1
|
Selvaraj V, Mahboub HH, Ganapathi U, Chandran SK, Al-Onazi W, Al-Mohaimeed AM, Chen TW, Faggio C, Paulraj B. Enhanced photodegradation of methylene blue from aqueous solution using Al-doped ZnS nanoparticles. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:73528-73541. [PMID: 35622286 DOI: 10.1007/s11356-022-20634-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 05/01/2022] [Indexed: 06/15/2023]
Abstract
The post-transition semiconducting material of pure zinc sulfide (ZnS) and various concentrations of aluminum (Al) (2.5 wt%, 5.0% wt, 7.5 wt%, and 10% calcined at 200 °C) doped ZnS nanoparticles (NPs) were synthesized by sol-gel procedure. The crystal-like nature and phase structure of the product were examined by powder XRD analysis. This analysis shows that the pure ZnS nanoparticle does not form any secondary phase. The functional group of synthesized materials was analyzed by FTIR examination. The energy gap of the materials is calculated using electro-optic analysis and the Kubelka-Munk equation varies from 3.04 nm to 3.63 nm. The photoluminescence studies show the wide emissions (blue to green) for pure ZnS and Al-doped ZnS nanomaterials. The SEM images show the spherical structure and the agglomerated nanostructures. The presence of Zn, S, and Al are confirmed by EDAX spectra. From HR-TEM studies, pure ZnS and Al-doped ZnS nanoparticles exhibit uniform particle sizes. The rate of degradation was observed using MB dye. MB dye has maximum wavelength (λmax) of 664 nm. The dye degradation efficiency was improved as the dye ratio increased. Photocatalytic activities studies show the intensity of photocatalytic activities decreased for the maximum time interval. Doping of Al in ZnS boosts the photocatalytic activity. Hence, Al-doped ZnS appears to be better decomposing MB dye when exposed to visible light.
Collapse
Affiliation(s)
- Vijayan Selvaraj
- Department of Physics, Govt. Arts College, Coimbatore, Tamilnadu, India
- Department of Physics, MGR College, Hosur, Tamilnadu, India
| | - Heba H Mahboub
- Department of Fish Diseases and Management, Faculty of Veterinary Medicine, Zagazig University, P.O. Box 44511, Zagazig, Sharkia, Egypt
| | - Umadevi Ganapathi
- Department of Physics, Govt. Arts College, Coimbatore, Tamilnadu, India.
| | | | - Wedad Al-Onazi
- Department of Chemistry, College of Science, King Saud University, P.O. Box 22452, Riyadh, 11495, Saudi Arabia
| | - Amal Mohammed Al-Mohaimeed
- Department of Chemistry, College of Science, King Saud University, P.O. Box 22452, Riyadh, 11495, Saudi Arabia
| | - Tse-Wei Chen
- Department of Materials, Imperial College London, London, SW7 2AZ, UK
| | - Caterina Faggio
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Messina, Italy
| | - Balaji Paulraj
- PG and Research Centre in Biotechnology, MGR College, Hosur, Tamilnadu, India
| |
Collapse
|
2
|
Gul MM, Ahmad KS. Review elucidating graphene derivatives (GO/rGO) supported metal sulfides based hybrid nanocomposites for efficient photocatalytic dye degradation. REV INORG CHEM 2021. [DOI: 10.1515/revic-2021-0039] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Abstract
Photocatalysis by utilizing semiconductors for the removal of toxic pollutants has gained tremendous interest for remediation purposes. The organic pollutants usually include; pesticides, dyes and other phenolic compounds. An imperative restraint associated with the photocatalytic effectiveness of the catalyst is the rapid recombination of the light generated electrons and holes. The particle agglomeration and electron-hole recombination hinders the rate of pollutant removal. For decades, researchers have used metal-sulfides efficiently for photocatalytic dye degradation. The recent use of hybrid nanomaterials with the combination of graphene derivatives such as graphene oxide and reduced graphene oxide (GO/rGO)-metal sulfide has gained interest. These composites have displayed an impressive upsurge in the photocatalytic activity of materials. The current review describes the various researches on dye photodegradation by employing (GO/rGO)-metal sulfide, exhibiting a boosted potential for photocatalytic dye degradation. A comprehensive study on (CuS, ZnS and CdS)–GO/rGO hybrid composites have been discussed in detail for effective photocatalytic dye degradation in this review. Astonishingly improved dye degradation rates were observed in all these studies employing such hybrid composites. The several studies described in the review highlighted the varying degradation rates based on diverse research parameters and efficacy of graphene derivatives for enhancement of photocatalytic activity.
Collapse
Affiliation(s)
- Mahwash Mahar Gul
- Department of Environmental Sciences , Fatima Jinnah Women University , The Mall , 46000 , Pakistan
| | - Khuram Shahzad Ahmad
- Department of Environmental Sciences , Fatima Jinnah Women University , The Mall , 46000 , Pakistan
| |
Collapse
|
3
|
Rehman F, Memon FH, Bhatti Z, Iqbal M, Soomro F, Ali A, Thebo KH. Graphene-based composite membranes for isotope separation: challenges and opportunities. REV INORG CHEM 2021. [DOI: 10.1515/revic-2021-0035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Abstract
Graphene-based membranes have got significant attention in wastewater treatment, desalination, gas separation, pervaporation, fuel cell, energy storage applications due to their supreme properties. Recently, studies have confirmed that graphene based membranes can also use for separation of isotope due to their ideal thickness, large surface area, good affinity, 2D structure etc. Herein, we review the latest groundbreaking progresses in both theoretically and experimentally chemical science and engineering of both nanoporous and lamellar graphene-based membrane for separation of different isotopes. Especially focus will be given on the current issues, engineering hurdles, and limitations of membranes designed for isotope separation. Finally, we offer our experiences on how to overcome these issues, and present an ideas for future improvement and research directions. We hope, this article is provide a timely knowledge and information to scientific communities, and those who are already working in this direction.
Collapse
Affiliation(s)
- Faisal Rehman
- Department of Mechatronics Engineering , College of EME, National University of Sciences and Technology (NUST) , Peshawar Road , Rawalpindi , Pakistan
| | - Fida Hussain Memon
- Department of Electrical Engineering , Sukkur IBA University , Sindh , Pakistan
| | - Zubeda Bhatti
- Department of Physics and Electronics , Shah Abdul Latif University , Khairpur Mirs , 66020 , Pakistan
| | - Muzaffar Iqbal
- Department of Chemistry , Faculty of Natural Science, The University of Haripur KPK , Haripur , 22620 , Pakistan
| | - Faheeda Soomro
- Department of Linguistics and Human Sciences , Begum Nusrat Bhutto Women University , Sukkur Sindh Pakistan
| | - Akbar Ali
- Department of Molecular Engineering , Faculty of Process and Environmental Engineering, Lodz University of Technology , Lodz , Poland
| | - Khalid Hussain Thebo
- Institute of Metal Research, Chinese Academy of Sciences (UCAS) , Shenyang , China
| |
Collapse
|
4
|
Bhatti SA, Memon FH, Rehman F, Bhatti Z, Naqvi T, Thebo KH. Recent progress in decontamination system against chemical and biological materials: challenges and future perspectives. REV INORG CHEM 2021. [DOI: 10.1515/revic-2021-0019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Abstract
Environmental contamination is one of the key issues of developing countries in recent days, and several types of methods and technologies have been developed to overcome these issues. This paper highlights the importance of decontamination in a contaminated environment that normally precedes protection, detection and identification followed by medical support. Further, this paper especially focuses on individual and collective NBC decontamination required on navy ships and correspondingly presents solutions (viable and economical) through the use of indigenously developed decontamination equipment. The paper also highlights the integration of various decontamination technologies with pre-existing ship decontamination systems, indicating the need for various decontaminants. Finally, we will also focus on new decontamination systems based on nanomaterials and enzymes and their utilization.
Collapse
Affiliation(s)
- Saeed Akhtar Bhatti
- Department of Defence & Strategic Studies , Quaid-i-Azam University , Islamabad , 45320 , Pakistan
| | - Fida Hussain Memon
- Department of Electrical Engineering , Sukkur IBA University , Sukkur , Sindh , Pakistan
| | - Faisal Rehman
- Department of Mechatronics Engineering , College of EME, National University of Sciences and Technology (NUST) , Peshawar Road , Rawalpindi , Pakistan
| | - Zubeda Bhatti
- Department of Physics and Electronics , Shah Abdul Latif University , Khairpur Mirs , 66020 , Pakistan
| | - Tehsin Naqvi
- Department of Defence & Strategic Studies , Quaid-i-Azam University , Islamabad , 45320 , Pakistan
| | - Khalid Hussain Thebo
- Institute of Metal Research, Chinese Academy of Sciences (UCAS) , Shenyang , China
| |
Collapse
|
5
|
Jaffri SB, Ahmad KS. Newfangled progressions in the charge transport layers impacting the stability and efficiency of perovskite solar cells. REV INORG CHEM 2021. [DOI: 10.1515/revic-2021-0004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Organic-inorganic lead halide perovskite solar cells have rapidly emerged as a newfangled material for solar energy harnessing. Perovskite solar cells have succeeded in gaining a power conversion efficiency of 25% in the last year, further enhancement in the efficiency is anticipated due to advanced engineering of the different components making up the complete cell architecture with enhanced performance, stability and efficiency. Significant components of perovskite solar cell configurational architecture are the electron transport layer, active perovskite absorber layer, hole transport layer and counter electrode. Considering the profound role of transport layers in charge mobility, current review has particularly elucidated the advancements in the charge transport layers. The time duration of the review is from 2010 to 2021. However, the special focus has been laid on the recent articles. The influence of different organic and inorganic materials used for development of transport layers influencing the cell performance have been summarized. Materials used for transport layers have been modified by utilization of myriad of engineered substances through doping and surface functionalization strategies but every method have been marked by posing serious challenges towards the stability and efficiency of the cell and thus, hindering its commercialization. The review also provides an elucidation of the mechanical challenges and abatement strategies. These strategies are associated with the charge transport layers for enhancement of cell functionality.
Collapse
Affiliation(s)
- Shaan Bibi Jaffri
- Department of Environmental Sciences , Fatima Jinnah Women University , The Mall, 46000 , Rawalpindi , Pakistan
| | - Khuram Shahzad Ahmad
- Department of Environmental Sciences , Fatima Jinnah Women University , The Mall, 46000 , Rawalpindi , Pakistan
| |
Collapse
|