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Rohit, Kaur S, Hussain S, Park JY, Katoch V, Parkash B, Katoch A, Jamwal D. Size dependent dual functionality of CeO 2 quantum dots: A correlation among parameters for hydrogen gas sensor and pollutant remediation. CHEMOSPHERE 2024; 364:142959. [PMID: 39069101 DOI: 10.1016/j.chemosphere.2024.142959] [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: 06/12/2024] [Revised: 07/16/2024] [Accepted: 07/26/2024] [Indexed: 07/30/2024]
Abstract
The metal oxide-based nanostructures of variable size and shape are found effective in optimizing the gas sensing ability and pollutant degradation. The size induced lattice strain and large band gap in 3nm CeO2 quantum dots evolved the ability towards hydrogen gas sensing and dye degradation compared to nanopebbles and nanoparticles of sizes 15 ± 3, and 30 ± 12 nm. The smaller CeO2 quantum dots than Debye length was found underlying reason for nearly four times sensor response and selectivity towards reducing hydrogen gases than the oxidizing gases at 1-10 ppm level. The lattice strain calculated by Rietveld refinement and W-H analysis was found in-line with the size of CeO2 nanostructures. The enhancement in lattice strain and optical band gap (2.66, 2.78, and 2.89 eV) with decrease in size are found critical for determining the overall efficiency of CeO2 nanostructures for photocatalytic activity, attributed to the strong quantum confinement effect. The higher catalytic activity of 98 % was achieved CeO2 quantum dots in comparison to the 95 % and 94 % obtained for CeO2 nanopebbles and nanoparticles. The impact of change in degradation efficacy and gas sensing ability of different CeO2 nanomaterials is discussed in detail. This work offers a novel and simplistic method to produce CeO2 quantum dots as an efficient sensor for selective detection of H2 gas and photocatalyst. The correlation between size, Debye length, band gap, and lattice strain gives an insight for understanding the underlying detection mechanism for selective detection of reducing gas molecules and efficient pollutant remediation.
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Affiliation(s)
- Rohit
- Smart Nanomaterials and Sensor Laboratory, Centre for Nanoscience and Nanotechnology, UIEAST, Panjab University, Chandigarh, 160014, India
| | - Sandeep Kaur
- Smart Nanomaterials and Sensor Laboratory, Centre for Nanoscience and Nanotechnology, UIEAST, Panjab University, Chandigarh, 160014, India
| | - Sajjad Hussain
- Smart Nanomaterials and Sensor Laboratory, Centre for Nanoscience and Nanotechnology, UIEAST, Panjab University, Chandigarh, 160014, India
| | - Jae Young Park
- Heat & Surface Technology R&D Department, Korea Institute of Industrial Technology, Incheon, 21999, Republic of Korea
| | - Vibhav Katoch
- Smart Nanomaterials and Sensor Laboratory, Centre for Nanoscience and Nanotechnology, UIEAST, Panjab University, Chandigarh, 160014, India; Microfluidics Research Laboratory, Institute of Nano Science and Technology, Sahibzada Ajit Singh Nagar, Punjab, 140306, India
| | - Bhanu Parkash
- Microfluidics Research Laboratory, Institute of Nano Science and Technology, Sahibzada Ajit Singh Nagar, Punjab, 140306, India
| | - Akash Katoch
- Smart Nanomaterials and Sensor Laboratory, Centre for Nanoscience and Nanotechnology, UIEAST, Panjab University, Chandigarh, 160014, India.
| | - Deepika Jamwal
- Department Chemistry, University Institute of Sciences, Chandigarh University, Gharuan, Punjab, 140413, India; Sophisticated Analytical Instrumentation Facility (SAIF), Panjab University, Chandigarh, 160014, India.
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Halder P, Mondal I, Mukherjee A, Biswas S, Sau S, Mitra S, Paul BK, Mondal D, Chattopadhyay B, Das S. Te 4+ and Er 3+ doped ZrO 2 nanoparticles with enhanced photocatalytic, antibacterial activity and dielectric properties: A next generation of multifunctional material. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 359:120985. [PMID: 38677226 DOI: 10.1016/j.jenvman.2024.120985] [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: 01/27/2024] [Revised: 04/03/2024] [Accepted: 04/20/2024] [Indexed: 04/29/2024]
Abstract
Amid rising water contamination from industrial sources, tackling toxic dyes and pathogens is critical. Photocatalysis offers a cost-effective and eco-friendly solution to this pressing challenges. Herein, we synthesized Te4+ and Er3+ doped ZrO2 photocatalysts through hydrothermal method and investigated their efficacy in degrading Congo red (CR) and pathogens under visible light. XRD and Raman Spectroscopy confirm monoclinic and tetragonal mixed-phases without any impurities. Doping-induced defects, reduced crystalline diameter, high surface area, modified bandgap (2.95 eV), photoluminescence quenching, coupled with interfacial polarization, contribute to EZO's excellent dielectric response (1.149 × 106), for achieving remarkable photocatalytic activity, verified by photoelectrochemical measurements, LC-MS and phytotoxicity analysis. Under optimal conditions, EZO achieves 99% CR degradation within 100 min (TOC 79.9%), surpassing ZO (77%) and TZO (84%). Catalyst dosages, dye concentrations, and solution pH effect on EZO's photocatalytic performance are systematically assessed. Scavenging experiment emphasized the pivotal role of · OH in CR degradation with 96.4% efficiency after 4 cycles, affirming its remarkable stability. Moreover, EZO demonstrates ROS-mediated antibacterial activity against E. faecalis and E. coli bacteria under visible light, achieving >97% and >94% inhibition rate with an inhibition zone > 3 mm. Hence, the nanoparticle's dual action offers a practical solution for treating contaminated wastewater, ensuring safe irrigation.
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Affiliation(s)
- Piyali Halder
- Department of Physics, Jadavpur University, Kolkata, 700032, India
| | - Indrajit Mondal
- Department of Physics, Jadavpur University, Kolkata, 700032, India
| | | | - Somen Biswas
- Department of Physics, Jadavpur University, Kolkata, 700032, India; Department of Physics, Bangabasi College, Kolkata, 700009, India
| | - Souvik Sau
- Department of Physics, Jadavpur University, Kolkata, 700032, India; Department of Physics, Bangabasi College, Kolkata, 700009, India
| | - Sucheta Mitra
- Department of Physics, Jadavpur University, Kolkata, 700032, India
| | | | - Dheeraj Mondal
- Department of Physics, Nabagram Hiralal Paul College, Hooghly, 712246, India
| | | | - Sukhen Das
- Department of Physics, Jadavpur University, Kolkata, 700032, India.
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Dubey S, Mishra RK, Kaya S, Rene ER, Giri BS, Sharma YC. Microalgae derived honeycomb structured mesoporous diatom biosilica for adsorption of malachite green: Process optimization and modeling. CHEMOSPHERE 2024; 355:141696. [PMID: 38499077 DOI: 10.1016/j.chemosphere.2024.141696] [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: 06/20/2023] [Revised: 02/29/2024] [Accepted: 03/11/2024] [Indexed: 03/20/2024]
Abstract
The present study investigated the removal of malachite green dye from aquifers by means of microalgae-derived mesoporous diatom biosilica. The various process variables (dye concentration, pH, and adsorbent dose) influencing the removal of the dye were optimized and their interactive effects on the removal efficiency were explored by response surface methodology. The pH of the solution (pH = 5.26) was found to be the most dominating among other tested variables. The Langmuir isotherm (R2 = 0.995) best fitted the equilibrium adsorption data with an adsorption capacity of 40.7 mg/g at 323 K and pseudo-second-order model (R2 = 0.983) best elucidated the rate of dye removal (10.6 mg/g). The underlying mechanism of adsorption was investigated by Weber-Morris and Boyd models and results revealed that the film diffusion governed the overall adsorption process. The theoretical investigations on the dye structure using DFT-based chemical reactivity descriptors indicated that malachite green cations are electrophilic, reactive and possess the ability to accept electrons, and are strongly adsorbed on the surface of diatom biosilica. Also, the Fukui function analysis proposed the favorable adsorption sites available on the adsorbent surface.
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Affiliation(s)
- Shikha Dubey
- Department of Chemistry, School of Sciences, Hemvati Nandan Bahuguna Garhwal University, Srinagar (Garhwal) 246174, India; Department of Chemistry, Indian Institute of Technology (Banaras Hindu University), Varanasi, Uttar Pradesh 221005, India.
| | - Rakesh K Mishra
- Department of Chemistry, National Institute of Technology, Uttarakhand (NITUK), Srinagar (Garhwal) 246174, India
| | - Savaş Kaya
- Department of Pharmacy, Health Services Vocational School, Sivas Cumhuriyet University, Sivas 58140, Turkey
| | - Eldon R Rene
- Department of Water Supply, Sanitation and Environmental Engineering, IHE Delft Institute for Water Education, Westvest 7, Delft 2601DA, the Netherlands
| | - Balendu Shekher Giri
- Sustainability Cluster, University of Petroleum and Energy Studies (UPES), Dehradun, Uttarakhand 248007, India
| | - Yogesh C Sharma
- Department of Chemistry, Indian Institute of Technology (Banaras Hindu University), Varanasi, Uttar Pradesh 221005, India
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Subramani K, Incharoensakdi A. Physicochemical and photocatalytic properties of biogenic ZnO and its chitosan nanocomposites for UV-protection and antibacterial activity on coated textiles. Int J Biol Macromol 2024; 263:130391. [PMID: 38417746 DOI: 10.1016/j.ijbiomac.2024.130391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 02/19/2024] [Accepted: 02/21/2024] [Indexed: 03/01/2024]
Abstract
The textiles for medical use and the purification of textile factory effluents have become the most crucial part of the human healthcare sector. In this study bioactive compounds produced by four distinct plant extracts were used for the synthesis of zinc oxide nanoparticles. The four different ZnO nanoparticles were comprehensively characterized by different analytical techniques. XRD analysis revealed the crystalline nature and phase purity of the ZnO nanoparticles. FTIR spectra provided information on the function of plant extracts in the stabilization or capping process. The size distribution and morphological diversity of the nanoparticles were further clarified by SEM and TEM images. The photocatalytic degradation activity of the four ZnO nanoparticles on two different dyes showed that ZnO nanoparticles prepared from A. indica were most effective for the degradation of 98 % and 91 % of Rhodamine B and Alizarin red dye respectively. The selected ZnO nanoparticles from A. indica were used to prepare ZnO-chitosan nanocomposites before coating on cotton fabrics. The hydrophobicity, UV protection factor, and antibacterial activity of ZnO-chitosan nanocomposites, when coated on cotton fabrics, were also examined. The overall results demonstrated the ZnO and ZnO-chitosan nanocomposite prepared in the present study as a promising material for environmental remediation application.
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Affiliation(s)
- Karthik Subramani
- Laboratory of Cyanobacterial Biotechnology, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Aran Incharoensakdi
- Laboratory of Cyanobacterial Biotechnology, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; Academy of Science, Royal Society of Thailand, Bangkok 10300, Thailand.
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Zhang Y, Cheng W, Di H, Yang S, Tian Y, Tong Y, Huang H, Escalona VH, Tang Y, Li H, Zhang F, Sun B, Huang Z. Variation in Nutritional Components and Antioxidant Capacity of Different Cultivars and Organs of Basella alba. PLANTS (BASEL, SWITZERLAND) 2024; 13:892. [PMID: 38592915 PMCID: PMC10974134 DOI: 10.3390/plants13060892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 03/16/2024] [Accepted: 03/17/2024] [Indexed: 04/11/2024]
Abstract
Basella alba is a frequently consumed leafy vegetable. However, research on its nutritional components is limited. This study aimed to explore the variation in the nutritional components and antioxidant capacity of different cultivars and organs of Basella alba. Here, we primarily chose classical spectrophotometry and high-performance liquid chromatography (HPLC) to characterize the variation in nutritional components and antioxidant capacity among different organs (inflorescences, green fruits, black fruits, leaves, and stems) of eight typical cultivars of Basella alba. The determination indices (and methods) included the total soluble sugar (anthrone colorimetry), total soluble protein (the Bradford method), total chlorophyll (the ethanol-extracting method), total carotenoids (the ethanol-extracting method), total ascorbic acid (the HPLC method), total proanthocyanidins (the p-dimethylaminocinnamaldehyde method), total flavonoids (AlCl3 colorimetry), total phenolics (the Folin method), and antioxidant capacity (the FRAP and ABTS methods). The results indicated that M5 and M6 exhibited advantages in their nutrient contents and antioxidant capacities. Additionally, the inflorescences demonstrated the highest total ascorbic acid and total phenolic contents, while the green and black fruits exhibited relatively high levels of total proanthocyanidins and antioxidant capacity. In a comparison between the green and black fruits, the green fruits showed higher levels of total chlorophyll (0.77-1.85 mg g-1 DW), total proanthocyanidins (0.62-2.34 mg g-1 DW), total phenolics (15.28-27.35 mg g-1 DW), and ABTS (43.39-59.16%), while the black fruits exhibited higher levels of total soluble protein (65.45-89.48 mg g-1 DW) and total soluble sugar (56.40-207.62 mg g-1 DW) in most cultivars. Chlorophyll, carotenoids, and flavonoids were predominantly found in the leaves of most cultivars, whereas the total soluble sugar contents were highest in the stems of most cultivars. Overall, our findings underscore the significant influence of the cultivars on the nutritional composition of Basella alba. Moreover, we observed notable variations in the nutrient contents among the different organs of the eight cultivars, and proanthocyanidins may contribute significantly to the antioxidant activity of the fruits. On the whole, this study provides a theoretical basis for the genetic breeding of Basella alba and dietary nutrition and serves as a reference for the comprehensive utilization of this vegetable.
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Affiliation(s)
- Yi Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (Y.Z.); (H.D.); (S.Y.); (Y.T.); (Y.T.); (H.H.); (Y.T.); (H.L.); (F.Z.)
| | - Wenjuan Cheng
- Institute of Agricultural Resources and Environment, Tianjin Academy of Agricultural Sciences, Tianjin 300384, China;
- The State Key Laboratory of Vegetable Biobreeding, Tianjin Academy of Agriculture Sciences, Tianjin 300192, China
| | - Hongmei Di
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (Y.Z.); (H.D.); (S.Y.); (Y.T.); (Y.T.); (H.H.); (Y.T.); (H.L.); (F.Z.)
| | - Shihan Yang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (Y.Z.); (H.D.); (S.Y.); (Y.T.); (Y.T.); (H.H.); (Y.T.); (H.L.); (F.Z.)
| | - Yuxiao Tian
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (Y.Z.); (H.D.); (S.Y.); (Y.T.); (Y.T.); (H.H.); (Y.T.); (H.L.); (F.Z.)
| | - Yuantao Tong
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (Y.Z.); (H.D.); (S.Y.); (Y.T.); (Y.T.); (H.H.); (Y.T.); (H.L.); (F.Z.)
| | - Huanhuan Huang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (Y.Z.); (H.D.); (S.Y.); (Y.T.); (Y.T.); (H.H.); (Y.T.); (H.L.); (F.Z.)
| | - Victor Hugo Escalona
- Faculty of Agricultural Sciences, University of Chile, Santa Rosa 11315, Santiago 8820808, Metropolitan Region, Chile;
| | - Yi Tang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (Y.Z.); (H.D.); (S.Y.); (Y.T.); (Y.T.); (H.H.); (Y.T.); (H.L.); (F.Z.)
| | - Huanxiu Li
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (Y.Z.); (H.D.); (S.Y.); (Y.T.); (Y.T.); (H.H.); (Y.T.); (H.L.); (F.Z.)
| | - Fen Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (Y.Z.); (H.D.); (S.Y.); (Y.T.); (Y.T.); (H.H.); (Y.T.); (H.L.); (F.Z.)
| | - Bo Sun
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (Y.Z.); (H.D.); (S.Y.); (Y.T.); (Y.T.); (H.H.); (Y.T.); (H.L.); (F.Z.)
| | - Zhi Huang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (Y.Z.); (H.D.); (S.Y.); (Y.T.); (Y.T.); (H.H.); (Y.T.); (H.L.); (F.Z.)
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