WATER AIR AND SOIL POLLUTION
·
2023
·Vol. 234
·期 4
·1-13
·
IF 2.9
Ma Lijuan,Linghu Shanshan,Chen Zhichong,Wang Shuoyuan,Gu Hao,Pan Tao,Chen Xiurong
The diffusion of odour caused by excavation disturbance during the restoration of pesticide sites adversely affects the surrounding environment. Therefore, it is essential to develop a new type of odour inhibitor that has both adsorption and oxidation functions and can effectively block odour. In this study, bentonite-modified cetyltrimethyl ammonium bromide (CTAB) was synthesised, and the structural changes of bentonite before and after modification were analysed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and other characterisation methods. Urea peroxide was loaded on modified bentonite (150C-Bent) by in situ synthesis method, and the preparation conditions were optimised. The effects of temperature, humidity and species on the adsorption behaviour and adsorption kinetics were studied by adsorption experiments. It is demonstrated that CTAB is embedded in bentonite through ion exchange, and the interlayer spacing expands from 1.42 to 3.11 nm. The optimal loading mass ratio of modified bentonite to urea peroxide was 1:1.5 and pH was 3. When the relative humidity is 54.3% and the temperature is 55 °C, the removal effect of paraxylene is the best; the optimal removal reached 82.4%. The adsorption behaviour of 1.5UHP-Bent conforms to the pseudo-second-order kinetic adsorption model. The adsorption pathway of paraxylene on UHP-Bent mainly includes partition effect and hydroxyl radical capture.
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-10
·
IF 16.6
Wang Yi,Yang Rong,Ding Yajun,Zhang Bo,Li Hao,Bai Bing,Li Mingrun,Cui Yi,Xiao Jianping,Wu Zhong-Shuai
Exploring durable electrocatalysts with high activity for oxygen evolution reaction (OER) in acidic media is of paramount importance for H 2 production via polymer electrolyte membrane electrolyzers, yet it remains urgently challenging. Herein, we report a synergistic strategy of Rh doping and surface oxygen vacancies to precisely regulate unconventional OER reaction path via the Ru–O–Rh active sites of Rh-RuO 2 , simultaneously boosting intrinsic activity and stability. The stabilized low-valent catalyst exhibits a remarkable performance, with an overpotential of 161 mV at 10 mA cm −2 and activity retention of 99.2% exceeding 700 h at 50 mA cm −2 . Quasi in situ/operando characterizations demonstrate the recurrence of reversible oxygen species under working potentials for enhanced activity and durability. It is theoretically revealed that Rh-RuO 2 passes through a more optimal reaction path of lattice oxygen mediated mechanism-oxygen vacancy site mechanism induced by the synergistic interaction of defects and Ru–O–Rh active sites with the rate-determining step of *O formation, breaking the barrier limitation (*OOH) of the traditional adsorption evolution mechanism.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 19
·56188-56197
·
IF 5.8
Chen Jingwen,Wu Menglin,Ni Jiupai,Ni Chengsheng
Photocatalysis using the visible light of the sun is an environmentally friendly method of eliminating the NOx pollutant from the ambient air. Although Cs 3 Bi 2 Br 9 , a semiconductor with a band gap of 2.54 eV, may be a strong absorber of visible light, its photocatalysis towards the abatement of NOx is unknown. In this study, Cs 3 Bi 2-x Pb x Br 9-x (0 ≤ x ≤ 0.0789) are used for the photocatalytic oxidation of NOx. A significant NO oxidation efficiency (80%) is observed over Cs 3 Bi 2-x Pb x Br 9-x (x = 0.0443) under visible light, which is attributable to the Br vacancy ( V Br ) brought about by Pb 2+ doping. The presence of V Br increased the ionic selectivity of in the oxidized NO. At higher Pb doping level, two HONOs adsorbed on the V Br , linked, and then reduced by hot electrons to produce N 2 O 2 2− . The di-azo coupling could passivate the activation of NO on the V Br . This work advances the defect engineering of halide for the photo-driving solid–gas reaction in air.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2023
·Vol. 21
·期 1
·1-20
·
IF 10.2
Li Jiaxin,Li Weichang,Kong Mengjie,Li Zongtai,Yang Tao,Wang Qinmei,Teng Wei
Guided bone regeneration (GBR) is widely used in treating oral bone defects to exclude the influence of non-osteogenic tissue on the bone healing process. The traditional method of GBR with a titanium mesh to treat large-area bone defects is limited by the deficiency of increased trauma and costs to patients. Herein, a bi-layered scaffold for GBR composed of a fiber barrier layer and a self-healing hydrogel repair layer is successfully fabricated. The barrier layer is a fibrous membrane material with specific porosity constructed by electrospinning, while the functional layer is a self-healing hydrogel material formed by multiple dynamic covalent bonds. The system can provide an osteogenic microenvironment by preventing the infiltration of connective tissue to bone defects, maintain the stability of the osteogenic space through the self-healing property, and regulate the release of bioactive substances in the dynamic physical condition, which is beneficial to osteoblast proliferation, differentiation, and bone regeneration. This study focused on exploring the effects of different crosslinkers and bonding methods on the comprehensive properties of hydrogels. and proved that the hybrid scaffold system has good biocompatibility, cell barrier function and can enhance bone regeneration activity. Thereby it could be a promising clinical strategy for bone regeneration.
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FIBERS AND POLYMERS
·
2023
·Vol. 24
·期 3
·885-892
·
IF 2.5
Du Qiuping,Yu Jiajing,Xu Xianlin,Xia Lei,Zhuang Xupin
Developing a reusable, low cost and biodegradable oil absorption material with high capacity remains a challenge. Herein, we demonstrate a facile and reliable methodology to construct a hydrophobic cellulose sponge from cellulose xanthate by regenerating cellulose and surface silanization using methyl trichlorosilane. The cellulose sponge presents high porosity of up to 87.46% which could be regulated with p-Toluenesulfonyl hydrazide. The sponge exhibits excellent structure stability, which could complete recovery from 90% compression strain and high durability (60 cycles at 90% stain). With a hydrophobic surface, it presents a high absorption capacity of over 30 times its weight for oils and organic solvents, indicating promising application in oil and water separation.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
·
2023
·Vol. 34
·期 2
·1-12
·
IF 3.7
Wang Yixi,Ding Chuanyang,Ge Zhangjie,Li Zhipeng,Chen Lixin,Guo Xiaolong,Dong Genxi,Zhou Ping
Many kinds of antibacterial coatings have been designed to prevent the adherence of bacteria onto the surface of a fixed orthodontic device of brackets. However, the problems such as weak binding force, undetectable, drug resistance, cytotoxicity and short duration needed to be solved. Thus, it has great value in developing novel coating methods with long-term antibacterial and fluorescence properties according to the clinical application of brackets. In this study, we synthesized blue fluorescent carbon dots (HCDs) using the traditional Chinese medicinal honokiol, which could cause irreversible killing effects on both gram-positive and gram-negative bacteria through positive charges on the surface and inducing reactive oxygen species (ROS) production. Based on this, the surface of brackets was serially modified with polydopamine and HCDs, taking advantage of the strong adhesive properties as well as the negative surface charge of polydopamine particles. It is found that this coating exhibits stable antibacterial properties in 14 days with good biocompatibility, which can provide a new solution and strategy to solve the series of hazards caused by bacterial adhesion on the surface of orthodontic brackets. Graphical Abstract
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Advanced Fiber Materials
·
2023
·Vol. 5
·期 3
·1008-1024
·
IF 16.1
Wang Qianyi,Ran Xinyue,Wang Jian,Wang Sinan,Zhang Peiling,Gao Erji,Bai Baoshuai,Zhang Junfeng,Zhou Guangdong,Lei Dong
Tissue engineering provides a promising approach for regenerative medicine. The ideal engineered tissue should have the desired structure and functional properties suitable for uniform cell distribution and stable shape fidelity in the full period of in vitro culture and in vivo implantation. However, due to insufficient cell infiltration and inadequate mechanical properties, engineered tissue made from porous scaffolds may have an inconsistent cellular composition and a poor shape retainability, which seriously hinders their further clinical application. In this study, silk fibroin was integrated with silk short fibers with a physical and chemical double-crosslinking network to fabricate fiber-reinforced silk fibroin super elastic absorbent sponges (Fr-SF-SEAs). The Fr-SF-SEAs exhibited the desirable synergistic properties of a honeycomb structure, hygroscopicity and elasticity, which allowed them to undergo an unconventional cyclic compression inoculation method to significantly promote cell diffusion and achieve a uniform cell distribution at a high-density. Furthermore, the regenerated cartilage of the Fr-SF-SEAs scaffold withstood a dynamic pressure environment after subcutaneous implantation and maintained its precise original structure, ultimately achieving human-scale ear-shaped cartilage regeneration. Importantly, the SF-SEAs preparation showed valuable universality in combining chemicals with other bioactive materials or drugs with reactive groups to construct microenvironment bionic scaffolds. The established novel cell inoculation method is highly versatile and can be readily applied to various cells. Based on the design concept of dual-network Fr-SF-SEAs scaffolds, homogenous and mature cartilage was successfully regenerated with precise and complicated shapes, which hopefully provides a platform strategy for tissue engineering for various cartilage defect repairs. Graphical Abstract
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 17
·51061-51074
·
IF 5.8
Zheng Siheng,Sheng Feng,Gu Cheng,Li Yanying,Fang Zhou,Luo Jun
Triazines are frequently detected in nature water and agricultural soils worldwide. They are considered harmful to plants, animals, and the human health. In this study, diffusive gradients in thin films (DGT) method was developed for the assessment of several triazines. DGT device was used for the in situ measurement of atrazine in a pesticide factory and obtained reliable data. The atrazine concentrations measured by DGT, and solvent extraction method was in a constant ratio. The DIFS model was coupled with DGT technique to study the desorption kinetics of atrazine in four kinds of different soils. The yellow–brown soil was more inclined to adsorb atrazine than other three soils. 2_D DIFS model was used to obtain the partition coefficient for labile atrazine ( K dl ), the values of the response time ( T c ), and desorption/adsorption rates ( k 1 and k −1 ). The yellow–brown soil has a larger labile pool size, and a faster resupply speed of atrazine. The 1_D DIFS model was used to simulate the profiles of atrazine concentrations in soil solution and solid phase. The results show that the desorption of atrazine in soil was limited by kinetic limitation at short time, and was limited by the solid phase reservoir at long time.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 17
·50815-50828
·
IF 5.8
Chen Chen,Sun Hao,Zhang Shengyu,Su Xiaosi
In this study, stalk biochar (BC) was prepared by a high-temperature pyrolysis process and used as a non-metallic catalyst to activate peroxydisulfate (PDS) to degrade tetracycline hydrochloride (TCH). Various characterization results showed that BC had a hollow tubular structure, irregular folds, and important active sites such as oxygen-containing functional groups. Under the optimal reaction conditions, the degradation rate of TCH reached 98.1% within 120 min. In addition, the degradation performance was satisfactory and similar under acidic and near neutral pH, and higher temperature promoted the degradation of TCH. The SO 4 · − , ·OH, and 1 O 2 generated by PDS activation were reactive oxygen species (ROS), which degraded TCH through free radical/non-radical synergistic pathways. Quenching experiments proved that the generated SO 4 · − and ·OH might be the dominant reactive oxygen species (ROS) during the oxidative reaction. The research results will provide a theoretical basis for the application of PDS activated by non-metallic catalysts in the remediation of tetracycline antibiotics pollution.
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JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 14
·6220-6236
·
IF 4.5
Qu Mengnan,Yan Jufeng,Ge Jianwei,Zhao Yue,Xue Yuyu,Liu Xiaofeng,Liu Hui,Yan Min,He Jinmei
Interfacial solar evaporation technology is considered as one of the most promising green ways to solve the problems of freshwater scarcity and sewage treatment. Herein, we prepared a low-cost, easy-to-fabricate, and excellent performance polyaniline (PANI)-wood solar evaporator using a simple surface self-assembly technique. The evaporator achieves an evaporation rate of 1.66 kg m −2 h −1 under 1 sun and a photothermal conversion efficiency of 86.9%. In the process of seawater desalination, the purification rate of four ions in seawater reaches at least 99%. And water purified by evaporator meets the drinking water standard of the World Health Organization (WHO). In the experiment of evaporating organic dye aqueous solution, the light transmittance of the purified water is similar to that of deionized water. These performances are higher than those of most reported wood-based solar evaporators. Therefore, the efficient solar evaporation system has great potential in addressing desalination and water purification. Graphical abstract
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 9
·1-13
·
IF 2.8
Lu P. A.,Manikandan M. R.,Yang P. F.,He Y. L.,Yang F.,Dang S. T.,Shi Y. C.,Lou W. B.,Liu R.,Wu S. J.,Li X. F.,Hu Y. C.,Shang J.,Yin S. Q.,Wang X. W.
The development of iron-based supercapacitors has been gaining more attention in the field of energy storage applications due to their non-toxicity, abundance and low cost. In this paper, single phase hematite nanoparticles were synthesized by high temperature thermal decomposition method and directly served as electrochemical supercapacitor electrode material. Structural study (XRD) revealed the single-phase hematite nanoparticles formation with trigonal alpha-Fe 2 O 3 structure. Morphological study (SEM) confirms silkworm chrysalis shape like morphology by many interconnected nanoparticles of the average size of 30 nm. The electrochemical study indicates that the synthesized hematite electrode material can maintain good farad capacitance at 100 mV/s and it shows a specific capacitance of 149.3 F/g at a current density of 1 A/g with the maximum energy and power densities of 4.20 Wh/Kg and 224.90 W/Kg, respectively. Equivalent series resistance and charge transfer resistance of alpha-Fe 2 O 3 electrode material are 1.079 Ω and 9.055 Ω, respectively. This is attributed to the alpha-Fe 2 O 3 nanostructure, which can provide a large contact area between electrode and electrolyte for ionic reaction and transport. The material can still retain 43.8% of the initial specific capacitance after 5000 cycles. The investigation results show that the hematite nanoparticle-based electrode material holds great potential in electrochemical supercapacitors and provides a certain reference in the direction of global energy needs.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 9
·1-10
·
IF 2.8
Wu Hao,Li Jie,Han Xuening,Li Wei,Sun Kai,Chen Yixin,Yan Yang,Chen Daming
In-substituted YIG ferrite (Y 3 Fe 5 − x In x O 12 ) materials were prepared by citrate nitrate sol–gel method. Phase formation, microstructure, and magnetic properties were investigated, and the effects of In-substitution were discussed detailed. X-ray diffraction results showed the In-substitution did not change the phase formation of YIG ferrite, but cause the lattice constants change slowly. Scanning electron microscopy showed the materials prepared by sol-gel method had small gain size, and In 3+ enhanced grain growth. The high-substituted content had pores among grain boundaries, which was an influence factor on magnetic property. With In-substituted increase, saturation magnetization ( σ ) increased from 21.77emu/g ( x = 0.0) to 26.94 emu/g (4π M S =1639.2 Gs) when x = 0.4, and then decreased to 20.27 emu/g (4π M S =1230.0 Gs, x = 0.5). Meanwhile, the coercivity ( H C ) decreased from 12.3 Oe to 12.1 Oe ( x = 0.3) and then increased to 13.6 Oe ( x = 0.5). For ferromagnetic resonance (FMR) linewidth (Δ H ), the narrow FMR value was Δ H = 62.82 Oe at x = 0.4. The anisotropy linewidth Δ H a and porosity linewidth Δ H p were mainly influence factors on linewidth of materials, and the magnetism was discussed detailed. The narrow FMR linewidth and high saturation magnetization suggested the possible use of these materials in high-frequency microwave applications.
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