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| 1 | Facile synthesis of nanoceria by a molten hydroxide method and its photocatalytic properties显示文摘Ceria nanoparticles were facilely synthesized by a molten NaOH-KOH hydroxide flux method with the precursor of Ce(NO3)3·6H2O under different conditions in alumina crucibles or Teflon-lined stainless steel autoclave.The XRD patterns and TEM images show that both the crystal and particle sizes of synthesized nanoceria are around 10 nm.XPS results reveal that the nanoceria obtained in alumina crucible has a Ce3+fraction of 17.1%which is higher than that of ceria synthesized in the Teflon vessel,the FTIR spectra of nanoceria prepared in alumina crucible show a stronger intensity of O-H stretching mode.UV-DRS and PL spectra results show that the nanoceria synthesized in alumina crucible with a calculated band gap of 2.9 eV has a wider responding light wavelength and a lower photogene rated electron-hole recombination rate,due to a higher concentration of oxygen vacancies(Ce^3+%).The photocatalytic results show that the degradation ratio and rate of the Rhodamine B(RhB)solution with the nanoceria synthesized in alumina crucible are 98.39%and 0.02919 min-1,both of which are larger than those of the ceria obtained from Teflon vessel.This method proves to be a simple and scalable way to synthesize nanoceria with rich oxygen vacancies and high photocatalytic activity. | Xuewen Xia Yuanpei Lan Junqi Li Chaoyi Chen Benjun Xu Xian Luo Xisong Mao | 2020 | Journal of Rare Earths2020，38，9： | 4 |
| 2 | Mixed Carbonate-Siliciclastic Deposits in a Channel Complex in the Northern South China Sea显示文摘New high-resolution 3D seismic data image a submarine channel complex in the northern slope of the South China Sea.The channel complex stretches hundreds of kilometers across the slope and flows into the deepsea from the siliciclastic shelf margin,linking neritic environment to the pelagic plain.The evolution of the channel complex developed two sedimentary stages,stage I(19.1–18.5 Ma)and stage II(18.5–17.5 Ma),separated by erosional surfaces.In the first stage,the complex was filled with pure siliciclastic sediments,forming thick-massive sandstone intercalated by thin layers of mudstone.During the stage II,the channel complex was deposited five carbonate-siliciclastic cycles.The unexpected channel-fill carbonate deposits present allochthonous characteristics,suggesting the siliciclastic channel was surprisingly used to transport carbonate sediment from the adjacent neritic carbonate platform.By analyzing the periodical carbonate sedimentary process in the siliciclastic channel complex,we infer that it was related to the in situ carbonate production of the neritic carbonate platform and was most likely to be controlled by the relative sea-level changes.Unlike line-source carbonate slope aprons or small-sized carbonate channels,the large-sized siliciclastic channel complex links directly neritic carbonate platform to deepwater basin and can transport large volumes of neritic carbonates to the pelagic environment in a short period.The new findings help to estimate the contributions of neritic siliciclastic shelf and carbonate platform to deepwater slope more accurately.This study suggests that channel systems are more complex than expected and have significant implications on the conceptual models describing the deepwater sedimentary theory. | Benjun Ma Shiguo Wu Lijun Mi Thomas Lüdmann Jinwei Gao Wei Gao | 2018 | Journal of Earth Science2018，29，3： | 1 |
| 3 | Effect of aluminium sol on microstructure and properties of corundum - mullite ceramic 显示文摘 | Cheng Benjun Guo Xingzhong Yang Hui | 2007 | Key Engineering Materials2007，，2： | 1 |
| 4 | Effect of Microsilica Addition on the Properties of Mullite-Corundum Ceramic显示文摘In this work, the effect of microsilica addition on properties of mullite-corundum ceramic specimens fired at temperatures from 1550℃ to 1700℃ has been investigated. It is found that the temperature at 1650℃ is an important turning point for the sintering of mullite-corundum ceramic. When the firing temperature exceeds 1650℃, the mullite phase will decompose, which affects the properties and microstructure of the ceramic. The bulk density of the ceramic decreases with the microsilica addition, but increases with the firing temperature from 1550℃up to 1700℃. The cold compressive strength of the specimens increases with firing temperature. Thermal shock resistance of the ceramic is strongly dependent on firing temperature, but little on the chosen microsilica addition. | CHENG Benjun GUO Xingzhong YANG Hui | 2006 | China's Refractories2006，15，2： | 1 |
| 5 | Dispersion behavior and stabilization mechanism of alumina powders in silica sol显示文摘 | Deyu Kong Hui Yang Yang Yang Su Wei Jiabang Wang Benjun Cheng | 2004 | Materials Letters2004，，27： | 1 |
| 6 | Modelling the formation and dissolution behavior of alumina agglomerate in the cryolite显示文摘The presence of alumina agglomerates seriously affects the current efficiency of the aluminum electrolysis process.Clarify the dynamic dissolution process of agglomerates is essential to improve the current efficiency of aluminum electrolysis.A mathematical model is proposed to describe the different phenomena from the formation until complete dissolution of agglomerates.Considering permeation and solidification processes of cryolite,a semi-analytical mathematical model is developed to formulate the formation,melting and dissolution processes of agglomerates,and the time duration for each stage is deduced.Porosity and heat mass transfer of agglomerates are explored based on the packing theory and mechanism of heat mass transfer in wet porous media.Dimensionless approach is applied to investigate the main factors affecting the dissolution stages and porosity of agglomerates.The results show that the superheat has a great influence on the formation and melting stage,the diameter of agglomerates can reach 14.93 mm for 200 particles agglomerated.The density decreases with the increase of agglomerated particle number,which varies in the range of 2.27-2.28 g/cm^(3).The average dissolution rate of agglomerates is about 1.83×10^(-5)-2.95×10^(-5) kg/s within the range of alumina concentration in this study. | Jiaqi Wang Mao Li Benjun Cheng Hesong Li | 2024 | Particuology2024，86，3： | 0 |
| 7 | Experimental Study on Glutinous Variety Improvement of Maize Population Yuzong 5显示文摘The representative samples were selected from Yuzong 5,and the methods of field planting and indoor measuring were employed for investigation and data processing on 894 plants of Yuzong 5.The results showed that the coefficients of variation about some traits of 894 plants were as follows: ear height(19.9%); panicle weight(35.1%); ear length(18.1%); ear row number(19.7%); number of kernels per row(22.5%); grain weight per panicle(36.3%); ear diameter(11.1%).It was found that there was large variation in these traits for various plants which could represent Yuzong 5 for glutinous variety improvement. | Benjun HOU Li LI Li LIN Huanli CHEN Minfen WANG Ding WANG Yun XIAO Cuiyun BAI | 2017 | Asian Agricultural Research2017，9，2： | 0 |
| 8 | Effect of aspect ratio of elliptical stirred vessel on mixing time and flow field characteristics in the absence of baffles显示文摘Elliptical tanks were used as an alternative to circular tanks in order to improve mixing efficiency and reduce mixing time in unbaffled stirred tanks(USTs). Five different aspect ratios of elliptical vessels were designed to compare their mixing time and flow field. Computational fluid dynamics(CFD) simulations were performed using the k–ε model to calculate the mixing time and simulate turbulent flow field features, such as streamline shape, velocity distribution, vortex core region distribution, and turbulent kinetic energy(TKE) transfer. Visualization was also carried out to track the tinctorial evolution of the liquid phase. Results reveal that elliptical stirred tanks can significantly improve mixing performance in USTs. Specifically, the mixing time at an aspect ratio of 2.00 is only 45.3% of the one of a circular stirred tank. Furthermore, the secondary flow is strengthened and the vortex core region increases with the increase of aspect ratio. The axial velocity is more sensitive to the aspect ratio than the circumferential and radial velocity. Additionally, the TKE transfer in elliptical vessels is altered. These findings suggest that elliptical vessels offer a promising alternative to circular vessels for enhancing mixing performance in USTs. | Yuan Yao Peiqiao Liu Qian Zhang Zequan Li Benjun Xi Changyuan Tao Yundong Wang Zuohua Liu | 2024 | Chinese Journal of Chemical Engineering2024，65，1： | 0 |
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