Surface-rare-earth-rich upconversion nanoparticles induced by heterovalent cation exchange with superior loading capacity

Wang, Meifeng; Qin, Yiru; Shao, Wei; Cai, Zhiwang; Zhao, Xiaoyu; Hu, Yongjun; Zhang, Tao; Li, Sheng; Swihart, Mark T.; Yang, Lei; Wei, Wei

doi:10.1016/j.jmst.2021.04.053

Cited by 9 publications

(3 citation statements)

References 32 publications

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“…ZnAl 2 O 4 , as a spinel structure Al-based material, can expose abundant Al sites, becoming a potential catalyst for CF 4 decomposition. − Unfortunately, its CF 4 decomposition performance is still far from satisfaction because the Al III active sites are very limited. Surface modification has been developed as an important direction for surface site regulation. − For example, Yang et al reported that HNO 3 -modified YMn 2 O 5 increased unsaturated coordination Mn for benzene oxidation . Chu et al found that the acid treatment increased the unsaturated metal coordination of MOF-808(Ce) from 0 to 2.34 .…”

Section: Introductionmentioning

confidence: 99%

Promoted CF₄ Decomposition via Enhanced Tricoordinated Al Active Sites

Wang,

Zhang,

Chen

et al. 2024

ACS EST Eng.

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Tetrafluoromethane (CF 4 ), as a typical perfluorocarbon (PFC), has a remarkable global warming potential (GWP) of 7390 and an ultralong lifetime of 50 000 years, making its effective treatment crucial for mitigating environmental impact. Catalytic hydrolysis is a promising way for its effective decomposition, in which Al-based materials have been widely used as efficient catalysts. However, the deficiency of strong Lewis acidic-tricoordinated Al (Al III ) sites strongly limits their catalytic performance. In this work, efficient CF 4 decomposition was achieved via promoting Al III sites over ZnAl 2 O 4 through a facile acid treatment strategy. Among various acid treatments, it was found that H 2 SO 4 treated ZnAl 2 O 4 could achieve 100% CF 4 decomposition under a relatively low temperature of 600 °C and kept above 70% removal for over 160 h running. The 27 Al magic angle spinning nuclear magnetic resonance (MAS NMR) spectra demonstrated that the proportion of Al III was increased from ∼0% of the pristine one to 7.5% after H 2 SO 4 treatment. Pyridineinfrared (Py-IR) spectroscopy and NH 3 temperature-programmed desorption (NH 3 -TPD) and CF 4 -TPD tests indicated that the amount of acid sites and the adsorption capacity of CF 4 were dramatically improved after acid treatment. This work proposes a new strategy to improve CF 4 decomposition.

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Section: Introductionmentioning

confidence: 99%

Promoted CF₄ Decomposition via Enhanced Tricoordinated Al Active Sites

Wang,

Zhang,

Chen

et al. 2024

ACS EST Eng.

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“…There is a large and growing interest in the creation of metal–semiconductor hybrid nanomaterials because of their unique properties and applications including in photocatalysis, − optoelectronics, , and biological imaging/diagnostics. − To efficiently match structure with function, there has been sustained interest in establishing synthetic methods for precise control of their morphology. − A particularly successful approach for tuning these heterostructures has been postsynthetic modification of starting nanoparticle (NP) substrates. − There are several advantages to postsynthetic modification strategies for tuning nanoheterostructure morphology including the improved ability to tailor interfaces within the structure such as interface size, composition, number, and/or extent (e.g., gradient). Strategies such as cation/anion exchange and galvanic replacement have led to remarkably complex structures, ,,,− with both established and still studied new physical and chemical behaviors of interest. − …”

Section: Introductionmentioning

confidence: 99%

Influence of Surface Chemistry on Metal Deposition Outcomes in Copper Selenide-Based Nanoheterostructure Synthesis

Sen,

Millheim,

Gordon

et al. 2024

Langmuir

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The use of nanoparticle surface chemistry to direct metal deposition has been well-studied in the modification of metal nanoparticle substrates but is not yet well-established for metal chalcogenide particle substrates, although integration of these particles into nanoheterostructures is of high interest. In this report, we investigate the effect of Cu2–x Se surface chemistry on the morphology of metal deposition on these plasmonic semiconductor nanoparticles. Specifically, we functionalize Cu2–x Se nanoparticles with a suite of 12 different ligands and investigate how different aspects of the ligand structure do or do not impact the morphology and extent of subsequent metal deposition on the Cu2–x Se surface. Surprisingly, our results indicate that the morphology of the resulting metal deposits and the extent of metal deposition onto the existing Cu2–x Se particle substrate are indistinguishable for the majority of ligands tested. An exception to these findings is observed for particles functionalized by quaternary alkylammonium bromides, which exhibit statistically distinct metal deposition patterns compared to all other ligands tested. We hypothesize that this unique behavior is due to a cooperative binding mechanism of the quaternary alkylammonium bromides to the surface of copper selenide. Taken together, these results yield both new strategies for controlling postsynthetic modification of copper selenide nanoparticles and also reveal limitations of surface chemistry-based approaches for this system.

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“…A series of NaYF 4 :Pr NPs with different Pr 3+ contents were synthesized via a well-established co-precipitation method. 9 Transmission electron microscopy (TEM) images (Fig. 1a–e and Fig.…”

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confidence: 99%

Pr³⁺-doped nanoscintillators with concentration-quenching-free properties

Zhang

et al. 2023

Chem. Commun.

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Surface-rare-earth-rich upconversion nanoparticles induced by heterovalent cation exchange with superior loading capacity

Cited by 9 publications

References 32 publications

Promoted CF₄ Decomposition via Enhanced Tricoordinated Al Active Sites

Promoted CF₄ Decomposition via Enhanced Tricoordinated Al Active Sites

Influence of Surface Chemistry on Metal Deposition Outcomes in Copper Selenide-Based Nanoheterostructure Synthesis

Pr³⁺-doped nanoscintillators with concentration-quenching-free properties

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Surface-rare-earth-rich upconversion nanoparticles induced by heterovalent cation exchange with superior loading capacity

Cited by 9 publications

References 32 publications

Promoted CF4 Decomposition via Enhanced Tricoordinated Al Active Sites

Promoted CF4 Decomposition via Enhanced Tricoordinated Al Active Sites

Influence of Surface Chemistry on Metal Deposition Outcomes in Copper Selenide-Based Nanoheterostructure Synthesis

Pr3+-doped nanoscintillators with concentration-quenching-free properties

Contact Info

Product

Resources

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Promoted CF₄ Decomposition via Enhanced Tricoordinated Al Active Sites

Promoted CF₄ Decomposition via Enhanced Tricoordinated Al Active Sites

Pr³⁺-doped nanoscintillators with concentration-quenching-free properties