Atmospheric pressure plasma engineered superhydrophilic CuO surfaces with enhanced catalytic activities

Dey, Avishek; Chandrabose, Gauthaman; Ghosh, Paheli; Damptey, Lois; Clark, Adam H.; Selvaraj, Vimalnath; Kumar, R. Vasant; Braithwaite, Nicholas; Zhuk, Siarhei; Dalapati, Goutam Kumar; Ramakrishna, Seeram; Krishnamurthy, S.

doi:10.1016/j.apsusc.2021.150413

Cited by 15 publications

(3 citation statements)

References 81 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, a set of satellite peaks at 941.5, 944.1, and 962.4 eV were observed as well and were assigned to bivalence state of Cu, which were probably attributed to the superficial oxidation of selenides. [ 73 ] Similarly, the high‐resolution Cu 2p spectrum at full‐discharged state displayed a mixed valence of Cu + and Cu 2+ . And the absence of Cu 0 should be attributed to superficial oxidation induced by high surface energy of nanoparticles and limited probing depth of XPS measurement.…”

Section: Resultsmentioning

confidence: 99%

Synergistically Achieving Superior Sodium Storage of Metal Selenides by Constructing N‐Doped Carbon Foams and Utilizing Cu‐Driven Replacement Reaction

Chang

Long

Bin

et al. 2023

Small

View full text Add to dashboard Cite

Metal selenides are considered as one of the most promising anode materials for Na‐ion batteries owing to high specific capacity and relatively higher electronic conductivity compared with metal sulfides or oxides. However, such anodes still suffer from huge volume change upon repeated Na+ insertion/extraction processes and simultaneously undergo severe shuttle effect of polyselenides, thus leading to poor electrochemical performance. Herein, a facile chemical‐blowing and selenization strategy to fabricate 3D interconnected hybrids built from metal selenides (MSe, M = Mn, Co, Cr, Fe, In, Ni, Zn) nanoparticles encapsulated in in situ formed N‐doped carbon foams (NCFs) is reported. Such hybrids not only provide ultrasmall active nanobuilding blocks (≈15 nm), but also efficiently anchor them inside the conductive NCFs, thus enabling both high‐efficiency utilization of active components and high structural stability. On the other hand, Cu‐driven replacement reaction is utilized for efficiently inhibiting the shuttle effect of polyselenides in ether‐based electrolyte. Benefiting from the combined merits of the unique MSe@NCFs and the utilization of the conversion of metal selenides to copper selenides, the as‐obtained hybrids (MnSe as an example) exhibit superior rate capability (386.6 mAh g−1 up to 8 A g−1) and excellent cycling stability (347.7 mAh g−1 at 4.0 A g−1 after 1200 cycles).

show abstract

Section: Resultsmentioning

confidence: 99%

Synergistically Achieving Superior Sodium Storage of Metal Selenides by Constructing N‐Doped Carbon Foams and Utilizing Cu‐Driven Replacement Reaction

Chang

Long

Bin

et al. 2023

Small

View full text Add to dashboard Cite

show abstract

“…4(d). This peak is associated with metal-oxygen bonding in the CuO lattice, indicating the high degree of oxidation of metallic Cu due to heat treatment [11] . Both spectra exhibit impurity peaks at 531.1 eV and 531.6 eV, respectively, which may be due to the presence of hydroxyl oxygen on the electrode surface.…”

Section: Resultsmentioning

confidence: 99%

Enzyme-free photoelectrochemical sensing of glucose based on the TiO2/CuO heterojunction

Ke¹,

Zhang²,

Zhu³

et al. 2023

Third Optics Frontier Conference (OFS 2023)

View full text Add to dashboard Cite

Conventional enzyme-based glucose sensors have good selectivity and sensing performance, but the disadvantages of the enzyme itself (enzyme activity is susceptible to pH and temperature) lead to a limited number of uses and result in high costs. Therefore, photoelectrochemical enzyme-free glucose sensors have attracted research interest in recent years. In this work, the TiO2/CuO heterojunction was constructed and photoelectrochemical enzyme-free glucose sensing was realized. The sensing sensitivity of the TiO2/CuO heterojunction photoelectrode prepared by magnetron sputtering and thermal annealing process was 864 μAμM-1 cm-2 in the range of 1–9 mM with a detection limit of 58.6 μM at 0.2 V, exhibiting satisfactory stability as well as interference resistance. This better sensing performance mainly comes from: 1) the absorption of photogenerated carriers generated from sunlight by TiO2 films, which participate in glucose redox; 2) the conversion of the metal valence state (Cu2+/Cu3+) of the P-type semiconductor CuO under alkaline conditions can promote glucose redox; 3) the heterojunction formed by CuO and TiO2 reducing the compounding of photogenerated carriers thus improving the photoelectric conversion efficiency. The heterojunction formed by CuO and TiO2 greatly facilitates the surface carrier transfer of glucose oxidation reaction. This work provides a new way for enzyme-free glucose sensing and promotes the development of glucose detection technology.

show abstract

“…The binding energy associated with the O 1s XPS spectrum in Figure 1d shows a strong peak at 529.28 eV, which is associated with metal-oxygen bonding in the CuO lattice. Meanwhile, the peak around 530.84 eV is an impurity peak which exhibits hydroxyl oxygen on the surface [27]. The XPS spectra were also examined on the different samples with different heat treatment temperatures, but the peak differences were trivial.…”

Section: Resultsmentioning

confidence: 99%

Unbiased and Signal-Weakening Photoelectrochemical Hexavalent Chromium Sensing via a CuO Film Photocathode

et al. 2023

Nanomaterials

View full text Add to dashboard Cite

Photoelectrochemical (PEC) sensors show great potential for the detection of heavy metal ions because of their low background noise, high sensitivity, and ease of integration. However, the detection limit is relatively high for hexavalent chromium (Cr(VI)) monitoring in addition to the requirement of an external bias. Herein, a CuO film is readily synthesized as the photoactive material via reactive sputtering and thermal annealing in the construction of a PEC sensing photocathode for Cr(VI) monitoring. A different mechanism (i.e., Signal-Weakening PEC sensing) is confirmed by examining the electrochemical impedance and photocurrent response of different CuO film photoelectrodes prepared with the same conditions in contact with various solutions containing concentration-varying Cr(VI) for different durations. The detection of Cr(VI) is successfully achieved with the Signal-Weakening PEC response; a drop of photocathode signal with an increasing Cr(VI) concentration from the steric hindrance effect of the in situ formed Cr(OH)3 precipitates. The photocurrent of the optimized CuO film photocathode linearly declines as the concentration of Cr(VI) increases from 0.08 to 20 µM, with a detection limit down to 2.8 nM (Signal/Noise = 3) and a fitted sensitivity of 4.22 µA·μM−1. Moreover, this proposed sensing route shows operation simplicity, satisfactory selectivity, and reproducibility.

show abstract

Atmospheric pressure plasma engineered superhydrophilic CuO surfaces with enhanced catalytic activities

Cited by 15 publications

References 81 publications

Synergistically Achieving Superior Sodium Storage of Metal Selenides by Constructing N‐Doped Carbon Foams and Utilizing Cu‐Driven Replacement Reaction

Synergistically Achieving Superior Sodium Storage of Metal Selenides by Constructing N‐Doped Carbon Foams and Utilizing Cu‐Driven Replacement Reaction

Enzyme-free photoelectrochemical sensing of glucose based on the TiO2/CuO heterojunction

Unbiased and Signal-Weakening Photoelectrochemical Hexavalent Chromium Sensing via a CuO Film Photocathode

Contact Info

Product

Resources

About