devices
- Department of Physics and Nanotechnology
- SRM University
- Chennai
- India
| | - M. Navaneethan
- Research Institute of Electronics
- Shizuoka University
- Shizuoka 432-8011
- Japan
- Center for Materials Science and Nano Devices
| | - S. Ponnusamy
- Center for Materials Science and Nano Devices
- Department of Physics and Nanotechnology
- SRM University
- Chennai
- India
| | - Ajay Singh
- Technical Physics Division
- Bhabha Atomic Research Center
- Mumbai 400 085
- India
| | - Vinay Gupta
- Organic and Hybrid Solar Cell Group
- CSIR-National Physical Laboratory
- New Delhi
- India
| | - D. K. Aswal
- Organic and Hybrid Solar Cell Group
- CSIR-National Physical Laboratory
- New Delhi
- India
| | - H. Ikeda
- Research Institute of Electronics
- Shizuoka University
- Shizuoka 432-8011
- Japan
| | - Y. Hayakawa
- Research Institute of Electronics
- Shizuoka University
- Shizuoka 432-8011
- Japan
| |
Collapse
|
37
|
Yousefzadeh S, Faraji M, Moshfegh AZ. Constructing BiVO4/Graphene/TiO2 nanocomposite photoanode for photoelectrochemical conversion applications. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2015.12.024] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
38
|
Terashima C, Hishinuma R, Roy N, Sugiyama Y, Latthe SS, Nakata K, Kondo T, Yuasa M, Fujishima A. Charge Separation in TiO2/BDD Heterojunction Thin Film for Enhanced Photoelectrochemical Performance. ACS APPLIED MATERIALS & INTERFACES 2016; 8:1583-1588. [PMID: 26756353 DOI: 10.1021/acsami.5b10993] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Semiconductor photocatalysis driven by electron/hole has begun a new era in the field of solar energy conversion and storage. Here we report the fabrication and optimization of TiO2/BDD p-n heterojunction photoelectrode using p-type boron doped diamond (BDD) and n-type TiO2 which shows enhanced photoelectrochemical activity. A p-type BDD was first deposited on Si substrate by microwave plasma chemical vapor deposition (MPCVD) method and then n-type TiO2 was sputter coated on top of BDD grains for different durations. The microstructural studies reveal a uniform disposition of anatase TiO2 and its thickness can be tuned by varying the sputtering time. The formation of p-n heterojunction was confirmed through I-V measurement. A remarkable rectification property of 63773 at 5 V with very small leakage current indicates achieving a superior, uniform and precise p-n junction at TiO2 sputtering time of 90 min. This suitably formed p-n heterojunction electrode is found to show 1.6 fold higher photoelectrochemical activity than bare n-type TiO2 electrode at an applied potential of +1.5 V vs SHE. The enhanced photoelectrochemical performance of this TiO2/BDD electrode is ascribed to the injection of hole from p-type BDD to n-type TiO2, which increases carrier separation and thereby enhances the photoelectrochemical performance.
Collapse
Affiliation(s)
- Chiaki Terashima
- Photocatalysis International Research Center, Research Institute for Science & Technology, and ‡Faculty of Science and Technology, Tokyo University of Science , 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Ryota Hishinuma
- Photocatalysis International Research Center, Research Institute for Science & Technology, and ‡Faculty of Science and Technology, Tokyo University of Science , 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Nitish Roy
- Photocatalysis International Research Center, Research Institute for Science & Technology, and ‡Faculty of Science and Technology, Tokyo University of Science , 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Yuki Sugiyama
- Photocatalysis International Research Center, Research Institute for Science & Technology, and ‡Faculty of Science and Technology, Tokyo University of Science , 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Sanjay S Latthe
- Photocatalysis International Research Center, Research Institute for Science & Technology, and ‡Faculty of Science and Technology, Tokyo University of Science , 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Kazuya Nakata
- Photocatalysis International Research Center, Research Institute for Science & Technology, and ‡Faculty of Science and Technology, Tokyo University of Science , 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Takeshi Kondo
- Photocatalysis International Research Center, Research Institute for Science & Technology, and ‡Faculty of Science and Technology, Tokyo University of Science , 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Makoto Yuasa
- Photocatalysis International Research Center, Research Institute for Science & Technology, and ‡Faculty of Science and Technology, Tokyo University of Science , 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Akira Fujishima
- Photocatalysis International Research Center, Research Institute for Science & Technology, and ‡Faculty of Science and Technology, Tokyo University of Science , 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| |
Collapse
|
39
|
Lu C, Bao Z, Qin C, Dai L, Zhu A. Facile fabrication of heterostructured cubic-CuFe2O4/ZnO nanofibers (c-CFZs) with enhanced visible-light photocatalytic activity and magnetic separation. RSC Adv 2016. [DOI: 10.1039/c6ra23970f] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Photocatalytic mechanism of a c-CuFe2O4/ZnO nanofibers (c-CFZs) p–n heterojunction.
Collapse
Affiliation(s)
- Chuchu Lu
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- People's Republic of China
| | - Zhimin Bao
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- People's Republic of China
| | - Chuanxiang Qin
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- People's Republic of China
| | - Lixing Dai
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- People's Republic of China
| | - Aiping Zhu
- College of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou
- People's Republic of China
| |
Collapse
|
40
|
Shao YB, Wang LH, Huang JH. ZnS/CuS nanotubes for visible light-driven photocatalytic hydrogen generation. RSC Adv 2016. [DOI: 10.1039/c6ra17046c] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
ZnS/CuS nanotubes exhibit visible-light photocatalytic activity for H2 evolution without cocatalysts, resulting from the heterojunctions between ZnS and CuS nanoparticles.
Collapse
Affiliation(s)
- Yi-Biao Shao
- Department of Chemistry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Long-Hao Wang
- Department of Chemistry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Jian-Hua Huang
- Department of Chemistry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| |
Collapse
|
41
|
Zhu L, Wang L, Bing N, Li P, Wang L, Huang C, Liao G. In situ synthesis of N-doped carbon nanotubes–BiOCl nanocomposites and their synergistic photocatalytic performance. RSC Adv 2016. [DOI: 10.1039/c5ra24149a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
N-Doped carbon nanotube–BiOCl (NCB) nanocomposites were prepared by an in situ growth strategy. The NCB nanocomposites possessed enhanced photocatalytic efficiency, compared with CNxNTs, BiOCl 3D flower-like hierarchitectures, and P25.
Collapse
Affiliation(s)
- LuPing Zhu
- School of Environmental and Materials Engineering
- Shanghai Second Polytechnic University
- Shanghai
- China
- Environmental Remediation Materials Unit
| | - LingLing Wang
- School of Environmental and Materials Engineering
- Shanghai Second Polytechnic University
- Shanghai
- China
| | - NaiCi Bing
- School of Environmental and Materials Engineering
- Shanghai Second Polytechnic University
- Shanghai
- China
| | - Peng Li
- Environmental Remediation Materials Unit
- National Institute for Materials Science (NIMS)
- Tsukuba
- Japan
| | - LiJun Wang
- School of Environmental and Materials Engineering
- Shanghai Second Polytechnic University
- Shanghai
- China
| | - Chao Huang
- Department of Physics and Materials Science
- City University of Hong Kong
- China
| | - GuiHong Liao
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| |
Collapse
|
42
|
Sun X, Liu X, Deng X, Xu X. Synthesis of Zn-doped In2O3nano sphere architectures as a triethylamine gas sensor and photocatalytic properties. RSC Adv 2016. [DOI: 10.1039/c6ra16789f] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Zn-doped In2O3nano spheres (ZIO NSs) were synthesized by calcining the precipitates prepared through a facile one-step hydrothermal synthesis method.
Collapse
Affiliation(s)
- Xin Sun
- School of Physics and Technology
- University of Jinan
- Jinan
- People's Republic of China
| | - Xiaojing Liu
- School of Physics and Technology
- University of Jinan
- Jinan
- People's Republic of China
| | - Xiaolong Deng
- School of Physics and Technology
- University of Jinan
- Jinan
- People's Republic of China
| | - Xijin Xu
- School of Physics and Technology
- University of Jinan
- Jinan
- People's Republic of China
| |
Collapse
|
43
|
Xiao J, Xie Y, Cao H, Nawaz F, Zhang S, Wang Y. Disparate roles of doped metal ions in promoting surface oxidation of TiO 2 photocatalysis. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2015.09.013] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
44
|
Alsawat M, Altalhi T, Gulati K, Santos A, Losic D. Synthesis of Carbon Nanotube-Nanotubular Titania Composites by Catalyst-Free CVD Process: Insights into the Formation Mechanism and Photocatalytic Properties. ACS APPLIED MATERIALS & INTERFACES 2015; 7:28361-8. [PMID: 26587676 DOI: 10.1021/acsami.5b08956] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
This work presents the synthesis of carbon nanotubes (CNTs) inside titania nanotube (TNTs) templates by a catalyst-free chemical vapor deposition (CVD) approach as composite platforms for photocatalytic applications. The nanotubular structure of TNTs prepared by electrochemical anodization provides a unique platform to grow CNTs with precisely controlled geometric features. The formation mechanism of carbon nanotubes inside nanotubular titania without using metal catalysts is explored and explained. The structural features, crystalline structures, and chemical composition of the resulting CNTs-TNTs composites were systematically characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. The deposition time during CVD process was used to determine the formation mechanism of CNTs inside TNTs template. The photocatalytic properties of CNTs-TNTs composites were evaluated via the degradation of rhodamine B, an organic model molecule, in aqueous solution under mercury-xenon Hg (Xe) lamp irradiation monitored by UV-visible spectroscopy. The obtained results reveal that CNTs induces a synergestic effect on the photocatalytic activity of TNTs for rhodamine B degradation, opening new opportunities to develop advanced photocatalysts for environmental and energy applications.
Collapse
Affiliation(s)
- Mohammed Alsawat
- School of Chemical Engineering, The University of Adelaide , Adelaide, South Australia 5005, Australia
- Department of Chemistry, Faculty of Science, Taif University , Taif, Saudi Arabia
| | - Tariq Altalhi
- School of Chemical Engineering, The University of Adelaide , Adelaide, South Australia 5005, Australia
- Department of Chemistry, Faculty of Science, Taif University , Taif, Saudi Arabia
| | - Karan Gulati
- School of Chemical Engineering, The University of Adelaide , Adelaide, South Australia 5005, Australia
| | - Abel Santos
- School of Chemical Engineering, The University of Adelaide , Adelaide, South Australia 5005, Australia
| | - Dusan Losic
- School of Chemical Engineering, The University of Adelaide , Adelaide, South Australia 5005, Australia
| |
Collapse
|
45
|
Ida S. Development of Light Energy Conversion Materials Using Two-Dimensional Inorganic Nanosheets. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2015. [DOI: 10.1246/bcsj.20150183] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Shintaro Ida
- Department of Applied Chemistry, Faculty of Engineering, Kyushu University
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University
- PRESTO, Japan Science and Technology Agency (JST)
| |
Collapse
|
46
|
Siddiqa A, Masih D, Anjum D, Siddiq M. Cobalt and sulfur co-doped nano-size TiO2 for photodegradation of various dyes and phenol. J Environ Sci (China) 2015; 37:100-109. [PMID: 26574093 DOI: 10.1016/j.jes.2015.04.024] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Revised: 03/31/2015] [Accepted: 04/08/2015] [Indexed: 06/05/2023]
Abstract
Various compositions of cobalt and sulfur co-doped titania nano-photocatalyst are synthesized via sol-gel method. A number of techniques including X-ray diffraction (XRD), ultraviolet-visible (UV-Vis), Rutherford backscattering spectrometry (RBS), thermal gravimetric analysis (TGA), Raman, N2 sorption, electron microscopy are used to examine composition, crystalline phase, morphology, distribution of dopants, surface area and optical properties of synthesized materials. The synthesized materials consisted of quasispherical nanoparticles of anatase phase exhibiting a high surface area and homogeneous distribution of dopants. Cobalt and sulfur co-doped titania demonstrated remarkable structural and optical properties leading to an efficient photocatalytic activity for degradation of dyes and phenol under visible light irradiations. Moreover, the effect of dye concentration, catalyst dose and pH on photodegradation behavior of environmental pollutants and recyclability of the catalyst is also examined to optimize the activity of nano-photocatalyst and gain a better understanding of the process.
Collapse
Affiliation(s)
- Asima Siddiqa
- KAUST Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia; National Centre for Physics, Quaid-i-Azam University Complex, Islamabad 44000, Pakistan; Chemistry Department, Quaid-i-Azam University, Islamabad 44000, Pakistan
| | - Dilshad Masih
- KAUST Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia.
| | - Dalaver Anjum
- Imaging and Characterization Lab, KAUST, Thuwal 23955, Saudi Arabia
| | - Muhammad Siddiq
- Chemistry Department, Quaid-i-Azam University, Islamabad 44000, Pakistan.
| |
Collapse
|
47
|
Xiang Q, Cheng B, Yu J. Photokatalysatoren auf Graphenbasis für die Produktion von Solarbrennstoffen. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201411096] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
48
|
Xiang Q, Cheng B, Yu J. Graphene-Based Photocatalysts for Solar-Fuel Generation. Angew Chem Int Ed Engl 2015; 54:11350-66. [PMID: 26079429 DOI: 10.1002/anie.201411096] [Citation(s) in RCA: 615] [Impact Index Per Article: 68.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2014] [Indexed: 12/29/2022]
Abstract
The production of solar fuel through photocatalytic water splitting and CO2 reduction using photocatalysts has attracted considerable attention owing to the global energy shortage and growing environmental problems. During the past few years, many studies have demonstrated that graphene can markedly enhance the efficiency of photocatalysts for solar-fuel generation because of its unique 2D conjugated structure and electronic properties. Herein we summarize the recent advances in the application of graphene-based photocatalysts for solar-fuel production, including CO2 reduction to hydrocarbon fuel and water splitting to H2. A brief overview of the fundamental principles for splitting of water and reduction of CO2 is given. The different roles of graphene in these graphene-based photocatalysts for improving photocatalytic performance are discussed. Finally, the perspectives on the challenges and opportunities for future research in this promising area are also presented.
Collapse
Affiliation(s)
- Quanjun Xiang
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070 (P.R. China)
| | - Bei Cheng
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070 (P.R. China)
| | - Jiaguo Yu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070 (P.R. China). .,Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589 (Saudi Arabia) http://www.researcherid.com/rid/G-4317-2010.
| |
Collapse
|
49
|
Pan J, Li X, Zhao Q, Zhang D. Synthesis of novel Zn0.5Mg0.5Fe2O4@TiO2 nanotube arrays with enhanced photoelectrocatalytic properties. RSC Adv 2015. [DOI: 10.1039/c5ra06443k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Zn0.5Mg0.5Fe2O4 nanoparticles contribute to widening of the spectral response range and reducing the charge recombination of TiO2 nanotube arrays.
Collapse
Affiliation(s)
- Jingqiang Pan
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE)
- State Key Laboratory of Fine Chemicals
- School of Environmental Science and Technology
- Dalian University of Technology
- Dalian 116024
| | - Xinyong Li
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE)
- State Key Laboratory of Fine Chemicals
- School of Environmental Science and Technology
- Dalian University of Technology
- Dalian 116024
| | - Qidong Zhao
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE)
- State Key Laboratory of Fine Chemicals
- School of Environmental Science and Technology
- Dalian University of Technology
- Dalian 116024
| | - Dongke Zhang
- Centre for Energy (M473)
- The University of Western Australia
- Crawley
- Australia
| |
Collapse
|
50
|
Kumar SG, Rao KSRK. Zinc oxide based photocatalysis: tailoring surface-bulk structure and related interfacial charge carrier dynamics for better environmental applications. RSC Adv 2015. [DOI: 10.1039/c4ra13299h] [Citation(s) in RCA: 583] [Impact Index Per Article: 64.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Surface-bulk modification of zinc oxide for efficient photocatalysis.
Collapse
Affiliation(s)
- S. Girish Kumar
- Department of Physics
- Indian Institute of Science
- Bangalore-560012
- India
| | | |
Collapse
|