JOURNAL OF POWER SOURCES
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2022
·
IF 9.794
Yan Lei,Ruijuan Qi,Jinpeng Wu,Haodan Guo,Xiangrong Li,Yanyan Fang,Dongmei Xie,Yuan Lin
The III-V group colloidal quantum dots (CQDs) have been successfully synthesized with stable and low-cost chemical reagents recently, but they are rarely used for solid state solar cells due to the poor charge carrier transfer in solid films. In this work, the surface of InZnP (Zn doped InP) CQDs has been reconstructed with PbS via a chemical engineering strategy. Comparing with InZnP CQDs, the long carbon chain ligands capped on the InZnP@PbS CQDs surface can be easily exchanged with small molecules. By capping the mercaptopropionic acid (MPA) onto the InZnP@PbS CQDs surface, the electrical coupling between the InZnP@PbS CQDs has been established, and the photoinduced charge carrier transfer has been significantly enhanced. Based on the above CQDs, solid state solar cell devices are assembled, achieving about 1.5% of power conversion efficiency (PCE). The photoelectric performances of the fabricated solar cells almost do not decay after 150 days storage. Current work may provide a new way for III-V group CQDs application in solution-processed optoelectronics .
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Arabian Journal of Chemistry
·
2022
·
IF 6.212
Jinjian Hou,Mingyao Cao,Keyi Duan,Lingyu Sun,Shuanglong Lin,Ming Zhang,Wei Li
In this study, we used the Span 80 to enhance solvent extraction process, and we explored the mechanism. The results indicated different solvents would obtain different oil recovery, and toluene showed the optimal oil recovery, and the n-heptane showed the lowest oil recovery. The complex solvents could improve oil recovery. Toluene could make the heavy oil show the lowest viscosity (89.6 Pa.S), and n-heptane make the heavy oil show the highest viscosity (176.3 Pa.S). Complex solvents could decrease the heavy oil viscosities. The higher C/H was, the higher heavy oil recovery was, and when the asphaltene and resins content increase, the C/H would increase. The C/H showed the highest value (9.09, by toluene) and the lowest value (8.15). In this study, Span 80 could increase heavy oil C/H ratio, decrease heavy oil viscosity. Span 80 could make the sands surface more hydrophilic, and then the solvent loss would decrease. The oil recovery was high after 10 times recycle use.
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Catalysis Science & Technology
·
2022
·Vol. 12
·期 15
·4837-4850
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IF 6.177
Haoyi Lin,Jiaxing Zhang,Qingxu Duan,Kaixuan Yang,Weiping Liao,Shixue Qi,Hongying Lü,Zhiguo Zhu
Plentiful heteroatom-containing zeolites as versatile redox catalysts have been successfully post-synthesized via the top-down methodology, where the starting aluminosilicate zeolites are normally expected to be highly dealuminated to maximize the amounts of silanol nests and occasionally to evade the detrimental effect of framework Al ions on the catalytic performance. Herein, our proposed dealumination-controlled strategy for the synthesis of hierarchical Ti–Y zeolite breaks through this concept. Framework-substituted Ti and tri-coordinated Al species were afforded from the interaction of Ti ions with dealumination-derived silanol nests and from the process of acid treatment, respectively. Structure–function relationships revealed that Lewis acid sites were the catalytically active centres of Ti–Y zeolite in oxidative desulfurization with hydrogen peroxide as the oxidant, which came from the cooperative effect of dual active sites containing framework-substituted Ti and tri-coordinated Al species. The amounts of Lewis acid sites demonstrated a volcanic-type trend as the acid-treatment time increases. The reusability, regeneration ability, deactivation mechanism were also systematically investigated in oxidative desulfurization. Thus the Ti–Y zeolite catalyst was also effective for Baeyer–Villiger oxidation of 2-adamantanone. This work discloses the effectiveness of preparing an efficient Ti–Y zeolite catalyst with cooperative dual active sites via a dealumination-controlled strategy, which bears potential application for constructing other heteroatom-containing FAU-type zeolites with Lewis acid property.
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JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2022
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IF 6.437
Shiyun Tang,Qiuyuan Xu,Kexin Liu,Junjiang Guo,Anjiang Tang
Coking with carbon deposition in hydrocarbon fuel (C x H y ) pyrolysis at high temperature is a serious problem to be considered. In this work, single component C x H y with different structures was used as the probe of the carbon deposition. Thirteen simple and representative of alkanes, cycloalkanes , aromatics and O-containing C x H y were selected as the model compounds to decompose and coking in microchannel continuous flow reactor under the same conditions. The distributions of gas, liquid and solid phase products formed by C x H y pyrolysis were characterized by GC, GC-MS, SEM and TPO-IR respectively. The results demonstrate that the molecular structure of C x H y has a great influence on pyrolysis and coking behavior. For all alkanes, CH 4 , C 2 H 4 , C 3 H 6 and C 4 H 8 are the most abundant in gaseous products, and their total content exceeds 70 %. For cycloalkanes, monocyclic cyclohexane pyrolysis tends to produce C 2 H 4 , C 4 H 8 and 1,3-C 4 H 6 , while bicyclic decahydronaphthalene pyrolysis tends to produce CH 4 , C 2 H 4 and C 3 H 6 . For aromatics, CH 4 and C 2 H 4 are the main products in the pyrolysis gas phase of benzene, toluene and ethylbenzene . Interestingly, in the liquid phase of the pyrolysis of O-containing C x H y (ethanol, acetone and tetrahydrofuran), most of the products are oxygenated compounds and no aromatics. SEM and TPO-IR revealed that at least three carbon species were formed by cracking of C x H y molecules with different structures, including amorphous, filamentous and granular carbon. However, due to the great and complex influence of C x H y molecular structure on the micro morphology of carbon deposition, it is difficult to classify all carbon species at present, which needs further experiments and researches.
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ADVANCED MATERIALS
·
2022
·Vol. 34
·期 37
·2204259
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IF 32.086
Jingxuan Chen,Donglin Jia,Rongshan Zhuang,Yong Hua,Xiaoliang Zhang
Perovskite quantum dots (PQDs) have emerged as competitive optoelectronic materials for photovoltaic applications due to their ideal bandgap energy, high defect tolerance, and solution processability. However, the highly dynamic surface and imperfect cubic structure of PQDs generally result in unfavorable charge-carrier transport within the PQD solids and serious nonradiative recombination. Herein, a highly orientated PQD solid is demonstrated using precursor engineering accompanied by a chemical stripping treatment (CST). A combination of systematic experimental studies and theoretical calculations is conducted to fundamentally understand the resurfacing of PQDs using the CST approach. The results reveal that the highly ordered PQDs can result in a high orientation of PQD solids, significantly promoting charge-carrier transport within the PQD solids. Meanwhile, the ideal cubic-structured PQD with an iodine-rich surface dramatically decreases surface trap states, thereby substantially diminishing trap-assisted nonradiative recombination. Consequently, the inorganic PQD solar cell delivers a power conversion efficiency of up to 16.25%. This work provides a feasible avenue to construct highly orientated PQD solids with improved photophysical properties for high-performance optoelectronic devices.
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PubMed
高影响因子
Insects
·
2022
·Vol. 13
·期 8
·703
·
IF 3.139
Zhe Liu,Wenbin Chen,Shuai Zhang,Han Chen,Honghua Su,Tianxing Jing,Yizhong Yang
Simple SummaryBemisia tabaciGennadius (Hemiptera: Aleyrodidae) was first observed in tobacco in Greece in 1889. In China, since the introduction ofEuphorbia pulcherrima(Euphorbiales: Euphorbiaceae, native to Central America) at the end of the previous century,B. tabacihas gradually become an increasingly significant agricultural pest. In recent years, the push–pull strategy has been widely applied to the control of the pest. The distinct volatiles are emitted of plants directly affect the efficiency of pushing and pulling; hence, we aimed to study the behavioral responses ofB. tabacito three plants (Gossypium hirsutum, Abutilon theophrasti, andRicinus communis) during various growth phases (pre-flowering, fluorescence, and fruiting) and analyzed the quality and quantity of volatiles from of three growth stage, as well as identified few compounds that attract or repel theB. tabaci. The results demonstrated that the distinct volatiles are emitted by pre-flowering, flowering, and fruiting plants with varying effects onB. tabacipreference. Three volatile compounds (linalool, (Z)-3-hexenyl acetate, and nonanal) analyzed in this study had trapping/repellent effects onB. tabaci.Therefore, these compounds can be adopted as potential attractants or repellents to controlB. tabaci.AbstractBemisia tabaciGennadius (Hemiptera: Aleyrodidae) is a worldwide pest that damages over 900 host plant species. The volatile organic compounds (volatiles) of contrasting plants, as well as their growth stage, influence this pest’s infestation behavior. The chemical contents of volatiles isolated from three plants (Gossypium hirsutum,Abutilon theophrasti, andRicinus communis) during various growth phases (pre-flowering, fluorescence, and fruiting) were examined, as well as their influence on the behavior of adultB. tabaci. The olfactometer studies demonstrated that growth periods of the three plants affected the preference ofB. tabaci. Volatiles of piemarker and cotton plants had dissimilar levels of attraction to adults during all stages. Volatile substances released by the castor at the stage of flowering had repellent effect onB. tabaci. In the plant versus plant combination, piemarker volatiles before and during anthesis were most preferred by adults, followed by cotton and then castor. A total of 24, 24, and 20 compounds were detected from volatiles of piemarker, cotton, and castor, respectively, and proportions among the compounds changed during different stages of plant development. The olfactory responses ofB. tabacito volatile compounds presented that linalool and high concentration of (Z)-3-hexenyl acetate had a strong trapping effect on this pest, while nonanal had a significant repellent effect at high concentration. This study indicates that distinct plants and their growth stage affect their attractiveness or repellency toB.tabaciadults, which are mediated by changing plant volatiles. These compounds obtained by analysis screening can be adopted as potential attractants or repellents to control Mediterranean (MED)B. tabaci.Keywords:tobacco whitefly;Mediterranean (MED) cryptic species;selectivity;plant growth stage;volatile compounds;push–pull strategy
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Hongsen Niu,Yuke Chen,Eun-Seong Kim,Weijia Zhou,Yang Li,Nam-Young Kim
The development of capacitive tactile sensors with both ultrasensitivity and ultrafast response/relaxation is crucial for the development of intelligent healthcare monitoring technology. Despite the significant improvement in the sensing performance presented by the introduction of microstructures into the dielectric or electrode layers, meeting the demands of intellectualization remains a major challenge. Herein, a strategy to simultaneously introduce microstructures in both the dielectric and electrode layers is developed. The hierarchical sea-urchin TiO 2 particle-in-micropore (HSP-MP) structure in the dielectric layer induces stress concentration near the micropore regions, significantly enhancing the sensitivity and toughness of the device. The sparsely spaced large microcone improves the sensitivity of the hierarchical microcone (HM) structure in the electrode layer, while the small microcone reduces the hysteresis caused by interfacial adhesion. With the synergistic effect of the HSP-MP&HM structure, the proposed tactile sensor achieves ultrasensitivity of 10.5 kPa −1 , ultrafast response/relaxation time of 5.6/5.6 ms, and ultralow limit of detection of 0.1 Pa. These sensing properties are demonstrated in practical applications, including tiny signal perception of the human fingertip pulse, tiny muscle motion perception for Morse code transmission, and high-resolution flexible perception array with pressure mapping capability.
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Separation Science Plus
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2022
·Vol. 5
·期 9
·513-519
·
IF 0
Yanni Huang,Jia Chen,Gafang Fu,Chi Zhang,Hongdeng Qiu
This work reported the preparation and evaluation of a 2D porous graphene as the stationary phase for gas chromatography with high-resolution performance from non-polar to polar structural isomers. As a result, the dynamically coated porous graphene capillary column has a film thickness of about 16 μm. After aging treatment at different temperatures, the porous graphene capillary column exhibited high thermal stability up to 300°C. In addition, the porous graphene capillary column has good column repeatability and reproducibility. The retention time RSDs are 2.61–3.90% ( n = 3) during the days and 4.58–4.78% ( n = 3) column-to-column. This work demonstrates the advantageous separation performance of a good potential for the porous graphene as a new stationary phase for gas chromatography analysis.
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ACS Applied Nano Materials
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2022
·
IF 6.14
Keda Jiang,Feiran Li,Xuezeng Zhao,Yunlu Pan
Solid materials ubiquitously suffer from oil fouling in engineering applications. In this work, a facile and economical method was proposed to prepare a substrate-independent self-cleaning coating with remarkable oil repellency, which were realized by dints of the surface of nanocomposite structures with polar groups introduced by silica nanoparticles and polydopamine. The dip coating preparation process can be carried out in an ambient atmosphere without the use of hazardous reagents or complex equipment. The coating displays self-cleaning performance to detach the adhered oil after being immersed into water. The underwater contact angles were measured over 150° to various oils, further retaining stability in corrosive aqueous environments. Moreover, the coated glass shows resistance to water condensation, which can remain transparent after steaming or frosting, due to its hydrophilicity. The special wettability also endows the coated fabric with permselectivity to water and oil. Modified filter cotton was utilized to separate five kinds of oil/water mixtures. This study proposed a tried-and-true approach to realize oil repellency. It is anticipated that it could set a precedent for the design of self-cleaning or antifouling coatings.
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Biomass Conversion and Biorefinery
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2022
·
IF 4.05
Wang Jiacheng,Li Xingyong,Wu Yankun,Duan Jinyi,Zhuang Nihong,Wang Dechao,Zhang Zhaoxia,Ye Yueyuan,Li Shuirong,Zheng Zhifeng
The wide-scale application in the bio-fuel area of fatty acid methyl esters (FAME) has been limited because of its high oxygen content, awful low temperature flowability, and low heating value. In this work, the hydrodeoxygenation (HDO) of methyl palmitate as fatty acid methyl ester model compounds for long-chain alkane via Nb 2 O 5 modified NiAl 2 O 4 catalysts was investigated. The effect of Nb/Ni atomic ratio (0.05:0.30), reaction temperature (260–340 ℃), time (2–10 h), and H 2 pressure (1–5 MPa) on the production of long-chain alkane is exhaustively researched. The results show that the products are mainly pentadecane with a few other alkane hydrocarbons and nickel metal was the main active site. Besides, the added promoter Nb promoted the dispersion of active metal Nickel, increased the acidity, and thus substantially enhanced the HDO activity of methyl palmitate. In response to the best conditions (0.3 g catalyst, 3 g methyl palmitate), the methyl palmitate conversion and pentadecane selectivity over Nb 2 O 5 -NiAl 2 O 4 with 0.20 Nb/Ni atomic ratio reached 91.14% and 80.07%, respectively. However, the methyl palmitate conversion and pentadecane selectivity over pure NiAl 2 O 4 catalyst were only 62.53% and 74.67%, respectively. Therefore, Nb 2 O 5 -NiAl 2 O 4 catalysts exhibit remarkable catalytic ability for HDO of methyl palmitate to alkanes. The low cost, easy preparation, high catalytic performance, and recycling stability of Nb 2 O 5 -NiAl 2 O 4 catalyst demonstrate that catalyst Nb 2 O 5 -NiAl 2 O 4 is a promising effective and efficient catalyst for producing long-chain alkane from methyl palmitate. Graphical abstract
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高影响因子
JOURNAL OF SOLUTION CHEMISTRY
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2022
·Vol. 51
·期 7
·752-767
·
IF 2
Li Dan,Pang Yan,Wang Jingying,Sun Danlin,Zhang Xuena,Yue Danwei,Hao Longxia
Three C8 alkanes ( n -octane, iso -octane and ethyl cyclohexane) as additives were blended with methyl laurate to prepare binary systems of fuel blends for density, viscosity and refractive index measurement. The excess properties of volumes and viscosity of the three binary systems (methyl laurate + n -octane), (methyl laurate + iso -octane) and (methyl laurate + ethyl cyclohexane) were obtained and compared, which were also fitted to Redlich–Kister equation. The correlated values from Redlich–Kister equation are in good agreement with those from experimental data. The results can be used for the research of the mixture behaviors and development of biodiesel-diesel fuel blends.
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ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 27
·2201035
·
IF 19.924
Yaoxia Li,Zehang Cui,Guoqiang Li,Haoyu Bai,Ruyuan Dai,Yingzi Zhou,Yan Jiao,Yuegan Song,Yi Yang,Senyun Liu,Moyuan Cao
Manipulating oil droplets in an aqueous solution offers great opportunities to develop advanced devices in the fields of water remediation, chemical micro-reactor, etc. Although conical structures can achieve a directional oil droplet motion, the continuous and adaptive fluid self-transport in complicated environments is still a challenge. Inspired by the distinctive oil transport capability of fishbone and the anisotropic grooved structure of rice leaves, this work presents a multi-bioinspired grooved conical spine (BGCS) for improved oil manipulation. Benefiting from the cooperative effect of the asymmetric Laplace pressure and the surface capillary force, the BGCS possesses the reliable functions of ultrafast and continuous oil transport under water, in air, and even across the air–water interface. Compared with the original cone, the BGCS demonstrates a nine times faster transporting velocity and a five times larger capacity. It is envisioned that this updated oil-collecting cone with its cooperative structure should find real-world applications.
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高影响因子
危险品化学品经营许可证（带存储）