Enhanced Luminescence of BPO4 by Mixing with SiO2 and Al2O3

Zhang, Cuimiao; Lin, Cuikun; Li, Chunxia; Quan, Zewei; Liu, Xiaoming; Lin, Jun

doi:10.1021/jp710046x

Cited by 37 publications

(30 citation statements)

References 58 publications

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“…Previously the existence of CO 2 .− radicals in the interstitial sites of the aragonite lattice of SrCO 3 has been proposed for the EPR bands and self‐activated luminescence . The defect centers induce an electron which is localized in the 2p orbital of the single bonded carbon, giving rise to photoluminescence through a strong electron‐photon coupling . Likewise, the CO 2 .− radicals in the apatite lattice, possibly due to the citrate introduced in the process, are acknowledged to this EPR effects .…”

Section: Resultsmentioning

confidence: 98%

Novel Hybrid Nanorod Carriers of Fluorescent Hydroxyapatite Shelled with Mesoporous Silica Effective for Drug Delivery and Cell Imaging

et al. 2014

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Development of biocompatible multifunctional nanocarriers is necessary for the success of theranostics. Here, we report a novel hybrid nanorod with self-fluorescent property, high drug loading capacity, and good biocompatibility. Fluorescent hydroxyapatite (fHA) nanorod was ensheathed with mesoporous silica (mSi). The mSi shell was uniformly layered and was tunable in thickness (10-30 nm) over the fHA nanorod. Highly mesoporous structure of mSi shell facilitated the loading of a large quantity of biological molecules, as confirmed with fluorescein isothiocynate;~1% loading for fHA increased to~10% loading for fHA@mSi. The self-fluorescent property of the fHA resulting from CO 2 . -radicals was well preserved in the fHA@mSi hybrid, as analyzed by photoluminescence and electron paramagnetic resonance property. Cellular toxicity of the fHA@mSi hybrid nanorod showed favorable cell viability (>90% viability of control) up to a concentration of~40 lg/mL. Intracellular uptake rate of the hybrid nanorod was as high as 80-90%, as analyzed by fluorescent-assisted cell sorter. Results demonstrate the newly developed fHA@mSi nanocarriers have great potential for the effective loading of therapeutic molecules and delivery within intracellular compartments in concert with a capacity for in situ imaging.

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Section: Resultsmentioning

confidence: 98%

Novel Hybrid Nanorod Carriers of Fluorescent Hydroxyapatite Shelled with Mesoporous Silica Effective for Drug Delivery and Cell Imaging

et al. 2014

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“…The PL of the Ti 3 C 2 OH QDs suspension should be mainly originated from the increased defects in vacancies and surface defects, [ 9,39,40 ] which can capture carriers in the nanomaterials to produce PL through a strong electron‐photon coupling. [ 41,42 ] Accordingly, to confirm the more abundant defects in the Ti 3 C 2 OH QDs, PL measurement was carried out for the Ti 3 C 2 T x MXene and Ti 3 C 2 OH QDs powders, respectively (Figure S8, Supporting Information). It can be observed that the PL intensity of the Ti 3 C 2 OH QDs powder is significantly higher than that of Ti 3 C 2 T x MXene, indicating the sharp defects increase in the Ti 3 C 2 OH QDs, which also consistent with the results of the Raman spectrum as mentioned above.…”

Section: Figurementioning

confidence: 99%

Rational Design of Hydroxyl‐Rich Ti₃C₂T_x MXene Quantum Dots for High‐Performance Electrochemical N₂ Reduction

Jin

Liu

et al. 2020

Advanced Energy Materials

168

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Ammonia (NH 3 ) is essential to human life due to its vital roles in fuel production, agricultural cultivation and industrial manufacture. [1,2] The abundant nitrogen (N 2 ) in the earth's atmosphere is the main raw material for the synthesis of NH 3 , [3] but the large bond energy (940.95 kJ mol −1 ) of NN bond [1,4] makes N 2 reduction reaction (NRR) extremely difficult. [5] At present, the traditionally industrial NH 3 synthesis strongly relies on the Haber-Bosch process, which has to be conducted at high pressures at 200-300 atm and high temperature of ≈500 °C. [6] Furthermore, such production method is energy-intensive that consumes 1-3% of the global energy annually and emit tons of CO 2 correspondingly. [7] Over the last decades, electrochemical NRR has attracted global attention due to its renewable raw materials of N 2 and water as well as ambient synthesis condition. [8] With recent booming development, the study of NRR electrocatalysts has moved from precious metals to cheap and abundant transition metal oxides and metal-free materials, etc. [9] However, due to the lack of rational and target-specific design of the NRR electrocatalyst, it is still a difficult task to reach an ideal electrocatalyst fulfilling with the requirements of high NH 3 yield, excellent selectivity and cost-effectiveness simultaneously. To meet these requirements, it is expected that catalysts contain abundant active sites. [10] Under this context, various low-dimensional catalysts have been extensively investigated, such as 2D nanosheets and 0D quantum dots (QDs) due to their ultrahigh ratio of active sites and defects exposed on the surfaces.QDs, especially derived from 2D materials (2D-QDs), are often with small size of less than 10 nm, enhanced surface defects and large surface specific area, thus offering abundantactive basal and edge sites, together with various functional groups. [8,11,12] As a result, a large space has been generated for advanced rational design for N 2 adsorption and full reduction. [13,17] So far, however, the effect of edge sites and their functional groups on NRR performance of 2D-QDs is poorly known. MXene, an emerging typical 2D material, can be expressed by the chemical formula of M n+1 X n T x (n = 1, 2 and 3), [18,20] where M stands for the transition metal (e.g., Ti, Ta, Nb, V, Mo), the X represents the nitrogen or carbon or carbonitride, while T x represents a large number of surface functional groups (e.g., OH, F). [21,22] Due to the excellent conductivity and stability, To enable an efficient and cost-effective electrocatalytic N 2 reduction reaction (NRR) the development of an electrocatalyst with a high NH 3 yield and good selectivity is required. In this work, Ti 3 C 2 T x MXene-derived quantum dots (Ti 3 C 2 T x QDs) with abundant active sites enable the development of efficient NRR electrocatalysts. Given surface functional groups play a key role on the electrocatalytic performance, density functional theory calculations are first conducted, clarifying that hydroxyl groups on Ti 3 C 2...

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“…The defect centers induce an This journal is © The Royal Society of Chemistry 2014 electron being localized in the 2p orbital of the single bonded carbon, which gives rise to photoluminescence through a strong electron-photon coupling. 35 Using the fHAn developed herein, we sought to nd out their efficacy as delivery systems. The uorescent property of HA should allow in situ imaging and tracking of the delivery carrier during the intracellular uptake process or the cells aer transfection.…”

Section: àmentioning

confidence: 99%

Development of biocompatible apatite nanorod-based drug-delivery system with in situ fluorescence imaging capacity

et al. 2014

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Enhanced Luminescence of BPO₄ by Mixing with SiO₂ and Al₂O₃

Cited by 37 publications

References 58 publications

Novel Hybrid Nanorod Carriers of Fluorescent Hydroxyapatite Shelled with Mesoporous Silica Effective for Drug Delivery and Cell Imaging

Novel Hybrid Nanorod Carriers of Fluorescent Hydroxyapatite Shelled with Mesoporous Silica Effective for Drug Delivery and Cell Imaging

Rational Design of Hydroxyl‐Rich Ti₃C₂T_x MXene Quantum Dots for High‐Performance Electrochemical N₂ Reduction

Development of biocompatible apatite nanorod-based drug-delivery system with in situ fluorescence imaging capacity

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Enhanced Luminescence of BPO4 by Mixing with SiO2 and Al2O3

Cited by 37 publications

References 58 publications

Novel Hybrid Nanorod Carriers of Fluorescent Hydroxyapatite Shelled with Mesoporous Silica Effective for Drug Delivery and Cell Imaging

Novel Hybrid Nanorod Carriers of Fluorescent Hydroxyapatite Shelled with Mesoporous Silica Effective for Drug Delivery and Cell Imaging

Rational Design of Hydroxyl‐Rich Ti3C2Tx MXene Quantum Dots for High‐Performance Electrochemical N2 Reduction

Development of biocompatible apatite nanorod-based drug-delivery system with in situ fluorescence imaging capacity

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Enhanced Luminescence of BPO₄ by Mixing with SiO₂ and Al₂O₃

Rational Design of Hydroxyl‐Rich Ti₃C₂T_x MXene Quantum Dots for High‐Performance Electrochemical N₂ Reduction