ELECTROCHIMICA ACTA
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2021
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IF 6.901
Youxiong Zhang,Xianhu Wei,Qihui Gu,Jumei Zhang,Yu Ding,Liang Xue,Moutong Chen,Juan Wang,Shi Wu,Xiaojuan Yang,Shuhong Zhang,Tao Lei,Qingping Wu
Robust and efficient multimodal catalysis platforms that possess high catalytic activity and enhanced electrical conductivity are preferred for enhancing the electrical analysis performance under a low overpotential. This report describes a function-switchable amperometric sensor for electrochemical monitoring hydrogen peroxide and glucose under relatively low overpotential based on PEI-functionalized metal–organic framework (P-MOF) supported gold nanoparticles/nitrogen-doped graphene quantum dots (AuNPs/N-GQDs) and glucose oxidase. AuNPs/N-GQDs with high peroxidase mimicking activity was anchored on the P-MOF modified electrode surface as H 2 O 2 sensors, exhibiting a high sensitivity of 134.26 μA mM −1 cm −2 and a detection limit of 3.38 μM. Subsequently, AuNPs/N-GQDs-P-MOF used as a nanocarrier for glucose oxidase (GOx) to achieve “cascade nanoreactor” amplification for glucose detection. The amplified amperometric glucose biosensor showed excellent anti-interference ability, reproducibility, and a limit of detection as low as 0.7 μM (S/N = 3) with high sensitivity of 1512.4 μA mM −1 cm −2 . In addition, the feasibility of the electrochemical biosensor for accurate and quantitative detection of glucose in human serum samples was confirmed with a recovery ranging from 93.2 to 99.3%. The strategy of combining AuNPs/N-GQDs-P-MOF and glucose oxidase for cascade catalysis in this work provides a simple yet efficient approach to prepare nanomaterial-based enzyme-mimics and enzymes hybrids with high performance, which holds great potential in biological and chemical applications of electrochemical devices and biosensing.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 46
·期 5
·2526-2533
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IF 3.591
Pengfei Fan,Can Liu,Congcong Hu,Feifei Li,Xi Lin,Shengyuan Yang,Fubing Xiao
Iron-doped carbon dots (Fe-CDs) were greenly synthesized via a one-step hydrothermal method using the eco-friendly materials milk powder and FeCl3. It was found that the synthesized biomass Fe-CDs have photoluminescence properties and strong mimetic oxidase activity, which enables catalysis of the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) to produce a blue product, oxidized TMB (oxTMB). The presence of ascorbic acid (AA) could reduce the oxTMB and make the solution color lighter to realize the colorimetric determination of AA. In addition, the absorption peak of the oxTMB generated at 370 nm overlaps with the excitation spectrum of Fe-CDs, and oxTMB quenched the fluorescence of Fe-CDs based on the internal filtration effect (IFE). The presence of AA will reduce oxTMB and restore the fluorescence of Fe-CDs, and the change of fluorescence intensity is positively correlated with the concentration of AA. Accordingly, a novel method for colorimetric/fluorometric dual-signal detection of AA was developed. The linear range of the colorimetric assay was 25.0–500.0 μM, and the detection limit was 8.59 μM. The linear range of the fluorometric assay was 20.0–500.0 μM with an LOD of 5.13 μM. The method took advantage of different signals to achieve complementarity and eliminate false positives of single signals and improve the accuracy with great application prospects in the detection of AA.
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MICROCHEMICAL JOURNAL
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2021
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IF 4.821
Yuxuan Qin,Chen Hang,Liping Huang,Haiyun Cheng,Junqing Hu,Wenyao Li,Jianghong Wu
In this study, Sn@C composite was fabricated from ZnSn(OH) 6 through a green thermal calcination method. For the first time, this composite was used as a modifier on glassy carbon electrode (GCE) to construct an electrochemical biosensor to detect acetaminophen (AC). The Sn@C sensor exhibited distinctly enhanced performance in electrochemical response to AC compared with bare GCE, GCE modified with Sn and GCE modified with graphene. The linear range is 0.2–100 μM and the limit of detection (LOD) is 0.020 μM based on DPV analysis. The excellent electrochemical behavior can be ascribed to the outstanding conductivity of metal Sn and carbon, and the strong adsorption of the carbon layer to AC. Most importantly, the chemical interaction between Sn and C through Sn-C bond facilitated the electron transfer process in the electrooxidation of AC. Finally, the Sn@C sensor was successfully applied in pharmaceutical samples and spiked serum samples to detect AC with satisfactory recoveries.
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Antioxidants
·
2021
·Vol. 11
·期 1
·38
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IF 6.313
Zhiwei Qiu,Jinzhao He,Guangying Shao,Jiaqi Hu,Xiaowei Li,Hong Zhou,Min Li,Baoxue Yang
Autosomal dominant polycystic kidney disease (ADPKD) is a common inherited disease characterized by progressive enlargement of fluid-filled cysts derived from renal tubular epithelial cells, which has become the fourth leading cause of end-stage renal diseases. Currently, treatment options for ADPKD remain limited. The purpose of this study was to discover an effective therapeutic drug for ADPKD. With virtual screening, Madin-Darby canine kidney (MDCK) cyst model, embryonic kidney cyst model and kidney-specificPkd1knockout mouse (PKD) model, we identified obacunone as a candidate compound for ADPKD drug discovery from a natural antioxidant compound library.In vitroexperiments showed that obacunone significantly inhibited cyst formation and expansion of MDCK cysts and embryonic kidney cysts in a dose-dependent manner.In vivo, obacunone treatment significantly reduced the renal cyst development in PKD mice. Western blot and morphological analysis revealed that obacunone served as a NRF2 activator in ADPKD, which suppressed lipid peroxidation by up-regulating GPX4 and finally restrained excessive cell proliferation by down-regulating mTOR and MAPK signaling pathways. Experimental data demonstrated obacunone as an effective renal cyst inhibitor for ADPKD, indicating that obacunone might be developed into a therapeutic drug for ADPKD treatment.Keywords:obacunone;autosomal dominant polycystic kidney disease;NRF2;glutathione peroxidase;lipid peroxidation;MAPK;mTOR
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高影响因子
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
·
2021
·Vol. 41
·期 1
·230-239
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IF 3.742
Siqi Wu,Huizhen Li,Jing You
Fipronil has been frequently detected in waterways worldwide at concentrations that threaten aquatic organisms, yet the metabolic behavior of fipronil enantiomers in aquatic organisms is largely unknown, which is of significance in enantioselective toxicity evaluation. We quantitatively identified the specific cytochrome P450 (CYP) isozymes involved in metabolizing fipronil enantiomers in tilapia by combining in vitro metabolic kinetic assays and molecular docking. Inhibition studies suggested that CYP1A enzyme was the main isoform catalyzing metabolism of fipronil and that CYP3A contributed in a limited way to the metabolism in fish liver S9. Both the dissipation rate constant and the maximum metabolic velocity of R -(−)-fipronil were greater than those of S -(+)-fipronil in tilapia liver S9, suggesting that tilapia selectively metabolized R -(−)-fipronil. The CYP1A1 isozyme exhibited the highest binding capacity to R -(−)-fipronil and S -(+)-fipronil (binding energy ‒9.39 and ‒9.17 kcal/mol, respectively), followed by CYP1A2 (‒7.30 and ‒6.94 kcal/mol, respectively) and CYP3A4 (‒7.16 and ‒6.91 kcal/mol, respectively). The results of in vitro metabolic assays and molecular docking were consistent, that is, CYP1A, specifically CYP1A1, exhibited a higher metabolic capacity to fipronil than CYP3A, and fish liver S9 selectively metabolized R -(−)-fipronil. The present study provides insight into the enantioselective metabolic behavior and toxicological implications of the in vitro metabolic kinetics of fipronil in fish. Environ Toxicol Chem 2022;41:230–239. © 2021 SETAC
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2021
·
IF 5.302
Jian Yang,Yu Cong,Junrong Ling,Wentao Xu,Ye Zhang,Youfu Zhou,Maochun Hong
Aluminum oxynitride (AlON) powders were synthesized by a novel carbothermal reduction and nitridation (CRN) method. Homogenous and fluffy AlOOH/C core-shell nanoparticle precursor was hydrothermally synthesized with aluminum nitrate hydrate, sucrose and urea as starting materials. Then single-phase AlON powders were synthesized by CRN method at 1700 °C for 2 h. The phase transition and growth of Al 2 O 3 particles was effectively retarded by the amorphous carbon nano-layers on the surface of precursor, resulting in significantly lower reaction temperature and further smaller particle size. Based on above fine AlON raw material, transparent AlON ceramic was prepared by pressureless sintering at 1880 ℃ with the in-line transmittance above 80 %.
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JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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2021
·Vol. 97
·期 1
·240-253
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IF 3.174
Zhihang Huang,Songyuan Hao,Hong Yuan
BACKGROUND A novel double acid site solid catalyst (Al-OCS-0.1) having an ordered mesoporous structure was synthesized by grafting sulfonic acid groups on an oxidized ordered mesoporous carbon (OOMC) support and loading 10% Al 2 (SO 4 ) 3 . RESULT Assessments using Field emission scanning electron microscopy, Transmission electron microscopy and X-ray diffraction showed that the OMC structure remained unchanged after the chemical modification and Al 2 (SO 4 ) 3 loading. The Brunauer–Emmett–Teller surface area and average pore size of Al-OCS-0.1 decreased to 181 m 2 g −1 and 7.1 nm after loading Al 2 (SO 4 ) 3 , respectively. Ammonia temperature-programmed desorption (NH 3 -TPD) and Pyridine adsorption infrared spectroscopy (Py-IR) demonstrated that Al-OCS-0.1 had abundant Brønsted and Lewis acid sites. The ammonia desorption of Al-OCS-0.1 increased from 2.0 to 7.2 mmol g −1 after loading Al 2 (SO 4 ) 3 . CONCLUSION The Al-OCS-0.1 was used to catalyze the synthesis of ethyl levulinate from cellulose in ethanol and gave an extremely high yield of 50.8 mol% after 5 h at 200 °C. © 2021 Society of Chemical Industry (SCI).
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高影响因子
JOURNAL OF DENTISTRY
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2021
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IF 4.379
Rui Guo,Wenan Peng,Hongye Yang,Chenmin Yao,Jian Yu,Cui Huang
Objectives This paper aimed to evaluate the influence of resveratrol-doped adhesive on the durability and antibiofilm capability of dentin bonding . Methods Experimental adhesives were prepared by incorporating resveratrol into a universal adhesive at concentrations of 0 (control), 0.1, 1, and 10 mg/mL. The microtensile bond strength, fracture modes, and adhesive–dentin interface nanoleakage were assessed after 24 h of water storage, 10,000 times of thermocycling or 1-month of collagenase ageing. Relevant antibiofilm capability on Streptococcus mutans ( S. mutans ), in situ zymography , degree of conversion, and cytotoxicity of resveratrol-doped adhesives were also determined. Results Irrespective of thermocycled or collagenase ageing, the resveratrol-doped adhesive (1 mg/mL) maintained the bond strength and reduced the nanoleakage expression. Meanwhile, the inhibitory ability on endogenous protease activity and S. mutans biofilm formation with acceptable biocompatibility were obtained. Conclusions This study suggested that the resveratrol-doped adhesive achieved effective improvement on dentin bond durability and secondary caries management. Clinical significance The application of the resveratrol-doped adhesive indicates promising benefits to increase the lifetime of composite restorations.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
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IF 4.539
Yuxuan Zhao,Lingzhi Nie,Hongli Yang,Kai Song,Huilin Hou
In present work, we report the fabrication of mesoporous TiO 2 /In 2 O 3 nanofibers photocatalyst via the combination of electrospinning and hydrothermal method , in which In 2 O 3 were uniformly grown on electrospun TiO2 nanofibers. The mass loading of In 2 O 3 nanostructures and mesoporous nanostructure could be easily controlled by adjusting raw materials weight of In 2 O 3 within the hydrothermal solutions. The as-prepared photocatalyst were also employed to study their photocatalytic performance for organic decomposition. It is found that TiO 2 /In 2 O 3 composites showed significantly enhanced photocatalytic efficiency as compared to that of pristine TiO 2 and In 2 O 3 photocatalysts for RhB degradation. The enhanced performance could be attributed to the combined effects of the extended visible-light response range, efficient separation of photo-excited charge carriers and increased reaction active sites.
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高影响因子
Nanoscale
·
2021
·Vol. 13
·期 47
·20078-20090
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IF 7.79
Kai Zhang,Zhonghui Zhuo,Guorong Fan,Zongde Wang,Shangxing Chen,Lulu Xu,Yangping Wen,Peng Wang
The simultaneous detection of multiple biological small molecules is critical for human health evaluation and disease prevention. In this study, a nano-ZnS decorated hierarchically porous carbon (ZSHPC) electrocatalyst with multiple enzyme-like activities as a nanozyme sensing platform for simultaneous derivative voltametric detection of four important biological small molecules, dopamine (DA), uric acid (UA), guanine (G), and adenine (A), is successfully synthesized via an in situ hydrothermal reaction using leaves of Cinnamomum camphora (L.) after the extraction of essential oil as a carbon source, ZnCl2 as both zinc source and an activator, sulfuric acid as a sulfur source, and silica gel as a hard template. Activator together with the introduction of silica gel is beneficial for tuning pore structure. The in situ synthesized ZnS nanoparticles and sulfur doping improve the conductivity and cycling stability of the material. The ZSHPC electrode with multiple enzyme-like activities and oxidase-like characteristics was employed for the simultaneous detection of multiple target molecules in linear ranges of 0.3–500 μM with detection limits of 0.12 μM for DA, 0.26 μM for UA, 0.07 μM for G, and 0.075 μM for A. A derivative technique was selected for enhancing the peak resolution of the partial overlapped voltammograms and eliminating human error. Both the coefficient of determination and residual prediction deviation were used to evaluate this technique.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 46
·期 2
·877-882
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IF 3.591
Pengfei Fan,Can Liu,Congcong Hu,Feifei Li,Xi Lin,Fubing Xiao,Hao Liang,Le Li,Shengyuan Yang
Nitrogen and sulfur co-doped carbon dots (N,S-CDs) with strong orange fluorescence were fabricated through a facile hydrothermal method using o-phenylenediamine and thiourea as precursors. The N,S-CDs exhibited excitation-independent photoluminescent behavior with excellent stability. The largest emission peak at 565 nm occurred at an excitation wavelength of 420 nm, and the quantum yield (QY) was 14.3%. It was found that the absorption spectra of vitamin B12 (VB12) overlaps with the emission peak of the N,S-CDs to a large extent, and based on the inner filter effect (IFE) between VB12 and N,S-CDs, a label-free and sensitive detection method of VB12 in drugs was established. Under optimal conditions, the concentration of VB12 exhibited a satisfactory linear correlation with the fluorescence quenching degree ΔF/F0 of the reaction system at 565 nm in the range of 0.25–20 μM, and the detection limit was 77.5 nM. The N,S-CDs with orange fluorescence emission show huge potential for use in the field of biological analysis.
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LWT-FOOD SCIENCE AND TECHNOLOGY
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2021
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IF 4.952
Yaru Han,Linpin Luo,Liang Zhang,Yi Kang,Hao Sun,Jie Dan,Jing Sun,Wentao Zhang,Tianli Yue,Jianlong Wang
Nanozymes have become a frontier of research recently and possess broad application prospects in the field of analytical sensing. Herein, a Fe–Mn bimetallic nanozyme (FeMnzyme) was proposed for colorimetric analysis of ascorbic acid (AA). The FeMnzyme, with high specific surface area, consisted of Fe–Mn mixed oxide amorphous core and α-FeOOH nanorod shell characterized by scanning electron microscope (SEM) and Powder X-ray diffraction (XRD). It exhibits typical oxidase-like properties to catalyze oxidation of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to generate visible blue oxidized TMB (oxTMB) without exogenous H 2 O 2 . Due to the reducibility of AA to oxTMB, the FeMnzyme/oxTMB system can be employed as a promising colorimetric sensor for quantitative analysis of AA. The method has a good linear concentration range of 8 μmol L −1 to 56 μmol L −1 , and the detection limit is as low as 0.88 μmol L −1 (3σ). Finally, the proposed biosensor has been favorably put into use to determine AA content in kiwi fruit, indicating its reliability for practical application.
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