JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2022
·Vol. 52
·期 11
·1607-1616
·
IF 2.925
Zhang Yi,Zhang Liwen,Gong Tingcui,Li Tianhao,Li Xuenuan,Feng Jun,Tang Tingfan,Cheng Hao
Due to the highly porous structure, metal organic framework (MOF)-derived materials are extensively applied in the field of electroanalysis. In this experiment, an effective electrochemical sensing based on Co 3 O 4 /C-derived ZIF-67 MOF had been constructed for ultrasensitive determination of quercetin at trace level. The resultant Co 3 O 4 /C porous polyhedron of morphology and nanostructure were carefully examined using transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Brunauer–Emmett–Teller (BET) techniques. Differential pulse anodic stripping voltammetry (DPV) method was adopted to analyze quercetin under the optimized conditions. The DPV response of Co 3 O 4 /C film-coated glass carbon electrode (Co 3 O 4 /C/GCE) for quercetin determination was achieved a long linearity ranging from 0.5 to 30 µM, achieving high sensitivity about 1.830 × 10 − 6 A cm − 2 µM − 1 , and the detection limit was calculated to be 0.022 µM (S/N = 3). Besides, the fabricated Co 3 O 4 /C/GCE displayed excellent selectivity, desirable repeatability, and good reproducibility. More importantly, the proposed sensor exhibited satisfactory recovery ranges and accuracy for the determination of trace quercetin in human urine and serum samples, which will make it as an alternative advantageous choice for practical on-site determination. Graphical abstract
The porous Co 3 O 4 /C polyhedron derived by ZIF-67 MOF was successfully synthesized.
The as-synthesized material was employed to prepare chemically modified electrode
for ultrasensitive determination of quercetin. Then the Co 3 O 4 /C-modified glass carbon electrode is displayed good sensitivity and accuracy toward quercetin in urine and
serum samples.
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CHINESE JOURNAL OF POLYMER SCIENCE
·
2022
·Vol. 40
·期 10
·1183-1192
·
IF 3.815
Zhang Hong-Ming,Han Guang-Ping,Cheng Wan-Li,Liu Shun-Jie,Wang Xian-Hong
High solid content CO 2 -based cationic waterborne polyurethanes (CWPUs) were prepared using CO 2 -polyols as soft segment and N -methyl diethanolamine (MDEA) as hydrophilic group. The resulting stable aqueous dispersion displayed a high solid content of 52% with a low MDEA loading of 3.52 wt%. This novel structural CWPU can provide excellent adhesive strength, whose T-peel strength could reach 173.48 N/5cm, 20% higher than that of ester-based cationic waterborne polyurethane (87.55 N/5cm). The CO 2 -based CWPU film showed only 2 wt% swelling percentage after 240 min immersion in water, and no change was observed during its immersion in 5 wt% sodium hydroxide solution. The tensile strength of CO 2 -WPUs dropped slowly to 91.2% after 480 min immersion in a 5 wt% sodium hydroxide solution, whereas that of ester-based CWPUs dropped quickly to 32% after 240 min and their mechanical properties were lost after 360 min immersion. Meanwhile, the retention of the tensile strength of the CO 2 -CWPUs was 81.5% even after 720 min immersion in 10 wt% H 2 O 2 solution, while it was only ca . 38% for the ester-based CWPUs. These results indicated that the cationic CO 2 -based CWPU may be promising waterborne adhesive with outstanding ageing resistance due to its synergistic effect from carbonate and ether groups of CO 2 -polyol structure.
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Nano Research
·
2022
·Vol. 16
·期 5
·6057-6066
·
IF 10.269
Zhao Man,Cheng Xiaoru,Xiao He,Gao Jianru,Xue Shoufeng,Wang Xiaoxia,Wu Haishun,Jia Jianfeng,Yang Nianjun
Highly active, stable, and cut-price (photo-)electrocatalysts are desired to overwhelm high energy barriers for anodic oxygen evolution reaction processes. Herein, a heterostructure of cobalt-iron oxide/black phosphorus nanosheets is in-situ synthesized via a facile and novel three-electrode electrolysis method. Bulky black phosphorus is exfoliated into its nanosheets at the cathode while the CoFe oxide is derived directly from the metal wire anode during the electrolysis process. This heterostructure exhibits excellent electrocatalytic oxygen evolution reaction (OER) performance, and the overpotential at 10 mA·cm −2 is 51 mV lower than that of the commercial RuO 2 catalyst. Its superior OER performance stems from the favorable adsorption behavior and an enlarged electrochemical active surface area of the catalyst. To reveal the origin of excellent OER performance from the point of adsorption strength of OH*, methanol oxidation reaction (MOR) test is applied under the identified OER operating conditions. Further introduction of light illumination enhances the OER activity of this heterostructure. The overpotential drops down to 280 mV, benefiting from pronounced photochemical response of black phosphorus nanosheets and iron oxide inside the heterostructure. This work develops a new electrochemical method to construct high performance and light-sensitive heterostructures from black phosphorus nanosheets for the OER.
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Biomass Conversion and Biorefinery
·
2022
·
IF 4.05
Zhang Miao,Gao Jianchun,Shi En,Wang Xinyu,Wang Xin,Zheng Yunbin,Wang Shengnan
Sludge, a kind of carbon-rich material, can be produced as activated carbon. Mesoporous carbon derived from sludge has advantages in dye adsorption. However, most studies focus on the characteristic of surface area, pore volume, and pore size distribution but not the adsorption kinetics of mesoporous carbon. In this study, mesoporous carbon was prepared from anaerobic granular sludge through the molten salt method. The highest specific surface area can be 728.67 m 2 g −1 at calcination temperature of 500 °C and time of 2 h. The removal of methylene blue (MB) and methyl orange (MO) can be above 99% with the dye concentration of 40 mg L −1 . MB and MO adsorption experiment fitted well with pseudo-second-order kinetics. According to molecular dynamics simulation, the adsorption of MO on the surface of mesoporous carbon was easier than that of MB, while MB and mesoporous carbon system was stable. The frontier molecular orbital analysis was consistent with the experiment results. The sludge-derived activated carbon prepared by molten salt method had typical mesoporous structure and enhanced the dye adsorption.
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CELLULOSE
·
2022
·Vol. 29
·期 14
·7955-7972
·
IF 6.123
Wang Kaili,Liu Xiaorong,Dong Youming,Ling Zhe,Cai Yahui,Tian Dan,Fang Zhen,Li Jianzhang
Transparent wood (TW) with excellent optical and thermal management performance has been recently developed as a promising energy-efficient building material. Here, editable shape-memory TW (ESMTW) is developed through in situ polymerization of epoxy-based dynamic covalent polymers (EDCP) into a delignified wood scaffold. ESMTW possesses stiffness at low temperature and flexibility at high temperatures, while it exhibits excellent solid-state plasticity and shape-manipulation capability under thermal stimuli. Meanwhile, ESMTW shows unique light guiding and directional scattering effects, and the transmitted light intensity distribution is tunable owing to the shape-management capability. Additionally, the resultant TW possesses great thermal insulation properties. The combination of characteristics enables TW to exhibit great promise as an advanced functional and intelligent building material toward a sustainable society, especially for three-dimensional applications ( e.g. , curved or irregularly shaped glass, windows, ceilings, rooftops.). It may also provide new ideas for fabricating transparent and shape-editable optical/electronic devices. Graphical abstract
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JOURNAL OF NANOBIOTECHNOLOGY
·
2022
·Vol. 20
·期 1
·1-16
·
IF 9.429
Liu Qiqi,Zhang Ying,Huang Jingkai,Xu Zhourui,Li Xiang,Yang Jingyu,Huang Haoqiang,Tang Shiqi,Chai Yujuan,Lin Jinbo,Yang Chengbin,Liu Jia,Lin Suxia
The colonization of bacterial pathogens is a major concern in wound infection and becoming a public health issue. Herein, a core–shell structured Ag@MSN (silver core embedded with mesoporous silica, AM)-based nanoplatform was elaborately fabricated to co-load ciprofloxacin (CFL) and tumor necrosis factor-α (TNF-α) small interfering RNA (siTNF-α) (AMPC@siTNF-α) for treating the bacterial-infected wound. The growth of bacterial pathogens was mostly inhibited by released silver ions (Ag + ) and CFL from AMPC@siTNF-α. Meanwhile, the loaded siTNF-α was internalized by macrophage cells, which silenced the expression of TNF-α (a pro-inflammatory cytokine) in macrophage cells and accelerated the wound healing process by reducing inflammation response. In the in vivo wound model, the Escherichia coli (E. coli) -infected wound in mice almost completely disappeared after treatment with AMPC@siTNF-α, and no suppuration symptom was observed during the course of the treatment. Importantly, this nanoplatform had negligible side effects both in vitro and in vivo. Taken together, this study strongly demonstrates the promising potential of AMPC@siTNF-α as a synergistic therapeutic agent for clinical wound infections. Graphical Abstract
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PubMed
高影响因子
JOURNAL OF THERMAL SPRAY TECHNOLOGY
·
2022
·Vol. 31
·期 8
·2463-2475
·
IF 2.839
Liu Ji,Chen Tongzhou,Duan Haitao,Yuan Chengqing,Bai Xiuqin
Cavitation erosion is a major failure mode of hydraulic turbine components. Coatings could be an effective solution to this problem. In this study, a CeO2-modified (1 wt%) dual-scale WC-10Co-4Cr powder (WC composed of 70 wt% micrometer WC (2.5 μm) and 30 wt% nanometer WC (100 ~ 200 nm)) was fabricated by agglomeration and sintering. CeO2-modified dual-scale WC-10Co-4Cr coatings (C-coating), dual-scale WC-10Co-4Cr coatings (D-coating), and micrometer WC-10Co-4Cr coatings (M-coating) were then deposited using a high-velocity oxygen fuel (HVOF). The mechanical properties and cavitation erosion behavior of these coatings were studied. The results showed that the CeO2-modified WC-10Co-4Cr coatings could effectively reduce decarburization in the powder preparation and HVOF process, the coatings having the highest WC retention rate. The C-coatings possessed a higher fracture strength (6.3 MPa m 1/2 ) and hardness (1348.2 HV0.3) than the D-coatings by more than 8.6 and 3.0%, respectively. The cavitation erosion resistance of the WC-10Co-4Cr coatings was affected by their microstructure and mechanical properties. The CeO2-modified coatings exhibited improved fracture toughness and hardness, reduced porosity, and, as a result, the C-coatings had the best cavitation erosion resistance.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2022
·Vol. 414
·期 23
·6753-6760
·
IF 4.478
Zhang Huixin,Wang Lun,Zhuang Tingting,Wei Zhihao,Xia Jianfei,Wang Zonghua
Nanomaterial-derived quantum dots (QDs) are excellent electrochemiluminescence (ECL) luminophores and play an important role in optical sensing due to their excellent water solubility, good biocompatibility and tunable molecular size. In this work, a novel strategy was designed to form nano-hybrid Ti 3 C 2 QDs-AuNPs in situ as a luminophore based on the unique reducibility of Ti 3 C 2 QDs, which showed remarkable and stable ECL performance. Here, AuNPs were formed in situ without the addition of reducing agents and stabilizers, leading to threefold enhancement of the ECL signal of Ti 3 C 2 QDs due to their excellent charge transfer capability. Meanwhile, Ti 3 C 2 QDs-AuNPs with abundant Ti atoms also acted as recognition units. Through skillful combination with hybridization chain reaction (HCR) to expose more phosphate, an ECL platform was constructed to detect polynucleotide kinase (PNK) with good specificity and sensitivity. A lower limit of detection limit of 2.7×10 −5 U mL −1 was achieved, with a wide linear relationship ranging from 0.0001 to 10 U mL −1 . This novel strategy provides a guide for the application of nano-hybrid Ti 3 C 2 QDs-AuNPs as a luminophore in the field of ECL bioanalysis. Graphical abstract Novel in situ-formed nano-hybrid Ti 3 C 2 QDs-AuNPs were prepared as a luminophore, with threefold enhancement of the ECL signal of Ti 3 C 2 QDs.
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AUSTRALASIAN PLANT PATHOLOGY
·
2022
·Vol. 51
·期 5
·535-541
·
IF 1.4
AL-Kubati Asma Mohammed Saeed,Kang Baoshan,Abbas Aqleem,Kaseb Mohamed Omar,Gu Qinsheng
Cucumber green mottle mosaic virus (CGMMV) is a major threat to cucurbits-producing regions worldwide. Conventional breeding process takes much time to cross plants and to select a good variety. In contrast to conventional breeding, mutation breeding accelerates the process of cultivar development and increases variety within a crop species. Hence, the aim of this study was to develop bottle gourd lines that were resistant to CGMMV using Ethyl Methane Sulfonate (EMS) mutagenesis. By treating wild-type seeds (M0) with EMS, bottle gourd lines (M1) were produced. "M1" lines were self-pollinated; as a result, 303 "M2" families were obtained. From M2 families, a total of 2444 "M3" lines were obtained to screen resistance to CGMMV. The "M3" lines were then classified into 5 levels based on the development of symptoms 11–30 days post-inoculation, with very light symptoms 13.91%, light symptoms 34.0%, mild symptoms 33.71%, severe symptoms 4.62%, and death lines 4.62%, respectively. About 278 (11.38%) "M3" lines in glasshouse experiments showed no symptoms at 30 dpi. Using a double-antibody sandwich enzyme-linked immunosorbent assay at 60 dpi, 44 "M3" lines out of 278 were determined to be asymptomatic and negative for CGMMV. These lines were then transplanted in the field. Four of the 44 "M3" lines were asymptomatic in the field and tested negative for CGMMV using the DAS-ELISA. The new findings show that using EMS-induced mutations to create novel CGMMV highly resistant bottle gourd cultivars could be a viable option.
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CELLULOSE
·
2022
·Vol. 29
·期 15
·8293-8303
·
IF 6.123
Yue Shuangshuang,Wang Shuanjin,Han Dongmei,Huang Sheng,Xiao Min,Meng Yuezhong
A transparent perhydropolysilazane-derived-SiO x coated cellulose film with high gas barrier properties was fabricated via a facile solution dip-coating followed by UV curing method. The conversion of perhydropolysilazane to SiO x was proved by ATR-FTIR, XPS and TOF–SIMS characterizations. AFM and SEM images revealed the smoothness of the coating and good adhesion between the cellulose substrate and the coating. The thickness of the SiO x coating (50–450 nm) can be tuned by changing the concentration of the perhydropolysilazane precursor solution. The cellulose film (35 µm in thickness) with 450 nm thick SiO x coating exhibits low oxygen transmission rate (OTR) value of 0.82 cm 3 /m 2 ·day and water vapor transmission rate (WVTR) value of 1.28 g/m 2 ·day. The excellent oxygen and water vapor barrier properties, ultrahigh transparency and complete biodegradability of the SiO x coated cellulose film endow it competitive potential for packaging applications. Graphical abstract A transparent perhydropolysilazane-derived-SiO x layer is tightly coated on a cellulose film via a facile solution dip-coating followed by UV curing method. The sandwich structured cellulose-SiO x films show excellent oxygen and water vapor barrier properties as well as ultrahigh transparency and complete biodegradability, which has a great potential for food, medicine and other packaging applications.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2022
·Vol. 20
·期 1
·1-17
·
IF 9.429
Lu Yuan-Fei,Zhou Jia-Ping,Zhou Qiao-Mei,Yang Xiao-Yan,Wang Xiao-Jie,Yu Jie-Ni,Zhang Jin-Guo,Du Yong-Zhong,Yu Ri-Sheng
Background The efficacy of immune checkpoint blockade (ICB), in the treatment of hepatocellular carcinoma (HCC), is limited due to low levels of tumor-infiltrating T lymphocytes and deficient checkpoint blockade in this immunologically "cool" tumor. Thus, combination approaches are needed to increase the response rates of ICB and induce synergistic antitumor immunity.Methods Herein, we designed a pH-sensitive multifunctional nanoplatform based on layered double hydroxides (LDHs) loaded with siRNA to block the intracellular immune checkpoint NR2F6, together with the asynchronous blockade surface receptor PD-L1 to induce strong synergistic antitumor immunity. Moreover, photothermal therapy (PTT) generated by LDHs after laser irradiation modified an immunologically “cold” microenvironment to potentiate Nr2f6-siRNA and anti-PD-L1 immunotherapy. Flow cytometry was performed to assess the immune responses initiated by the multifunctional nanoplatform.Results Under the slightly acidic tumor extracellular environment, PEG detached and the re-exposed positively charged LDHs enhanced tumor accumulation and cell uptake. The accumulated siRNA suppressed the signal of dual protumor activity in both immune and H22 tumor cells by silencing the NR2F6 gene, which further reduced the tumor burden and enhanced systemic antitumor immunity. The responses include enhanced tumor infiltration by CD4+ helper T cells, CD8+ cytotoxic T cells, and mature dendritic cells; the significantly decreased level of immune suppressed regulator T cells. The therapeutic responses were also attributed to the production of IL-2, IFN-γ, and TNF-α. The prepared nanoparticles also exhibited potential magnetic resonance imaging (MRI) ability, which could serve to guide synergistic immunotherapy treatment.Conclusion sIn summary, the three combinations of PTT, NR2F6 gene ablation and anti-PD-L1 can promote a synergistic immune response to inhibit the progression of primary HCC tumors and prevent metastasis. This study can be considered a proof-of-concept for the targeting of surface and intracellular immune checkpoints to supplement the existing HCC immunotherapy treatments.
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高影响因子
Advanced Composites and Hybrid Materials
·
2022
·Vol. 5
·期 3
·1966-1975
·
IF 11.806
Zhu Huijie,Wang Yajie,Qu Muchao,Pan Yamin,Zheng Guoqiang,Dai Kun,Huang Mina,Alhadhrami A.,Ibrahim Mohamed M.,El-Bahy Zeinhom M.,Liu Chuntai,Shen Changyu,Liu Xianhu
Daytime radiative cooling materials have recently attracted tremendous interest by reflecting sunlight and radiating heat to the ultracold outer space without any energy consumption. While some progress has been made, it remains a big challenge in fabricating highly efficient, low-cost, biodegradable, and sustainable all-day radiative coolers. Here, we report a hierarchically structured poly(vinyl alcohol)/silica film via a facile electrospinning method. The diameters of the electrospun fibers range from several nanometers to several microns, and the silica particles distribute across the surface randomly. The optimal film exhibits sufficiently high solar reflectance (97%) and superior longwave infrared thermal emittance (95%), thus realizing sub-ambient cooling of ~ 9.3 °C during the night and ~ 4.5 to ~ 7.5 °C during the midday under the solar intensity of ~ 700 W/m 2 . Overall, this film demonstrates high performance of daytime radiative cooling, with an inexpensive and environmental production way compared to those of state-of-the-art designs. Graphical abstract
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危险品化学品经营许可证（带存储）