CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yize Zhao,Xing Li,Chengkun Zhao,Yujiang Fan,Ganjun Feng,Yong Sun
Endogenous regeneration of the nucleus pulposus (NP) is hindered by inefficient recruitment of stem/progenitor cells, limited control over differentiation, and poor matrix maintenance. Here, we developed a microsphere-based platform (GBKE) that transforms upon mild hydration into a dynamic, self-healing hydrogel, allowing in situ gelation and stable retention within soft tissues. The hydrogel forms a highly porous, interconnected network that facilitates nutrient transport and deep cellular infiltration. The microspheres form an interpenetrating network structure by co-assembling through β-sheet/π-π stacking driven self-assembly, combining gelatin methacrylamide (GelMA) with the self-assembling small molecule BPAA-GFF. The chondrogenic-inducing small molecule kartogenin is bound to the BPAA-GFF nanofiber network through non-covalent interactions such as hydrogen bonds and hydrophobic forces, achieving sustained inducing effect. The MSC affinity peptide E7 is covalently coupled to the surface of the microspheres to achieve targeted cell homing. Thanks to the enhanced effect of the nanofiber network induced by BPAA-GFF, the storage modulus (≈1700 Pa) and critical shear stress (≈35 Pa) of the microgels are significantly higher than those of pure GelMA microgel. In vivo, GBKE microgels significantly improved disc height index and extracellular matrix restoration in rat models, maintaining NP regeneration for at least 8 weeks. In rabbit models, MRI analyses and histological results confirmed durable structural and functional repair for up to 12 weeks. This system enables the programmed regulation of endogenous cell behavior, offering a promising approach for minimally invasive intervertebral disc repair.
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JOURNAL OF LUMINESCENCE
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2025
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IF 3.6
Yutian Zhang,Lianjie Li,Junyu Chen,Hai Guo
Fluorescent thermometers based on lanthanide-doped phosphors have broad application prospect because of their quickly response, highly sensitivity, non-contact mode and widely application scenarios. However, their relative sensitivity is limited by fixed thermal coupling energy level. Herein, Ca 2 GdNbO 6 :Dy 3+ ,Eu 3+ samples possessing dual-emission centers were fabricated as fluorescence thermometers based non-thermal coupling energy level. When excited by 393.5 nm, the characteristic emissions from Dy 3+ and Eu 3+ in CGNO:Dy 3+ ,Eu 3+ can be simultaneously detected. Furthermore, CGNO:Dy 3+ ,Eu 3+ phosphors exhibit excellent temperature sensing performance in fluorescence intensity (FI) relied on Eu 3+ and fluorescence intensity ratio (FIR) relied on dual-emission centers. The maximum relative sensitivities ( S Rmax ) reach 1.61 %K −1 at 426 K for FI at 703 nm, 1.01 %K −1 at 391 K for FIR of FI at 616 nm and FI at 576 nm, and 2.18 %K −1 at 501 K for FIR of FI at 703 nm and FI at 576 nm, respectively. These findings demonstrate that Ca 2 GdNbO 6 :Dy 3+ ,Eu 3+ samples are prime candidates for fluorescent thermometers.
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Materials Today Communications
·
2024
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IF 3.7
Jia Mi,Yingchun Li,Wensheng Wang,Zhimao Li,Tong Liu,Guang Nie,Zheyu Zhang
Bio-based copolyesters have garnered significant attention in the domains of packaging and agriculture due to their exceptional degradability and mechanical properties. Building upon existing research, this study further modifies bio-based copolyesters with the objective of enhancing their comprehensive mechanical properties and broadening their application scope. High-performance aromatic copolyesters were synthesized through a two-step esterification and polycondensation process, utilizing terephthalic acid, adipic acid, 1,4-butanediol, and erythritol as raw materials. The structures of the synthesized copolyesters were characterized using FTIR, 1 H NMR, 13 C NMR. Compared to PBAT, the tensile strength and elongation at break of the copolyesters demonstrated improvements of 22.14 % and 80.14 %, respectively. Moreover, the tear strength and puncture resistance of the copolyesters were enhanced by 25.10 % and 54.13 %, respectively. TG indicated that the copolyesters exhibit high thermal stability. Notably, these copolyesters maintained good degradability after 35 days at ambient temperature. In conclusion, the enhancement of both mechanical and degradation properties of copolyesters was imperative for the advancement and promotion of degradable foams, films, and elastomers.
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Materials Today Communications
·
2024
·
IF 3.7
Haitao Yin,Can Wei,Yuwei Ye,Zhixiang Wang,Shengguo Zhou
Carbon dots have significantly contributed to corrosion resistance due to their varied physical and chemical properties, excellent biocompatibility, and high surface activity. Therefore, designing and developing high-performance carbon dot inhibitors is of great significance. The study successfully synthesized lanthanum and nitrogen co-modified carbon dots (La/N-CDs), which function as a green and effective corrosion inhibitor. It was found that the La/N-CDs inhibitor presented a nanostructure with size of 3–9 nm. Electrochemical experiments, such as Tafel plots and EIS, showed that the presence of La/N-CDs effectively suppressed metal corrosion in a chloride-containing corrosion solution. In a 3 wt% NaCl solution, 400 mg/L La 15 % /N-CDs exhibited the best corrosion inhibition performance, with an impedance modulus of 2165.33 Ω cm² and an inhibition efficiency reaching as high as 93.07 %, while the surface roughness of the steel and the corrosion rate was also minimized. This might be explained by the formation of an adsorption layer by La/N-CDs on the metal surface, a phenomenon confirmed by Langmuir isotherm and XPS investigations. These findings confirmed that La/N-CDs could form a protective film on the metal surface, significantly improving its corrosion resistance and extending its service life in corrosion environment. The study’s findings offered insights and a conceptual structure for enhancing corrosion inhibitors using carbon dots that were augmented with rare earth elements.
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ADVANCED MATERIALS
·
2020
·Vol. 32
·期 39
·2002382
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IF 27.398
Changming Zhao,Gan Luo,Xiaokang Liu,Wei Zhang,Zhijun Li,Qian Xu,Qinghua Zhang,Huijuan Wang,Deming Li,Fangyao Zhou,Yunteng Qu,Xiao Han,Zezhou Zhu,Geng Wu,Jing Wang,Junfa Zhu,Tao Yao,Yafei Li,Henny J.M. Bouwmeester,Yuen Wu
Electrochemical reduction of CO to value-added products holds promise for storage of energy from renewable sources. Copper can convert CO into multi-carbon (C 2+ ) products during CO electroreduction. However, developing a Cu electrocatalyst with a high selectivity for CO reduction and desirable production rates for C 2+ products remains challenging. Herein, highly lattice-disordered Cu 3 N with abundant twin structures as a precursor electrocatalyst is examined for CO reduction. Through in situ activation during the CO reduction reaction (CORR) and concomitant release of nitrogen, the obtained metallic Cu° catalyst particles inherit the lattice dislocations present in the parent Cu 3 N lattice. The de-nitrified catalyst delivers an unprecedented C 2+ Faradaic efficiency of over 90% at a current density of 727 mA cm −2 in a flow cell system. Using a membrane electrode assembly (MEA) electrolyzer with a solid-state electrolyte (SSE), a 17.4 vol% ethylene stream and liquid streams with concentration of 1.45 m and 230 × 10 −3 m C 2+ products at the outlet of the cathode and SSE-containment layer are obtained.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
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IF 22.1
Liang Fu,Zhenping Qu,Lingling Zhou,Yue Ding
Interface engineering is demonstrated to lead to significant improvement in the catalytic performance for electrochemical CO 2 reduction reactions (CO 2 RR). In this work, we demonstrate a heterogeneous In(OH) 3 -Ag interface catalyst in which the appropriate In(OH) 3 clusters modified on metal Ag nanoparticles surface greatly improves the CO selectivity in CO 2 RR, realizing a CO faradaic efficiency (FE CO ) of 93% at − 0.7 V vs. RHE. The performance enhancement is attributed to the preferentially CO 2 adsorption and activation by the In(OH) 3 -Ag interface sites. In situ Raman spectroscopy reveals that the formation of In(OH) 3 -Ag interface sites is significantly favorable for the generation of key *CO 2 − intermediate at low overpotential. Further theoretical calculation confirms that the In(OH) 3 -Ag interface could enhance the adsorption of *COOH species on catalyst by means of tailoring the surface properties and electronic structures. This work shows that hydroxide-metal interface engineering is a promising pathway to regulate the activity for selective CO 2 RR properties.
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JOURNAL OF MATERIALS SCIENCE
·
2025
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IF 3.9
Qi Lun,Tu Dan,Shi Yu,Liu Jingjing,Zhao Xinyuan,Xu Jianhua,Yang Yajie,Yang Wenyao
Zeolitic imidazolate frameworks (ZIFs) have greatly attracted attention in supercapacitors research due to their porosity and structural controllability. In this paper, a series of Co–nitrogen carbon (Co–NCs) were obtained via a facile one-step calcination process using 3D star-shaped Co–ZIF as a precursor. The energy storage mechanism is analyzed and it is concluded that Co–NCs show excellent capacitance and cycling stability, attributed to its star-shaped porous morphology and high pseudocapacitance contribution. The optimized Co–NCs/550 exhibits a specific capacity of 825 F g −1 at a current density of 0.1 A g −1 , and a highly stable cycling performance over 5000 cycles at a current density of 2 A g −1 . This work provides a practical strategy for designing stable electrode for high-performance supercapacitors.
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Chem
·
2024
·
IF 19.1
Xiaoran Zhang,Xiaorong Zhu,Shuowen Bo,Chen Chen,Qingfeng Zhai,Shuang Li,Xiaojin Tu,Jianyun Zheng,Dongdong Wang,Xiaoxiao Wei,Wei Chen,Tehua Wang,Yafei Li,Qinghua Liu,San Ping Jiang,Liming Dai,Shuangyin Wang
Electrocatalysis offers a sustainable approach to artificial nitrogen fixation yet faces numerous challenges. Selective synthesis of nitrogen-containing compounds shows promise but needs significant improvement. Herein, we demonstrate selective ammonia and urea synthesis via co-electrolysis with CO 2 . High CO binding energy on Re-Mn catalysts leads to the formation of ∗C species, which serve as electron reservoirs to enhance N 2 activation for C-N coupling (N 2 + ∗C → ∗CN 2 ), followed by C-N dissociation. This results in ammonia production with a yield rate of 48.9 ± 2.4 mg g −1 h −1 and an N-selectivity of 98.4%. In contrast, Zn-Mn sites, characterized by low CO binding, facilitate the migration of CO and its coupling with adsorbed N 2 (CO + ∗N=N∗ → ∗NCON∗). Subsequent hydrogenations of ∗NCON∗ promote urea synthesis with an N-selectivity of 89.1%. Utilizing Janus coupling with two C-N pathways aims to meet energy, agriculture, and chemical industry demands. We realized the selective synthesis of ammonia and urea, respectively, in one electrocatalytic system for the first time by Janus coupling with two distinguishable C-N coupling paths from N 2 and CO 2 .
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yongmei Lu,Lecheng Liang,Shao Ye,Zheng Chen,Weiyue Zhao,Zhiming Cui
The sluggish kinetics of methanol oxidation reaction (MOR) and poor long-term durability of catalysts are the main restrictions of the large-scale applications of direct methanol fuel cells (DMFCs). Herein, we demonstrated an inspirational ternary Pt3Sn0.5Mn0.5/DMC intermetallic catalyst that reached 4.78 mA cm–2 and 2.39 A mg–1Pt for methanol oxidation, which were 2.50/2.44 and 5.62/5.31 times that of commercial PtRu/C and Pt/C. After the durability test, Pt3Sn0.5Mn0.5/DMC presented a very low current density attenuation (38.5%), which was significantly lower than those for commercial PtRu/C catalyst (84.2%) and Pt/C (93.1%). Density functional theory (DFT) calculations revealed that the coregulation of Sn and Mn altered the surface electronic structure and endowed Pt3Sn0.5Mn0.5 with selective adsorption of Pt for CO and Sn for OH, which optimized the adsorption strength for intermediates and improved the reaction kinetics of MOR. Beyond offering an advanced electrocatalyst, this study provided a new point of view for the rational design of superior methanol oxidation catalysts for DMFC.
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Journal of Biomedical Nanotechnology
·
2021
·Vol. 17
·期 8
·1598-1611
·
IF 4.099
Zhao Dan,Zhang Rui,Xu Mengyu,Xiao Xincai,Zhao Haiyan,Huang Xianju
Multifunctional carbon dots have drawn considerable attention due to their potential biomedical application value. We report the preparation of blue-green fluorescence-emitting, multifunctional, nitrogen-and-sulfur co-doped carbon dots (N, S-CDs) synthesized via a one-step process using
1-thioglycerol as a sulfur source, glucose and citric acid as carbon sources, and polyethyleneimine as a nitrogen source. Because of abundant amino and sulfur content, the CDs exhibited high sensibility and selectivity for detecting Cu2+ (detection limit: 0.01 μM, linear range:
0.025 to 50 μM). Fast and sensitive detection of tiopronin was also achieved on the basis of the fluorescence “off-on” mode considering the strong affinity between tiopronin and Cu2+. The N, S-CDs exhibited good biocompatibility as determined by fluorescence imaging
using onion epidermal cells and gram-positive bacteria. The CDs also exhibited excellent antimicrobial ability against the gram-positive bacteria. Our results indicate that these novel N, S-CDs could be ideal candidates for several biochemical applications such as antibacterial treatment and
detection of small biomolecules.
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SYNTHETIC METALS
·
2020
·
IF 3.286
Ke Qu,Yuqi Bai,Xiyan Gao,Miao Deng
Graphite and multiwall carbon nanotube (MWCNT) served as dual dopants to prepare the composite with poly (aniline- co - o -methoxyaniline) copolymer electrochemically. The aniline to o -methoxyaniline monomer feed ratio was screened, with 4 to 1 monomer ratio being optimal. The supercapacitive properties of the prepared dual dopant-doped composite as electrode materials have been investigated and yielded a large specific capacitance of 535.0 F/g under 1.0 A/g current density and showed excellent rate performance, even with large current densities applied (up to 50.0 A/g). The composite remained to give a relatively stable specific capacitance of more than 200.0 F/g after 500 galvanostatic charge-discharge cycles, which afforded better and/or comparable performance compared with other polyaniline-based composite. The composite’s morphological features were characterized with scanning electron microscopy. The results from this study will be significant for the development of conducting polymer-based energy storage materials.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2022
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IF 11.357
Wenqi Jiang,Wangjing Zhai,Xueke Liu,Fang Wang,Donghui Liu,Xiangyang Yu,Peng Wang
Antibiotics could enter farmlands through sewage irrigation or manure application, causing combined pollution with pesticides. Antibiotics may affect the environmental fate of pesticides and even increase their bioavailability. In this study, the influence of monensin on the degradation, toxicity, and availability of atrazine in soil-earthworm microcosms was investigated. Monensin inhibited the degradation of atrazine, changed the metabolite patterns in soil, and increased the bioavailability of atrazine in earthworms. Atrazine and monensin had a significant synergistic effect on earthworms in the acute toxic test. In long-term toxicity tests, co-exposure of atrazine and monensin also led to worse effects on earthworms including oxidative stress, energy metabolism disruption, and cocoon production compared to single exposure. The expression of tight junction proteins was down-regulated significantly by monensin, indicating that the intestinal barrier of earthworms was weakened, possibly causing the increased bioavailability of atrazine. The expressions of heat shock protein 70 (Hsp70) and reproductive and ontogenetic factors (ANN, TCTP) were all downregulated in binary exposure, indicating that the resilience and cocoon production of earthworms were further weakened under combined pollution. Monensin disturbed the energy metabolism and weakened the intestinal barrier of earthworms. These results showed that monensin increased the risks of atrazine in agricultural areas.
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