ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2023
·
IF 5.8
Wang Hongqiang,Huang Sheng,Liao Lei,Mo Shengpeng,Zhou Xiaobin,Fan Yinming
Replacing NH 3 in NH 3 -SCR with VOCs provides a new idea for the simultaneous removal of VOCs and NO x , but the technology still has urgent problems such as high cost of catalyst preparation and unsatisfactory catalytic effect in the low-temperature region. In this study, biochar obtained from sewage sludge calcined at different temperatures was used as a carrier, and different Co and Mn injection ratios were selected. Then, a series of sludge-based biochar (SBC) catalysts were prepared by a one-step hydrothermal synthesis method for the simultaneous removal of acetone and NO in a low-temperature photothermal co-catalytic system with acetone replacing NH 3 . The characterization results show that heat is the main driving force of the reaction system, and the abundance of Co and Mn atoms in high valence states, surface-adsorbed oxygen, and oxygen lattice defects in the catalyst are the most important factors affecting the performance of the catalyst. The performance test results showed that the optimal pyrolysis temperature of sludge was 400 °C, the optimal dosing ratio of Co and Mn was 4:1, and the catalyst achieved 42.98% and 52.41% conversion of acetone and NO, respectively, at 240 °C with UV irradiation. Compared with the pure SBC without catalytic effect, the SBC loaded with Co and Mn gained the ability of simultaneous removal of acetone and NO through the combined effect of multiple factors. The key reaction steps for the catalytic conversion of acetone and NO on the catalyst surface were investigated according to the Mars-van Krevelen (MvK) mechanism, and a possible mechanism was proposed. This study provides a new strategy for the resource utilization of sewage sludge and the preparation of photothermal catalysts for the simultaneous removal of acetone and NO at low cost.
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International Journal of Minerals Metallurgy and Materials
·
2023
·
IF 4.8
Zhao Xu,Zhong Shoudeng,Wang Shuqi,Li Shaozhen,Wu Sujuan
The commercialized poly(3,4-ethylenedioxythiophene):poly (styrenesulfonate) (PEDOT:PSS) is usually used as hole transport layers (HTLs) in tin-based perovskite solar cells (TPSCs). However, the further development has been restricted due to the acidity that could damage the stability of TPSCs. Although the PEDOT:PSS solution can be diluted by water to decrease acidity and reduce the cost of device fabrication, the electrical conductivity will decrease obviously in diluted PEDOT:PSS solution. Herein, potassium thiocyanate (KSCN) is selected to regulate the properties of PEDOT:PSS HTLs from the diluted PEDOT:PSS aqueous solution by water with a volume ratio of 1:1 to prepare efficient TPSCs. The effect of KSCN addition on the structure and photoelectrical properties of PEDOT:PSS HTLs and TPSCs have been systematically studied. At the optimal KSCN concentration, the TPSCs based on KSCN-doped PEDOT:PSS HTLs (KSCN-PSCs) demonstrate the champion power conversion efficiency (PCE) of 8.39%, while the reference TPSCs only show a champioan PCE of 6.70%. The further analysis demonstrates that the KSCN additive increases the electrical conductivity of HTLs prepared by the diluted PEDOT:PSS solution, improves the microstructure of perovskite film, and inhibits carrier recombination in TPSCs, leading to the reduced hysteresis effect and enhanced PCE in KSCN-PSCs. This work gives a low-cost and practical strategy to develop a high-quality PEDOT:PSS HTLs from diluted PE-DOT:PSS aqueous solution for efficient TPSCs.
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BioEnergy Research
·
2023
·
IF 3.6
Xie Wenlei,Wang Quan,Guo Lihong,Zhang Qiaofei
The efficient conversion of low-grade acidic oils to biodiesel is still a great challenge due primarily to the presented free fatty acids (FFAs) and moisture that significantly activate the used catalysts . In this premise, the acidic aluminosilicates (AAS) were employed as catalyst supports for loading of molybdenum and zirconium metals to synthesize the solid acid catalysts of molybdenum and zirconium doped aluminosilicates (ZrMo-AAS). The so-synthesized composite catalysts were characterized by various physicochemical techniques, and their catalytic activities were evaluated for the efficient biodiesel production by using acidic soybean oils as feedstocks. Results revealed that the targeted solid catalysts featured dual Bronsted-Lewis acidic sites and mesoporous structure with the acidity of 719 μmol/g and surface area of 459.7 m 2 /g, displaying high catalytic performances for the concurrent transesterification of triglycerides and esterification of FFAs with 92.3% of oil conversion and full FFA conversion to biodiesel at a reaction temperature of 130 °C for 12 h with a methanol/oil molar ratio of 30. This solid catalyst had good water and FFA-resistance capacity even with water content to 1% and FFA content of 40%, and moreover could be easily recovered by filtration with a steady reusability with a slight attenuation in the activity after five time reuses, rendering it to have the potential of cost-effective production of biodiesel from the low-grade oils.
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CHINESE JOURNAL OF POLYMER SCIENCE
·
2023
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IF 4.3
Shen Zhi-Wei,Hu Shu-Feng,Zeng Chen,Kong Wei-Qing,Zhu Mei-Fang
With the global ban on plastics intensifying, the substitution of plastic with paper has garnered increasing attention. However, the inadequate water and oil repellency of pulp molding hinders its practical applications. Currently, the common method to enhance the oil and water repellency of pulp molding is by adding fluorinated water and oil repellents. Nevertheless, fluorinated compounds are environmentally and physiologically harmful. Therefore, the development of fluorine-free, water and oil repellent alternatives is crucial. In this study, chitosan and stearic acid were utilized as the first and second layers of the oil and water repellent coatings, respectively. The coated samples exhibited favorable water repellency, with a water contact angle of 116.4°, and excellent oil repellency, achieving a 12/12 rating on the kit scale. Importantly, the samples did not exhibit any leakage after being soaked in hot water and hot oil at 95±5 °C for 30 min, demonstrating remarkable performance as a barrier against hot water and oil. Moreover, the coated samples displayed outstanding mechanical properties, thermal stability, biodegradability, and recyclability. The approach presented in this study is simple, cost-effective, environmentally friendly, and represents a promising technique for producing fluoride-free, oil- and water-resistant pulp molding products.
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Nano Research
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2023
·
IF 9.9
Sun Yaru,Yu Bin,Liu Yan,Yan Junbo,Xu Zixi,Cheng Bo,Huang Fenglei,Wang Jun
High-performance flame-retardant polylactic acid (PLA) bio-composites based on biobased fillers to meet usage requirements represents a promising direction for creating a sustainable world. Although flame retardant PLA composites have been reported extensively, it still remains a huge challenge to develop mechanically robust. The flame retardant PLA composites due to plastication effect of organic flame retardants and poor compatibility of organic fillers with the matrix lead to the severe deterioration in mechanical properties. In this work, a bio-inspired surface manipulation strategy for halloysite nanotubes (HNTs) was proposed via a facile and green self-assembly process. The structure and morphology of bio-inspired HNTs (b-HNTs) proved that biomass nanofillers (PA-NA-Fe) grew well both within the lumen and on the surface of HNTs. The growth of biomass on the inner and outer surfaces of HNTs was inspired from wooden towards enhancing the interface compatibility and imparting multi-properties to PLA biopolymer. Excellent mechanical properties (tensile, thermomechanical and anti-impact mechanical), great fire safety (heat release and smoke emission), thermostability and improved electromagnetic interference shielding effectiveness of this well-designed PLA nanocomposite were realized. The mechanisms of the enhanced performances of the PLA bio-composites by loading b-HNTs were proposed. This work presents a facile and environmentally-friendly bio-inspired modification strategy for HNTs to fabricate high-performance, multi-functional polymer composites, which is also suitable for surface modification of many other nanomaterials, including nanofibers, nanotubes, nanowires, and nanosheets.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2023
·Vol. 415
·期 25
·6145-6153
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IF 4.3
Xu Lixing,Du Xing,Liu Tianqing,Sun Dan
Ferroptosis is a non-apoptotic cell death regulated by iron-dependent lipid peroxidation. Glutathione (GSH), a key antioxidant against oxidative damage, is involved in one of the most important metabolic pathways of ferroptosis. Herein, an excellent plasmonic nanoprobe was developed for highly sensitive, in situ, dynamic real-time monitoring of intracellular GSH levels during ferroptosis. A nanoprobe was prepared by functionalizing gold nanoparticles (AuNPs) with the probe molecule crystal violet (CV). The fluctuation in the SERS signal intensity of CV via the competitive displacement reaction can be used to detect GSH. The advantages of the plasmonic nanoprobe including low-cost production techniques, outstanding stability and biocompatibility, high specificity and sensitivity towards GSH with a detection limit of 0.05 μM. It enables real-time dynamic monitoring of GSH levels in living cells during erastin-induced ferroptosis. This approach is expected to provide important theoretical support for elucidating the GSH-related ferroptosis metabolic mechanism and advancing our understanding of ferroptosis-based cancer therapy. Graphical abstract Overview of the workflow of sensing principle for highly sensitive, in situ and dynamic tracking of intracellular GSH levels during drug-triggered ferroptosis process.
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WATER AIR AND SOIL POLLUTION
·
2023
·Vol. 234
·期 7
·1-9
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IF 2.9
Shi Zhimeng,Liu Yuchen,Wang Xiaowen,Du Kehui,Tian Hongzhe
Five choline ionic liquids were selected to evaluate their toxicity to green alga ( Chlorella vulgaris ) and Daphnia magna . Their influence on chlorophyll content, respiration rate, antioxidase activity, and malondialdehyde content of Chlorella vulgaris and the acute and chronic toxicity of Daphnia magna were investigated. The studied ionic liquids slightly inhibited the algal growth with the median effective concentrations (EC 50 ) > 1900 mg/L. Chlorophyll contents, respiration rate, and protein contents of the alga after 96 h of exposure decreased with the higher concentrations of the ionic liquids, while superoxide dismutase and catalase activity and malondialdehyde content increased firstly and then decreased. The acute toxicity of Daphnia magna after 48 h of exposure (indicated by the median effective concentrations, EC 50 ) was 200.44 and 184.50 mg/L for choline acetate and choline D-lactate, respectively, which was above the toxicity of other ionic liquids. The studied ionic liquids presented low toxicity to Chlorella vulgaris and Daphnia magna .
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AQUACULTURE INTERNATIONAL
·
2023
·
IF 2.9
Liu Guoqing,Zhou Meng,Mao Xiangjie,Gu Dianchao,Chen Wangwang,Long Xianmei,Xie Shouqi,Tan Qingsong
The
objective of this study was to evaluate the nutritional value of Clostridium autoethanogenum protein (CAP) as a sole protein source at different dietary protein levels by growth performance, health status, and intestinal microbiota of grass carp. Grass carp (4.56 ± 0.01 g) were randomly divided into 6 treatments in triplicate (30 fish per replicate) and fed with gradient protein level (24.45%, 27.31%, 31.82%, 35.79%, 38.64%, and 42.82%, respectively; named CAP1, CAP2, CAP3, CAP4, CAP5, and CAP6) diets for 8 weeks. Final body weight (FBW) and specific growth rate (SGR) were the significantly highest in the CAP4 group ( P < 0.05). Based on SGR and feed efficiency (FE), the dietary protein requirement for juvenile grass carp was estimated to be 36.14–37.90%. CAP4 promoted hepatopancreatic health by reducing lipid deposition and structural lesions, and improved the anti-inflammatory ability by upregulating the relative expression level of il10 ( P < 0.05). At the same time, the CAP4 improved the length of mucosal fold and the thickness of muscular layer. In addition, CAP4 can maintain the composition and metabolic function of intestinal microbiota and enhance the endocrine system and bacterial chemotaxis. However, it is worth noting that increasing CAP inclusion depressed hepatopancreatic antioxidant capacity. In conclusion, CAP is a promising novel protein source for grass carp, while careful consideration of its side effect at high inclusion level is deserved.
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International Journal of Environmental Science and Technology
·
2023
·
IF 3.1
Yang X.,Mao L.,Shuai H.,Rong Q.,Zhang S.,Lu H.
Fuchsin acid (FA) and other organic dye contaminants have a great harm to the environment and organisms. It is of importance to develop suitable materials with simple preparation process, low cost and excellent performance, for the purification of polluted water. Layered double hydroxides (LDH), as a kind of efficient anion adsorption materials, can be reused simply, but with poor solid–liquid separation efficiency. Herein, the magnetized modified CaAl-LDH (designated as M-CaAl-LDH) was successfully prepared by using cheap compounds such as CaO, AlCl 3 and Fe 2+ /Fe 3+ under the ultrasound-assisted co-precipitation condition. The crystal structure, surface morphology, and elemental compositions were characterized by XRD, FTIR-ATR, SEM–EDS, for the as-prepared LDH materials. The optimized results of removal effect for FA in the simulated sewage show that the removal rate was reached 92.15%, when 0.5 g M-CaAl-LDH was added to the simulated solution with initial pH = 7.5 after adsorption time of 60 min. As for CaAl-LDH before and after magnetic loadings, it is also found that the elimination capacity of M-CaAl-LDH is slightly lower than CaAl-LDH, which may be resulted from the loading of minor amounts of magnetic nano-Fe 3 O 4 with poor removal ability. Graphical Abstract
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CATALYSIS LETTERS
·
2023
·
IF 2.8
Xia Hui,Zhang Zihan,Ding Ji,Jiang Kehan,Xue Feng
Gastrodin is an important plant-derived medicinal ingredient that has been used to treat various diseases. Biosynthesis is an effective strategy for gastrodin production, but the expression and activity of natural glycosyltransferases (GTs) is generally a limiting factor. To identify highly efficient GTs, four plant-derived enzymes were identified by homologous sequence analysis and expressed in Escherichia coli BL21 (DE3). A GT from Arabidopsis thaliana (At UGT) displayed the highest activity of 0.45 U/mg, with an optimal pH of 9.0 and high thermostability. Under optimized conditions, 10 mM p -hydroxybenzyl alcohol and uridine diphosphate glucose were converted into 2.67 g/L gastrodin, corresponding to a conversion rate of 94.34% in 12 h. Furthermore, molecular docking simulations were performed between At UGT and p -hydroxybenzyl alcohol, revealing the catalytic mechanism of At UGT. This study provides a novel and effective biocatalyst for the synthesis of gastrodin. Graphical Abstract
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 24
·1-18
·
IF 2.8
Li Qunbo,Yu Gaoqiang,Ye Mingquan,Han Aijun,Liu Qingzhong,Su Yaojing,Chen Cheng
Transition metal dichalcogenides (TMDCs) are considered to have remarkable electromagnetic (EM) wave attenuation due to their perfect dielectric property and graphene-like structure, but they still often fail to function due to impedance mismatch problems. Here, using a multilayer coating strategy, we prepared flower-like Fe 3 O 4 @SiO 2 @MoSe 2 absorbers with core–shell structure. SiO 2 can form the Fe 3 O 4 -SiO 2 and SiO 2 -MoSe 2 heterogeneous interfaces when it is applied to the Fe 3 O 4 surface as an impedance matching layer in the Fe 3 O 4 @SiO 2 @MoSe 2 composite, increasing the interfacial polarization loss to the absorber. In addition, Fe 3 O 4 @SiO 2 as a magnetic core also reduces the relative density of the substance compared to Fe 3 O 4 . Products with the absorption performance of various electromagnetic waves were produced by varying the amount of magnetic components (Fe 3 O 4 @SiO 2 ) in the absorber. With a minimal reflect loss (RL) of − 51.86 dB and an effective absorption bandwidth (EAB, RL < -10 dB) of 4.96 GHz at a matching thickness of 1.8 mm, the Fe 3 O 4 @SiO 2 @MoSe 2 (sample S3) demonstrated exceptional properties in EM wave absorption. In addition, we synthesized Fe 3 O 4 @MoSe 2 and determined its RL value and maximum EAB (EAB max ) in order to highlight the significance of the impedance matching layer SiO 2 . Fe 3 O 4 @MoSe 2 appears to perform less well than Fe 3 O4@SiO 2 @MoSe 2 in terms of EM wave absorption, with a minimal RL value of -50.20 dB and an EAB max of only 2.00 GHz at the matching thickness of 4.8 mm. The remarkable properties in EM wave absorption of Fe 3 O 4 @SiO 2 @MoSe 2 is the result of the combined effect from impedance match and loss mechanisms of various compositions, so the component SiO 2 has a non-negligible function as an impedance matching layer. This study has blazed the trail for developing the lightweight and excellent performance of absorbers.
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JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 32
·13080-13099
·
IF 4.5
Zhang Ruizhi,Li Jiajin,Ding Jijun,Wei Qinqin,Luo Guoqiang,Wang Baozhen,Sun Yi,Zhang Jian,Shen Qiang
The dynamic response experiment has been a difficult point of the metal/polymer interfacial bonding performance testing, in which the metal surface state and the loading condition are key independent variables that should be comprehensively investigated. This work investigates the effect of loading velocity and Al surface porosity on Al/PMMA interfacial dynamic shear bonding performance. Firstly, simulation is applied to predict dynamic response variation trends. Simulation results show that the maximum force (MF) has minor changes with initial bullet velocity (IBV), while the de-bonding displacement (DD) and interface failure work (IFW) decrease obviously with IBV. All three indicators increase smoothly with the area ratio of PMMA interlocks. In experiment, the result plots of the indicators are all discrete, but as a whole, the MF plots could not be distinguished by the variation of IBV, while the plots of DD and NW decrease with IBV, which are consistent with simulation. The dynamic response indicators obtained by simulation and experiment show similar variation trends with their respective independent variables at certain ranges (surface porosity: − 15–20%/dm 2 , area ratio: 0–0.33) and could be contrasted to evaluate the indicator value differences at full range. By further analysis within MF and DD indicators, the stability of the dynamic interfacial stiffness is discovered at their respective loading velocities, which is similar static loading in past work. The strengthening and weakening mechanisms of Al/PMMA interface are also inferred. This experiment–simulation combined work exhibits a systematic method to predict the dynamic response with the variation of the independent investigating variables at certain ranges, to evaluate the degree of deviation of the experimental plots from simulative ones and to help determine the porosity range where higher dynamic response would be obtained, which would be also applied to other metal/polymer layered system. Graphical abstract
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危险品化学品经营许可证（带存储）