Design and Fabrication of Highly Photoluminescent Carbon-Incorporated Silica from Rice Husk Biomass

Wang, Zhaofeng; Zeng, Songshan; Joshi, Gayatri; Smith, Andrew T.; Zeng, Huidan; Wei, Zichao; Yu, Xiaoyuan; Pokhrel, Madhab; Mao, Yuanbing; Wang, Weixing; Sun, Luyi

doi:10.1021/acs.iecr.9b00151

Cited by 8 publications

(3 citation statements)

References 36 publications

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“…RHs are often treated as a biowaste, converting RHs biowaste into value-added products with broad applications remains a considerable challenge as well as a significant task 33 , 34 . In this work, we take advantage of the intimate contact of C and silica in RHs to design and fabricate CDs@SiO 2 network with ultralong RTP lifetime, remarkable quantum efficiency, and extraordinary stability through an in situ method.…”

Section: Resultsmentioning

confidence: 99%

Ultralong lifetime and efficient room temperature phosphorescent carbon dots through multi-confinement structure design

et al. 2020

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Room temperature phosphorescence materials have inspired extensive attention owing to their great potential in optical applications. However, it is hard to achieve a room temperature phosphorescence material with simultaneous long lifetime and high phosphorescence quantum efficiency. Herein, multi-confined carbon dots were designed and fabricated, enabling room temperature phosphorescence material with simultaneous ultralong lifetime, high phosphorescence quantum efficiency, and excellent stability. The multi-confinement by a highly rigid network, stable covalent bonding, and 3D spatial restriction efficiently rigidified the triplet excited states of carbon dots from non-radiative deactivation. The as-designed multi-confined carbon dots exhibit ultralong lifetime of 5.72 s, phosphorescence quantum efficiency of 26.36%, and exceptional stability against strong oxidants, acids and bases, as well as polar solvents. This work provides design principles and a universal strategy to construct metal-free room temperature phosphorescence materials with ultralong lifetime, high phosphorescence quantum efficiency, and high stability for promising applications, especially under harsh conditions.

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Section: Resultsmentioning

confidence: 99%

Ultralong lifetime and efficient room temperature phosphorescent carbon dots through multi-confinement structure design

et al. 2020

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“…[ 16 ] RHs are usually regarded as biowaste, and the silica extracted from RHs is non‐toxic than commercial crystalline and amorphous spherical silica. [ 17 ] At the same time, it has better compatibility with CDs and is an ideal matrix for protecting the excited triplet state of CDs. [ 18 ] Last but not least, a relatively higher temperature calcination process is necessary, which was believed to help produce a more compact silica network, protecting triplet excitons to produce long‐lived RTP.…”

Section: Resultsmentioning

confidence: 99%

Dynamic Room Temperature Phosphorescence of Silane‐Functionalized Carbon Dots Confining within Silica for Anti‐Counterfeiting Applications

Chen,

Tan,

Liang

et al. 2023

Small

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Room temperature phosphorescent (RTP) materials with long‐lived, excitation‐dependent, and time‐dependent phosphorescence are highly desirable but very hard to achieve. Herein, this work reports a rational strategy of multiple wavelength excitation and time‐dependent dynamic RTP color by confining silane‐functionalized carbon dots (CDs) in a silica matrix (Si‐CDs@SiO2). The Si‐CDs@SiO2 possesses unique green‐light‐excitation and a change in phosphorescence color from yellow to green. A slow‐decaying phosphorescence at 500 nm with a lifetime of 1.28 s and a fast‐decaying phosphorescence at 580 nm with a lifetime of 0.90 s are observed under 365 nm of irradiation, which originated from multiple surface triplet states of the Si‐CDs@SiO2. Given the unique dynamic RTP properties, the Si‐CDs@SiO2 are demonstrated for applications in fingerprint recognition and multidimensional dynamic information encryption. These findings will open an avenue to explore dynamic phosphorescent materials and significantly broaden their applications.

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“…In recent studies, researchers have attempted to fabricate silica for specific applications during the extraction process itself. Wang et al produced highly photoluminescent carbonincorporated silica via two-step calcination at 600 • C using acid-treated RH powder [143]. Carbon-incorporated silica has been reported as a promising material for optical, photonic, and biomedical applications because of its non-toxicity and presence of chemically bonded carbon (0.44 wt%).…”

Section: Extraction Of Silica and Nanocellulose From Biomassmentioning

confidence: 99%

A Review of Biomass-Derived UV-Shielding Materials for Bio-Composites

Kim¹,

Park

Lee

et al. 2023

Energies

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The adverse effects of UV (ultraviolet) radiation on polymeric materials and organic constituents can damage the molecular structure of human skin and polymeric materials, resulting in their degradation. Therefore, additives or reagents for UV-shielding must be used in related applications, including polymer compounds and skin cosmetics. Bio-based polymers have shown great potential as alternatives to conventional metallic and organic materials (e.g., TiO2 and ZnO) in various applications; therefore, natural products have gained attention as a potential resource to overcome UV-induced health and environmental problems. In particular, biomass-derived materials such as lignin, fiber, and silica have been investigated as UV-shielding materials owing to their biocompatibility, biodegradability, and low carbon emissions. In this review, the UV-shielding effect and potential of various biomass-derived materials, such as silica, nanocellulose, and fibers, are reviewed. Among them, lignin is considered a promising UV-shielding material because of the presence of chromophores and functional groups capable of absorbing UV radiation of all ranges.

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Design and Fabrication of Highly Photoluminescent Carbon-Incorporated Silica from Rice Husk Biomass

Cited by 8 publications

References 36 publications

Ultralong lifetime and efficient room temperature phosphorescent carbon dots through multi-confinement structure design

Ultralong lifetime and efficient room temperature phosphorescent carbon dots through multi-confinement structure design

Dynamic Room Temperature Phosphorescence of Silane‐Functionalized Carbon Dots Confining within Silica for Anti‐Counterfeiting Applications

A Review of Biomass-Derived UV-Shielding Materials for Bio-Composites

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