Bio-capped and green synthesis of ZnO/g-C3N4 nanocomposites and its improved antibiotic and photocatalytic activities: An exceptional approach towards environmental remediation

Khan, Iltaf; Wang, Chunjuan; Khan, Shoaib; Chen, Jinyin; Khan, Aftab Aslam Parwaz; Shah, Sayyar Ali; AihuaYuan,; Khan, Sohail Ahmed; Butt, Mehwish Khalid; Asghar, Humaira

doi:10.1016/j.cjche.2022.07.031

Cited by 28 publications

(15 citation statements)

References 45 publications

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“…The XRD patterns indicate that Zn(OH) 2 and g-C 3 N 4 peaks are present in the CN/Z- x nanocomposite (Figure c). The XRD patterns are in agreement with the results of a study conducted by Garg et al In bulk g-C 3 N 4 , two peaks were found at 27.8 and 13° attributed to interlayer diffraction and tri- s -triazine units, indexed as (100) and (002) planes, respectively . For the pristine Zn(OH) 2 , XRD patterns indicated a hexagonal ZnO phase (96-210-7060) in accordance with JCPDS files.…”

Section: Resultsmentioning

confidence: 94%

“…The XRD patterns are in agreement with the results of a study conducted by Garg et al 48 In bulk g-C 3 N 4 , two peaks were found at 27.8 and 13°attributed to interlayer diffraction and tri-s-triazine units, indexed as (100) and (002) planes, respectively. 59 For the pristine Zn(OH) 2 , XRD patterns indicated a hexagonal ZnO phase (96-210-7060) in accordance with JCPDS files. Nanoparticles of ZnO/Zn(OH) 2 exhibit a similar diffraction pattern to ZnO, whose major phase was hexagonal wurtzite ZnO.…”

Section: 56mentioning

confidence: 98%

“…Nanoparticles of ZnO/Zn(OH) 2 exhibit a similar diffraction pattern to ZnO, whose major phase was hexagonal wurtzite ZnO. 59,60 In comparison to pristine ZnO, a ZnO/Zn(OH) 2 nanoparticle exhibits additional peaks at 32.6 and 33.4°, corresponding to Zn(OH) 2 . Zn(OH) 2 dispersed over g-C 3 N 4 nanosheets had an average crystal size of 11.6 nm based on the Debye−Scherer equation.…”

Section: 56mentioning

confidence: 98%

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Development of Self-Cleaning g-C₃N₄/Zn(OH)₂ Nanocomposite-Coated Mesh for Oil–Water Emulsion Separation

Mir

Naderifar

Rashidi³

et al. 2023

Ind. Eng. Chem. Res.

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It has been widely recognized that efficient approaches to water–oil separation need to be developed and designed. It is the objective of this study to improve and optimize the performance of g-C3N4 for oil–water separation by anchoring Zn(OH)2. Additionally, the as-prepared g-C3N4/Zn(OH)2 nanocomposites containing different amounts of Zn(OH)2 were investigated to determine the effect of two factors of porosity and surface defects in the water-removing of oil–water mixtures. The results show that oxygen-containing groups in this specific g-C3N4/Zn(OH)2 nanocomposite have a greater impact on wettability behavior and water-removing separation performance than porosity. Density functional theory (DFT) calculations demonstrated that the adsorption energy of water is larger than that of oil molecules on the g-C3N4/Zn(OH)2, confirming that the prepared coated mesh can be used as a potential material for water–oil separation. Moreover, the self-cleaning property of the nanocomposite-coated mesh was demonstrated by the removal of adsorbed oil in contact with the surface. In this study, it was also attempted to perform water and oil separation with good performance. Therefore, the perfluorooctanoic acid (PFOA) was also used to reduce energy in g-C3N4@Zn(OH)2@PFOA mesh, leading to super-hydrophilic/super-oleophobic wettability. Ultimately, a new mesh coated with g-C3N4@Zn(OH)2@PFOA nanocomposite was successfully separated oil-in-water emulsion with a high efficiency of 99.99%.

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Section: Resultsmentioning

confidence: 94%

Section: 56mentioning

confidence: 98%

Section: 56mentioning

confidence: 98%

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Development of Self-Cleaning g-C₃N₄/Zn(OH)₂ Nanocomposite-Coated Mesh for Oil–Water Emulsion Separation

Mir

Naderifar

Rashidi³

et al. 2023

Ind. Eng. Chem. Res.

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“…Numerous studies have shown that LSPR in plasmonic materials can improve charge separation and light absorption, which significantly increases photocatalytic efficiency [ 24 , 25 ]. Various physical, biological and chemical processes have been extensively used for the preparation of plasmonic photocatalysts [ 26 , 27 ]. In 2008 [ 28 ], Awazu et al introduced the term “plasmonic photocatalyst”.…”

Section: Introductionmentioning

confidence: 99%

A review on plasmonic-based heterojunction photocatalysts for degradation of organic pollutants in wastewater

et al. 2023

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Organic pollutants in wastewater are the biggest problem facing the world today due to population growth, rapid increase in industrialization, urbanization, and technological advancement. There have been numerous attempts to use conventional wastewater treatment techniques to address the issue of worldwide water contamination. However, conventional wastewater treatment has a number of shortcomings, including high operating costs, low efficiency, difficult preparation, fast recombination of charge carriers, generation of secondary waste, and limited light absorption. Therefore, plasmonic-based heterojunction photocatalysts have attracted much attention as a promising method to reduce organic pollutant problems in water due to their excellent efficiency, low operating cost, ease of fabrication, and environmental friendliness. In addition, plasmonic-based heterojunction photocatalysts contain a local surface plasmon resonance that enhances the performance of photocatalysts by improving light absorption and separation of photoexcited charge carriers. This review summarizes the major plasmonic effects in photocatalysts, including hot electron, local field effect, and photothermal effect, and explains the plasmonic-based heterojunction photocatalysts with five junction systems for the degradation of pollutants. Recent work on the development of plasmonic-based heterojunction photocatalysts for the degradation of various organic pollutants in wastewater is also discussed. Lastly, the conclusions and challenges are briefly described and the direction of future development of heterojunction photocatalysts with plasmonic materials is explored. This review could serve as a guide for the understanding, investigation, and construction of plasmonic-based heterojunction photocatalysts for various organic pollutants degradation. Graphical abstract Herein, the plasmonic effects in photocatalysts, such as hot electrons, local field effect, and photothermal effect, as well as the plasmonic-based heterojunction photocatalysts with five junction systems for the degradation of pollutants are explained. Recent work on plasmonic-based heterojunction photocatalysts for the degradation of various organic pollutants in wastewater such as dyes, pesticides, phenols, and antibiotics is discussed. Challenges and future developments are also described.

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“…Antibiotics are considered novel organic byproducts that are frequently used in all other medicines. Recently, a great number of antibiotics have been used for the treatment of various bacterial diseases . The global market is experiencing a rapid depletion of antibiotics, with an annual production rate of 100 000–200 000 tons .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Metal–Organic Framework-Based ZIF-8@ZIF-67 Nanocomposites for Antibiotic Decomposition and Antibacterial Activities

Sadiq,

Khan,

Humayun

et al. 2023

ACS Omega

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Toxic antibiotic effluents and antibiotic-resistant bacteria constitute a threat to global health. So, scientists are investigating high-performance materials for antibiotic decomposition and antibacterial activities. In this novel research work, we have successfully designed ZIF-8@ZIF-67 nanocomposites via sol–gel and solvothermal approaches. The ZIF-8@ZIF-67 nanocomposite is characterized by various techniques that exhibit superior surface area enhancement, charge separation, and high light absorption performance. Yet, ZIF-8 has high adsorption rates and active sites, while ZIF-67 has larger pore volume and efficient adsorption and reaction capabilities, demonstrating that the ZIF-8@ZIF-67 nanocomposite outperforms pristine ZIF-8 and ZIF-67. Compared with pristine ZIF-8 and ZIF-67, the most active 6ZIF-67@ZIF-8 nanocomposite showed higher decomposition efficacy for ciprofloxacin (65%), levofloxacin (54%), and ofloxacin (48%). Scavenger experiments confirmed that • OH, • O 2– , and h + are the most active species for the decomposition of ciprofloxacin (CIP), levofloxacin (LF), and ofloxacin (OFX), respectively. In addition, the 6ZIF-67/ZIF-8 nanocomposite suggested its potential applications in Escherichia coli for growth inhibition zone, antibacterial activity, and decreased viability. Moreover, the stability test and decomposition pathway of CIP, LF, and OFX were also proposed. Finally, our study aims to enhance the efficiency and stability of ZIF-8@ZIF-67 nanocomposite and potentially enable its applications in antibiotic decomposition, antibacterial activities, and environmental remediation.

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Bio-capped and green synthesis of ZnO/g-C3N4 nanocomposites and its improved antibiotic and photocatalytic activities: An exceptional approach towards environmental remediation

Cited by 28 publications

References 45 publications

Development of Self-Cleaning g-C₃N₄/Zn(OH)₂ Nanocomposite-Coated Mesh for Oil–Water Emulsion Separation

Development of Self-Cleaning g-C₃N₄/Zn(OH)₂ Nanocomposite-Coated Mesh for Oil–Water Emulsion Separation

A review on plasmonic-based heterojunction photocatalysts for degradation of organic pollutants in wastewater

Synthesis of Metal–Organic Framework-Based ZIF-8@ZIF-67 Nanocomposites for Antibiotic Decomposition and Antibacterial Activities

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Bio-capped and green synthesis of ZnO/g-C3N4 nanocomposites and its improved antibiotic and photocatalytic activities: An exceptional approach towards environmental remediation

Cited by 28 publications

References 45 publications

Development of Self-Cleaning g-C3N4/Zn(OH)2 Nanocomposite-Coated Mesh for Oil–Water Emulsion Separation

Development of Self-Cleaning g-C3N4/Zn(OH)2 Nanocomposite-Coated Mesh for Oil–Water Emulsion Separation

A review on plasmonic-based heterojunction photocatalysts for degradation of organic pollutants in wastewater

Synthesis of Metal–Organic Framework-Based ZIF-8@ZIF-67 Nanocomposites for Antibiotic Decomposition and Antibacterial Activities

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Product

Resources

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Development of Self-Cleaning g-C₃N₄/Zn(OH)₂ Nanocomposite-Coated Mesh for Oil–Water Emulsion Separation

Development of Self-Cleaning g-C₃N₄/Zn(OH)₂ Nanocomposite-Coated Mesh for Oil–Water Emulsion Separation