Biomass Conversion and Biorefinery
·
2023
·
IF 4
Si Lin,Hou Juying,Lv Wei,Hou Qin,Xu Zhixiang,Ai Shiyun
In this paper, lignocellulose components were separated under mild conditions to achieve hierarchical utilization of biomass. Cellulose was retained in cellulose pulp with highly crystalline structure, and lignin powder was recovered, which offered a possibility for the high-value utilization of lignocellulosic biomass. The extracted lignin (EL) was carbonized and activated to prepare lignin-based porous carbon microspheres (LPCMs) and further used as a substrate to interact with fluorescein-5-isothiocyanate (5-FITC) for the detection of biogenic amines (BAs). The fluorescence of 5-FITC was found to be quenched in the presence of LPCMs. And then, upon addition of BAs, 5-FITC was released from the surface of LPCMs, which resulted in the fluorescence recovery of 5-FITC. Thus, a novel “turn off–on” fluorescent probe was constructed for sensitive and visual detection of BAs. Meanwhile, the retained cellulose skeleton structure was used to prepare a smart identification label for real-time and visual evaluation of the freshness of pork and shrimp. This work realized the improvement of comprehensive utilization rate of lignocellulose and developed a rapid, efficient, and sustainable method which combined natural lignocellulose materials with green analytical technology for visually evaluating food quality.
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Nano Research
·
2023
·Vol. 16
·期 10
·12106-12115
·
IF 9.9
Wang Siqi,Jin Yao,Ai Wenhui,Wang Xiufeng,Zhang Zhiqing,Zhou Ting,Zhang Guodong,Wang Fang
Unexpected benefits to the catalytic performance of materials often originate from the presence of surface defects. Here, novel D-penicillamine modified molybdenum oxide nanodots, with abundant oxygen vacancy defects, were fabrication by a mild, simple, and cost-effective method. Ultraviolet—visible (UV—Vis) absorption spectra analysis showed that the nanodots had peroxidase-like and catalase-like activities. The reactive oxygen species were probed by electronic paramagnetic resonance technique and spectroscopic methods, demonstrating that the nanodots also had oxidase-like activity. Interestingly, the peroxidase-like activity of nanodots was synergistically enhanced in the presence of ferrous ions or ferric ions. Remarkably, less than nanomolar levels of ferrous ions were required to display this phenomenon, meaning Fenton reagent acted as leverage. Based on this, a sensitive colorimetric and fluorescent dual-mode sensor for alendronate sodium was developed. The linear ranges for colorimetric and fluorescence analysis were 0.2–2.5 and 0.2–2.0 µM, with detection limits of 31.21 and 71.84 nM, correspondingly. The method has a simple large-scale material preparation process with higher sensitivity and shorter reaction time, which can inspire and enlighten the design of nanozyme sensors.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 16
·48048-48061
·
IF 5.8
Xu Hao,Ou Yangyuan,Hu Xinjiang,Chen Daihui,Li Xingong,Tang Chunfang,Zheng Xia
Hydrothermal carbonation carbon (HTCC) is a promising semiconductor material for the photocatalytic degradation of pollutants. However, the poor charge transfer capability of HTCC and the unclear mechanism of photocatalysis limit its practical application. In this study, a novel Z-type heterojunction photocatalyst of silver carbonate (Ag 2 CO 3 ) and HTCC (Ag 2 CO 3 /HTCC) was developed for the degradation of methylene blue (MB) and tetracycline (TC) from wastewater using a hydrothermal- coprecipitation method. Compared to Ag 2 CO 3 and HTCC, 40% Ag 2 CO 3 /HTCC had excellent photocatalytic activity and stability. The free radical scavenger experiments showed that •O 2 − and h + were the main substances for the degradation of MB and TC. The intermediates formed during the photodegradation were identified by HPLC–MS, and a possible mechanism and pathway for the degradation of MB and TC by Ag 2 CO 3 /HTCC was proposed. This study provides a new idea for the synthesis of Z-type HTCC heterojunction with a high-photocatalytic efficiency and its photocatalytic mechanism.
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Nature Photonics
·
2023
·Vol. 17
·期 4
·346-353
·
IF 35
Liang Wenfei,Nie Chengming,Du Jun,Han Yaoyao,Zhao Guohui,Yang Fan,Liang Guijie,Wu Kaifeng
Near-infrared-to-visible photon upconversion holds great promise for a diverse range of applications. Current photosensitizers for triplet-fusion upconversion across this spectral window often contain either precious or toxic elements and have relatively low efficiencies. Although colloidal nanocrystals have emerged as versatile photosensitizers, the only family of nanocrystals discovered for near-infrared upconversion is the highly toxic lead chalcogenides. Here we report zinc-doped CuInSe 2 nanocrystals as a low-cost and lead-free alternate, enabling near-infrared-to-yellow upconversion with an external quantum efficiency reaching 16.7%. When directly merged with photoredox catalysis, this system enables efficient near-infrared-driven organic synthesis and polymerization, which in turn solves the issue of reabsorption loss for nanocrystal-sensitized upconversion. Moreover, the broadband light capture of these nanocrystals enables very rapid reactions under indoor sunlight. Extending the reach of ‘solar synthesis’ into the near-infrared may realize the century-long dream of conducting high-added-value chemical transformations using sunlight.
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POLYMER BULLETIN
·
2023
·Vol. 80
·期 12
·13243-13261
·
IF 3.2
Tian Xiuzhi,Bai Haozhe,Chen Ting,Sang Shen,Deng Haibo,Jiang Xue
The electronic packaging materials are important part in electronic devices and logically become main plastic composition in electronic wastes, which are over 50 million tons annually and caused serious environmental pollution. The biodegradable polymers are excellent candidates for the environment-friendly electronic packaging material, but they are hardly thermal conductive. Thus, improving thermal conductivity of the environment-friendly polymers is the key problem of the development of novel electronic packaging materials. Two typical bio-based, biocompatible and biodegradable polyesters such as poly(lactic acid) (PLA) and poly (butylene succinate) (PBS) were complexed with boron nitride nanosheets (BNNSs), which was ionic-liquid-exfoliated from hexagonal BN, to prepare a series of PBS/BNNS and PLA/PBS/BNNS composites. The chemical structure and morphology of the composites are investigated, which proved the adsorption of ionic liquid on BNNS. The experimental results show that BNNS nanosheets are evenly dispersed in PBS and PLA/PBS matrix, and the compatibility and dispersion in PLA/PBS composite matrix are improved. The thermal conductivity of the polymer composites was increased from about 0.2 W/(m*K) of PLA or PBS to 3.52 W/(m*K) of the composites with 30% of BNNS. The flame retardancy was improved as well. These performance characteristics of composite materials provide new development ideas for future electronic packaging materials and conform to the concept of green development.
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Journal of Orthopaedic Surgery and Research
·
2023
·Vol. 18
·期 1
·1-15
·
IF 2.6
Lin Yuan,Dai Hanhao,Yu Guoyu,Song Chao,Liu Jun,Xu Jie
ObjectiveOsteoporosis is a progressive systemic skeletal disorder. Multiple profiling studies have contributed to characterizing biomarkers and therapeutic targets for osteoporosis. However, due to the limitation of the platform of miRNA sequencing, only a part of miRNA can be sequenced based on one platform.Materials and methodsIn this study, we performed miRNA sequencing in osteoporosis bone samples based on a novel platform Illumina Hiseq 2500. Bioinformatics analysis was performed to construct osteoporosis-related competing endogenous RNA (ceRNA) networks. Gene interference and osteogenic induction were used to examine the effect of identified ceRNA networks on osteogenic differentiation of human bone marrow-derived mesenchymal stem cells (HBMSCs).Results miR-1303 was lowly expressed, while cochlin (COCH) and KCNMA1-AS1 were highly expressed in the osteoporosis subjects. COCH knockdown improved the osteogenic differentiation of HBMSCs. Meanwhile, COCH inhibition compensated for the suppression of osteogenic differentiation of HBMSCs by miR-1303 knockdown. Further, KCNMA1-AS1 knockdown promoted osteogenic differentiation of HBMSCs through downregulating COCH by sponging miR-1303.Conclusion sOur findings suggest that the KCNMA1-AS1/miR-1303/COCH axis is a promising biomarker and therapeutic target for osteoporosis.
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FOOD SCIENCE AND BIOTECHNOLOGY
·
2023
·Vol. 32
·期 8
·1039-1047
·
IF 2.9
Ye Yang,Deng Wenxin,Li Anjiao,Wu Yingting,Yuan Xianling,Wang Yang
Choerospondias axillaris, snow pear, and apple composite fruit puree can be affected by non-enzymatic browning during storage decreasing the market value of the product. This study aimed to explore, using kinetic methods, the effects of non-enzymatic precursors (polyphenols and ascorbic acid) and intermediates (5-hydroxymethylfurfural) on fruit puree stored at 4 °C for 35 days. The results showed that ascorbic acid fitted the first-order reaction model, while the 5-hydroxymethylfurfural was consistent with the complex reaction model. Furthermore, the 5-hydroxymethylfurfural content was 1.53 ± 0.18 mg/L, (corresponding to an increase of 565%), and the ascorbic acid content was 0.88 ± 0.22 mg/100 g, (corresponding to a decrease of 98.5%). The results also demonstrated a change in the titratable acid, soluble solids, and pH of the fruit puree. Finally, the correlation results revealed a significant correlation between non-enzymatic browning and 5-hydroxymethylfurfural, titratable acid, and pH (p < 0.05). Overall, the results suggest that the Maillard reaction could be responsible for the non-enzymatic browning of fruit purees during storage.
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CELLULOSE
·
2023
·Vol. 30
·期 5
·3073-3082
·
IF 5.7
Wang Yanan,Zhao Hanyu,Huang Lijie,Chen Guangxue,Wei Zhehao,Mo Qi,Li Yishan,Wang Xiyue,Huang Chongxing,Chen Qifeng
Owing to unique physiochemical and biological properties as well as the ability to be combined with a wide variety of materials for both biocompatibility and hydrophilia, carboxymethyl cellulose (CMC) is an excellent choice as a carrier. Loading Chlorine dioxide (ClO 2 ) into biodegradable carrier for its good disinfection performance and high safety factors has attracted significantattention. Therefore, in this study, we used ClO 2 as a model drug, and a sustained-ClO 2 -gas-release gel was developed from degradable materials, such as carboxymethyl cellulose (CMC), polyvinyl alcohol (PVA), and β-cyclodextrin (βCD), through a simple and benign crosslinking strategy. Notably, the gel had sustained-release property in a wide temperature range of 4–35 ℃ and released ClO 2 gas effectively for more than 30 days. Furthermore, a loss factor was proposed based on the incomplete release of the drug in the sustained release process to a chieve a good fit with the gas diffusion process. A new diffusion model was designed based on the Korsmeyer–Peppas model, and an excellent fit was obtained. This sustained-ClO 2 -gas-release gel provides theoretical and technical guidance for the development of sustained-disinfectant-release agents for use in space and offers new insights into the sustained release model of skeleton-soluble hydrogels. Graphical abstract
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-11
·
IF 16.6
Li Mubai,Sun Riming,Chang Jingxi,Dong Jingjin,Tian Qiushuang,Wang Hongze,Li Zihao,Yang Pinghui,Shi Haokun,Yang Chao,Wu Zichao,Li Renzhi,Yang Yingguo,Wang Aifei,Zhang Shitong,Wang Fangfang,Huang Wei,Qin Tianshi
Incorporating mixed ion is a frequently used strategy to stabilize black-phase formamidinum lead iodide perovskite for high-efficiency solar cells. However, these devices commonly suffer from photoinduced phase segregation and humidity instability. Herein, we find that the underlying reason is that the mixed halide perovskites generally fail to grow into homogenous and high-crystalline film, due to the multiple pathways of crystal nucleation originating from various intermediate phases in the film-forming process. Therefore, we design a multifunctional fluorinated additive, which restrains the complicated intermediate phases and promotes orientated crystallization of α-phase of perovskite. Furthermore, the additives in-situ polymerize during the perovskite film formation and form a hydrogen-bonded network to stabilize α-phase. Remarkably, the polymerized additives endow a strongly hydrophobic effect to the bare perovskite film against liquid water for 5 min. The unencapsulated devices achieve 24.10% efficiency and maintain >95% of the initial efficiency for 1000 h under continuous sunlight soaking and for 2000 h at air ambient of ~50% humid, respectively.
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-10
·
IF 16.6
Zhao Weiwei,Ni Hao,Ding Chengbo,Liu Leilei,Fu Qingfeng,Lin Feifei,Tian Feng,Yang Pin,Liu Shujuan,He Wenjun,Wang Xiaoming,Huang Wei,Zhao Qiang
Flexible titanium carbide (Ti 3 C 2 ) antenna offers a breakthrough in the penetration of information communications for the spread of Internet of Things (IoT) applications. Current configurations are constrained to multi-layer complicated designs due to the limited conformal integration of the dielectric substrate and additive-free Ti 3 C 2 inks. Here, we report the flexible ultrawideband Ti 3 C 2 monopole antenna by combining strategies of interfacial modification and advanced extrusion printing technology. The polydopamine, as molecular glue nano-binder, contributes the tight adhesion interactions between Ti 3 C 2 film and commercial circuit boards for high spatial uniformity and mechanical flexibility. The bandwidth and center frequency of Ti 3 C 2 antenna can be well maintained and the gain differences fluctuate within ±0.2 dBi at the low frequency range after the bent antenna returns to the flat state, which conquers the traditional inelastic Cu antenna. It also achieves the demo instance for the fluent and stable real-time wireless transmission in bending states.
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IONICS
·
2022
·Vol. 29
·期 2
·685-693
·
IF 2.961
Li Jinyun,Li Wenwen,Deng Guoxiong,Qin Ying,Wang Hongyan,Wang Yunjia,Xue Song
Cuprous oxide (Cu 2 O) is a promising photocathode for photo-electrochemical hydrogen production. One of the main issues limiting the application of Cu 2 O is photo-corrosion in aqueous electrolyte during the PEC process. Herein, to improve the stability of Cu 2 O, for the first time, a soluble polymer polyimide (PI) was introduced as a protective layer using a facile spin-coating method. It was found that dense PI films effectively isolated Cu 2 O from the aqueous electrolyte and inhibited self-reduction and oxidation reactions of Cu 2 O as evidenced by XRD spectra. Compared with bare Cu 2 O, the photocurrent density and stability of modified Cu 2 O samples were increased with increasing the spin-coating amount of PI solutions. It was found that sample Cu 2 O/PI-200 showed the highest current density value of 1.8 mA/cm 2 at 0 V RHE after 1200 s without attenuation, which is 40 times higher than the bare Cu 2 O (0.04 mA/cm 2 at 0 V RHE ). Further enhancing the PI amount, such as sample Cu 2 O/PI-300, will lead to a very stable but lower current density (1.48 mA/cm 2 ) during the whole test duration. EIS measurements indicated that thicker PI films lead to larger charge transfer resistance and higher capacitance in the space charge layer. Therefore, there is an optimum amount of PI (Cu 2 O/PI-200) to balance the above two opposite effects and achieve the best PEC performance. This work provides a facile strategy to improve the PEC activity and stability of Cu 2 O, which may be extended to other systems with photo-corrosion problems, such as BiVO 4 or ZnO.
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MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 12
·1-10
·
IF 6.408
Dai Yin,Jiang Wei,Zheng Yani,He Pei,Zhu Ruizhi,Fei Jianwen,Xu Wei,Liu Chunbo,Hong Junli
A selective method for the determination of myosmine (a tobacco alkaloid) was developed using molecularly imprinted polymers (MIPs) based on Fe 3 O 4 @SiO 2 and PAMAM dendrimers. Fe 3 O 4 @SiO 2 with excellent magnetism and rapid separation performance was chosen as carrier for the MIPs. Moreover, the MIPs modified with PAMAM dendrimers exhibited a regular structure and abundant functional groups, which improve the efficiency of imprinting sites. The myosmine concentration was measured by HPLC with PDA detector, and the UV detection wavelength was set to 200 nm. The linear range of this assay was 13.2–400 mg/L with a correlation coefficient of 0.999, and the detection limit was 4.0 mg/L (S/N = 3). The MIPs have been used for the determination of myosmine in cigarettes, and the recovery range was 84.2–93.5%, with RSD values in the range 0.41–3.1%. In conclusion, our MIPs combine advantages of simple preparation and remarkable selectivity, which gives them excellent application prospects for the sensitive determination of trace myosmine in tobacco products. Graphical abstract
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