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Castanheira B, Brochsztain S, Otubo L, Teixeira ACSC. Periodic mesoporous organosilicas containing naphthalenediimides as organic sensitizers for sulfadiazine photodegradation. JOURNAL OF HAZARDOUS MATERIALS 2023; 443:130224. [PMID: 36345058 DOI: 10.1016/j.jhazmat.2022.130224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 09/27/2022] [Accepted: 10/19/2022] [Indexed: 06/16/2023]
Abstract
In this work, periodic mesoporous organosilicas (PMO) functionalized with the organic sentisizer naphthalenediimide (NDI) were employed as heterogeneous catalysts for the photodegradation of the antibiotic sulfadiazine (SDZ), taken as a model for contaminants of emerging concern (CECs). The catalysts, designated as PMONDI, were prepared by surfactant-directed co-condensation of the precursor N,N'-bis(3-triethoxysilylpropyl)- 1,4,5,8-naphthalenediimide with tetraethoxysilane. The synthesized PMONDI were characterized using transmission electron microscopy, nitrogen adsorption isotherms and small and large angle x-ray scattering. The performance of PMONDI catalysts in the photodegradation of SDZ was compared to that of TiO2 nanoparticles impregnated into SBA-15 mesoporous silica (TiO2/SBA-15), under irradiation with a Hg lamp with a bandpass filter of 320-500 nm. Under optimal conditions, PMONDI degraded 100% of the SDZ in 45 min, while the total degradation of SDZ was achieved only after 150 min with TiO2/SBA-15. PMONDI also performed better than TiO2/SBA-15 in reuse tests. The mechanism of photodegradation with PMONDI involves the formation of excited triplet states of NDI (3NDI*) upon irradiation, which can then react with molecular oxygen to form reactive oxygen species, which degrade SDZ. Analysis of the SDZ degradation products indicated two main pathways: (1) hydroxylation of the aniline ring and (2) SO2 extrusion and rearrangement, followed by oxidation of the aniline ring to nitrobenzene. In conclusion, the great potential of the PMONDI materials as photocatalysts for CECs degradation was demonstrated in this work, encouraging further research on these materials for the degradation of pollutants.
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Affiliation(s)
- Bruna Castanheira
- Department of Chemical Engineering, University of São Paulo, Av. Prof. Luciano Gualberto, tr. 3, São Paulo 380, SP, Brazil.
| | - Sergio Brochsztain
- Federal University of ABC, Av. dos Estados, 5001, Santo André, SP 09210-580, Brazil
| | - Larissa Otubo
- Nuclear and Energy Research Institute (IPEN), Av. Prof. Lineu Prestes, 2242, São Paulo, SP 05508-000, Brazil
| | - Antonio Carlos S C Teixeira
- Department of Chemical Engineering, University of São Paulo, Av. Prof. Luciano Gualberto, tr. 3, São Paulo 380, SP, Brazil.
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Díez AM, Pazos M, Sanromán MÁ, Kolen’ko YV. GO-TiO 2 as a Highly Performant Photocatalyst Maximized by Proper Parameters Selection. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:11874. [PMID: 36231173 PMCID: PMC9565788 DOI: 10.3390/ijerph191911874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 09/13/2022] [Accepted: 09/14/2022] [Indexed: 06/16/2023]
Abstract
The synthesis and characterization of novel graphene oxide coupled to TiO2 (GO-TiO2) was carried out in order to better understand the performance of this photocatalyst, when compared to well-known TiO2 (P25) from Degussa. Thus, its physical-chemical characterization (FTIR, XRD, N2 isotherms and electrochemical measurements) describes high porosity, suitable charge and high electron mobility, which enhance pollutant degradation. In addition, the importance of the reactor set up was highlighted, testing the effect of both the irradiated area and distance between lamp and bulb solution. Under optimal conditions, the model drug methylthioninium chloride (MC) was degraded and several parameters were assessed, such as the water matrix and the catalyst reutilization, a possibility given the addition of H2O2. The results in terms of energy consumption compete with those attained for the treatment of this model pollutant, opening a path for further research.
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Affiliation(s)
- Aida M. Díez
- Nanochemistry Research Group, International Iberian Nanotechnology Laboratory, Avenida Mestre José Veiga s/n, 4715-330 Braga, Portugal
- CINTECX, Grupo de Bioingeniería y Procesos Sostenibles, Departamento de Ingeniería Química, Campus Lagoas-Marcosende, Universidade de Vigo, 36310 Vigo, Spain
| | - Marta Pazos
- CINTECX, Grupo de Bioingeniería y Procesos Sostenibles, Departamento de Ingeniería Química, Campus Lagoas-Marcosende, Universidade de Vigo, 36310 Vigo, Spain
| | - M. Ángeles Sanromán
- CINTECX, Grupo de Bioingeniería y Procesos Sostenibles, Departamento de Ingeniería Química, Campus Lagoas-Marcosende, Universidade de Vigo, 36310 Vigo, Spain
| | - Yury V. Kolen’ko
- Nanochemistry Research Group, International Iberian Nanotechnology Laboratory, Avenida Mestre José Veiga s/n, 4715-330 Braga, Portugal
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Birniwa AH, Mahmud HNME, Abdullahi SS, Habibu S, Jagaba AH, Ibrahim MNM, Ahmad A, Alshammari MB, Parveen T, Umar K. Adsorption Behavior of Methylene Blue Cationic Dye in Aqueous Solution Using Polypyrrole-Polyethylenimine Nano-Adsorbent. Polymers (Basel) 2022; 14:polym14163362. [PMID: 36015619 PMCID: PMC9412383 DOI: 10.3390/polym14163362] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Revised: 07/25/2022] [Accepted: 07/27/2022] [Indexed: 12/07/2022] Open
Abstract
In this work, a polypyrrole-polyethyleneimine (PPy-PEI) nano-adsorbent was successfully synthesized for the removal of methylene blue (MB) from an aqueous solution. Synthetic dyes are among the most prevalent environmental contaminants. A new conducting polymer-based adsorbent called (PPy-PEI) was successfully produced using ammonium persulfate as an oxidant. The PEI hyper-branched polymer with terminal amino groups was added to the PPy adsorbent to provide more effective chelating sites for dyes. An efficient dye removal from an aqueous solution was demonstrated using a batch equilibrium technique that included a polyethyleneimine nano-adsorbent (PPy-PEI). The best adsorption parameters were measured at a 0.35 g dosage of adsorbent at a pH of 6.2 and a contact period of 40 min at room temperature. The produced PPy-PEI nano-adsorbent has an average particle size of 25–60 nm and a BET surface area of 17 m2/g. The results revealed that PPy-PEI nano-composite was synthesized, and adsorption was accomplished in the minimum amount of time. The maximum monolayer power, qmax, for MB was calculated using the isothermal adsorption data, which matched the Langmuir isotherm model, and the kinetic adsorption data, which more closely fitted the Langmuir pseudo-second-order kinetic model. The Langmuir model was used to calculate the maximum monolayer capacity, or qmax, for MB, which was found to be 183.3 mg g−1. The as-prepared PPy-PEI nano-adsorbent totally removes the cationic dyes from the aqueous solution.
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Affiliation(s)
- Abdullahi Haruna Birniwa
- Department of Chemistry, Sule Lamido University, Kafin-Hausa P.M.B 048, Nigeria
- Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Habibun Nabi Muhammad Ekramul Mahmud
- Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
- Correspondence: (H.N.M.E.M.); (K.U.); Tel.: +(604)-6533567 (K.U.); Fax: +(604)-6574854 (K.U.)
| | - Shehu Sa’ad Abdullahi
- Department of Polymer Technology, Hussaini Adamu Federal Polytechnic Kazaure, Kazaure P.M.B 5004, Nigeria
| | - Shehu Habibu
- Department of Chemistry, Faculty of Science, Federal University Dutse, Dutse P.M.B 7156, Nigeria
| | - Ahmad Hussaini Jagaba
- Department of Civil and Environmental Engineering, Universiti Teknologi Petronas, Seri Iskandar 32610, Malaysia
| | - Mohamad Nasir Mohamad Ibrahim
- Materials Technology Research Group (MaTRec), School of Chemical Sciences, Universiti Sains Malaysia, Gelugor 11800, Malaysia
| | - Akil Ahmad
- Chemistry Department, College of Sciences and Humanities, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Mohammed B. Alshammari
- Chemistry Department, College of Sciences and Humanities, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Tabassum Parveen
- Department of Botany, Aligarh Muslim University, Aligarh 202002, India
| | - Khalid Umar
- Materials Technology Research Group (MaTRec), School of Chemical Sciences, Universiti Sains Malaysia, Gelugor 11800, Malaysia
- Correspondence: (H.N.M.E.M.); (K.U.); Tel.: +(604)-6533567 (K.U.); Fax: +(604)-6574854 (K.U.)
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Saravanan A, Kumar PS, Jeevanantham S, Anubha M, Jayashree S. Degradation of toxic agrochemicals and pharmaceutical pollutants: Effective and alternative approaches toward photocatalysis. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 298:118844. [PMID: 35032600 DOI: 10.1016/j.envpol.2022.118844] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 12/27/2021] [Accepted: 01/09/2022] [Indexed: 06/14/2023]
Abstract
Emerging concern regarding the remediation of environmental pollution has expanded tremendously in recent years. Pharmaceutical industries and agricultural sectors release an enormous amount of residues containing toxic pollutants at trace levels which poses a serious impact on the environment and human health. To cope with the effect of hazardous and toxic contaminants, numerous methodologies have been developed for the treatment of effluents released from the agrochemical and pharmaceutical industries. Amongst them, photocatalysis has gained much more attention for the degradation of pollutants due to its low cost, higher capability, green and eco-friendly approaches. Photocatalysts are the substrate that plays a key role in pollutant removal through photocatalysis by accelerating the necessary chemical reactions using a light source. In this review, the recent progress on photocatalysis and its fundamental mechanism in agrochemicals and pharmaceutical pollutant degradation was summarized. This review concisely discusses the incorporation of various metal oxides and nanomaterials into semiconductors for the effective degradation of contaminants. The current status and future research on different sectors and the difficulties in the photocatalytic removal of agrochemical and pharmaceutical pollutants are also reviewed in detail.
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Affiliation(s)
- A Saravanan
- Department of Energy and Environmental Engineering, Saveetha School of Engineering, SIMATS, Chennai, 602105, India
| | - P Senthil Kumar
- Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Chennai, 603110, India; Centre of Excellence in Water Research (CEWAR), Sri Sivasubramaniya Nadar College of Engineering, Chennai, 603110, India.
| | - S Jeevanantham
- Department of Biotechnology, Rajalakshmi Engineering College, Chennai, 602105, India
| | - M Anubha
- Department of Biotechnology, Rajalakshmi Engineering College, Chennai, 602105, India
| | - S Jayashree
- Department of Biotechnology, Rajalakshmi Engineering College, Chennai, 602105, India
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