CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Tianhuan Yang,Bokun Chang,Shubo Fan,Yulong Zhou,Xianbao Zhong,Lei Huang,Chi Zhang,Feinan Hu,Chenyang Xu,Jiangwen Li,Hailong He,Jialong Lv,Wei Du
Environmental aging transforms discarded plastics into microplastics (MPs) with altered surface properties, enabling them to adsorb heavy metals and co-transport through soil and groundwater. This study examines the effects of ultraviolet (UV) aging on MPs and their interactions with cadmium (Cd), lead (Pb), and copper (Cu). We combined experimental characterization with theoretical calculations. This integrated approach aims to systematically elucidate the metal-specific complexation mechanisms governing co-migration dynamics. Aging significantly increases the specific surface area (1.40 to 5.24 m 2 /g), oxygen content (4.64 % to 21.57 %), and abundance of oxygen-containing functional groups on MPs. These changes markedly enhance heavy metal adsorption, with capacities following the order: Pb (20.95 mg/g) > Cu (7.33 mg/g) > Cd (2.32 mg/g). The adsorption capacity of MPs for heavy metals is influenced by the ionic hydration radius, electronegativity, and affinity between metal ions and surface functional groups. Quantum chemistry calculations further reveal that Pb shows the strongest binding affinity to oxygen-containing functional groups, particularly to carboxyl group (−2.02 eV), followed by Cu (−1.89 eV) and Cd (−1.65 eV). Divalent cations (Ca 2+ ) significantly suppress heavy metal adsorption on aged MPs. Notably, aged MPs maintain substantial adsorption ability even after desorption, suggesting their potential role as long-term environmental carriers. Aged MPs facilitate the transport of heavy metals in porous media, while heavy metals inhibit the transport of MPs; both effects intensify with increasing metal adsorption. Our findings uncover the underlying reaction mechanisms, providing novel insights and a solid foundation for the synergistic remediation of MPs and heavy metal pollution.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
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IF 3.133
Qian Wang,Chensheng Lin,Guohong Zou,Mengjiao Liu,Daojiang Gao,Jian Bi,Ling Huang
A new noncentrosymmetric material, namely, K 2 [B 3 O 3 (OH) 5 ] has been obtained by conventional solution reaction. It crystallizes in the orthorhombic space group Ama 2 (no. 40). In the structure of K 2 [B 3 O 3 (OH) 5 ], the BO 2 (OH) triangles and BO 2 (OH) 2 tetrahedra are linked via sharing corners forming the isolated [B 3 O 3 (OH) 5 ] 2- anionic groups with no dangling bonds in oxygen atoms. And K 2 [B 3 O 3 (OH) 5 ] is the first synthetic noncentrosymmetric borates with [B 3 O 3 (OH) 5 ] 2- anionic groups. Powder second-harmonic generation (SHG) using the Kurtz−Perry technique showed that K 2 [B 3 O 3 (OH) 5 ] is type I phase-matchable, and the measured SHG coefficient is 0.32 times that of KH 2 PO 4 . The UV transmittance spectroscopy measurement indicated that the UV absorption edge was below 200 nm, suggesting that K 2 [B 3 O 3 (OH) 5 ] might be a promising deep-UV nonlinear optical material. Band structure and optical property calculations based on DFT methods were also performed.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Mingchen Yang,Chengling Huang,Hou-Yong Yu,Yanjuan Dong,Somia Yassin Hussain Abdalkarim,Cong Cong Qin,Meiqin Wu,Yunfei Shen
Hydrogels with excellent high-water uptake and flexibility have great potential for wound dressing. However, pure hydrogels without fiber skeleton faced poor water retention, weak fatigue resistance, and mechanical strength to hinder the development of the dressing as next-generation functional dressings. We prepared an ultrafast gelation (6 s) Fe 3+ /TA-CNC hydrogel (CTFG hydrogel) based on a self-catalytic system and bilayer self-assembled composites. The CTFG hydrogel has excellent flexibility (800% of strain), fatigue resistance (support 60% compression cycles), antibacterial, and self-adhesive properties (no residue or allergy after peeling off the skin). CTFG@S bilayer composites were formed after electrospun silk fibroin (SF) membranes were prepared and adhesive with CTFG hydrogels. The CTFG@S bilayer composites had significant UV-shielding (99.95%), tensile strain (210.9 KPa), and sensitive humidity-sensing properties. Moreover, the integrated structure improved the mechanical properties of electrospun SF membranes. This study would provide a promising strategy for rapidly preparing multifunctional hydrogels for wound dressing.
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JOURNAL OF APPLIED MICROBIOLOGY
·
2025
·Vol. 136
·期 9
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IF 3.2
Song Kangjia,Liu Jie,Zhou Wenqi,Zhang Feifei,Fan Lei,Zhu Deyi,Zhang Xuanhui,Wang Zhi,Sun Jiazhen
AimsThis research aims to screen and identify a microbial strain capable of efficiently degrading waterborne polyurethane used in the biomedical field. Furthermore, the research seeks to enhance the strain’s degradation capability through ultraviolet mutagenesis and elucidate its enzymatic degradation mechanism.Methods and resultsWe successfully isolated the target strain from the soil sample and identified it as Bacillus sp. J-11. Under optimized culture conditions (substrate concentration of 0.4%, temperature of 30°C, and pH of 6.0), strain J-11 exhibited remarkable degradation capability towards biomedical-grade polyurethane emulsion (Baymedix® CD104), achieving a degradation efficiency of 78.2% within 4 days. Gel permeation chromatography (GPC) analysis demonstrated a progressive decrease in the molecular weight of the polyurethane film over time. Thermogravimetric analysis (TGA) further revealed a reduction in thermal stability, while extended depth field microscopy (EDFM) uncovered significant microscopic structural changes, including holes and collapse on the film surface. Additional degradation experiments conducted on commercial PU foam under co-carbon conditions showed that strain J-11 achieved a degradation rate of 37.6% within 30 days. Enzyme activity assays indicated that the hydrolytic and oxidative enzymes secreted by strain J-11 played a critical role in the degradation process.ConclusionsStrain J-11 exhibits highly efficient biodegradation potential through the secretion of hydrolases and oxidases, which break down the molecular chains of polyurethane. This study has elucidated its degradation pathway and provided a theoretical foundation for future mechanistic investigations and the management of biomedical material waste.
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RSC Advances
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2018
·Vol. 8
·期 43
·24346-24354
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IF 2.936
Ruru Li,Xiaoyu Huang,Guolin Lu,Chun Feng
Biological thiols with similar structures, such as glutathione (GSH), N-acetyl-L-cysteine (NAC), homocysteine (Hcy) and cysteine (Cys), play important roles in human physiology and are associated with different diseases. Thus, the discrimination of these thiols is a great necessity for various biochemical investigations and the diagnosis of related diseases. Herein, we present a new dual-signaling probe consisting of a typical aggregation induced emission fluorogen of a tetraphenylethylene group and 2,4-dinitrobenzenesulfonyl moiety. The probe can be used to selectively and quantitatively detect Cys over a variety of bio-species, including GSH, NAC and Hcy, from both UV/vis absorption and fluorescence channels. The mechanism study showed that the fluorescence and UV/vis absorption were turned on as the probe undergoes displacement of the 2,4-dinitrobenzenesulfonyl group with Cys, where the UV/vis and fluorescence signals originate from the dinitrophenyl-containing compounds and aggregates of TPE-OH, respectively. In addition, the discrimination of Cys was achieved by more rapid intramolecular displacement of sulfur with the amino group of Cys than NAC, Hcy and GSH. Moreover, the probe shows ignorable cytotoxicity against HepG2 cells, which demonstrates the great potential of the probe in selectively detecting Cys in vivo.
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CHEMOSPHERE
·
2018
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IF 4.427
Zongping Wang,Ying Wan,Pengchao Xie,Aijiao Zhou,Jiaqi Ding,Jingwen Wang,Li Zhang,Songlin Wang,Tian C. Zhang
The effects of ultraviolet/persulfate (UV/PS) pretreatment on ultrafiltration (UF) membrane fouling caused by typical natural organic matter (NOM) fractions including humic acid (HA), sodium alginate (SA), and bovine serum albumin (BSA) were investigated. UF membrane fouling during the filtration of different NOM fractions after UV/PS pretreatment was compared through the evaluation of normalized membrane flux decline and membrane fouling reversibility. The fouling mitigation mechanisms were investigated through the characterization of ultraviolet absorbance (UV 254 ), dissolved organic matter , zeta potential , particle size distribution , fluorescence excitation-emission matrix spectra, and fitness of four classic fouling models. Furthermore, the fouled membranes were characterized by Fourier-transform infrared spectroscopy and scanning electron microscopy. The results showed that UV/PS pretreatment significantly alleviated membrane fouling caused by HA, SA, and HA-SA-BSA mixture, and the fouling control performance improved at high PS doses. However, either UV alone or UV/PS pretreatment at low PS dose (10 mg/L) significantly aggravated BSA fouling with the normalized flux at the end of first filtration cycle being 8% and 15%, respectively. The increased particle size of BSA after UV/PS pretreatment was attributed to the formation of aggregates, which mainly accumulated in membrane pores and aggravated membrane fouling. Modeling results suggest that the mitigation of membrane fouling derived from SA and mixed organic fractions was primarily ascribed to the control of cake filtration, while the mitigation of HA fouling was attributed to the declined contribution of standard blocking.
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APPLIED CLAY SCIENCE
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2015
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IF 2.467
Canlin Zhang,Jianying Yu,Kai Feng,Lihui Xue,Dong Xie
Layered double hydroxides (LDH) surface modified by triethoxyvinylsilane (TEVS) was prepared and characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) and Ultraviolet and visible (UV–Vis) spectrophotometry . FTIR and XRD showed that TEVS has been successfully grafted onto the surface of LDH. Compared with LDH, the agglomeration between the TEVS surface modified LDH (TEVS-LDH) particles was obviously weakened according to SEM. UV–Vis reflectance and absorbance analyses indicated that TEVS-LDH possessed better UV reflectance and absorbance than that of LDH. Then the effects of TEVS-LDH and LDH on the physical and anti-aging properties of bitumen were thoroughly evaluated. The storage stability test showed that TEVS-LDH existed more stably than LDH in bitumen, which was due to the surface modification of LDH which improved the compatibility between LDH and bitumen. The results of physical properties tests showed that TEVS-LDH improved high-temperature behavior and had a less pronounced effect on the low temperature ductility of bitumen in contrast with LDH. Aging indices (viscosity aging index, softening point increment and ductility retention rate) and FTIR showed that TEVS-LDH exhibited better improvement than LDH on anti-ultraviolet aging of bitumen.
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Materials Today Sustainability
·
2024
·
IF 7.1
Jinhong Hao,Hanbin Liu,Shiyu Du,Huacui Xiang,Guodong Liu,Zhijian Li,Hongwei Zhou
The paper-based flexible electronic devices with the virtues of light weight, porousness, sustainability and low cost by paper-making technology, however its application may be restricted by the poor tolerance of water due to the abundance of hydroxyl group of cellulose fibers. The encapsulation of such device requires to keep its sustainability and match the high efficiency of paper-making industry. In this work, a series of biomass-derived and UV-curable dynamic polymers were synthesized using itaconic acid and binary alcohols as raw materials. The diglycidyl ethers were firstly synthesized through the substitution reaction between binary alcohols and epichlorohydrin . The oligomer was then prepared by ring-opening reactions between the diglycidyl ethers and glycidyl-methacrylate-modified itaconic acid precursor. The dynamic polymers were finally obtained from photo-initiated polymerization, of which the mechanical property was regulated by the length of the binary alcohols. It is found that the polymer from 1,10-decanol possessed the highest tensile strength of 5.8 MPa and biggest elongation at break of 4.1%. The polymer can be self-healed and recycled, and was proved to be used as a photoresist for printed circuit board (PCB). Furthermore, the polymer was successfully applied to encapsulation of paper-based flexible strain sensor, which exhibited hydrophobicity and significantly higher working stability under high humidity or human sweating condition. The strategy reported in this work may pave a way for the development of sustainable thermosetting polymers and sustainable flexible electronic devices with high performance.
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SPECTROSCOPY LETTERS
·
2025
·
IF 1.6
Jin Dangqin,Zhou Hui,Xiao Jiali,Gao Qin,Gong Aiqin
This study presents the development and validation of UV-spectrophotometry methods for the quantification of organophosphorus pesticide residues in fruits and vegetables based on solid phase extraction and the principle of enzyme inhibition of catalase. A silica gel modified with 3,3 ‘- dodecyl-1,1’ - di-1-vinylimidazolium bromide ionic liquid (Poly - (3,3 ‘- dodecane-1,1’ - bis-1-vinylimidazolium dibromide modified silica), Poly (DBVD) - Sil, is used as a solid-phase extraction adsorbent. At the same time, based on the principle of enzyme inhibition of catalase, bovine liver catalase was screened as the enzyme solution, and a rapid detection method for profenofos residue was established by solid-phase extraction UV-spectrophotometry by optimizing the reaction conditions. That CAT inhibited the oxidation of MB by H2O2, limited MB fading, and the degree of absorbance recovery was related to CAT activity. Profenofos has a significant inhibitory effect on catalase, with a decrease in absorbance values. The natural logarithm of profenofos is linearly related to the enzyme activity inhibition rate within the range of 0.001-5.0 mg/L, the linear regression equation is y = 0.0509x + 0.4341, with R2=0.9968, the detection limit (3s/k) is 3.1 × 10−4 mg/L. A standard recovery rate of 95.3% to 104.2% for profenofos. The results showed the method is simple, fast, precise, accurate, and has a low detection limit, meeting the needs of rapid detection of profenofos residues in fruits and vegetables.
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DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 9
·4325-4341
·
IF 3.5
P. J. Xia,X. Z. Zheng,L. Yue,Y. F. Lei,M. Xu,W. B. Dai
For further development of light sources, white light-emitting diodes (wLEDs) have attracted widespread attention as promising next-generation light sources fabricated via the combination of phosphors and LED chips. However, latent defects, such as chemical/thermal instability, low color rendering index (CRI) and high correlated color temperature (CCT), of current mainstream wLEDs seriously hinder their further large-scale implementation. Herein, in order to overcome these limitations, single-phase color-tunable gaudefroyite (Ca3Y(GaO)3(BO3)4 (CYGB)) tridoped with Bi3+/Tb3+/Eu3+ ions was synthesized for the first time and detailed characterisation was performed via high-temperature solid-state reaction and structural/spectral analyses, respectively. Radius difference percentage calculations and Rietveld refinements indicate that dopants occupy both Y3+ and Ca2+ sites but preferably the Y3+ site over the Ca2+ site due to the same valence state. Through subtly regulating the (co)doping contents and skillfully utilizing the energy transfer (ET) strategy from the allowed transition of blue light-emitting Bi to the forbidden transition of green/red light-emitting Tb/Eu, the color hue (including white light) of highly efficient PL can be easily tuned according to the need. Meanwhile, composition/content-optimized white light-emitting CYGB:2%Bi/10%Tb/12%Eu also shows splendid chemical/thermal stability. Finally, as a proof-of-concept experiment, the CYGB:2%Bi/10%Tb/12%Eu phosphor-converted wLED (pc-wLED) was fabricated and encapsulated via the up-to-date remote ‘capping’ method, which imparted attractive performances. Altogether, the stable CYGB:Bi/Tb/Eu phosphor is a promising candidate for application in lighting/display fields.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Xiaolong Li,Yulu Tang,Jundi Wan,Yahui Zhang,Dongjun Lv,Mingyuan Guo,Yongning Ma,Yuhao Yang
UV–vis–NIR photodetectors are of great importance to extensive applications, while they are limited by the low photon utilization and narrow light response range inherent in a single material. To overcome these limitations, we propose the construction of heterojunction photosensitive materials featuring a hollow structure. In this study, Y-type titanylphthalocyanine nanoparticles (Y-TiOPc NPs) and hollow ZnS nanotubes (ZnS NTs) are employed to fabricate a bulk heterojunction photosensitive material (Y-TiOPc NPs:ZnS NTs). This composite material exhibits a significant cavity enhancement effect, resulting from multiple light reflections and outstanding light absorption spanning from 365 to 1060 nm. The photodetector based on Y-TiOPc NPs:ZnS NTs (referred to as Y:ZT-PD) demonstrates remarkable photodetection capabilities, including photomultiplication phenomena. Specifically, it achieves a high external quantum efficiency of 24042%, an impressive photoresponsivity (R) of 101967 mA/W, and an excellent specific detectivity (D*) of 1.56 × 1012 Jones at 0.01 mW/cm2. Additionally, the multiperiod time-resolved photocurrent response curves exhibit rapid and stable responses across different wavelengths. Characterization results indicate that these exceptional performances primarily arise from the cavity enhancement effect of ZnS NTs and the hole-injection effect resulting from interfacial trapped electrons. Consequently, the outstanding performance, coupled with the broad spectral range and stability, positions the hollow bulk heterojunction as a promising material for the next generation of broadband photodetectors.
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PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Chijia Wang,Shun Zhang,Siqiao Feng,Shuyi Liu,Haonan Liu,Qianqian Yin,Zihua Wang,Zhanjian Liu,Huaiyuan Wang
In recent years, the impact of filler surface groups on the protective qualities of epoxy resin coatings has garnered significant attention. This study has centered on the hydrophobic modification of mica fillers using fluorosilane (PFDTMS). Subsequently, the photocatalytic properties of titanium black (B-TiO 2 ) and Cobalt tetroxide (Co 3 O 4 ) were utilized to deposit hydroxyl radicals onto the fluorosilane surface, resulting in a configuration where hydrophilic groups encapsulate hydrophobic groups on the exterior of the filler. Furthermore, the study aimed to evaluate the anti-corrosion and wear resistance of these composite coatings under high-pressure CO 2 conditions. After undergoing a 72-hour high-pressure CO 2 corrosion test, the EP/UV-F/B-TiO 2 /Mica/Co 3 O 4 composite coating retained a substantial impedance modulus value of 3.648 × 10 9 Ω/cm 2 at 0.01 Hz, whereas the pure epoxy resin coating exhibited detachment and cracking from the substrate. These observations indicate that the epoxy composite coating, featuring its distinctive hydrophilic-hydrophobic configuration, possesses exceptional long-term corrosion resistance. In conclusion, this research presents encouraging prospects for the development of mica-based, resilient anti-corrosive fillers.
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