GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Royal Society of Chemistry (RSC)  (5)
  • 1
    Online Resource
    Online Resource
    One-pot hydrothermal preparation of capsule-like nanocomposites of C/Ce-co-doped ZnO supported on graphene to enhance photodegradation
    Royal Society of Chemistry (RSC) ; 2023
    In:  New Journal of Chemistry Vol. 47, No. 5 ( 2023), p. 2585-2596
    Details
    In: New Journal of Chemistry, Royal Society of Chemistry (RSC), Vol. 47, No. 5 ( 2023), p. 2585-2596
    Abstract: Capsule-like nanocomposites of C/Ce-co-doped ZnO (C/Ce–ZnO) deposited on graphene sheets (CCZG) were successfully synthesized by a one-pot hydrothermal method at 150 °C for 24 h to promote the photocatalytic degradation of methylene blue (MB) under visible light irradiation. The UV-vis spectra and photoluminescence spectra illustrated a band gap of 2.72 eV and a blue shift for CCZG as compared to ZnO or C/Ce–ZnO. The structural analysis confirmed the existence of interstitial sites on ZnO lattices due to the presence of dopants which directly narrowed the band gap of materials. To elucidate the photocatalytic performance, MB degradation experiments were performed under various conditions involving the graphene percentages in the as-prepared materials, the pH value of the reaction solutions, the initial MB concentration, and the irradiation sources. For every condition, CCZG exhibited a high degradation efficiency since most initial MB substances vanished after 60 to 90 min of light irradiation. In addition, a decrease of 6.45% in degradation efficiency after being recycled seven times indicated good durability and stability of CCZG. Furthermore, the degradation process, the charge transfer, and the roles of generated reactive reagents (electrons, holes, hydroxide, and peroxide radicals) were also proposed and discussed in detail.
    Type of Medium: Online Resource
    ISSN: 1144-0546 , 1369-9261
    URL: Article
    DOI: 10.1039/D2NJ04937F
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2023
    detail.hit.zdb_id: 1472933-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    A comparative study of 0D and 1D Ce-ZnO nanocatalysts in photocatalytic decomposition of organic pollutants
    Royal Society of Chemistry (RSC) ; 2021
    In:  RSC Advances Vol. 11, No. 57 ( 2021), p. 36078-36088
    Details
    In: RSC Advances, Royal Society of Chemistry (RSC), Vol. 11, No. 57 ( 2021), p. 36078-36088
    Abstract: Nanosized zinc oxide is an intriguing material that can be applied in various fields. In this study, Ce doped ZnO nano-catalysts (Ce-ZnO) were synthesized by two different methods ( i.e. , hydrothermal (Ce-ZnO-HT) and polymer gel combustion (Ce-ZnO-CB) methods) to compare their photodegradation efficiency. The prepared material characteristics were investigated using XRD, SEM, TEM, FTIR, UV-Vis, PL, XPS, EDS, and BET. The bandgap of both nanoparticles (NPs) was 2.95 eV, despite the fact that the morphology of Ce-ZnO-HT NPs was 1D-rod-shaped and that of Ce-ZnO-CB NPs was 0D-spherical. However, the surface area and oxygen vacancy rate of Ce-ZnO-HT NPs were higher than those of Ce-ZnO-CB NPs. These differences are directly related to the photocatalytic activity of Ce-ZnO NPs. Accordingly, the results showed that photocatalytic efficiency was classified in the order Ce-ZnO-HT 〉 Ce-ZnO-CB 〉 pure ZnO, and the photocatalytic reaction rate constant of Ce-ZnO-HT used to decompose MB was 3.0 times higher than that of Ce-ZnO-CB. Interestingly, the photodegradation mechanism study revealed that hydroxyl radicals and holes were shown to be more important contributors to methyl blue degradation than photo-induced electrons and superoxide radical ions.
    Type of Medium: Online Resource
    ISSN: 2046-2069
    URL: Article
    DOI: 10.1039/D1RA07493H
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2021
    detail.hit.zdb_id: 2623224-8
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    Recovery of tetrodotoxin from pufferfish viscera extract by amine-functionalized magnetic nanocomposites
    Royal Society of Chemistry (RSC) ; 2023
    In:  RSC Advances Vol. 13, No. 26 ( 2023), p. 18108-18121
    Details
    In: RSC Advances, Royal Society of Chemistry (RSC), Vol. 13, No. 26 ( 2023), p. 18108-18121
    Abstract: Tetrodotoxin (TTX) has been widely used in pharmacology, food poisoning analysis, therapeutic use, and neurobiology. In the last decades, the isolation and purification of TTX from natural sources ( e.g. , pufferfish) were mostly based on column chromatography. Recently, functional magnetic nanomaterials have been recognized as promising solid phases for the isolation and purification of bioactive compounds from aqueous matrices due to their effective adsorptive properties. Thus far, no studies have been reported on the utilization of magnetic nanomaterials for the purification of TTX from biological matrices. In this work, an effort has been made to synthesize Fe 3 O 4 @SiO 2 and Fe 3 O 4 @SiO 2 –NH 2 nanocomposites for the adsorption and recovery of TTX derivatives from a crude pufferfish viscera extract. The experimental data showed that Fe 3 O 4 @SiO 2 –NH 2 displayed a higher affinity toward TTX derivatives than Fe 3 O 4 @SiO 2 , achieving maximal adsorption yields for 4epi-TTX, TTX, and Anh-TTX of 97.9, 99.6, and 93.8%, respectively, under the optimal conditions of contact time of 50 min, pH of 2, adsorbent dosage of 4 g L −1 , initial adsorbate concentration of 1.92 mg L −1 4epi-TTX, 3.36 mg L −1 TTX and 1.44 mg L −1 Anh-TTX and temperature of 40 °C. Interestingly, desorption of 4epi-TTX, TTX, and Anh-TTX from Fe 3 O 4 @SiO 2 –NH 2 -TTX investigated at 50 °C was recorded to achieve the highest recovery yields of 96.5, 98.2, and 92.7% using 1% AA/ACN for 30 min reaction, respectively. Remarkably, Fe 3 O 4 @SiO 2 –NH 2 can be regenerated up to three cycles with adsorptive performance remaining at nearly 90%, demonstrating a promising adsorbent for purifying TTX derivatives from pufferfish viscera extract and a potential replacement for resins used in column chromatography-based techniques.
    Type of Medium: Online Resource
    ISSN: 2046-2069
    URL: Article
    DOI: 10.1039/D3RA02166A
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2023
    detail.hit.zdb_id: 2623224-8
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    Flexible, affordable and environmentally sustainable solar vapor generation based on ferric tannate/bacterial cellulose composite for efficient desalination solutions
    Royal Society of Chemistry (RSC) ; 2021
    In:  RSC Advances Vol. 11, No. 50 ( 2021), p. 31641-31649
    Details
    In: RSC Advances, Royal Society of Chemistry (RSC), Vol. 11, No. 50 ( 2021), p. 31641-31649
    Abstract: Desalination by solar steam generation (SSG) system is a green technology to produce pure water, which can address the issue of water scarcity. A novel photothermal material for the SSG system was fabricated by immersing bacterial cellulose (BC) sequentially into tannic acid (TA) and iron( iii ) (Fe 3+ ) solutions. Surface analysis of the resulting BC–TA–Fe 3+ (BTF) material showed that coordination nanocomplexes between Fe 3+ and hydroxyl groups of TA were formed on the surface of cellulose nanofibers. BTF material exhibited high sunlight absorption (∼95%), hydrophilic, self-cleaning properties, and excellent structural stability. SSG systems based on BTF had an evaporation efficiency of 91% and an evaporation rate of 1.56 kg m −2 h −1 under 1 sun illumination. Then, an efficient desalination device based on the larger-scale BTF material was fabricated to produce freshwater, the amount of freshwater per day was 5.6 kg m −2 on a sunny day. BTF material, thus, showed great potential in seawater desalination applications along with simple, versatile, scalable, and affordable fabrication methods.
    Type of Medium: Online Resource
    ISSN: 2046-2069
    URL: Article
    DOI: 10.1039/D1RA05558E
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2021
    detail.hit.zdb_id: 2623224-8
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    One-step hydrothermal preparation of Ta-doped ZnO nanorods for improving decolorization efficiency under visible light
    Royal Society of Chemistry (RSC) ; 2023
    In:  RSC Advances Vol. 13, No. 8 ( 2023), p. 5208-5218
    Details
    In: RSC Advances, Royal Society of Chemistry (RSC), Vol. 13, No. 8 ( 2023), p. 5208-5218
    Abstract: In this work, Ta-doped ZnO (Ta-ZnO) nanomaterials were synthesized by the hydrothermal method at different temperatures (110, 150, and 170 °C) for the photodegradation of methylene blue (MB) under visible light. Ta doping significantly affects the crystal defects, optical properties, and MB photocatalytic efficiency of ZnO materials. The optical absorption edge of Ta-ZnO 150 was redshifted compared to undoped ZnO, correlating to bandgap narrowing ( E gTa–ZnO = 2.92 eV; E gZnO = 3.07 eV), implying that Ta doped ZnO is capable of absorbing visible light. Besides, Ta-doping was the reason for enhanced blue light emission in the photoluminescence spectrum, which is related to the oxygen defect V 0O. It is also observed in the XPS spectra, where the percentage of oxygen in the oxygen-deficient regions (O 531.5 eV) of Ta-ZnO150 is higher than that of ZnO150. It is an important factor in enhancing ZnO's photocatalytic efficiency. The MB degradation efficiency of Ta-doped ZnO reached the highest for Ta-ZnO 150 and was 2.5 times higher than ZnO under a halogen lamp (HL). Notably, the influence of hydrothermal temperature on the structural, morphological, and photoelectrochemical properties was discussed in detail. As a result, the optimal hydrothermal temperature for synthesizing the nanorod is 150 °C. Furthermore, photocatalytic experiments were also performed under simulated sunlight and natural sunlight. The nature of the photo-oxidative degradation of MB was also investigated.
    Type of Medium: Online Resource
    ISSN: 2046-2069
    URL: Article
    DOI: 10.1039/D2RA07655A
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2023
    detail.hit.zdb_id: 2623224-8
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...