FOOD CHEMISTRY
·
2023
·
IF 8.8
Meijuan Lan,Tongshuai Li,Lin Li,Shaoyun Wang,Juncheng Chen,Tangyu Yang,Zhiru Li,Yipeng Yang,Xia Zhang,Bing Li
The physiochemical properties, structure characteristics, oxidation, and emulsifying properties of myofibrillar proteins (MPs) in low salt solution after treated by the ultrasound were investigated. The solubility, mean diameters, sulfhydryl content, and carbonyl contents of MPs after ultrasonic treatment increased, while the turbidity decreased. The surface hydrophobicity of MPs with 200 W–600 W treatment increased, but decreased at 800 W treatment. The circular dichroism analysis revealed that α-helix content increased, while β-sheet and random coil content decreased after ultrasonic treatment. Fluorescence spectroscopy indicated the fluorescence intensities of MPs were increased after ultrasonic treatment. SDS-PAGE results showed more protein polymers due to myosin heavy chain (MHC) aggregation via disulfide bonds. Based on LC-MS/MS result, the myosin heavy chain was susceptible to oxidation, with monooxidation being the main oxidative modification. Finally, the emulsions stabilized by ultrasonically treated MPs, especially those treated at 800 W, exhibited decreased particle size, improved uniformity, and enhanced stability.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Therapeutics
·
2023
·
IF 4.6
Tianliang Li,Lixing Lin,Dong Wang,Haowen Fang,Zhiwei Zhang,Yitong Wang,Yingying Chen,Lingyan Feng
The increasing bacterial resistance highlights the necessity of developing superior antibacterial materials. Metal-doped carbon dots (CDs), a crucial branch of carbon-based nanozymes, exhibit efficient antibacterial properties using the reactive oxygen species (ROS) effect. In this study, iron-doped carbon dots (Fe-CDs) are synthesized with high peroxidase-like (POD-like) activity using natural hemin as a precursor for the first time. The formation of Fe-CDs remarkably improves the water solubility of hemin showing excellent biocompatibility. Additionally, iron is doped from hemin to the CDs surface, reducing the risk of trial-and-error associated with adding an external iron source. The Fe-CDs-hydrogel system is constructed via the incorporation of Fe-CDs into a dual-crosslinked injectable hydrogel, taking advantage of the synergistic effects. The system enhances the mechanical properties of hydrogel and serves as an excellent carrier for Fe-CDs. It exhibits effective antibacterial activity at low hydrogen peroxide (H 2 O 2 ) concentrations (10 −4 m ) via the activation of Fenton-like reaction-triggered POD-like catalytic activity and the electrostatic interactions. The system further demonstrates excellent healing efficacy in a bacteria-infected wound model by reducing inflammation levels and accelerating the regeneration of tissues. This study provides a novel approach for applying nanozymes in antibacterial therapy and wound healing.
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2023
·Vol. 16
·期 5
·731-741
·
IF 3.1
Liyuan Yu,Mengxiao Lv,Ting Zhang,Qixin Zhou,Juanhua Zhang,Xuexiang Weng,Yongming Ruan,Jiuju Feng
Herein, we present a simple and mild method to in situ prepare CuO nanostructures for non-enzymatic glucose sensing. A Cu-metal organic framework (Cu-MOF) precursor was first directly grown on a pencil lead electrode with 3D graphene-like surfaces (EPLE) and then in situ transformed into CuO nanorods. The CuO nanorod-modified EPLE (CuO/EPLE) shows high sensitivity (1138.32 μA mM−1 cm−2), fast response time (1.5 s) and low detection limit (0.11 μM) for glucose oxidation. It has been found that NaOH promoted the generation of ˙OH groups and Cu(III) on the CuO surface, which then facilitated the electrochemical oxidation of glucose. Signals characteristic of hydroxyl and carbon-centered radical adducts were detected by EPR. Furthermore, the CuO/EPLE sensor also shows good accuracy in glucose determination in human serum samples.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yuexiang Wang,Hui Zhou,Jing Kong,Ming Shen
A broad-spectrum responsive organic-inorganic heterojunction was synthesized by in-situ self-assembled perylene diimide (PDIsm) through π-π stacking onto the surface of flower-like BiOCOOH. The PDIsm/BiOCOOH with different compositions exhibited enhanced photocatalytic degradation of levofloxacin under visible light irradiation. Among them, 10% PDIsm/BiOCOOH had the best photocatalytic activity, which was 4.6 and 14.1 times higher than pure PDIsm and BiOCOOH, respectively. The enhancement of photocatalytic activity was mainly attributed to the introduction of PDIsm which significantly improved the light absorption in almost the whole visible light range. Besides, the formed heterojunctions facilitate the separation and transfer of photogenerated charge carriers. In addition, after five cycles of degradation, the degradation rate of the PDIsm/BiOCOOH composite for levofloxacin hydrochloride remained above 75%, indicating its good photocatalytic activity and stability. Furthermore, free radical capture experiments and electron spin resonance experiments verify that •O 2 ‾ and h + were the active species generated in the photocatalytic process. Combining the experimental results of high-performance liquid chromatography-mass spectrometry, a possible photocatalytic reaction mechanism was proposed. This work provides a way to prepare an efficient organic-inorganic photocatalyst , which can potentially be utilized in environmental remediation under visible light.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2023
·
IF 8.3
Longjie Liu,Zeyang Lu,Wanling Cai,Gary Owens,Zuliang Chen
Reduced graphene oxide/iron nanoparticles (rGO/FeNPs) synthesized by the chemical method have been used in Fenton oxidation of organic contaminants , yet little is known about biosynthesized rGO/FeNPs using green tea extract (GT) as how to activate persulfate in sulfate radical-based advanced oxidation processes . In this study, rGO/FeNPs were used to activate peroxydisulfate (PDS) for 17β-estradiol (βE 2 ) and estriol (E 3 ) removal. The rGO/FeNPs-PDS system removed 83.6% of βE 2 and 62.5% of E 3 within 240 min, which was confirmed by a combination of adsorption and degradation via both radical and non-radical pathways. Four main reactive species in βE 2 and E 3 degradation were observed, i.e., hydroxyl radical (·OH), sulfate radical (SO 4 ·− ), singlet oxygen ( 1 O 2 ) and electron transfer , with the respective contributions of ·OH (32.9 and 34.7%), SO 4 ·− (16.1 and 19.7%), 1 O 2 (12.2 and 14.1%) and electron transfer (8.0 and 7.2%). Analysis of X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR), Electron Paramagnetic Resonance (EPR) and electrochemical measurements all indicated that beside the well-known role of Fe, C O from rGO through the generation of ·OH, SO 4 ·− , 1 O 2 and electron transfer, as well as GT through electron transfer also participated in the activation of PDS. Finally, the degradation pathways of βE 2 /E 3 were proposed. Overall, this study provides a new insight into the biosynthesis of rGO/FeNPs to activate PDS for the oxidation of mixed emerging contaminants .
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Rong Ji,Yuming Dong,Hui Zhao,Chengsi Pan,Guangli Wang,Yongfa Zhu,Junshan Li
Fenton technology has been famous on antibiotics removal, but seriously restricted by the extra addition of H 2 O 2 and low mineralization efficiency. Herein, we develop a novel cobalt-iron oxide/perylene diimide organic supermolecule (CoFeO/PDIsm) Z-scheme heterojunction under photocatalysis-self-Fenton system, in which the holes (h + ) of photocatalyst can mineralize organic pollutants and the photo-generated electrons (e − ) are used to in-situ H 2 O 2 production with high efficiency. The CoFeO/PDIsm exhibits superior in-situ H 2 O 2 production at a rate of 281.7 µmol g −1 h −1 in contaminating solution, correspondingly of total organic carbon (TOC) removal rate of ciprofloxacin (CIP) is 63.7 %, far exceeding current photocatalysts. The high H 2 O 2 production rate and remarkable mineralization ability are ascribed to great charge separation in Z-scheme heterojunction. This work provides a novel Z-scheme heterojunction with photocatalysis-self-Fenton system for environmental-friendly removing the organic containment.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Ming-Hui Sun,Ming-Yu Qi,Zi-Rong Tang,Yi-Jun Xu
Simultaneously utilizing photoinduced electrons and holes to direct splitting of thiols into value-added disulfides and clean hydrogen (H 2 ) fuels conforms the development standards of green chemistry. Herein, a cobalt phosphate (Co-Pi) and reduced graphene oxide (GR) modified CdS photocatalyst is synthesized and utilized for photocatalytic selective conversion of 4-methoxythiophenol (4-MTP) to bis(4-methoxyphenyl) disulfide (4-MPD) coupled with H 2 evolution. In this dual-cocatalyst system, Co-Pi effectively captures and releases the holes from CdS through the chemical state change of Co to accelerate the surface thiols oxidation reaction, while GR is used as an electron collector and an active site for the proton reduction to H 2 . Consequently, the bifunctional GR-CdS-(Co-Pi) photocatalyst demonstrates significantly higher photoactivity than blank CdS. This work affords a new paradigm of incorporating dual-cocatalysts with semiconductor photocatalysts to efficiently take advantage of the photoinduced electrons and holes for photoredox-catalyzed cooperative coupling of organic transformation and H 2 evolution.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Ning Li,Huanxuan Li,Ran Ji,Sihang Lin,Chen Xu,Jingang Huang,Qingwei Zhou,Shuguang Lyu,Feng Li,Junhong Tang
Due to the fast and high oxidation efficiency for organic pollutants , it is extremely challengeable to develop efficient catalysts for peroxymonosulfate (PMS) to enhance the removal efficiency of pollutants. Herein, we fabricated a bimetallic MOF (CuCo-ABDC) by a facile hydrothermal process, which displayed 2D nanosheets structure and rich active sites. The characterization results showed that CuCo-ABDC-4 with Cu:Co ratio of 1:1 synthesized via temperature gradient ((100 ℃, 24 h) + (150 ℃, 12 h)) had low-crystalline but high catalytic performance towards PMS. With orange G (OG) as the model organic pollutant, CuCo-ABDC-4 displayed the highest catalytic activity for activation of PMS, where 96.4% of OG removal efficiency was achieved within 60 min via a rate constant of 0.052 min −1 . The excellent catalytic activity can be attributed to the high density and uniformly distributed unsaturated Co(II) which was considered to be the main active site, and the interaction between Co and Cu species in the bimetallic MOF. The quenching experiments indicated the production of SO 4 •− , · OH, and 1 O 2 in CuCo-ABDC-4/PMS system and 1 O 2 acted as the predominant reactive species for degradation of OG. Moreover, the presence of NO 2 − , H 2 PO 4 − , SO 4 2− , HCO 3 − and HA exhibited evident inhibition on the OG degradation rate. On the contrary, the existence of CO 3 2− could promote the OG degradation due to the production of carbonate radical. This work introduces a novel and facile fabrication strategy to attain 2D nanosheets structure bimetallic catalysts with high catalytic performance for activation of PMS in wastewater treatment .
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Qiong Wen,Na Liu,Ruohua Qu,Fei Ge
The photoaging of microplastics (MPs) accumulated in the sea can be influenced by humic acid (HA). However, the role of salinity cannot be ignored, as it may potentially disrupt the interaction between MPs and HA, thereby altering the photoaging of MPs. Herein, this study investigated how salinity influences the effect of humic acid (HA, derived from lignite) on the photoaging of polystyrene microplastics (PS MPs) in artificial and natural seawater. The results revealed that HA promoted the photoaging of PS MPs under both low (5 PSU) and high salinity (35 PSU) in light conditions (L), reflected in the formation of fragments, the production of oxygen–containing functional groups (O H, C O, and O C O), and the increase in hydrophilicity of PS MPs. Furthermore, high salinity promoted the photoaging of PS MPs with HA more significantly, as evidenced by the similar indicators and the order of oxygen/carbon atom ratio (O/C): L–HA–High (0.15) > L–HA–Low (0.10) > Unaged (0.02). Interestingly, due to the reduction of electrostatic repulsion, the adsorption of HA on photoaged PS MPs in natural and artificial high salinity seawater was 1.77 mg/g and 0.39 mg/g, respectively, which was significantly higher than those PS MPs photoaged in the low salinity seawater. Furthermore, the electron spin resonance (ESR) results confirmed that more hydroxyl radicals ( OH) were generated after adsorbing HA under high salinity conditions, thus promoting the fragmentation and oxidation of PS MPs. Overall, our findings highlight the crucial role of salinity in influencing the photoaging of MPs with HA and help to assess the marine risk of MPs accurately.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Umar Abdulbaki Danhassan,Xin Zhang,Riying Qi,Mahmoud M. Ali,Kuichuan Sheng,Hongjian Lin
Pristine biochar (PBC) is flourishing in adsorptive oxidation for pollutants remediation as an alternative to carbon adsorbents derived from coal/petroleum carbon sources, multistep, and hash synthesis. However, it is widely overlooked for aqueous S 2- remediation because the rational design of biochar with proper conductive and porous structure is challenging. Cobalt or iron ion was impregnated in biomass to produce biochar with different porous and conductive structures and explore S 2- adsorptive oxidation mechanism. Finding suggests cobalt and iron ions facilitate biomass decomposition to remove volatile matter, which transforms them into elemental cobalt (Co 0 ) or magnetite (Fe 3 O 4 ) on biochars (BC-Co) or (BC-Fe) and improves the porous structure. BC-Co benefitted from superior mesopores to adsorb S 2- 2.4 and 35 times faster than PBC and BC-Fe, achieving 811 ± 146 mg-S 2- /g maximum capacity. BC-Fe removed S 2- far less than PBC because Fe 3 O 4 on its surface blocked S 2- diffusion channel to the active site. It is postulated that S 2- was removed from water via external and internal diffusion and adsorption and oxidation at active sites. S 2- diffuses from bulk liquid to film near the biochar pore and into the pores via pore and surface diffusion to the active site, where it is adsorbed and oxidized to elemental sulfur or sulfate by quinone , semiquinone, or hydroxyl radicals at the wall of biochars. This study has documented fundamental information for developing mesoporous electroactive biochar for contaminant removal.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Siyuan Li,Yidi Zhang,Hao Jin,Hang Gao,Shuwei Liu,Wanrui Shi,Wei Sun,Yi Liu,Hao Zhang
Diabetes-related chronic wounds characterized by hyperglycemia and weak alkaline milieu provide numerous advantages for bacteria growth and biofilm formation, setting a myriad of stumbling blocks for wound healing. Therefore, reshaping the spatially and temporally pathological wound microenvironment against bacterial infection is critical to rescue stalled healing progress in diabetes-related chronic wounds. Herein, we demonstrate on the room-temperature construction of a glucose oxidase (GOx)-mimicking and peroxidase (POD)-mimicking dual-nanozymes catalytic cascade system upon the partial reduction of Fe 3+ to Fe 2+ and the deposition of Au nanoparticles, simultaneously. The as-prepared dual-nanozymes catalytic cascade system possesses the capabilities of reshaping the pathological microenvironments of diabetic wound via glucose consumption and acidification, leading to amplified catalytic cascade activities for sterilization. On the one hand, the GOx-mimicking enzymatic activity of the catalytic cascade system can not only deplete glucose and acidize wound milieu to inhibit bacteria growth, but also utilize the weak alkaline milieu of diabetic wound to provide sufficient H 2 O 2 and a favorable pH for subsequent OH generation. On the other hand, the POD-mimicking enzymatic activity of the catalytic cascade system can continuously produce OH for sterilization under the weak acidic milieu in the presence of abundant H 2 O 2 . Benefiting from the simply and mild preparation process and the excellent dual-nanozymes catalytic cascade activities under the deliberate evolved milieus of diabetes-related chronic wounds, our catalytic cascade system exhibits the promising healing effect and clinical translation potential against diabetic wound infection.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Ze Yang,Songding Guo,Zhenglai Huan,Yongbing Zhu,Tingting Zhang,Shangyi Li
In this study, we dexterously constructed a unique in situ interface oxidation–adsorption dual-reaction platform through the self-excitation of ferrate (Fe(VI))/peroxymonosulfate (PMS) for phenylarsonic acid (PAA) and inorganic As(V) removal. When the molar ratio of Fe(VI)/PMS was 1:2, 80% degradation of PAA could be achieved within 180 min and the apparent constant value of the reaction rate ( k obs ) would reach up to 0.185 min −1 . 1 O 2 and Fe(IV) were the main active species for degradation of PAA in Fe(VI)/PMS reaction system. In addition, we explored the possible degradation intermediates and pathway of PAA. In situ Fe(III) oxides generated from Fe(VI) decomposition could adsorb arsenic pollutants through ligand exchange with inorganic As(V) through surface hydroxyl groups to form Fe-O-As bonds. The effect of coexisting anions on the removal performance of the system was investigated, and the results showed that the presence of PO 4 3− and CO 3 2− promoted the oxidative degradation of PAA owing to the activation of PMS by PO 4 3− and CO 3 2− , but Cl − can inhibit the PAA degradation through a free radical scavenging mechanism. PO 4 3− and SiO 3 2− affected the adsorption and removal of the released inorganic As(V) due to their competitive adsorption of in situ Fe(III) oxides. Density functional theory (DFT) calculations indicated an obvious electron transfer (1.83 e) between the in situ Fe(III) oxides and inorganic As(V) with a high adsorption energy of −10.30 eV. These results indicate that the combination of Fe(VI) and PMS can effectively control the total arsenic (total-As) in water bodies.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）