ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2022
·Vol. 29
·期 59
·88882-88893
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IF 5.19
Wang Yinghui,Chen Yuantao,Zhao Meng,Zhang Lili,Zhou Changyou,Wang Haiyang
Radioactive iodine in nuclear waste is increasingly harmful to the human body and the environment because of its strong radioactivity, high fluidity, easy solubility in water, and long half-life. It is very important to find clean and economical materials to recover and fix radioactive iodine. In this paper, the amino-metal-organic framework was covalently modified to obtain composite materials to improve the recycling of iodine in the environment. These adsorbents are used to adsorb iodine in water, showing outstanding adsorption performance. The adsorption data are in good agreement with the Langmuir isothermal adsorption model and pseudo-second-order kinetic model, indicating that the adsorption process is mainly monolayer adsorption and chemical adsorption. The two materials showed selective adsorption capacity for iodine in the solution containing multiple competing ions. The adsorption capacity of the covalently modified composite increased from 949.52 to 2157.44 mg/g. Compared with the amino-metal-organic framework, the modified composite contains more electron-rich groups as active sites, and forms charge transfer compounds with iodine to realize chemical adsorption. Through the simulated adsorption of ultra-high-pressure micro-jet, the material has certain working ability under high pressure, which provides a theoretical basis for the future recovery and utilization of iodine under high pressure. Graphical abstract
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Advanced Energy Materials
·
2022
·Vol. 12
·期 25
·2200974
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IF 29.698
Liming Dai,Fanglei Yao,Lei Yu,Chenchen Fang,Jing Li,Liang Xue,Shengli Zhang,Pan Xiong,Yongsheng Fu,Jingwen Sun,Junwu Zhu
An interstitial vacancy on molybdenum nitride has been determined as a negative factor towards the alkaline hydrogen evolution reaction (HER) by reason of upraising the d orbitals of Mo. Nevertheless, investigations aiming to eliminate the vacancies are rarely reported. Here, an interstitial reconfiguration method for the design of stoichiometric molybdenum carbonitride (Mo 2 CN) is proposed, in which the vacancies are fulfilled by lattice carbon. Multiple fine structural analyses alongside with the theoretical calculations indicate that beyond lower the d orbitals of Mo by the hybridization of additive p-d orbitals, lattice carbon also behaves as the extra active center with exceptional H adsorption/desorption energy. Mo 2 CN reveals an adorable overpotential of − 84 mV at a current density of 10 mA cm −2 with a long-term electrochemical stability by accompanying the nitrogen-doped carbon substrate. It is anticipated that the vacancy-eliminating concept will provide a constructive entry point for the rational design of electro-catalysts and beyond.
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MICROCHEMICAL JOURNAL
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2022
·
IF 5.304
Zhizhou Liu,Tong Wang,Liang He,Xueyan Nan,Xuming Sun,Pengli Bai
Bacillus anthracis, an extremely dangerous bacterium which can cause pulmonary anthrax and be used as biochemical weapon agent, can be detected by the detection of its major biomarker 2, 6-pyridine dicarboxylic acid (DPA). Herein, we reported the solvothermal synthesis of a non-luminescent NH 2 -BDC-Eu-MOF using Eu 3+ and 2-aminoterephthalic acid (NH 2 -BDC). The emission of amino ligand and Eu 3+ ions are absent in ethanol while the addition of DPA could recover both emission at 460 and 624 nm respectively. Thus this MOF can act as a dual emission ‘‘turn-on’’ probe for DPA detection. The detection limits (LOD) of this DPA probe are about 0.8 μM in ethanol and 0.36 μM in water, which are much lower than an infectious dosage of bacillus anthracis spores (60 μM) for human being. In order to monitor DPA levels more conveniently, we developed a one-to-two decoder logic gate operation, which can determinate DPA via color discrimination.
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Nanomaterials
·
2022
·Vol. 12
·期 18
·3089
·
IF 5.719
Li Tan,Yiming Chen,Didi Li,Shaobin Wang,Zhimin Ao
An in situ photo-Fenton system can continuously generate H2O2by photocatalysis, activating H2O2in situ to form strong oxidizing ·OH radicals and degrading organic pollutants. A WSe2/g-C3N4composite catalyst with WSe2as a co-catalyst was successfully synthesized in this work and used for in situ photo-Fenton oxidation. The WSe2/g-C3N4composite with 7% loading of WSe2(CNW2) has H2O2production of 35.04 μmol/L, which is fourteen times higher than pure g-C3N4. The degradation efficiency of CNW2 for phenol reached 67%. By constructing an in situ Fenton-system, the phenol degradation rate could be further enhanced to 90%. WSe2can enhance the catalytic activity of CNW2 by increasing electron mobility and inhibiting the recombination of photogenerated electron–hole pairs. Moreover, the addition of Fe2+activates the generated H2O2, thus increasing the amount of strong oxidative ·OH radicals for the degradation of phenol. Overall, CNW2 is a promising novel material with a high H2O2yield and can directly degrade organic pollutants using an in situ photo-Fenton reaction.Keywords:WSe2/g-C3N4;visible light;in situ photo-Fenton;phenol degradation
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Yun Xing,Xin Tang,Chengshuang Ling,Yu Zhang,Zhiyuan He,Guangying Ran,Huimin Yu,Ke Huang,Zhirong Zou,Xiaoli Xiong
Transition metal selenides are widely used in electrocatalysis on account of high electrical conductivity , good stability and low cost. In this study, using nickel-cobalt layered double hydroxide (NiCo-LDH) as precursor, a simple two-step method was used to prepare three-dimensional (3D) Setaria viridis-like NiCoSe 2 nanoneedles arrays on nickel foam (NiCoSe 2 NNA/NF). Benefiting from the abundant catalytic active sites provided by the 3D nanoneedles array structure, the covalent reciprocity between Ni, Co and Se can effectively facilitate the free movement of ions and electrons on the electrode surface. As a hydrazine sensor, the electrochemical performance of the NiCoSe 2 NNA/NF was studied by cyclic voltammetry (CV) and other electrochemical techniques , which exhibits outstanding electrocatalytic performance. When the signal-to-noise ratio is 3 (S/N = 3), the sensitivity is 16170 μA mM −1 cm −2 , the lower detection limit is 0.5 μM. It also shows well anti-interference and long-term stability. In addition, the successful applications in water environments samples also demonstrated the feasibility of the sensor. This method provides a new idea for the development of selenide-based electrochemical sensors .
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JOURNAL OF BIOMATERIALS APPLICATIONS
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2022
·
IF 2.712
Shuang Yang,Linhao Lan,Mingda Gong,Ke Yang,Xiaoming Li
An effective dressing is essential for wound healing. In fact, the wettability performance is one of the most important factors of a wound dressing. The fundamental functions of a wound dressing involve the absorption of excess exudates and maintenance of optimal moisture at the wound by controlling water evaporation. Here, we designed a type of chitosan (CS) sponge and PCL nanofibrous membrane composite dressing with asymmetric wettability surfaces as wound healing materials for biomedical applications. The hydrophobic surfaces of the composite dressing were waterproof and could efficiently control the water vapor transmission rate, whereas the hydrophilic surface of the CS sponge had good cytocompatibility and water-absorbing capability. Insulin-like growth factor-2 (IGF-2) was added to the CS sponge, and exhibited a stimulatory effect on fibroblasts migration and proliferation. Therefore, the fabricated CS sponge and PCL membrane composite dressing had excellent cytocompatibility, vapor transmission rate, and liquid absorption and asymmetric wettability, suggesting its potential as a promising alternative to traditional wound dressing.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Yan Wang,Tao Yang,Jing Chen,Shaobin Wen,Die Li,Bingyu Wang,Qiang Zhang
A novel ferrocene-based nanofiltration membrane is prepared to combine filtration and photo-Fenton reaction for water treatment. Membranes containing ferrocene groups are successfully fabricated via an integration of layer-by-layer interfacial polymerization and ion exchange reaction. Rejection performance towards bisphenol S (BPS) increases with the growth of the interfacial polymerization layer, and the optimal membrane shows the highest rejection rate of 98.1%. For the optimal photo-Fenton system with H 2 O 2 , UV and ferrocene-based membrane (PS/HTCC-3/FcSO 3 ), the degradation rate of k is 0.092 min −1 , which is 1.8 times higher than that of the system with only H 2 O 2 and UV. Meanwhile, the salinity of BPS in the optimal system is 2 times higher than that of the system with H 2 O 2 and UV. After the heterogeneous photo-Fenton process, PS/HTCC-3/FcSO 3 can reject 65.6% of the BPS degradation by-products based on the variation of total organic carbon (TOC). In addition, quenching experiments prove that ·OH is the primary active radical, and the yield of ·OH in the optimal system is the highest compared with the system with H 2 O 2 and UV. The outstanding performance of ferrocene-based membrane demonstrates its potential for micropollutants treatment.
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MOLECULAR PHARMACEUTICS
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2022
·
IF 5.364
Xiaozhu Chen,Hong Zhang,Chu Wang,Yue Su,Min Xiong,Xiaohua Feng,Daishi Chen,Zhaoyang Ke,Lu Wen,Gang Chen
Overexpression of apoptotic factors in the inner ear is generally proven to induce ototoxicity. This has aroused research interest in various antiapoptotic drugs, the most representative of which is curcumin (CUR). In this study, two nanoformulations of CUR were developed with sustained-release behavior to improve their protective effects against ototoxic hearing loss (HL), which were the nanoparticles of CUR-loaded poly(lactic acid–glycolic acid) (CUR-PLGA NPs) and CUR-loaded chitosan-coated PLGA NPs (CUR-CS/PLGA NPs). The obtained results revealed that both CUR-NPs provided otoprotection in vitro and in vivo, and their effective doses in guinea pigs were much less than that of dexamethasone, which was clinically used to treat HL. Moreover, relative to CUR and CUR-PLGA NPs, CUR-CS/PLGA NPs exhibited the highest accumulation in HEI-OC1 cells and guinea pigs’ cochlea. In pharmacodynamic experiments, the optimal administration timing was investigated, and CUR-CS/PLGA NPs showed sustained efficacy and the best hearing improvement at all tested sound frequencies. Lastly, the protective effect of CUR nanoformulations was further validated via inhibition of Caspase-3 and Bax activation, thereby reducing the concentration of reactive oxygen species and protecting mitochondrial integrity in hair cells. Collectively, CUR-CS/PLGA NPs demonstrated potent and lasting effects against ototoxic HL, making our novel formulation a promising candidate for the alleviation of sensorineural HL.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 24
·19331-19343
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IF 2.779
Li Weiyin,Zhao Tongtong,Ding Lingling
Au@BSA was prepared at pH 8, pH 9, pH 10, pH 11, pH 11.4, and pH 12 as the working electrode of the non-enzymatic glucose sensor by biological template method. The six kinds of gold-cluster film working electrodes sintered by Au@BSA show golden color, especially the golden films corresponding to pH 8 and pH 12 are obvious. The gold-cluster films at pH 8, pH 9, pH 10, and pH 11 showed mono-layer gold nanoparticles, while the gold-cluster film at pH 11.4 showed porous structure. The gold-cluster film prepared at pH 12 presents a multi-layer 3D structure composed of a large number of gold nanoparticles. The linear detection range of the non-enzymatic glucose sensor prepared at pH 8 is the widest among the six sensors, and its sensitivity is also better than the other four sensors except the sensor prepared at pH 12. The sensor with the gold-cluster film-modified working electrode prepared at pH 12 show the highest sensitivity (330.002 μA mM −1 cm −2 ), because multi-layer 3D structure can bring more electric catalytic active site for this sensor. The electrochemical impedance spectroscopy showed that the specific surface area of the sensor prepared at pH 12 was much larger than that of the other five sensors. We provide a pH cycling method for once shaping preparation that can be extended to other metal films or metal-oxide films electrochemical interfaces. The Au@BSA non-enzymatic glucose sensor prepared in this paper is stable and can resist the toxicity of excessive chloride ions without losing activity.
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CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Xu Zhang,Bowen Tan,Yanting Wu,Min Zhang,Xi Xie,Jinfeng Liao
Hydrogels can mimic extracellular matrix and provide a suitable microenvironment for accelerating wound healing. Nevertheless, the complicated wound condition, the disturbance of external forces, and the manufacturing process of the dressing were still difficult problems. An injectable self-healing hydrogel with mild photothermal therapy (MPTT) was developed for wound healing via dynamic Schiff bonds. After covalently incorporating GO-BPEI (branched polyethyleneimine grafting graphene oxide), an observable mechanical strength improvement and photothermal conversion property of GO-BPEI/carboxymethylated chitosan (CMCS) /aldehyde terminated polyethylene glycol (PEG-CHO) (GCP) hydrogel has been witnessed. MPTT induced by near-infrared (NIR) irradiation could accelerate NIH-3 T3 cells proliferation in vitro . Moreover, in vivo wound defect healing and histological analysis suggested that GCP hydrogels incorporated with MPTT significantly accelerated wound healing by improving collagen fibers deposition, enhancing re-epithelialization, and promoting granulation tissue neogenesis. The GCP hydrogels provide a unique route for wound dressing and present new inspirations for complicated wound management.
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Catalysts
·
2022
·Vol. 12
·期 8
·901
·
IF 4.501
Huaigang Su,Ze Zong,Wenjing Lou,Qin Zhao,Xiaobo Wang,Xiang Feng,Yanxing Qi,Zhaoning Song
In this study, Zr active species were implanted into a ZSM-5 zeolite framework to form a solid acid catalyst through steam treatment and the liquid-solid isomorphous substitution process. The as-synthesized Zr-ZSM-5-st catalyst ensured excellent esterification of trimethylolpropane and fatty acids (FAs) to achieve a polyol ester production yield of 94.41%. Combined with N2physisorption, X-ray diffraction, Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, transmission electron microscopy mapping, X-ray photoelectron spectroscopy, NH3temperature-programmed desorption, and inductively coupled mass plasma spectroscopy were conducted. The results revealed that the excellent performance of Zr-ZSM-5-st catalyst could be attributed to the enhanced acidity and the developed surface area and pore structure.Keywords:Zr-containing solid acid catalyst;ZSM-5 zeolite;polyol ester;esterification;lubricating ester oils
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Environmental Science-Nano
·
2022
·Vol. 9
·期 9
·3407-3416
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IF 9.473
Han Song,Xinwen Ou,Mengye Wang,Yan Zhang,Zhang Lin
H2 production during the transformation of Fe(OH)2 into magnetite (i.e., Schikorr reaction), has a significant impact on many environmental applications, including the long-term effectiveness of permeable reactive barriers composed of zerovalent iron and the stability of geological radioactive waste repository. However, the reactivity of the Schikorr reaction is not systematically evaluated and its chemical mechanism still remains controversial. Here, we investigate water reduction on the Fe(OH)2 surfaces with the help of an interface-reaction model between water and Fe(OH)2. The Fe(OH)2 hexagonal nanosheets prepared using a coprecipitation method possess dominantly exposed (001) and (100) facets. As unveiled by the DFT simulations, the (001) Fe(OH)2 facet only exposes OH, which is, therefore, inert to water reduction. Moreover, the active Fe-exposed (100) Fe(OH)2 facet is more thermodynamically favourable for water adsorption and dissociation than the (101) and (102) facets. However, the high energy barrier for water dissociation (2.79 eV) may restrict the rate of water reduction on the Fe(OH)2 facet. In addition, the capacity of (100), (101), and (102) Fe(OH)2 facets to adsorb OH− is stronger than that for H2O, which further inhibits water reduction. Furthermore, DOS calculations manifest that Fe d orbitals play a significant role in H2O adsorption, indicating that manipulating the electronic structure of the Fe site is a critical path to mediate water reduction in Fe(OH)2. Our study provides new insights into the understanding of the mechanism of the phase transformation of Fe(OH)2 under anaerobic conditions in environmental and earth sciences.
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