ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Wenjie Chen,Li Xie,Can Lv,Erqun Song,Xiaokang Zhu,Yang Song
Ferroptosis, an iron-dependent cell death driven by the lethal levels of lipid peroxidation (LPO), becomes a promising anticancer strategy. However, the anticancer efficacy of ferroptosis is often hindered by the activation of nuclear factor erythrocyte 2-associated factor 2 (Nrf2), which is an indispensable regulator of the cellular antioxidant balance by preventing the accumulation of intracellular reactive oxygen species (ROS). Herein, we present a rational design of a Tf-targeted cascade nanoplatform TPM@AM based on mesoporous polydopamine (MPDA) co-encapsulating a ferroptosis inducer (artesunate, ART) and an Nrf2-specific inhibitor (ML385) to enhance intracellular ROS and therefore amplify ferrotherapy. Transferrin (Tf) can specifically recognize the transferrin receptor (TfR) on the surface of the cell membrane, which binds and transports iron into cells. When TPM@AM is endocytosed, the high-acid tumor microenvironment and laser irradiation trigger the collapse of MPDA to release ART and ML385. Furthermore, MPDA endows the nanoplatform with photothermal capability. The nanoplatform exhibits high efficiency for synergistic tumor suppression, representing a spatiotemporal controllable therapeutic strategy for precise synergistic cancer therapy.
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高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Wanjiao Li,Jing Li,Hui Li,Feng Hu,Jingcai Xu,Bo Hong,Yunxiong Zeng,Xinqing Wang,Hongliang Ge,Xiaoling Peng
FeSiCr soft magnetic composites (SMCs) with yttrium iron garnet (YIG) coating layer were studied in this work. The YIG with nano size was synthesized by reverse co-precipitation method, which was coated on FeSiCr powders with different YIG contents. The effect of the annealing temperature on the FeSiCr/YIG SMCs was also investigated. It was found that a moderate amount of YIG ferrite could form a thin and uniform layer, resulting in significant optimizations in core loss, permeability, and DC bias characteristics. The results show that the FeSiCr/YIG SMCs with 0.75 wt% YIG exhibit the best magnetic performance ( P cv = 131.34 mW/cm 3 , μ e = 44.5 at 10 mT and 500 kHz). In addition, it was demonstrated that the FeSiCr/YIG SMCs with 0.75 wt% YIG presented the lowest core loss and largest permeability at the optimal annealing temperature of 500 °C. This study provides a new kind of FeSiCr/YIG SMCs which have good prospects to be used in high-frequency fields.
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Journal of Environmental Sciences
·
2023
·
IF 6.9
Xiang Zhang,Yunpeng Huang,Jikun Wang,Jie Tang,Yang Mei,Nali Zhu,Zhigang Li,Lingxiangyu Li,Yawei Wang
The nanoscale zinc oxide (n-ZnO) was used in food packages due to its superior antibacterial activity, resulting in potential intake of n-ZnO through the digestive system, wherein n-ZnO interacted with saliva. In recent, facet engineering, a technique for controlling the exposed facets, was applied to n-ZnO, whereas risk of n-ZnO with specific exposed facets in saliva was ignored. ZnO nanoflakes (ZnO-0001) and nanoneedles (ZnO-1010) with the primary exposed facets of {0001} and {1010} respectively were prepared in this study, investigating stability and toxicity of ZnO-0001 and ZnO-1010 in synthetic saliva. Both ZnO-0001 and ZnO-1010 partially transformed into amorphous Zn 3 (PO 4 ) 2 within 1 hr in the saliva even containing orgnaic components, forming a ZnO-Zn 3 (PO 4 ) 2 core-shell structure. Nevertheless, ZnO-1010 relative to ZnO-0001 would likely transform into Zn 3 (PO 4 ) 2 , being attributed to superior dissolution of {1010} facet due to its lower vacancy formation energy (1.15 eV) than {0001} facet (3.90 eV). The toxicity of n-ZnO to Caco-2 cells was also dependent on the primary exposed facet; ZnO-0001 caused cell toxicity through oxidative stress, whereas ZnO-1010 resulted in lower cells viability than ZnO-0001 through oxidative stress and membrane damage. Density functional theory calculations illustrated that ·O 2 − was formed and released on {1010} facet, yet O 2 2− instead of ·O 2 − was generated on {0001} facet, leading to low oxidative stress from ZnO-0001. All findings demonstrated that stability and toxicity of n-ZnO were dependent on the primary exposed facet, improving our understanding of health risk of nanomaterials.
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高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 27
·14674-14681
·
IF 11.9
Huaikun Zhang,Wentao Wang,Zechuan Dai,Yin Zhu,Mingyu Cheng,Bocheng Zhang,Yafei Feng,Yangyang Zhang,Genqiang Zhang
Ru clusters have great potential as excellent bifunctional catalysts for the hydrogen evolution reaction (HER) and hydrazine oxidation reaction (HzOR), but suffer from the difficulty of stabilization on the substrate and tuning the electronic environment. Herein, we present Ru clusters supported on N, S co-doped hollow carbon spheres (Ru/NSCS) by elaborately designed Ru–S bonds to anchor Ru clusters and optimize the surrounding coordination environment. The Ru/NSCS exhibits superior electrocatalytic performance for the HER and HzOR, where an ultrasmall overpotential of 40 mV and a working potential of −81 mV at 10 mA cm−2 can be achieved, respectively. The two-electrode system requires an applied voltage of only 26 mV to achieve 10 mA cm−2 and remains stable for 20 hours. Theoretical calculations reveal that the Ru–S bonds induce partial charge transfer from Ru clusters to the N, S co-doped carbon base, thus optimizing the adsorption energy of *H and dehydrogenation intermediates of N2H4.
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OPTICAL MATERIALS
·
2023
·
IF 3.9
Vu Hoang Huong,Van-Can Nguyen,Minh Ngoc Ha,Duy Van Pham,Thanh Binh Nguyen,Yuan-Ron Ma,An Bang Ngac,Trinh Thi Loan
The photo-Fenton process serves as a highly efficient approach for removing contaminants from wastewater. In this study, we developed a Fe-doped TiO 2 /SnO 2 heterojunction catalyst to enhance the efficiency of photo-Fenton catalytic activity under visible light . To investigate the physical properties of the catalysts, various characterization techniques were utilized, including XRD , SEM, TEM , HR-TEM, UV-VIS, PL , and XPS . The 7% mol Fe-doped TiO 2 /SnO 2 -OVs (TFS-7) heterostructure exhibited the highest rate constant of 17.03 × 10 −3 min −1 ; 8.4 and 2.1 times higher than the individual components. This enhanced performance is mainly attributed to the rapid migration of photoinduced electrons to Fe 3+ and the subsequent generation of Fe 2+ , which improved electron transfer capacity and facilitated the rapid production of hydroxyl radicals (•OH) through the reaction between Fe 2+ and H 2 O 2 . We proposed a S-scheme mechanism for the Fe-doped TiO 2 /SnO 2 -OVs catalyst based on the analysis of reactive species trapping experiments, photoluminescence (PL) spectra, ultraviolet photoelectron spectroscopy (UPS), and density functional theory (DFT). These findings offer not only a straightforward approach for synthesizing highly active photocatalysts for the degradation of RhB dye, but also a framework for the construction of heterostructure photocatalysts.
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JOURNAL OF CHROMATOGRAPHY A
·
2023
·
IF 4.1
Zhen Wang,Wei Wang,Liquan Sun,Bo Tang,Fulai Zhang,Aiqin Luo
Herein, a chiral multishelled mesoporous carbon nanospheres (MCNs) with unique spiral multishelled hollow mesoporous chiral structure is synthesized; the MCNs can be used as stationary phases for high-resolution gas chromatography (GC) and have good separation capacity. The successful preparation of MCNs is verified by a variety of characterizations. In addition, the MCNs-coated capillary column shows excellent separation performance for n-alkanes, n-alcohols, aromatic compounds, and esters, and it has a faster analysis time than the HP-5 commercial capillary column. The chromatography separation performance for various isomers and racemates of the MCNs stationary phase was evaluated, and it showed good separation capability for amino acid derivatives. The MCNs-coated capillary column has been demonstrated to present good reproducibility and stability. In summary, all of the chromatography experiments in this work indicate that this new stationary phase of the MCNs has good application potential for GC capillary separation.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2023
·Vol. 24
·期 10
·8620
·
IF 5.6
Pingan Yang,Wenxian Ye,Haibo Ruan,Rui Li,Mengjie Shou,Yichen Yin,Xin Huang,Yuxin Zhang,Jiufei Luo
In this study, we successfully prepared core–shell heterostructured nanocomposites (Fe NWs@SiO2), with ferromagnetic nanowires (Fe NWs) as the core and silica (SiO2) as the shell. The composites exhibited enhanced electromagnetic wave absorption and oxidation resistance and were synthesized using a simple liquid-phase hydrolysis reaction. We tested and analyzed the microwave absorption properties of Fe NWs@SiO2composites with varied filling rates (mass fractions of 10 wt%, 30 wt%, and 50 wt% after mixing with paraffin). The results showed that the sample filled with 50 wt% had the best comprehensive performance. At the matching thickness of 7.25 mm, the minimum reflection loss (RLmin) could reach −54.88 dB at 13.52 GHz and the effective absorption bandwidth (EAB,RL <−10 dB) could reach 2.88 GHz in the range of 8.96–17.12 GHz. Enhanced microwave absorption performance of the core–shell structured Fe NWs@SiO2composites could be attributed to the magnetic loss of the composite, the core–shell heterogeneous interface polarization effect, and the small-scale effect induced by the one-dimensional structure. Theoretically, this research provided Fe NWs@SiO2composites with highly absorbent and antioxidant core–shell structures for future practical applications.Keywords:core–shell structure;Fe NWs@SiO2;microwave absorption
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Advanced Materials Technologies
·
2023
·Vol. 8
·期 15
·2300157
·
IF 6.8
Zhongyi Duan,Chuqiao Hu,Weijia Liu,Jinhai Liu,Zhengyu Chu,Weiqing Yang,La Li,Guozhen Shen
Fabrication of miniature-integrated devices combining energy harvester, energy storage, and various sensors via simple, fast, and efficient ways is strongly desired for the practical application of integrated smart systems. Herein, this work presents a simple one-step laser scribing method to prepare an all MXene-based seamlessly integrated system with integrated wireless charging coil, micro-supercapacitor, and photodetector in a small area of only 1.78 cm 2 . All the three modules in the integrated system are composed entirely of Ti 3 C 2 T x MXene and are connected with highly conductive MXene wires without additional welding or assembling operation. The energy is first received by the wireless charging coil and then stored in the Zn-ion micro-supercapacitor, which is subsequently used to drive the surface-modified (dodecyl triethoxysilane) DCTES-MXene-based photodetector, thus realizing the complete energy cycles. This work conceptually illustrates a simple method for designing and preparing integrated multifunctional wearable devices.
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ChemistrySelect
·
2023
·Vol. 8
·期 15
·e202300287
·
IF 2.1
Mengyu Liu,Xiang Yu,Lanting Yang,Guangzai Nong
Graphical In this study, copper-ammonia complexes were utilized as catalysts for the polymerization of hydroquinone. These complexes not only acted as catalysts, but also bound to the poly(hydroquinone) during the polymerization process. With acid hydrolysis to remove the complexes, a thermally stable poly(hydroquinone was obtained with a degree of polymerization of 2–9 and yield of 63.2 %. The copper-ammonia complexes also accelerated the polymerization rate by three times compared to using only ammonia solution, offering potential for improving hydroquinone polymerization efficiency. Poly(hydroquinone) (PHQ) is a class of polymers with a leading chain composed entirely of quinone-phenol structures, which possess both the heat resistance of polymers and the redox activity of the monomer quinone-phenol and have promising applications in sensors, anti-corrosion and antioxidants. However, the current synthesis efficiency is low, and the product solubility is poor, which hinders its wide application. In this paper, the copper-ammonia complex was used to catalyze the polymerization of hydroquinone. The product‘s structure was verified by FTIR, UV-Vis, XPS, SSNMR and EDS. The degree of PHQ obtained by GPC was 2–9, and the reaction mechanism of the polymerization process was demonstrated in detail. The experiments showed that the copper-ammonia complex not only acted as a catalyst but also participated in the reaction, firstly generating the PHQ copper-ammonia complex, which is almost insoluble in water and common organic solvents. Then by further acid washing to dislodge the copper-amino groups, the resulting PHQ was able to dissolve in solvents such as DMSO and methanol. In addition, the method is three times faster than the catalytic rate using an equivalent amount of ammonia.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Tengda Lu,Lele Yang,Xiao Chen,Mian Li,Lina Han,Chengxu Zhang,Peng Dong,Jie Xiao,Xiaoyuan Zeng,Yingjie Zhang
The negative effects of the widespread and rough use of fossil energy have promoted the emergence of new energy technologies. Cost-effective electrocatalysts play an irreplaceable role in energy conversion and storage , especially oxygen reduction reactions (ORR) catalysts. While the reserves of precious metal catalysts are rare and expensive, it is of prime importance to develop catalysts that can replace precious metals. In the present work, La 0.8 Sr 0.2 Mn 0.8 Co 0.2 O 3-δ (LSMC) with Mn and Co is successfully prepared by sol-gel method and subsequent calcination . The characterizations of physical phase, microstructure, BET and valence state of elements demonstrate that LSMC material possesses ample mesoporous structure, large specific surface area, and multivalent elements, which can provide abundant active sites for ORR. The electrochemical tests reveal that the LSMC delivers outstandingly higher electrocatalytic activity for ORR, relatively lower overpotential and Tafel slope and a better long-term stability than the other perovskites (LSM, LSC) under alkaline condition. Furthermore, the coupling effects of high content of high-valence Co, multivalent Mn and large amounts of adsorbed oxygen endow the catalyst excellent ORR electrocatalytic activity. The present work investigating the effect of Mn and Co elements on the electrocatalysis of LSMC perovskite, will provide the possibility of developing a new type of perovskite electrocatalyst with excellent ORR electrocatalytic activity and low cost.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xiao-Qing Yu,Xiaoying Zhang,Tongyue Qiu,Huilong Liu,Jiazhuang Guo,Qing Li,Zunmin Zhang,Su Chen
Particle engineering has been one of the hotspots in both stimuli-responsive and smart nanomaterials. However, efficient and facile implementation of robust covalent interaction in particle engineering remains a great challenge. Herein, we firstly propose an easy-to-perform and versatile bottom-up particle engineering strategy for covalent coupling between SiO 2 particle and carbon dots (CDs) in situ. Robust covalent interactions enable the nano-micro coupling of CDs and SiO 2 particles, and nearly twofold fluorescence enhancement of CDs was obtained. Moreover, hydrogen bond-driven assembly of the carbon dots@SiO 2 (CDs@SiO 2 ) particles was demonstrated via molecular dynamics (MD) simulations, which guaranteed the high-quality colloidal photonic crystals (CPCs) without coffee ring effect. In addition, the optical coupling between CPCs and CDs ensures brighter and more saturated structural colors, as well as enhanced fluorescence for microfluidics-derived bi-optical CDs@SiO 2 CPC supraballs. Based on this, bi-optical signal detection chip towards veterinary drug is developed. The in-situ covalent coupling strategy developed in this work might open an innovative avenue towards the particle engineering, which will also provide a methodological reference for the design of functional inorganic particles.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Jiahao Wu,Jeilei Tu,Shouzhe Yu,Hao Wu,Yucen Xie,Yanyun Yang,Zhangyang Xv,Qixin Zhang
Hollow structure-based multifunctional coatings with broadband antireflectivity, self-cleaning performance, stability, and durability can be applied to photovoltaic (PV) modules to maintain high transmittance and increase solar cell power generation. This research prepared bilayer hollow composite nanoparticles by improving and optimizing the nanoparticle synthesis and volume ratios. The optimal volume ratio of hollow SiO 2 to TiO 2 was determined using refractive index , transmittance , surface area, photocatalysis , and thermogravimetry . With the modification effect of methyltriethoxysilane, the refractive index interval of the composite coating was obtained, while giving the coating better hydrophobicity . A three-layer broadband antireflective coating (HT-TGBA) with a gradient refractive index structure was prepared using pre-designed simulation software. Various morphological and structural characterizations of HT-TGBA nanoparticles were performed. The transmittance of HT-TGBA-coated glass was significantly improved compared with that of uncoated glass. Its self-cleaning properties were confirmed by photocatalysis and surface hydrophobicity . Damp heat, abrasion tests, and pencil hardness tests proved the excellent durability of HT-TGBA, and measurements of sustained water contact angles demonstrated its stability. The short-circuit current density and photoelectric conversion efficiency were significantly improved by dip-coating HT-TGBA onto mini-modules. These results demonstrate that HT-TGBA has broad application prospects, supporting future large-scale applications of composite coatings in PV modules.
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