Three-dimensional ZnO–TiO2/graphene aerogel for water remediation: The screening studies of adsorption and photodegradation

Buu, Ton That; Son, Vo Hoai; Nam, Nguyen Thanh; Hải, Nguyễn Duy; Thanh, Vuong Hoai; Quang, Le Tran Ky; Dat, Nguyen Minh; Lin, Tong Hoang; Phong, Mai Thanh; Hieu, Nguyen Huu

doi:10.1016/j.ceramint.2022.11.162

Cited by 26 publications

(10 citation statements)

References 43 publications

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“…[20] Indubitably, the presence of C=O stretching at 1726 cm À 1 possesses an insignificant intensity, confirming a significant reduction of GO as well as the removal of a large amount of oxygen-containing functional groups. [21] Besides, absorption peaks at 1574 cm À 1 and 1170 cm À 1 can be ascribed to NÀ H and CÀ N groups in the GA network, which affirms the interaction of the amine groups of EDA with GO, which not only acts as a reducing agent but also a crosslinker for the assembly of graphene sheets. [22,23] Meanwhile, in the spectrum of the ATG3 composite, wide absorption signals below 1000 cm À 1 also experienced a variation as compared to ⋅GA, which can be attributed to the presence of TiÀ OÀ Ti and TiÀ OÀ C vibrations upon the interaction between TiO 2 and graphene sheets.…”

Section: Characterization Of Materialsmentioning

confidence: 63%

“…[16] Regarding the ATG3 composite, several distinct signals can be observed at 25.2, 37.8, 44.1, 47.9, 53.8, 54.9, 62.6, 68.9, 70.3, and 75.0°, which can be attributed to the appearance of the (101), ( 004), ( 200), ( 105), ( 221), ( 204), ( 116), (220), and (215) planes of the anatase phase of TiO 2 , respectively (JCPDS-21 À 1 272). It is also noteworthy that no signal for GA can be witnessed in the figure for ATG3, which can be explained that the strong intensity of the (101) peak of anatase TiO 2 has overwhelmed the signals of GA. [20,21]. Additionally, the presence of Ag can be also identified via the diffraction peaks at 64.3 and 77.3 °, which are assigned to the characteristic planes of ( 200) and (311), respectively.…”

Section: Characterization Of Materialsmentioning

confidence: 99%

“…[25] Furthermore, the generation of a new valence band of TiÀ OÀ C bonds via the hybridization of C2p and O2p atomic orbits of the graphene structure also causes a decrease in the bandgap of the material. [21] Moreover, the morphological structure of the ATG3 was also assessed via SEM images. According to Figure 3(a-c), the interconnected graphene network of the ATG3 sample exhibited a corrugated surface with several micropores.…”

Section: Chemistryselectmentioning

confidence: 99%

“…the absorption peak at around 1600 cm À 1 of GA was also slightly modified after embedding TiO 2 and Ag. This phenomenon can be related to the presence of TiÀ OÀ Ti stretching vibration that overlapped the signals of GA. [21] The crystallinity structure of the ATG3 material was evaluated via Raman spectra, as demonstrated in Figure 2c. According to the results, two prominent signals are located at approximately 1600 and 1330 cm À 1 , corresponding to the G and D bands, respectively.…”

Section: Chemistryselectmentioning

confidence: 99%

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Synthesis of Ag−/Graphene Aerogel Composite for Removal of Methyl Orange

Xuan Trinh,

Mong Thy,

That Buu

et al. 2023

ChemistrySelect

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In this study, silver-titanium dioxide/graphene aerogel (AgÀ TiO 2 /GAÀ ATG) was synthesized via chemical reduction using ethylene diamine (EDA). The effects of reductant doses on the formation of the three-dimensional structure and the photocatalytic degradation efficiency of ATG were evaluated with five different volumes (20, 30, 40, 50, and 60 μL), corresponding to the ATG1, ATG2, ATG3, and ATG4, respectively. The results showed that 40 μL of EDA was the suitable condition for the formation of ATG three-dimensional structure. Characterizations revealed that ATG3 was successfully synthesized with distinctive peaks of Ag and TiO 2 in the X-ray diffraction patterns whilst scanning electron microscope and high resolution transmission electron microscope images showed a porous structure, silver nanoparticles and TiO 2 with an average size of 10-25 nm were uniformly distributed on the graphene surface. Furthermore, ATG3 possessed the highest photocatalytic capability to deteriorate methyl orange with an efficiency of up to 99.53 % with a catalyst dose of 0.3 mg/mL, superior compared to those of TiO 2 and TiO 2 /GA. The radicals scavenging experiments elucidated * O 2 to majorly contribute to the photodegradation process. Moreover, ATG3 showed high recyclability, which retains 80 % of yield even after 10 cycles. Those findings proved that ATG has high potential in the environmental remediation field.

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Section: Characterization Of Materialsmentioning

confidence: 63%

Section: Characterization Of Materialsmentioning

confidence: 99%

Section: Chemistryselectmentioning

confidence: 99%

Section: Chemistryselectmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis of Ag−/Graphene Aerogel Composite for Removal of Methyl Orange

Xuan Trinh,

Mong Thy,

That Buu

et al. 2023

ChemistrySelect

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“…The electrochemical performance of the electrodes TG-CA700, TG-CA800, and TG-CA900 in phosphate buffer (pH 7) was recorded between −1.0 and 1.0 V with three-electrode system. As shown in Figure 10a, all samples at 100 mV/S possess a rectangular curve, indicating that the low resistance exists in the material structure and the high ionic sensitivity of the TG-CA materials [31]. The effect of scan rate on the recorded CyV curve of the TG-CA800 was additionally evaluated at 10, 20, 50, 100, and 150 mV/s (Figure 10b), where the figures were significantly maintained in a parallelogram, elucidating the superiority of the electrochemical double-layer behavior over pseudo-capacitance [32].…”

Section: Electrochemical Propertiesmentioning

confidence: 97%

Tea grounds inspiration for a renewable biomass-based carbon aerogel with CMC and PVA reinforcements: Dye adsorption and supercapacitor prospects

Buu

Cong

et al. 2023

Preprint

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In this study, tea grounds-carbon aerogel (TG-CA) was successfully synthesized and applied effectively in organic dye adsorption and supercapacitor applications. Interestingly, the prepared material has unique properties due to the synthesis process with the combination of carboxymethyl cellulose and poly(vinyl alcohol), which can improve the mechanical properties, strengthen the three-dimensional structure, and increase the specific surface area. Besides, the fabricated carbon aerogel also demonstrated excellent adsorption capacity for rhodamine B (RhB), crystal violet (CV), and methyl orange (MO) of 158.4, 143.2, and 132.9 mg/g for 2 h, respectively. Wherein, the adsorption efficiency of RhB dye was evaluated according to the pseudo-second-order kinetic (PSO) and the Langmuir isotherm model with R2 = 0.9947. Besides, the thermodynamic investigation of RhB adsorption using TG-CA800 reveals that the process is endothermic and the negative values of Gibb's free energy (ΔG°) demonstrate that the process was spontaneous. Regarding the electrochemical properties, the tea grounds-carbon prepared at 800oC (TG-CA800) indicated the highest specific capacitance of 291 F/g at the current density of 10 A/g with the potential window of −1.0 to 0 V in phosphate buffer (pH 7). Additionally, the great stability of the material was also confirmed with high capacitance retention of 97.53% after 500 cycles. These results suggest that the carbon aerogel materials prepared from green precursor sources, particularly tea grounds, could be considered a potential and promising approach to tackle organic dye elimination and supercapacitor applications.

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Shining Light on Carbon Aerogel Photocatalysts: Unlocking the Potentials in the Quest for Revolutionizing Solar‐to‐Chemical Conversion and Environmental Remediation

Wong,

Foo,

Siang

et al. 2023

Adv Funct Materials

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The past few years have witnessed a surge of interest in the development of carbon aerogel‐based photocatalysts, stemming from their fascinating characteristics that encompass the inherent properties of 2D carbon‐based nanomaterials and unique 3D structural features. Benefitting from their auspicious physicochemical characteristics, including low density, abundant active sites, and remarkable electrical conductivity, carbon aerogels have emerged as promising candidates for photocatalysis in energy and environmental applications. Thus, this review presents a panorama of state‐of‐the‐art advancements underlying the synthesis and modifications of carbon aerogel‐based nanocomposites for enhanced performance in photocatalytic applications. The synthetic strategies followed by the unique roles of carbon aerogel are highlighted to decipher the auspicious roles of carbon aerogels in bolstering photocatalytic activity. Additionally, the fundamental mechanism behind carbon aerogel‐based photocatalysts as well as their modifications are thoroughly discussed. Thereafter, the works on the photocatalytic applications of carbon aerogel in solar‐driven hydrogen evolution, CO2 reduction, pollutant decontamination, and bacteria inactivation, in the past 5 years are summarized with insights into charge dynamics being unveiled. Lastly, this review will prospect the ongoing challenges and future outlook of carbon aerogel‐based heterostructures in photocatalysis, aiming to facilitate the development of carbon aerogel‐based photocatalysts at the forefront of this research.

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Three-dimensional ZnO–TiO2/graphene aerogel for water remediation: The screening studies of adsorption and photodegradation

Cited by 26 publications

References 43 publications

Synthesis of Ag−/Graphene Aerogel Composite for Removal of Methyl Orange

Synthesis of Ag−/Graphene Aerogel Composite for Removal of Methyl Orange

Tea grounds inspiration for a renewable biomass-based carbon aerogel with CMC and PVA reinforcements: Dye adsorption and supercapacitor prospects

Shining Light on Carbon Aerogel Photocatalysts: Unlocking the Potentials in the Quest for Revolutionizing Solar‐to‐Chemical Conversion and Environmental Remediation

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