JOURNAL OF POROUS MATERIALS
·
2017
·Vol. 25
·期 1
·189-198
·
IF 1.624
Feng Zhouzhou,Lv Xiang,Wang Tianhe
TiO 2 porous ceramic/Ag–AgCl composite was prepared by incorporating AgCl nanoparticles within the bulk of TiO 2 porous ceramic followed by reducing Ag + in the AgCl particles to Ag 0 species under visible light irradiation. The porous TiO 2 ceramic was physically robust and chemically durable, and the porous structure facilitated the implantation of AgCl NPs. Compared with the bare TiO 2 ceramic, TiO 2 porous ceramic/Ag–AgCl composite exhibited higher photocatalytic performance for the degradation of MO and RhB under visible light irradiation. The reaction rate constants k of MO and RhB degradation over TiO 2 porous ceramic/Ag–AgCl composite was respectively 6.25 times and 3.62 times higher than those recorded over the bare TiO 2 porous ceramic. The photocatalytic activity showed virtually no decline after four times cyclic experiments under visible light irradiation. Scanning electron microscopy, energy dispersive X-ray analysis, X-ray diffraction, UV–Vis diffuse reflectance spectroscopy, photoluminescence spectra and X-ray photoelectron spectroscopy were used to characterize the TiO 2 porous ceramic/Ag–AgCl composite.
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Nano-Micro Letters
·
2024
·Vol. 17
·期 1
·1-16
·
IF 31.6
Tang Junhui,Zhu Renyang,Pai Ya-Hsin,Zhao Yan,Xu Chen,Liang Ziqi
Investigation of dispersing solvents on processing Ti 3 C 2 T x thin films revealed that deionized water is superior to realize tight stacking and high orientation of MXene nanosheets.
A simultaneous elevation of Seebeck coefficient and electrical conductivity of neat Ti 3 C 2 T x films is achieved by increasing the centrifugal speed of MXene aqueous suspensions due to the energy filtering effect.
Further construction of Ti 3 C 2 T x nanocomposites significantly strengthens Seebeck coefficient yet disrupts the stacking of MXene nanosheets.
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KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2025
·
IF 3.2
Liu Yang,Liang Kaili,Zhang Keqin,Du Bowen,Hu Lishuang,Yuan Zhilei,Zhang Jianren,Lu Yuewen,Yu Qi,Lv Zhixing
The output energy properties of the AP/Ti, Cl-20/Ti, HMX/Ti, and DAP-4/Ti mixtures were compared using an oxygen bomb calorimeter. The thermal decomposition processes of the above four kinds of mixed energetic materials were studied with a differential scanning calorimeter (DSC), and the apparent activation energies of the mixed materials were calculated using the Kissinger equation. The combustion flames of the four energetic materials were captured through high-speed photography, and the combustion properties of the mixed energetic materials with titanium powders were analyzed. The results indicate that the combustion heat value of DAP-4/Ti mixed energetic materials is up to 10,133 J·g −1 , significantly higher than the 8613 J·g −1 of the Cl-20/Ti mixture and the 9720 J·g −1 of the HMX/Ti mixture. The combustion process of the DAP-4/Ti mixture only takes 145 ms. The heat release, burning rate, and flame strength of the DAP-4/Ti mixture are better than those of other mixed energetic materials. The calculated apparent activation energy of DAP-4/Ti mixture is 150.4 kJ·mol −1 , which is 55 kJ·mol −1 lower than that of DAP-4. The apparent activation energies of Cl-20/Ti and HMX/Ti are 173.6 kJ·mol −1 and 317.2 kJ·mol −1 , respectively. These findings demonstrate that DAP-4/Ti mixed energetic materials exhibit good energy characteristics and combustion performance.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2024
·Vol. 22
·期 1
·1-21
·
IF 10.6
Liu Shixin,Jiang Yuanfang,Zhang Yu,Lv Kai,Zhu Jiaxin,Liu Mei,Xu Hao,Jiao Genlong,Yang Wanyong,Sun Guodong,Ma Dong
Bacterial biofilms are one of the major contributors to the refractoriness of septic arthritis. Although nitric oxide (NO)-enhanced photodynamic (PDT) therapy has been involved in biofilm eradication, the anti-biofilm efficacy is usually hindered by the short half-life and limited diffusion distance of active molecules. Herein, we report a three-arm structure using the photosensitive core chlorin e6 to integrate three α-cyclodextrin (α-CD) polyrotaxane chains as the supramolecular nanocarrier of NO-enhanced PDT therapy, in which NO was loaded on the cationic rings (α-CDs). Beneficial from the enhanced permeability of the nanocarrier due to the collective act on biofilms by the molecular motions (slide and rotation of rings) of three chains in different directions, NO capable of inducing biofilm dispersal and reactive oxygen species were efficiently delivered deep inside biofilms under 660 nm laser irradiation, and reactive nitrogen species with stronger bactericidal ability was produced in-situ, further accomplishing bacteria elimination inside biofilms. In-vivo therapeutic performance of this platform was demonstrated in a rat septic arthritis model by eliminating the methicillin-resistant Staphylococcus aureus infection, and potentiating the immune microenvironment regulation and bone loss inhibition, also providing a promising strategy to numerous obstinate clinical infections caused by biofilms.Graphical
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MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 3
·1-10
·
IF 5.3
Zou Ziwei,Chen Yi,Sun Rengang,Shi Boya,Jiang Li,Huang Feixiang
A surface plasmon resonance imaging (SPRi) biosensor is presented which facilitates rapid and sensitive detection of the ovarian cancer biomarker carbohydrate antigens 125 (CA125). The CA125 protein was specifically captured and directly recognized by polyadenylic (polyA)-modified DNA aptamer on the surface of a Au chip. The biosensor demonstrated a linear range of direct detection of CA125 based on SPRi from 20 nM to 0.5 nM, with a detection limit of 0.47 nM. Furthermore, Fe 3 O 4 nanoparticles were synthesized in situ on the carboxyl-functionalized two-dimensional (2D) material Ti 3 C 2 to obtain MXC/Fe 3 O 4 nanocomposites. The large surface area of Ti 3 C 2 provides ample binding sites for the in situ generation of Fe 3 O 4 and this facilitates subsequent immobilization of DNA aptamers. The amino-modified DNA aptamer interacted with carboxylate sites activated on the surface of Ti 3 C 2 , and the aptamer was immobilized on the MXC/Fe 3 O 4 nanocomposite surface. Due to the magnetic properties of Fe 3 O 4 nanoparticles within the composite material, CA125 protein in serum can be effectively captured and separated under an external magnetic field. The captured protein forms a sandwich amplification structure with the DNA adapter on the surface of the Au chip, thereby enhancing the detection signal of CA125. The biosensor demonstrates a linear detection range from 0.5 pM to 1000 pM, with a detection limit as low as 81 fM. The unique separation capability of the composite nanomaterials enables the biosensor to detect CA125 protein as low as 1 pM in complex liquid matrices such as serum, achieving exceptional selectivity, accuracy, and sensitivity in detecting the ovarian cancer marker. This capability significantly supports the early diagnosis of ovarian cancer. Graphical abstract
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International Journal of Environmental Science and Technology
·
2025
·
IF 3.4
Shen ZR.,Zeng ZH.,Yang Q.
Unaged microplastics, as well as residual monomers or additives from the processing stage would affect the plants, animals, and human body. Aged microplastics (MPs) containing degradation products are widespread pollutants. There is a gap in the effects of aged microplastics on human body. Through static digestion simulation experiments, this study investigates the interaction between aged polystyrene microplastics (PS MPs) with different molecular weights and simulated digestive fluids. The findings reveal that degradation products existing on the surface of PS MPs are released into the simulated digestive fluids, leading to a "dual reduction" in both the physical size and molecular weight of MPs. This result implies that the potential risk of cells ingesting MPs increases due to the ageing of plastics. Moreover, these degradation products impact the micro-environment of digestive enzymes, consequently leading to conformational changes in the macromolecules of these enzymes. The longer the ageing time, the greater degradation products are released and the more solute is adsorbed, which may pose even graver hazards to the bio-safety. This study contributes to assessing the effects and potential risks of aged PS MPs on human health. It emphasizes the importance of investigating the risk of aged MPs that could enter cells, inducing some hazardous effects after digestion.
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Nature Energy
·
2024
·
IF 49.7
Jie Yulin,Wang Shiyang,Weng Suting,Liu Yue,Yang Ming,Tang Chao,Li Xinpeng,Zhang Zhengfeng,Zhang Yuchen,Chen Yawei,Huang Fanyang,Xu Yaolin,Li Wanxia,Guo Youzhang,He Zixu,Ren Xiaodi,Lu Yuhao,Yang Ke,Cao Saichao,Lin He,Cao Ruiguo,Yan Pengfei,Cheng Tao,Wang Xuefeng,Jiao Shuhong,Xu Dongsheng
The development of practical lithium metal cells is plagued by their limited lifespan, primarily due to the poor interfacial stability of the electrolytes. Here we present a compact ion-pair aggregate (CIPA) electrolyte that enables high-performance Li metal pouch cells under lean electrolyte conditions. The electrolyte features a unique nanometre-scale solvation structure in which ion pairs are densely packed to form large CIPAs, in contrast to conventional electrolytes that comprise small aggregates. Notably, the CIPAs facilitate fast interfacial reduction kinetics on the Li metal anode via a collective electron-transfer process, leading to the formation of a stable interface. A 505.9 Wh kg −1 Li metal pouch cell with a high-nickel-content cathode (LiNi 0.905 Co 0.06 Mn 0.035 O 2 ) exhibited a 91% energy retention after 130 cycles. This work demonstrates nanostructured electrolyte design for realizing high-performance Li metal batteries. It also showcases the importance of understanding interfacial reaction mechanisms in the design and development of electrolytes.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
·
IF 15.7
Chen Xiuling,Chen Guining,Xie Cong,Wu Lei,Liu Gongping,Li Nanwen,Jin Wanqin
High-performance gas separation membranes have potential in industrial separation applications, while overcoming the permeability-selectivity trade-off via regulable aperture distribution remains challenging. Here, we report a strategy to fabricate Polyolefin Reweaved Ultra-micropore Membrane (PRUM) to acquire regulable microporous channel. Specifically, olefin monomers are dispersed uniformly into a pristine membrane (e.g., PIM-1) via solution diffusion method. Upon controlled electron beam irradiation, the olefin undergoes a free radical polymerization, resulting in the formation of olefin polymer in-situ reweaved in the membrane. The deliberately regulated and contracted pore-aperture size of the membrane can be accomplished by varying the olefin polymer loading to achieve efficient gas separation. For instance, PIM-1 PRUM containing 27 wt% poly-glycidyl methacrylate demonstrate CO 2 permeability of 1976 Barrer, combined with CO 2 /CH 4 and CO 2 /N 2 selectivities of 58.4 and 48.3 respectively, transcending the performance upper bounds. This controllable and high efficiency-design strategy provides a general approach to create sub-nanometre-sized pore-apertures of gas separation membranes with wide universality.
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2024
·
IF 2.6
Li Wenkai,Zeng Haodong,Xie Zhiyong
The bipolar plate is an important part of the proton exchange membrane fuel cell, which has high requirements for mechanical properties and strength. Composite bipolar plates have the advantages of easy processing and corrosion resistance, but there are problems such as difficulty in balancing between mechanical properties and electrical conductivity. In this study, surface-coating modification of chopped carbon fibers was carried out by catalytic chemical vapor deposition, and multi-walled carbon nanotube-coated carbon fiber composites with better interfacial contact properties and improved specific surface area were prepared and added to polyvinylidene fluoride/expanded graphite to synthesize composite bipolar plates. Due to the selective distribution of carbon nanotubes and the synergistic construction of conductive pathways with carbon fibers, the performance of the composite bipolar plate was improved, with a conductivity of 116.01 S/cm, a flexural strength of 50.37 MPa, and both good hydrophobicity and corrosion resistance and a corrosion current density of 0.804 µA cm −2 . The results show that the prepared composite bipolar plates meet the requirements in fuel cell use, and the use of carbon nanotubes coated with carbon fibers to synergistically construct conductive networks has also proven to be a potential performance enhancer for composite bipolar plates.
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JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2024
·
IF 3
Chen Qingyi,Qu Meijie,Li Shuhui,Wang Hai,Tang Ping,Ma Yue,Zhang Rui,Wang Hongru,Bin Yuezhen
With the rapid growth of resource depletion, heat storage materials play a vital role in sustainable development. However, as a kind of heat storage material, phase change material (PCM) leaks easily when used, so anti-leak measures are crucial. In this study, microencapsulation phase change materials (MPCMs) were prepared by emulsifying first and then crosslinking, in which tetraethyl orthosilicate (TEOS) was used as the shell coating precursor, octadecane as the core and sodium dodecyl sulfonate (SDS) as the emulsifier. The grafted objects of Si–O bonds in TEOS were adjusted through different ratios of SDS/octadecane. The results showed that when the mass ratio of SDS/octadecane is 0.067, SDS is hydrolyzed to lauryl alcohol under acidic conditions and grafted with silica, and the phase transition temperature is − 20 °C. SDS gradually changed from graft to adhere with octadecane through sulfonic acid bond when the mass ratio of SDS/octadecane increased. Si–O bonds combine octadecane with sulfonic acid bonds through van der Waals forces and the indirect branches of Si–O bonds form an inorganic silica shell. When the mass ratio of SDS/octadecane is 0.15, the phase transition temperature was 23 °C and the phase transition enthalpy was 111.9 J g −1 . The obtained silica/octadecane MPCMs have small diameter, good thermal stability and the phase change enthalpy remains stable after 500 cycles, and the composite materials blended with polyvinyl alcohol also have good thermal properties. It is expected to be applied in the field of heat management textiles.
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JOURNAL OF ELECTRONIC MATERIALS
·
2024
·
IF 2.2
Xu Kai,Cui Jinjin,Lin Wanming,Liang Jian
In order to obtain graphene composite materials with good microwave absorption performance, Fe 3 O 4 particles were prepared by a coprecipitation method, and then combined with carboxymethyl cellulose (CMC) to prepare Fe 3 O 4 /CMC particles. Then, Fe 3 O 4 /CMC was successfully combined with graphene oxide (GO) through ultrasonic oscillation to prepare Fe 3 O 4 /CMC/GO composite materials. The structures and morphologies of the materials were characterized by x-ray diffraction (XRD), Raman spectroscopy, and scanning electron microscopy (SEM), and the results showed that spherical Fe 3 O 4 /CMC particles were uniformly distributed on the surface of GO. The electromagnetic parameter testing of Fe 3 O 4 /CMC/GO composite materials in the range of 2–18 GHz revealed that the magnetic loss mechanism was mainly natural resonance loss and exchange resonance loss. What is more, its microwave absorption performance was calculated by using line transmission theory. The microwave absorption performance of the composite showed that the composite had excellent microwave absorption ability when the weight ratio of Fe 3 O 4 /CMC to GO was 3:1. When the thickness of the composite material was 3.5 mm, the minimum reflection loss reached − 36.82 dB, indicating that over 99.9% of the microwaves were absorbed by the composite material, and that the effective absorption bandwidth was 6.10–8.52 GHz, reaching 2.42 GHz.
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Journal of Central South University
·
2024
·Vol. 31
·期 1
·138-150
·
IF 3.7
Ouyang Yi-wen,Liang Jian-jun,Gao Xiao-feng
In order to efficiently remove 4-nitrophenol (4-NP) and 2,4-dinitrophenol (2,4-DNP), 4-NP and 2,4-DNP were used as template molecules and double-template magnetic molecularly imprinted polymers (D-MIPs) were prepared by surface molecular imprinting technology using itaconic acid as functional monomer, Fe 3 O 4 @SiO 2 as carrier, ethylene glycol dimethacrylate as crosslinking agent and azodiisobutyronitrile as initiator. The morphology of D-MIPs was characterized using FT-IR and SEM. The adsorption specificity, regenerability, and applicability of D-MIPs were studied in detail. The results show that D-MIPs successfully coated the surface of the Fe 3 O 4 @SiO 2 carrier and had a good polymerization effect, specific recognition sites, and good imprinting performance, with a diameter of 90 nm and homogeneous shape. The theoretical adsorption capacities of 4-NP-MIPs, 2, 4-DNP-MIPs, and D-MIPs for target molecules were 103.97, 73.14 and 123.99 mg/g, respectively. There were many adsorption sites with different adsorption energies. D-MIPs reached the optimal adsorption equilibrium state in 30 min. The best fitting models for the MIPs were the Freundlich adsorption and pseudo-second-order kinetic models, indicating that adsorption of MIPs occurred via a chemical adsorption process. Test results show that MIPs had highly specific recognition and selective adsorption capacity in different water samples. After eight regeneration cycles, the adsorption capacity of D-MIPs decreased by 7.51%, confirming that MIPs had excellent regeneration.
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