Ultrasonic-assisted modification of a novel silkworm-excrement-based porous carbon with various Lewis acid metal ions for the sustained release of the pesticide thiamethoxam

Wei, Yannan; Wu, Yuxiang; Chang, Qing; Xie, Meixuan; Wang, Xinhui; Mo, Jinwen; He, Xuekun; Zhao, Zhenxia

doi:10.1039/c7ra04595f

Cited by 15 publications

(10 citation statements)

References 42 publications

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“…To further investigate the graphitic structure of synthesized GPC, XPS measurement was carried out. As shown in Figure d, the GPC was mainly composed of four peaks centered at around 284.7, 285.7, 287.0, and 289.0 eV, which were assigned to sp 2 C (graphitic carbon), sp 3 C, CN, and C–O, , respectively. The relative intensity ratio of the two signals C sp 2 /C sp 3 was ∼2:1, revealing the high content of graphitic carbon in GPC.…”

Section: Results and Discussionmentioning

confidence: 99%

Graphitized Porous Carbon for Rapid Screening of Angiotensin-Converting Enzyme Inhibitory Peptide GAMVVH from Silkworm Pupa Protein and Molecular Insight into Inhibition Mechanism

Tao

Sun

Liu

et al. 2017

J. Agric. Food Chem.

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A novel hydrophobic hexapeptide with high angiotensin-converting enzyme (ACE) inhibitory activity was screened from silkworm pupa protein (SPP) hydrolysate via graphitized porous carbon and reverse-phase high-performance liquid chromatography methods. Graphitized porous carbon derived from dopamine, possessing high surface area and high graphitic carbon, was used to rapidly screen and enrich hydrophobic peptides from SPP hydrolysate. The ACE inhibition pattern and mechanism of the purified peptide were also systematically studied by the classic Lineweaver-Burk model and by molecular docking/dynamic simulation. The novel hydrophobic hexapeptide was identified as Gly-Ala-Met-Val-Val-His (GAMVVH, IC = 19.39 ± 0.21 μM) with good thermal/antidigestive stabilities. Lineweaver-Burk plots revealed that GAMVVH behaved as a competitive ACE inhibitor. It formed hydrogen bonds with S1 and S2 pockets of ACE and established competitive coordination with Zn(II) of ACE. The synergy of hydrogen bonds with active pockets and Zn(II) coordination efficiently changed the three-dimensional structure of ACE and thus inhibited bioactivity of ACE.

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Section: Results and Discussionmentioning

confidence: 99%

Graphitized Porous Carbon for Rapid Screening of Angiotensin-Converting Enzyme Inhibitory Peptide GAMVVH from Silkworm Pupa Protein and Molecular Insight into Inhibition Mechanism

Tao

Sun

Liu

et al. 2017

J. Agric. Food Chem.

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“…Original SE has diffraction peaks at 2θ = 15.2/24.6° and 26.79/29.32° indexed to CaCO 3 and SiO 2 species, 30 respectively, which might have come from silkworms’ food components. 31 After being calcined at a high temperature, the diffraction peak in all spectra appearing around 25.5° corresponded to the (002) plane of a partially graphitized structure. 32 After doping Fe species, new peaks at 2θ = 36.0/45.1 and 41.3/46.1° in Fe@C-1 and Fe@C-2 represent Fe 3 C and Fe 5 C 2 structures, respectively, 33 and the peak intensity increases with the increased Fe loading amounts.…”

Section: Resultsmentioning

confidence: 94%

“…Calculations were performed via density functional theory (DFT) following the gradient-corrected hybrid density functional B3LYP method . Chemical structures of MA and AY were optimized with the polarized continuum model and dielectric constant of ethanol condition . All calculations were conducted with a 6-311g+(d) basis set as implemented in a Gaussian 09 package (revision C.01).…”

Section: Methodsmentioning

confidence: 99%

Porous Fe@C Composites Derived from Silkworm Excrement for Effective Separation of Anisole Compounds

Huang²,

Huang

et al. 2019

ACS Omega

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Silkworm excrement is a very useful biomass waste, composed of layer-structured fats and proteins, which are great precursors for carbon composite materials. In this work, new porous composites derived from silkworm excrement were prepared for selective separation of flavor 4-methylanisole from the binary 4-methylanisole/4-anisaldehyde mixture. In particular, the silkworm excrement, possessing a unique nanosheet structure, is converted into a graphite-like carbon by a simple calcination strategy followed by a metal-ion-doping procedure. This Fe@C composite exhibits a special nano-spongy morphology, anchoring Fe3C/Fe5C2 on the carbon nanosheets. Density functional theory simulations showed that 4-methylanisole presents a stronger π–π interaction and attraction forces with sp2 carbon nanosheets in Fe@C composites than 4-anisaldehyde. The selective adsorption experiments further confirmed that the Fe@C composites exhibited a 4-methylanisole capacity of 7.3 mmol/g at 298 K and the highest selectivity of 17 for an equimolar 4-methylanisole/4-anisaldehyde mixture among the examined adsorbents including MOFs and commercial activated carbon materials, which demonstrates the potential of this low-cost and eco-friendly porous carbon material as a promising sustainable adsorbent.

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“…Therefore, the employment of bio-resources is becoming more and more popular, and is considered to be a low-cost and renewable route to obtaining low biotoxic CNPs and CDs [ 44 , 45 , 46 , 47 ]. Silkworm excrement is an agricultural waste produced by Bombyx mori in quantities of millions of metric tons every year, and has always been utilized as a traditional Chinese medicine and fertilizer [ 48 , 49 ]. In fact, silkworm excrement is mainly composed of fibers, fats, proteins, amino acids and so on, which is suitable for the preparation of nitrogen-doped CNPs.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-Doped Carbon Nanoparticles Derived from Silkworm Excrement as On–Off–On Fluorescent Sensors to Detect Fe(III) and Biothiols

Liu

Wang

et al. 2018

Nanomaterials

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On–off–on fluorescent sensors based on emerging carbon nanoparticles (CNPs) or carbon dots (CDs) have attracted extensive attention for their convenience and efficiency. In this study, dumped silkworm excrement was used as a novel precursor to prepare fluorescent nitrogen-doped CNPs (N-CNPs) through hydrothermal treatment. The obtained N-CNPs showed good photoluminescent properties and excellent water dispersibility. Thus, they were applied as fluorescence “on–off–on” probes for the detection of Fe(III) and biothiols. The “on–off” process was achieved by adding Fe(III) into N-CNP solution, which resulted in the selective fluorescence quenching, with the detection limit of 0.20 μM in the linear range of 1–500 μM. Following this, the introduction of biothiols could recover the fluorescence efficiently, in order to realize the “off–on” process. By using glutathione (GSH) as the representative, the linear range was in the range of 1–1000 μM, and the limit of detection was 0.13 μM. Moreover, this useful strategy was successfully applied for the determination of amounts of GSH in fetal calf serum samples.

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Ultrasonic-assisted modification of a novel silkworm-excrement-based porous carbon with various Lewis acid metal ions for the sustained release of the pesticide thiamethoxam

Abstract: Ultrasonic-assisted metal modification of a novel biocarbon for enhance the sustained release (∼40 days) of pesticide thiamethoxam.

Cited by 15 publications

References 42 publications

Graphitized Porous Carbon for Rapid Screening of Angiotensin-Converting Enzyme Inhibitory Peptide GAMVVH from Silkworm Pupa Protein and Molecular Insight into Inhibition Mechanism

Graphitized Porous Carbon for Rapid Screening of Angiotensin-Converting Enzyme Inhibitory Peptide GAMVVH from Silkworm Pupa Protein and Molecular Insight into Inhibition Mechanism

Porous Fe@C Composites Derived from Silkworm Excrement for Effective Separation of Anisole Compounds

Nitrogen-Doped Carbon Nanoparticles Derived from Silkworm Excrement as On–Off–On Fluorescent Sensors to Detect Fe(III) and Biothiols

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