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Razali NAM, Salleh WNW, Mohamed MA, Aziz F, Jye LW, Yusof N, Ismail AF. Visible light- and dark-driven degradation of palm oil mill effluent (POME) over g-C 3N 4 and photo-rechargeable WO 3. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-34081-4. [PMID: 38958863 DOI: 10.1007/s11356-024-34081-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 06/18/2024] [Indexed: 07/04/2024]
Abstract
The investigations of real industrial wastewater, such as palm oil mill effluent (POME), as a recalcitrant pollutant remain a subject of global water pollution concern. Thus, this work introduced the preparation and modification of g-C3N4 and WO3 at optimum calcination temperature, where they were used as potent visible light-driven photocatalysts in the degradation of POME under visible light irradiation. Herein, g-C3N4-derived melamine and WO3 photocatalyst were obtained at different calcination temperatures in order to tune their light absorption ability and optoelectronics properties. Both photocatalysts were proven to have their distinct phases, crystallinity levels, and elements with increasing temperature, as demonstrated by the ultraviolet-visible spectroscopy (UV-Vis), X-ray diffraction analysis (XRD), thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FTIR), Brunauer-Emmett-Teller (BET), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) results. Significantly, g-C3N4 (580 °C) and WO3 (450 °C) unitary photocatalysts exhibited the highest removal efficiency of POME without dilution due to good crystallinity, extended light absorption, high separation, and less recombination efficiency of electron-hole pairs. Furthermore, surprisingly, the superior energy storage photocatalytic performance with outstanding stability by WO3 achieved an approximately 10% increment during darkness, compared with g-C3N4 under visible light irradiation. Moreover, it has been proven that the WO3 and g-C3N4 photocatalysts are desirable photocatalysts for various pollutant degradations, with excellent visible-light utilization and favorable energy storage application.
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Affiliation(s)
- Nur Aqilah Mohd Razali
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
| | - Wan Norharyati Wan Salleh
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia.
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia.
| | | | - Farhana Aziz
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
| | - Lau Woei Jye
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
| | - Norhaniza Yusof
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
| | - Ahmad Fauzi Ismail
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
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Barhoi A, Mahto B, Ali H, Hussain S. Glutathione-Mediated Synthesis of WO 3 Nanostructures with Controllable Morphology/Phase for Energy Storage, Photoconductivity, and Photocatalytic Applications. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:10070-10084. [PMID: 38701115 DOI: 10.1021/acs.langmuir.4c00199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2024]
Abstract
Developing an improved synthesis method that controls the morphology and crystal phase remains a substantial challenge. Herein, we report phase and morphology-controlled hydrothermal synthesis of tungsten oxides by varying acid concentration and utilizing glutathione (GSH) as a structural directing agent, together with the exploration of their applications in supercapacitors, photoconductivity, and photocatalysis. Orthorhombic hydrated tungsten oxide (WO3·0.33H2O) with nonuniform block and plate-like morphology was obtained at 3 M hydrochloric acid (HCl). In contrast, nonhydrated monoclinic tungsten oxide (WO3) with smaller rectangular blocks was obtained at 6 M HCl. Further, the addition of GSH results in an increase in the surface area of the materials along with a narrowing of the band gap. Moreover, it plays a pivotal role in regulating the morphology through oriented attachments, Ostwald ripening, and the self-assembly of WO3 nuclei. GHTO and GTO polymorphs showed pseudocapacitive behavior with the highest specific capacitances of 450 and 300 F g-1 at 0.5 A g-1, maintaining 94 and 92% retention stability, respectively, over 1000 cycles at 2 A g-1. Also, the synthesized materials displayed favorable photoconductivity under light irradiation, implying potential utilization in photovoltaic applications. Moreover, these materials exhibited remarkable photocatalytic performance in the degradation of methylene blue (MB) dye, establishing themselves as highly effective photocatalysts. Therefore, nanostructured tungsten oxide showcases its versatility, rendering it an appealing candidate for energy storage, photovoltaic systems, and photocatalysis.
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Affiliation(s)
- Ashok Barhoi
- Department of Chemistry, Indian Institute of Technology Patna, Bihta, Patna 801103, India
| | - Bhagirath Mahto
- Department of Chemistry, Indian Institute of Technology Patna, Bihta, Patna 801103, India
| | - Haider Ali
- Department of Chemistry, Indian Institute of Technology Patna, Bihta, Patna 801103, India
| | - Sahid Hussain
- Department of Chemistry, Indian Institute of Technology Patna, Bihta, Patna 801103, India
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Jeyavani V, Mukherjee SP. Crystal Phase and Morphology-Controlled Synthesis of Tungsten Oxide Nanostructures for Remarkably Ultrafast Adsorption and Separation of Organic Dyes. Inorg Chem 2022; 61:18119-18134. [DOI: 10.1021/acs.inorgchem.2c02715] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Vijayakrishnan Jeyavani
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pashan, Pune411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad201002, India
| | - Shatabdi Porel Mukherjee
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pashan, Pune411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad201002, India
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Gasso S, Mahajan A. Development of Highly Sensitive and Humidity Independent Room Temeprature NO 2 Gas Sensor Using Two Dimensional Ti 3C 2T x Nanosheets and One Dimensional WO 3 Nanorods Nanocomposite. ACS Sens 2022; 7:2454-2464. [PMID: 35944209 DOI: 10.1021/acssensors.2c01213] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Room temperature gas sensors have been widely explored in gas sensor technology for real-time applications. However, humidity has found to affect the room temperature sensing and the sensor life, necessitating the development of novel sensing materials with high sensitivity and stability under humid conditions at room temperature. In this work, the room temperature sensing performance of a Ti3C2Tx decorated, WO3 nanorods based nanocomposite has been investigated. The hydrothermally synthesized WO3/Ti3C2Tx nanocomposite has been investigated for structural, morphological, and electrical studies using X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, and Brunanuer-Emmett-Teller techniques. The WO3/Ti3C2Tx sensors have been found to be highly selective to NO2 at room temperature and exhibit much higher sensitivity in comparison to pristine WO3 nanorods. Furthermore, sodium l-ascorbate treated Ti3C2Tx sheets in WO3/Ti3C2Tx enhanced the stability and reversibility of the sensor toward NO2 even under variable humidity conditions (0-99% relative humidity). This study shows the potential room temperature sensing application of a WO3/Ti3C2Tx nanocomposite-based sensor for detecting NO2 at sub-ppb level. Further, a plausible sensing mechanism based on WO3/Ti3C2Tx nanocomposite has been proposed to explain the improved sensing characteristics.
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Affiliation(s)
- Sahil Gasso
- Department of Physics, Guru Nanak Dev University, Amritsar143 005, India
| | - Aman Mahajan
- Department of Physics, Guru Nanak Dev University, Amritsar143 005, India
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