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Rahimihaghighi M, Gigli M, Ficca VCA, Placidi E, Sgarzi M, Crestini C. Lignin-Derived Sustainable Nano-Platforms: A Multifunctional Solution for an Efficient Dye Removal. CHEMSUSCHEM 2024:e202400841. [PMID: 38899482 DOI: 10.1002/cssc.202400841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2024] [Revised: 06/17/2024] [Accepted: 06/20/2024] [Indexed: 06/21/2024]
Abstract
In contrast to conventional non-biobased adsorbents, lignin emerges as a cost-effective and environmentally benign alternative for water treatment. This study identifies unexpected and unpredicted multifunctional properties of lignin nanoparticles (LNPs). LNPs, which are prepared by simple physical processes, demonstrated for the first time to behave as multifunctional materials able to adsorb and photodegrade methylene blue (MB) in aqueous medium upon UV irradiation. Furthermore, the synthetic approach adopted to synthesize LNPs - and therefore their surface properties - strongly affects their performances. More specifically, LNPs obtained by solvent-antisolvent nanoprecipitation (SLNPs) show the highest MB adsorption properties (98 % removal), reaching a maximum adsorption capacity of 43.0 mg g-1, and the fastest adsorption kinetics with respect to other lignin-based adsorbents. Conversely, hydrotropic LNPs (HLNPs) exhibit exceptional photocatalytic activity, resulting in 98 % MB degradation over 6 hours of UV irradiation, combined with the ability to be easily recycled and reused. The present effort paves the way for the use of LNPs as efficient multifunctional materials able to perform concurrently adsorption and photocatalytic degradation of dye pollutants, toward the creation of a sustainable biobased water treatment platform.
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Affiliation(s)
- Maryam Rahimihaghighi
- Department of Molecular Sciences and Nanosystems, Università Ca' Foscari Venezia, Via Torino 155, 30172, Venice Mestre, Italy
- Department of Architecture and Industrial Design, Università degli Studi della Campania "Luigi Vanvitelli", Via San Lorenzo, Abbazia di San Lorenzo, 81031, Aversa, Italy
| | - Matteo Gigli
- Department of Molecular Sciences and Nanosystems, Università Ca' Foscari Venezia, Via Torino 155, 30172, Venice Mestre, Italy
| | - Valerio C A Ficca
- Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185, Rome, Italy
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 2, 00185, Rome, Italy
| | - Ernesto Placidi
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 2, 00185, Rome, Italy
| | - Massimo Sgarzi
- Department of Molecular Sciences and Nanosystems, Università Ca' Foscari Venezia, Via Torino 155, 30172, Venice Mestre, Italy
| | - Claudia Crestini
- Department of Molecular Sciences and Nanosystems, Università Ca' Foscari Venezia, Via Torino 155, 30172, Venice Mestre, Italy
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Abstract
Pristine and modified/doped titania are still some of the most widely investigated photocatalysts due to its high activity, stability, abundance and proper redox properties to carry out various reactions. However, modifiers and/or dopants resulting in visible-light activity might be expensive or work as recombination centers under UV irradiation. It seems that defective titania, known as “self-doped” TiO2, might be the best solution since it can be obtained under mild conditions without the addition of expensive materials and methods. This review discusses various methods of defective titania preparation, characterization of defect types, their localization (surface vs. bulk) and their function, as well as proposed mechanisms of photocatalytic reactions in the presence of self-doped titania. Although many kinds of defective titania samples have already been prepared with different colors, color intensities and defect kinds (mainly Ti3+ and oxygen vacancies), it is difficult to conclude which of them are the most recommended as the preparation conditions and activity testing used by authors differ. Furthermore, activity testing under solar radiation and for dyes does not clarify the mechanism since bare titania can also be excited and sensitized, respectively, in these conditions. In many reports, authors have not considered the possible influence of some impurities originated from the synthesis method (e.g., H, Al, Zn, Cl, F) that could co-participate in the overall mechanism of photocatalytic reactions. Moreover, some reports indicate that defective titania, especially black ones, might decrease activity since the defects might work as recombination centers. Despite some unproven/unclear findings and unanswered questions, there are many well-conducted studies confirmed by both experimental and theoretical studies that defective titania might be a promising material for various photocatalytic reactions under both UV and visible-light irradiation. Based on available literature, it could be proposed that optimal defects’ concentration, the preferential role of surface defects, a higher surface-to-bulk ratio of defects in rutile than in anatase, and the beneficial impact of disordered surface are the most important aspects to be considered during the preparation of defective titania.
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Wang C, Zhang X. Anatase/Bronze TiO2 Heterojunction: Enhanced Photocatalysis and Prospect in Photothermal Catalysis. Chem Res Chin Univ 2020. [DOI: 10.1007/s40242-020-0312-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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El Rouby WM. Selective adsorption and degradation of organic pollutants over Au decorated Co doped titanate nanotubes under simulated solar light irradiation. J Taiwan Inst Chem Eng 2018. [DOI: 10.1016/j.jtice.2018.04.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Zhang P, Tachikawa T, Fujitsuka M, Majima T. Atomic Layer Deposition-Confined Nonstoichiometric TiO2 Nanocrystals with Tunneling Effects for Solar Driven Hydrogen Evolution. J Phys Chem Lett 2016; 7:1173-1179. [PMID: 26963920 DOI: 10.1021/acs.jpclett.6b00227] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Ti(3+) self-doped TiO2 nanocrystals (TNCs) confined with controllable atomic layer deposition (ALD) amorphous layers were developed to provide a novel model of metal-insulator-semiconductor (MIS) photocatalysts for hydrogen generation in the ultraviolet to near-infrared region. Photoexcitation of optimized MIS nanostructures consisting of a metal cocatalyst (Pt), electron tunneling layer (ALD TiO2), and photoactive nonstoichiometric core (Ti(3+)-doped TNC) exhibited efficient hydrogen generation (52 μmol h(-1)·g(-1)), good reusability (16 h), and long-term stability (>7 d). The charge-transfer dynamics were examined using transient absorption spectroscopy to clarify the relationship between the photocatalytic activity and the tunneling effect. Our strategies highlight defect engineering in fabricating MIS photocatalysts with improved charge separation and tailored solar energy conversion properties.
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Affiliation(s)
- Peng Zhang
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University , Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - Takashi Tachikawa
- Department of Chemistry, Graduate School of Science, Kobe University , 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan
- PRESTO, Japan Science and Technology Agency (JST) , 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Mamoru Fujitsuka
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University , Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - Tetsuro Majima
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University , Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
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Tang Y, Hao R, Fu Y, Jiang Y, Zhang X, Pan Q, Jiang B. Carbon quantum dot/mixed crystal TiO2 composites via a hydrogenation process: an efficient photocatalyst for the hydrogen evolution reaction. RSC Adv 2016. [DOI: 10.1039/c6ra17597j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
High-performance photocatalyst including mixed crystal TiO2/carbon quantum dots was obtained via a facile approach, which exhibited excellent property for hydrogen evolution under solar light.
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Affiliation(s)
- Yunqi Tang
- Key Laboratory of Functional Inorganic Material Chemistry
- Ministry of Education of the People’s Republic of China
- Heilongjiang University
- Harbin 150080
- China
| | - Rong Hao
- Key Laboratory of Functional Inorganic Material Chemistry
- Ministry of Education of the People’s Republic of China
- Heilongjiang University
- Harbin 150080
- China
| | - Yu Fu
- Key Laboratory of Functional Inorganic Material Chemistry
- Ministry of Education of the People’s Republic of China
- Heilongjiang University
- Harbin 150080
- China
| | - Yong Jiang
- Key Laboratory of Functional Inorganic Material Chemistry
- Ministry of Education of the People’s Republic of China
- Heilongjiang University
- Harbin 150080
- China
| | - Xiangcheng Zhang
- Key Laboratory of Functional Inorganic Material Chemistry
- Ministry of Education of the People’s Republic of China
- Heilongjiang University
- Harbin 150080
- China
| | - Qingjiang Pan
- Key Laboratory of Functional Inorganic Material Chemistry
- Ministry of Education of the People’s Republic of China
- Heilongjiang University
- Harbin 150080
- China
| | - Baojiang Jiang
- Key Laboratory of Functional Inorganic Material Chemistry
- Ministry of Education of the People’s Republic of China
- Heilongjiang University
- Harbin 150080
- China
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