Impact of carbon quantum dots on dynamic properties of BSA and BSA/DPPC adsorption layers

Lai, Lu; Wei, Xiaoqian; Huang, Wei-Hua; Mei, Ping; Zhao-hua, Ren; Liu, Yi

doi:10.1016/j.jcis.2017.07.046

Cited by 12 publications

(6 citation statements)

References 56 publications

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“…The occupation of the (NH 4 ) 2 SO 4 , NH 4 HSO 4 , and H 2 O species at the active sites of the catalysts led to inactivation of the catalyst. On the other hand, the capability of N-CQDs and Pal acting as adsorbents for SO 2 and H 2 O may prevent NH 3 from being sulfated, so as to avoid the accumulation of (NH 4 ) 2 SO 4 or NH 4 HSO 4 . − After stopping SO 2 and H 2 O, both catalysts demonstrate significant recovery of NO x conversion. This indicates that the inhibition is reversible with competitive adsorption of SO 2 and NO x molecules on the catalysts because of their similar adsorption characteristics …”

Section: Resultsmentioning

confidence: 99%

Palygorskite Immobilized Direct Z-Scheme Nitrogen-Doped Carbon Quantum dots/PrFeO₃ for Photo-SCR Removal of NO_x

Shi

Yan

et al. 2018

ACS Sustainable Chem. Eng.

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Photocatalysis-selective catalytic reduction (photo-SCR) of NO x is recognized as a potential approach for the abatement of nitrogen oxides. However, the development of an efficient photocatalyst for photo-SCR is strongly desired. In the current work, nitrogen-doped carbon quantum dots (N-CQDs)-modified PrFeO3 /palygorskite (Pal) was prepared by a sol–gel/impregnation method. Results indicate that Pal nanorod not only exhibits excellent adsorption performance for gas molecules but also behaves as an ideal support for the immobilization of perovskite particles, leading to enhanced charge separation and visible light absorption facilitated by the formation of Z-scheme heterostructure of N-CQDs/PrFeO3, as revealed by the photoluminescence spectra and Mott–Schottky characterizations. The influence of the mass fraction of N-CQDs relative to PrFeO3 (from 1 to 9 wt %) on the NO x conversion and N2 selectivity was investigated under visible light irradiation. The 5 wt % N-CQDs/PrFeO3/Pal is found to display the highest efficiency of 93% and 100% N2 selectivity favored by abundant acid sites and excellent reducibility, as indicated in NH3-TPD and H2-TPR measurements. Additionally, the tolerance to SO2 and H2O shows no obvious deactivation due to the fact that N-CQDs and Pal can benefit the adsorption of SO2 and H2O and prevent NH3 from being sulfated by SO2 and the catalyst from being eroded by H2O, respectively.

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Section: Resultsmentioning

confidence: 99%

Palygorskite Immobilized Direct Z-Scheme Nitrogen-Doped Carbon Quantum dots/PrFeO₃ for Photo-SCR Removal of NO_x

Shi

Yan

et al. 2018

ACS Sustainable Chem. Eng.

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“…At a higher concentration (12 nM) of hydrophilic (MUA) GNPs, the VSFG intensity of interfacial water molecules further decreases and approaches zero. This results in a change in the orientation of interfacial water molecules and/or removal of water from the interface. , Lai et al also reported a similar phenomenon, where high concentrations of hydrophilic NPs led to an increase in serum protein adsorption at the interface, resulting in changes in the interfacial properties of the protein . Additionally, the increase in surface pressure of the DPPG monolayer observed by adding hydrophilic (MUA) GNPs (Figure S6a) indicates accumulation of HSA at the interface at higher concentration (12 nM) of GNPs.…”

Section: Resultsmentioning

confidence: 89%

“…82,83 Lai et al also reported a similar phenomenon, where high concentrations of hydrophilic NPs led to an increase in serum protein adsorption at the interface, resulting in changes in the interfacial properties of the protein. 84 Additionally, the increase in surface pressure of the DPPG monolayer observed by adding hydrophilic (MUA) GNPs (Figure S6a) indicates accumulation of HSA at the interface at higher concentration (12 nM) of GNPs. Similar results are observed for hydro-phobic (UDT) GNPs at pH 3 as shown in Figure 5b, indicating that hydrophobic GNPs also lead to the adsorption of the HSA at the lipid interface leading to a reduction in the SFG intensity of water molecule due to the hydrophobic interaction between the alkyl chain of the DPPG monolayer and the HSA protein with the hydrophobic chain of the hydrophobic (UDT) GNPs.…”

Section: ■ Introductionmentioning

confidence: 98%

How Does pH Affect the Adsorption of Human Serum Protein in the Presence of Hydrophobic and Hydrophilic Nanoparticles at Air–Water and Lipid–Water Interfaces?

Gahtori,

Gunwant,

Pandey

2023

Langmuir

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This study investigates interaction between hydrophilic (11-mercaptoundecanoic acid (MUA)) and hydrophobic (1undecanethiol (UDT)) gold nanoparticles (GNPs) with human serum albumin (HSA) protein on air−water and lipid−water interfaces at pH 3 and 7. Vibrational sum frequency generation (VSFG) spectroscopy is used to analyze changes in the intensity of interfacial water molecules and the C−H group of the protein. At the air−water interface, the hydrophobic interaction between the HSA protein and hydrophobic GNPs at pH 3 leads to their accumulation at the interface, resulting in an increased C−H intensity of the protein with a slight decrease in water intensity. Whereas, at pH 7, where the negative charge of the protein results in the reduced surface activity of the HSA compared to pH 3, the interaction between alkyl chain of the hydrophobic GNPs and alkyl group of the protein results in the adsorption of the protein-capped GNPs at the interface. This leads to an increased intensity of the C−H group of protein and water molecules. However, negatively charged hydrophilic GNPs do not induce significant changes in the interfacial water structure or the C−H group of the protein due to the electrostatic force of repulsion with the negatively charged HSA at pH 7. In contrast, at the lipid−water interface, both hydrophobic and hydrophilic GNPs interact with HSA protein, causing disordering of interfacial water molecules at pH 3 and ordering at pH 7. Interestingly, similar behavior of the protein with both types of GNPs results in comparable ordering/disordering at the interface depending on the pH of solution. Furthermore, the VSFG results obtained with the deuterated lipid suggest that changes in ordering and disorder occur due to increased protein adsorption in the presence of GNPs, causing alterations in the membrane structure. These findings give a better understanding of the mechanisms that govern protein−nanoparticle interaction and their consequential effects on the structure, function, and behavior of molecules at the biological membrane interface, which is crucial for developing safe and effective nanoparticle-based therapeutics.

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“…The BSA molecule consists of three homologous domains (I, II, and III), which are divided into nine rings (L1‐L9) by 17 disulfide bonds [33] . BSA contains tryptophan 134 and 212, which are inherently fluorescent and embedded in the subdomain IIA and first subdomain IB, respectively [34] . BSA is used as an HSA replacing model for biochemistry, biophysical chemistry, and physical chemistry studies due to its high structural resemblance.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterizations of MoS₂ Nanoflowers and Spectroscopic Study of their Interaction with Bovine Serum Albumin

Ma,

Guan,

Cui

et al. 2024

Chemistry & Biodiversity

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Molybdenum disulfide nanoflowers (MoS2 NFs) were prepared by hydrothermal method. The prepared MoS2 NFs was characterized by SEM, TEM, XRD, specific surface areas, Raman and XPS. The characterization results show that the flower‐like spherical MoS2 is composed of many ultra‐thin nanosheets with an average diameter of about 300‐400 nm. MoS2 NFs also exhibits excellent absorption and high fluorescence intensity. In order to explore the biological behavior of MoS2 NFs, the interaction between MoS2 NFs and bovine serum albumin (BSA) was studied by UV–Vis absorption, fluorescence, synchronous fluorescence spectra, and cyclic voltammetry. The results of absorption and fluorescence show that MoS2 NFs and BSA interact strongly through the formation of complexes. The Stern–Volmer constant and the quenching constant was calculated about 3.79×107 L mol−1 and 3.79×1015 L mol−1 s−1, respectively. The synchronous fluorescence implied that MoS2 in the complex may mainly bind to tryptophan residues of BSA. The cyclic voltammograms indicated that the addition of BSA makes electron reduction of MoS2 NFs more difficult than the corresponding free state. These experimental results clarified the effective transportation and elimination of MoS2 NFs in the body by binding to BSA, and can provide useful guideline for estimating MoS2 NFs as a drug carrier.

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Impact of carbon quantum dots on dynamic properties of BSA and BSA/DPPC adsorption layers

Cited by 12 publications

References 56 publications

Palygorskite Immobilized Direct Z-Scheme Nitrogen-Doped Carbon Quantum dots/PrFeO₃ for Photo-SCR Removal of NO_x

Palygorskite Immobilized Direct Z-Scheme Nitrogen-Doped Carbon Quantum dots/PrFeO₃ for Photo-SCR Removal of NO_x

How Does pH Affect the Adsorption of Human Serum Protein in the Presence of Hydrophobic and Hydrophilic Nanoparticles at Air–Water and Lipid–Water Interfaces?

Synthesis and Characterizations of MoS₂ Nanoflowers and Spectroscopic Study of their Interaction with Bovine Serum Albumin

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Impact of carbon quantum dots on dynamic properties of BSA and BSA/DPPC adsorption layers

Cited by 12 publications

References 56 publications

Palygorskite Immobilized Direct Z-Scheme Nitrogen-Doped Carbon Quantum dots/PrFeO3 for Photo-SCR Removal of NOx

Palygorskite Immobilized Direct Z-Scheme Nitrogen-Doped Carbon Quantum dots/PrFeO3 for Photo-SCR Removal of NOx

How Does pH Affect the Adsorption of Human Serum Protein in the Presence of Hydrophobic and Hydrophilic Nanoparticles at Air–Water and Lipid–Water Interfaces?

Synthesis and Characterizations of MoS2 Nanoflowers and Spectroscopic Study of their Interaction with Bovine Serum Albumin

Contact Info

Product

Resources

About

Palygorskite Immobilized Direct Z-Scheme Nitrogen-Doped Carbon Quantum dots/PrFeO₃ for Photo-SCR Removal of NO_x

Palygorskite Immobilized Direct Z-Scheme Nitrogen-Doped Carbon Quantum dots/PrFeO₃ for Photo-SCR Removal of NO_x

Synthesis and Characterizations of MoS₂ Nanoflowers and Spectroscopic Study of their Interaction with Bovine Serum Albumin