SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Kong-Lei Zhu,Ying-Jiao Li,Qiang Ma,Hai-Kui Zou,Guang-Wen Chu,Bao-Chang Sun
Removal of catalyst particles from the fluid catalytic cracking (FCC) slurry oil is of crucial significance for its efficient utilization. In this work, the removal of catalyst particles from FCC slurry oil was performed in a stirring tank reactor (STR) and the optimal operating conditions in STR were obtained. Under the optimal operating conditions (900 rpm, 30 min, 95 °C, 24 h, 500 μg/g settling agent), the ash content in the FCC slurry oil treated by the chemical settling can be reduced from 5620 μg/g to 320 μg/g. These results showed that stirring speed, dosage of the settling agent, and mixing time are important to improve the removal efficiency of catalyst particles. Moreover, a rotating packed bed (RPB), as an intensified micromixing device, was employed to intensify the removal of catalyst particles from FCC slurry oil. The ash content in the FCC slurry oil treated by the chemical settling can be reduced from 5620 μg/g to 270 μg/g in RPB under the optimal operating conditions. The removal efficiency of the ash in RPB was increased by 15.6 % with respect to those obtained in STR. This work could provide relevant guidelines to rationally design efficient route for the removal of catalyst particles from FCC slurry oil.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 47
·16623-16630
·
IF 6.4
Zhicheng Li,Yu Zhang,Zhongbin Pan,Xu Fan,Hao Wang,Peng Li,Haiming Huang,Weiliang Wang,Jinjun Liu,Jiwei Zhai
Flexible dielectric and electronic materials are widely employed in emerging fields. Dielectric energy storage technologies and materials are needed to simultaneously cope with stringent requirements, such as high-stability and compact-size energy storage. Nonetheless, many mainstream polymer dielectrics prematurely fail under the coupling of rising electric field strength and space charge accumulation. Herein, we constructed a one-dimensional core–shell heterogeneous filler (BiFeO3@Al2O3) and added it to wide HOMO–LUMO gap cyanoethyl cellulose, achieving ultrahigh breakdown strength (∼801 MV m−1) and dielectric constant (∼17.3), thus obtaining a substantial discharged energy density of ∼31.3 J cm−3, accompanied by stabilized cyclic charge/discharge of 105. The superior energy storage performance is ascribed to the shell (Al2O3) having a higher work function, forming built-in electric fields with core (BiFeO3), simultaneously decreasing the density of state and increasing the bandgap of nanofibers. This research provides an optimization technique for crafting advanced polymer dielectrics, catering to the evolving demands of modern energy storage applications.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·
IF 2.5
Nie Liu,Zhang Donghuai,Hu Jie,Sun Jian,Lai Changgan,Guo Zhiliang,Wang Helin,Ji Shuai,Lei Lixu
Lead formate (LF) has been successfully prepared from compounds in spent lead-acid batteries by a simple and low-cost method. The irregular sheets of LF pile up to form agglomerated particles. When it is used as an additive in the negative electrode, it makes the electrode perform better and be able to discharge a capacity of 107 mAh g −1 at 100 mA g −1 to 1.75 V; it still discharges 86.5 mAh g −1 after 1200 cycles. EIS shows that the electrode has lower resistance and higher ion diffusion rates than the one without LF. The reason could be that LF produces formic acid when it meets sulfuric acid, and the formic acid could clear up the oxide on lead alloy grid as well as basic lead sulfate in the electrode, thus making the conduction network grow better.
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2023
·Vol. 13
·期 1
·1-14
·
IF 4.6
Du Fu,Liu Liping,Pan Yong,Wu Chuang,Wang Ronghao,Zhao Zeyu,Fan Wenpeng,Song Hao,Shi Youzhi,Wang Jian
A novel composite hydrogel (AM/CMC/B) synthesized from peanut shell biochar effectively adsorbs heavy metal Cd in water and reduces its toxicity to tobacco seedlings. The hydrogel, prepared via hydrothermal polymerization using acrylamide (AM), carboxymethyl cellulose (CMC), and peanut shell biochar (B), exhibited a maximum adsorption capacity of 164.83 mg g −1 for Cd 2+ and followed a pseudo-second-order kinetic model. In pot experiments, the application of exogenous AM/CMC/B mitigated the inhibitory effects of Cd-contaminated soil on tobacco seedling growth. Addition of 10 mg kg −1 Cd resulted in improved phenotype, root system development, enhanced photosynthetic capacity, stomatal conductance (Gs), stomatal number, and increased antioxidant activity while reducing MDA content and leaf cell death. These findings highlight the potential of AM/CMC/B as an environmentally friendly adsorbent for Cd removal from water and for reducing Cd stress toxicity in tobacco and other plants.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LAB ON A CHIP
·
2023
·Vol. 23
·期 20
·4493-4503
·
IF 6.1
Wei Liu,Yongan Feng,Yapeng Yao,Zihang Liang,Fei Xiao,Zhongliang Ma
Integrating energetic materials with microelectromechanical systems (MEMS) to achieve miniaturized integrated smart energetic microchips has broad application prospects in miniaturized aerospace systems and civil explosive systems. In this work, MEMS compatible [Cu(BODN)·5H2O]n arrays and [Cu(BODN)·5H2O]n@nano-Al composite energetic films were successfully fabricated on copper substrates by the in situ reaction method and drop-coating method. Single crystal X-ray diffraction, powder X-ray diffraction, scanning electron microscopy, infrared spectroscopy, differential thermal analyses, and pulsed laser ignition were employed to characterize the prepared samples. The results show that [Cu(BODN)·5H2O]n arrays formed by the coordination reaction between the Cu(OH)2 template and the BODN ligand exhibit a porous supramolecular structure with excellent thermal and energy properties. Their morphology and composition on a copper substrate can be effectively regulated by adjusting the reaction time and solution concentration. In addition, adjustable energetic properties of [Cu(BODN)·5H2O]n@nano-Al composite films can be achieved after the encapsulation of nano-Al. Their heat release, flame height and ignition duration can reach as much as 1987.5 J g−1, 13.2 mm, and 5900 μs, respectively, indicating that [Cu(BODN)·5H2O]n@nano-Al can be used as an excellent pyrotechnic agent in MEMS ignition chips. Overall, this work provides a reference for the integration and application of energetic materials in MEMS systems.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Wei Chen,Fucheng Yun,Shenyi Zheng,Chen Shi,Jian Han
In this study, a simple two-step preparation method was used to prepare a new type of composite fiber adsorbent, metal–organic framework/chitosan/hydroxyapatite (ZIF-8 @CS/HAP), for the efficient removal of Lead ions（Pb(Ⅱ)）from water. The composite fiber was first characterized, and its surface morphology , functional groups, crystallinity, and pore structure were investigated. Subsequently, its optimal use environment was studied, and results found that the adsorbent could achieve the best effect in Pb(Ⅱ) solution with a starting concentration of 200 mg/L at pH ≥ 6 and a temperature of around 298 K. The presence of coexisting ions (Co 2+ , Sr 2+ , Ni 2+ , Cd 2+ , and Cu 2+ ) had no significant effect on the selective removal of Pb(Ⅱ) by ZIF-8 @CS/HAP. The process of ZIF-8 @CS/HAP adsorbing Pb(II) corresponded to the Langmuir model and the pseudo-second-order kinetic model, according to isotherm and kinetic investigations. The adsorption data fitted with the Langmuir model at 298 K reached a fitting degree (R 2 ) of 0.996, and the largest adsorption capacity up to 1058.2 mg/g, which is better than that in most fiber adsorbents. The adsorption mechanism could be attributed to the complexation of hydroxyl and amino groups on the surface of the composite fiber with Pb(Ⅱ), the coprecipitation of phosphate groups with Pb(Ⅱ), ion exchange, and electrostatic adsorption. This study provides an efficient adsorbent for treating Pb(Ⅱ)-contaminated wastewater. Its preparation process is environmental-friendly and easy to use, and it has a high adsorption capacity. Therefore, it has a wide array of potential applications in the field of water treatment.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2018
·
IF 3.909
Guijie Chen,Mingjia Wang,Minhao Xie,Peng Wan,Dan Chen,Bing Hu,Hong Ye,Xiaoxiong Zeng,Zhonghua Liu
Fuzhuan brick tea (FBT) possesses various health-promoting functions. However, the available information regarding biological activity of polysaccharides from FBT (FBTPS) is still limited. In this work, the chemical property, cytotoxicity and antioxidant activity in vitro and in vivo of FBTPS were evaluated. It was found that FBTPSs were typical acidic heteropolysaccharides mainly composed of Man, Rha, GalA, Glc, Gal and Ara with little molar content of Rib and GlcA. FBTPS showed little toxicity to human hepatic epithelial (L-02) cell. FBTPS exhibited antioxidant activities, including limited scavenging activity on DPPH free radicals (ranged from 54.3 ± 1.9 to 67.8 ± 2.5%), noticeable scavenging activity on superoxide radicals (over 85%), superior scavenging activity on ABTS radicals (near 100%), and protective effect on H 2 O 2 -induced oxidative injury in rat pheochromocytoma line 12 (PC12) cell. Moreover, FBTPS showed significant amelioration of high-fat diet-induced oxidative injury in mice. The results suggest that FBTPS, as natural safe antioxidants, may have potential application in functional foods.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Drug Delivery and Translational Research
·
2023
·
IF 5.4
Yu Linrong,Zhang Qiliang,Zhou Liping,Wei Yanjun,Li Mengshuang,Wu Xianggen,Xin Meng
Alpha-glucosyl hesperidin (GH) is an aqueous soluble, amphipathic hesperidin derivative with several pharmacological effects, and it is postulated in this manuscript that GH could potentially be utilized as an active pharmaceutical excipient in eyedrops. The ocular safety of GH was evaluated according to in vitro cytotoxicity and in vivo ocular tolerance. The in vivo corneal permeation of coumarin-6 (Cou-6) with or without GH was characterized, and the in vivo inducing corneal wound healing using bisdemethoxycurcumin (BDMC) with or without GH was also evaluated to determine whether GH is an active pharmaceutical excipient in eyedrops. The results demonstrated that as high as 30 mg/ml of GH exhibits high-level in vitro and in vivo safety profiles according to four in vitro and in vivo evaluations. GH improved the corneal permeation of Cou-6 in mice, as well as demonstrated in vitro antioxidant activity. Concerning in vivo activity, a BDMC–GH suspension was shown to be synergistic in promoting corneal wound healing in mice, as well as restoring corneal sensitivity, promoting corneal epithelial wound healing, and restoring the corneal tissue structure without inflammatory cell infiltration. Overall, GH could be a novel and promising active excipient in eyedrops. Graphical Abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2023
·
IF 4.1
Xin Zheng,Zhifeng Duan,Yan Zhuang,Shifeng Zhang,Xinying Cui,Donghui Qin
During oil and gas well construction, lost circulation caused substantial nonoperation time and extra costs, and hydrogel, resilient and environmentally friendly, was one of the major types of material for lost circulation treatment. To migrate the weak bonding and hydrothermal degradation of conventional single network hydrogels, dual network (DN) hydrogel was prepared and immersed in solvents of polyethylene glycol (PEG), ethylene glycol, and glycerol. The swelling of DN gels at different temperatures was studied with water content and swelling rate tests, and the gel structural and morphology was characterized with attenuated total reflectance infrared spectroscopy (ATR-IR) and scanning electron microscopy test. Then, the compression test and fracture plugging performance test were conducted to study the strength of the gel. The results show that compared to those in ethylene glycol and glycerin, DN gel after immersion in PEG (DN-PEG) exhibits greater compression strength and better plugging performance even at high temperatures. The compression strength of DN-PEG was twice that of DN hydrogel before immersion, and its fracture plug breaking pressure can reach over 10.0 MPa. After undergoing hydrothermal treatment at 90 °C, the compression strength of the DN-PEG was nearly 20 times that of the DN hydrogel, and the fracture plug breaking pressure was still 2.81 MPa. According to ATR-IR spectroscopy, as the molecular weight of the solvent increases, more hydroxyl groups in the PEG have better ability to bind with hydrogen bonds, which greatly inhibits the swelling and polymer chain breakage, thereby reducing hydrothermal degradation in the strength of the dual-network hydrogel. Our work proposed an effective method to reduce the degradation of hydrogel in water at high temperature, and the prepared DN-PEG hydrogel was a promising material for lost circulation treatments in fractured formation.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Yifan Jiang,Fengqi Zhao,Zhao Qin,Ming Zhang,Na Li,Zhoufeng Jiang
The oxygen vacancy defect engineering has been identified as a valid strategy to modify the physicochemical and catalytic properties of semiconductor catalysts, but it’s rarely used in combustion catalyst. Herein, a novel oxygen deficient copper oxide (CuO 1−x ) nano-combustion catalyst was successfully prepared by a two-step process involving the controlled chemical precipitation and vacuum sintering. As expected, the CuO 1−x exhibits enhanced catalytic activity towards the ammonium perchlorate (AP) thermal decomposition. Once CuO 1−x nanocatalyst was added, the high-temperature decomposition peak temperature (T HTD ) and the apparent activation energy (Ea) of AP are respectively decreased by 109.2 °C and 79.2 kJ/mol, higher than those of commercial nano-CuO (80.6 °C and 56.4 kJ/mol), showing significant oxygen vacancy defect effects. In addition, the effect of oxygen vacancy defects in CuO 1−x on the catalytic thermal decomposition behaviors and mechanism of AP were investigated by thermal analysis techniques and density functional theory for the first time. The results prove that the improved catalytic performance of CuO 1−x towards the thermal decomposition of AP might relate to the enhanced adsorption and bonding capacity with NH 3 , which helps to prevent the accumulation of NH 3 and consequently promote the thermal decomposition reaction of AP.
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Xuan Rui,Huabo Gong,Haiping Yuan,Nanwen Zhu
Leachate from Municipal Solid Waste (MSW) incineration plants contains multiple antibiotics. However, current knowledge of antibiotics in such leachate is very limited compared to landfill leachate . In this study, the distribution, removal and ecological risks of 8 sulfonamides (SAs), 4 quinolones (FQs), and 4 macrolides (MLs) antibiotics in leachate from three MSW incineration plants in Shanghai were investigated. The results showed that 12 types of target antibiotics were detected at high concentrations (7737.3–13,758.7 ng/L) in the fresh leachate, exceeding the concentrations reported for landfill leachate. FQs were the dominant antibiotics detected in all three fresh leachates, accounting for >60 % of the total detected concentrations. The typical “anaerobic-anoxic/aerobic-anoxic/aerobic-ultrafiltration” treatment process removed the target antibiotics effectively (89.0 %–93.4 %), of which the anaerobic unit and the primary anoxic/aerobic unit were the most important antibiotic removal units. Biodegradation was considered to be the dominant removal mechanism, removing 78.11 %–92.37 % of antibiotics, whereas sludge adsorption only removed 1.02 %–10.89 %. Antibiotic removal was significantly correlated with leachate COD , pH, TN, and NH 3 -N, indicating that they may be influential factors for antibiotic removal. Ecological risk assessment revealed that ofloxacin (OFX) and enrofloxacin (EFX) in the treated leachate still posed high risks to algae and crustaceans. This research provides insights into the fate of antibiotics in leachate.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 17
·5098-5110
·
IF 7
Yangwen Hou,Man Dong,Jingting He,Jing Sun,Chunyi Sun,Xiao Li,Xinlong Wang,Zhongmin Su
All-inorganic perovskite (CsPbBr3) nanocrystals (NCs) are exceptional candidates for photocatalysis due to their optimal band structure, high molar extinction coefficient, and long charge-carrier diffusion lengths. However, their inevitable instability and low charge transfer efficiency have prevented their widespread applications. A strategy that can improve both stability and charge separation efficiency is desperately required. Herein, by introducing an in situ structural transformation strategy, hydrophobic hierarchically porous CsPbBr3@Pb-MOF is obtained which exhibits high durability in water for more than 7 weeks and appealing thermal stability and resistance to anion intrusion. Meanwhile, abundant oxygen vacancies are detected which efficiently suppress the photogenerated charge recombination. As a result, impressive CO2 photoreduction activity is achieved with CsPbBr3@Pb-MOF as a catalyst. Through a gas–solid reaction (without sacrificial agents and photosensitizers), this CsPbBr3@Pb-MOF-2 composite exhibits a CO yield of 107 μmol g−1 h−1 with 99.2% selectivity under visible-light (λ > 420 nm) irradiation, surpassing most reported CsPbX3-based photocatalysts under similar conditions.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）