Tailoring the sp2/sp3 carbon composition for surface enhancement in Raman scattering

Li, Haining; Yang, Bing; Lu, Jun‐Sheng; Guo, Xiaokun; Yu, Biao; Xiong, Ying; Huang, Nan; Liu, Lusheng; Xu, Guangchen; Jiang, Xin

doi:10.1016/j.apsusc.2022.153966

Cited by 7 publications

(2 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Two characteristic Raman peaks corresponding to the D band and G band are observed near 1348 and 1589 cm –1 , respectively. The strength ratio of the D peak and G peak (designated as I D / I G ) can be used to determine the degree of structure defects in carbon materials. , For the Cu/PBCR-600 and Cu/BCR-600 catalysts, Cu/PBCR-600 possesses a larger value of I D / I G (0.99) than that of Cu/BCR (0.74). This could be due to the fact that P was introduced to the skeletons of PBCR-600 after the post-treatment H 3 PO 4 -activation procedure, which can be further confirmed by the following XPS characterization.…”

Section: Resultsmentioning

confidence: 99%

Cu-Based Catalysts Supported on H₃PO₄-Activated Coffee Biochar for Selective Reduction of Nitroaromatics

Gong,

Zhang,

et al. 2023

Langmuir

View full text Add to dashboard Cite

Selective reduction of nitroaromatics to the corresponding aromatic amines is extremely an attractive chemical process for both fundamental research and potential commercial applications. Herewith, we report that a highly dispersed Cu catalyst supported on H3PO4-activated coffee biochar and the resulting Cu/PBCR-600 catalyst show complete conversion of the nitroaromatics and >97.0% selectivity for the corresponding aromatic amines. The TOF of catalyzing the reduction of nitroaromatics (1.55–460.74 min–1) is approximately 2 to 15 times higher than those of previously reported non-noble and even noble metal catalysts. Additionally, Cu/PBCR-600 also shows high stability in catalytic recycles. Furthermore, it exhibits long-term catalytic stability (660 min) for practical application in a continuous-flow reactor. The characterizations and activity tests reveal that Cu0 existing in Cu/PBCR-600 acts as an active site in nitroaromatics reduction. Also, the further characterization by FTIR and UV–vis demonstrates that N, P co-doped coffee biochar could selectively adsorb and activate the nitro group of nitroaromatics.

show abstract

Section: Resultsmentioning

confidence: 99%

Cu-Based Catalysts Supported on H₃PO₄-Activated Coffee Biochar for Selective Reduction of Nitroaromatics

Gong,

Zhang,

et al. 2023

Langmuir

View full text Add to dashboard Cite

show abstract

“…Several researchers have investigated carbon-based materials with dual-phase or multi-level nanostructures and improved their mechanical or electrical properties 20,[23][24][25][26][27] . Furthermore, the combination of sp 2 -hybridized phases with diamond can significantly impacts the electrical conductivity, bandgap, and other characteristics of diamond-based materials 28,29 . This approach offers insights to the potential applications of diamond in the field of electronics.…”

mentioning

confidence: 99%

Diamond with Sp2-Sp3 composite phase for thermometry at Millikelvin temperatures

Yin,

Yan,

Miao

et al. 2024

Nat Commun

View full text Add to dashboard Cite

Temperature is one of the seven fundamental physical quantities. The ability to measure temperatures approaching absolute zero has driven numerous advances in low-temperature physics and quantum physics. Currently, millikelvin temperatures and below are measured through the characterization of a certain thermal state of the system as there is no traditional thermometer capable of measuring temperatures at such low levels. In this study, we develop a kind of diamond with sp2-sp3 composite phase to tackle this problem. The synthesized composite phase diamond (CPD) exhibits a negative temperature coefficient, providing an excellent fit across a broad temperature range, and reaching a temperature measurement limit of 1 mK. Additionally, the CPD demonstrates low magnetic field sensitivity and excellent thermal stability, and can be fabricated into probes down to 1 micron in diameter, making it a promising candidate for the manufacture of next-generation cryogenic temperature sensors. This development is significant for the low-temperature physics researches, and can help facilitate the transition of quantum computing, quantum simulation, and other related technologies from research to practical applications.

show abstract

Diamond-Graphene Nanohybrid (DGN) Films: Preparation, Characterization and Application

Zhai,

Liu,

Zhang

et al. 2024

Topics in Applied Physics

View full text Add to dashboard Cite

Tailoring the sp2/sp3 carbon composition for surface enhancement in Raman scattering

Cited by 7 publications

References 46 publications

Cu-Based Catalysts Supported on H₃PO₄-Activated Coffee Biochar for Selective Reduction of Nitroaromatics

Cu-Based Catalysts Supported on H₃PO₄-Activated Coffee Biochar for Selective Reduction of Nitroaromatics

Diamond with Sp2-Sp3 composite phase for thermometry at Millikelvin temperatures

Diamond-Graphene Nanohybrid (DGN) Films: Preparation, Characterization and Application

Contact Info

Product

Resources

About

Tailoring the sp2/sp3 carbon composition for surface enhancement in Raman scattering

Cited by 7 publications

References 46 publications

Cu-Based Catalysts Supported on H3PO4-Activated Coffee Biochar for Selective Reduction of Nitroaromatics

Cu-Based Catalysts Supported on H3PO4-Activated Coffee Biochar for Selective Reduction of Nitroaromatics

Diamond with Sp2-Sp3 composite phase for thermometry at Millikelvin temperatures

Diamond-Graphene Nanohybrid (DGN) Films: Preparation, Characterization and Application

Contact Info

Product

Resources

About

Cu-Based Catalysts Supported on H₃PO₄-Activated Coffee Biochar for Selective Reduction of Nitroaromatics

Cu-Based Catalysts Supported on H₃PO₄-Activated Coffee Biochar for Selective Reduction of Nitroaromatics