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| 1 | Chemical dehydration coupling multi-effect evaporation to treat waste sulfuric acid in titanium dioxide production process显示文摘In order to concentrate the diluted sulfuric acid from the titanium dioxide(TiO2)production of sulphate process,a new concentration process was proposed by coupling chemical dehydration and multi-effect evaporation.The ferrous sulfate monohydrate(FeSO4·H2O),as the dehydrant,was added to the diluted sulfuric acid to form ferrous sulfate heptahydrate(FeSO4·7H2O)according to the H2SO4-FeSO4-H2O phase diagrams,which partially removes the water.This process was named as Chemical Dehydration Process.The residual water was further removed by two-effect evaporation and finally 70 wt%sulfuric acid was obtained.The FeSO4·H2O can be regenerated through drying and dehydration of FeSO4·7H2O.The results show that FeSO4·H2O is the most suitable dehydrant,the optimal reaction time of chemical dehydration process is 30 min,and low temperature is favorable for the dehydration reaction.45.17%of the entire removed water can be removed by chemical dehydration from the diluted sulfuric acid.This chemical dehydration process is also energy efficient with 24.76%saving compared with the direct evaporation process.Furthermore,51.21%of the FeSO4 dissolved originally in the diluted sulfuric acid are precipitated out during the chemical dehydration,which greatly reduces the solid precipitation and effectively alleviates the scaling in the subsequent multi-effect evaporation process. | Hongyin Pang Ruifang Lu Tao Zhang Li Lü Yanxiao Chen Shengwei Tang | 2020 | Chinese Journal of Chemical Engineering2020，28，4： | 7 |
| 2 | Preparation and Electrochemical Performance of Li[Ni1/3Co1/3Mn1/3]O2 Synthesized Using LizCO3 as Template显示文摘 | Jibin Zhang Yanjun Zhong Xiaxing Shi Zhuo Zheng Weibo Hua Yanxiao Chen Wenyuan Liu Benhe Zhong | 2015 | Chinese Journal of Chemistry2015，33，11： | 2 |
| 3 | Fe-Nx Sites enriched microporous carbon nanoflower planted with tangled bamboo-like carbon nanotube as a strong polysulfides anchor for lithium-sulfur batteries显示文摘Serious shuttle effect and sluggish conversion kinetics of lithium polysulfides(LiPSs)have a massive impact on obstructing the practical application of lithium-sulfur(Li-S)batteries.To address such issues,Fe-Nx sites enriched microporous nanoflowers planted with tangled bamboo-like carbon nanotubes(Fe-Nx-C/Fe_(3)C-CNTs NFs)are found to be effective catalytic mediators with strong anchoring capabilities for LiPSs.The bamboo-like carbon nanotubes catalyzed by Fe_(3)C/Fe entangled each other to form a conductive network,which encloses a flowerlike microporous carbon core with embedded well-dispersed Fe-Nx active sites.As expected,electrons smoothly transfer along the dense conductive bamboo-like carbon network while the flower-like carbon core consisting of micropores induces the homogeneous distribution of tiny sulfur and favors the lithium ions migration with all directions.Meanwhile,Fe-Nx sites strongly trap long-chain LiPSs with chemical anchoring,and catalyze the redox conversion of LiPSs.Due to the aforementioned synergistic effects,the S@Fe-Nx-C/Fe_(3)C-CNTs NFs cathode exhibited a remarkable specific capacity(635 mAh g_(s)^(-1))at 3 C and a favorable capacity decay with 0.04%per cycle even after 400 cycles at 1 C. | Hongtai Li Yanxiao Chen Quan Jin Wei Xiang Benhe Zhong Xiaodong Guo Bao Wang | 2021 | Green Energy & Environment2021，6，4： | 1 |
| 4 | Simulation of the hydrodynamics and mass transfer in a falling film wavy microchannel显示文摘The flow in a liquid falling film is predominantly laminar,and the liquid-side mass transfer is limited by molecular diffusion.The effective way to enhance the mass transfer is to improve the liquid film flow behavior.The falling film behaviors of water,ethanol and ethylene glycol in nine different wavy microchannels were simulated by Computational Fluid Dynamics.The simulation results show that the falling film thickness exhibits a waveform distribution resulting in a resonance phenomenon along the wavy microchannel.The fluctuation of liquid film surface increases the gas-liquid interface area,and the internal eddy flow inside the liquid film also improves the turbulence of liquid film,the gas-liquid mass transfer in falling film microchannels is intensified.Compared with flat microchannel,the CO_(2) absorption efficiency in water in the wavy microchannel is improved over 41%.Prediction models of liquid film amplitude and average liquid film thickness were established respectively. | Siyuan Chen Tao Zhang Li Lv Yanxiao Chen Shengwei Tang | 2021 | Chinese Journal of Chemical Engineering2021，34，6： | 1 |
| 5 | Adsorption properties of oxidized carboxymethyl starch and cross -linked carboxymethyl starch for calcium ion显示文摘 | Chen Yanxiao Wang Gongying | 2006 | Colloids and Surfaces A: Physicochemical and Engineering Aspects2006，289，13： | 1 |
| 6 | Kinetics and adsorption behavior of carboxymethyl starch on a-alumina in aqueous medium显示文摘 | Yanxiao Chen Shaoying Liu Gongying Wang | 2006 | Journal of Colloid and Interface Science2006，303，2： | 1 |
| 7 | Adsorption properties of oxidized carboxymethyl starch and cross-linked carboxymethyl starch for calcium ion显示文摘 | Chen Yanxiao Wang Gongying | 2006 | Colloids and Surface A2006，289，： | 1 |
| 8 | CO adsorption on a Pt(111) surface partially covered with FeO_x nanostructures显示文摘The adsorption of CO on Pt group metals, as a most fundamental elementary reaction step, has been widely studied in catalysis and electrocatalysis. Particularly, the structures of CO on Pt(111) have been extensively investigated, owing to its importance to both fundamental and applied catalysis. Yet, much less is known regarding CO adsorption on a Pt(111) surface modulated by supported oxide nanostructures,which is of more relevance to technical catalysis. We thus investigated the coverage-dependent adsorption of CO on a Pt(111) surface partially covered by Fe Oxnanostructures, which has been demonstrated as a remarkable catalyst for low-temperature CO oxidation. We found that, due to its strong chemisorption, the coverage-dependent structure of CO on bare Pt is not influenced by the presence of Fe Ox. But,oxygen-terminated Fe Oxnanostructures could modulate the diffusivity of CO at their vicinity, and thus affect the formation of ordered CO superstructures at low temperatures. Using scanning tunneling microscopy(STM), we inspected the diffusivity of CO, followed the phase transitions of CO domains, and resolved the molecular details of the coverage-dependent CO structures. Our results provide a full picture for CO adsorption on a Pt(111) surface modulated by oxide nanostructures and shed lights on the inter-adsorbate interaction on metal surfaces. | Yun Liu Fan Yang Yanxiao Ning Qingfei Liu Yi Zhang Hao Chen Xinhe Bao | 2017 | Journal of Energy Chemistry2017，26，4： | 1 |
| 9 | Adsorption properties of oxidized carboxymethyl starch and cross-linked carboxymethyl starch for calcium ion 显示文摘 | Chen Yanxiao Wang Gongying | 2006 | Colloids and Surfaces A : Physicochem Eng Aspects2006，289，： | 1 |
| 10 | A kinetic investigation of cationic starch adsorption and flocculation in kaolin suspension显示文摘 | Yanxiao Chen Shaoying Liua Gongying Wang | 2007 | Chemical Engineering Journal2007，133，13： | 1 |
| 11 | Ultra-low lattice thermal conductivity and promising thermoelectric figure of merit in borophene via chlorination显示文摘Monolayer boron-based materials are of current interests due to its polymorphism.Herein,motivated by the recent experimental synthesis of semiconducting hydrogenatedαʹ-borophene and the regulation of the physical properties in layered materials by surface functionalization,we study the thermal and electronic properties ofαʹ-borophene with three different types of gas functional groups(H,F,and Cl)based on first-principles and Boltzmann transport theory.It is found thatαʹ-borophene can be well stabilized by fluorination and chlorination and maintain the semiconductor nature.More interestingly,when hydrogen is replaced with fluorine or chlorine,the lattice thermal conductivity changes from 24.3 to 5.2 or 0.73 W/(m·K)along armchair direction at 300 K,exhibiting a huge reduction by two orders of magnitude.The main reason is the decrease of both phonon group velocities and acoustic phonon relaxation time resulting from the strong phonon mode softening due to the weaken B-B bond strength and heavier atomic mass of fluorine and chlorine.Consequently,the chlorinatedαʹ-borophene exhibits a high thermoelectric figure of merit~2 at 300 K along armchair direction.Our study illustrates the importance of the modulation of transport properties by gas functional groups,which may promote the thermoelectric application of boron-based materials. | Jia He Yanxiao Hu Dengfeng Li Jie Chen | 2022 | Nano Research2022，15，4： | 1 |
| 12 | Involvement of insulin in early development of mouse one-cell stage embryos显示文摘Recent studies have suggested that growth factors and hormones play important roles in cell prolif-eration and differentiation during early embryonic development. In the present study, we examined the expression and localization of insulin in the mouse oocytes and one-cell stage embryos by quantitative ELISA, RT-PCR, Western blot and immunofluorescence. In the mouse oocytes and one-cell stage em-bryos, expression of insulin was uniformly distributed in the cytoplasm. We also examined the expres-sion, activity and localization of mTOR (mammalian target of rapamycin) and p70S6K. The expression of mTOR and p70S6K was not significantly different at the cell cycle of mouse one-cell stage embryos. mTOR and S6K were distributed evenly in the cytoplasm at G1, G2 and M phase phase, but at S phase, the distribution of mTOR and S6K was around the pronucleus. At different phases, the activity of mTOR fluctuated. We also used the PI3K specific inhibitor-Wortmannin to investigate the cleavage rate of eggs. The result showed that the rate obviously decreased. When the mTOR specific inhibitor Rapa-mycin was used, the first mitotic division of the mouse one-cell stage embryo was delayed. These re-sults suggested that insulin was expressed both in mouse oocytes and one-cell stage embryos, and may play functional roles in regulation of mouse early embryogenesis by activating the signal pathway of PI3K/PKB/mTOR/S6K. | YU BingZhi, ZHANG Zhe, DENG Xin, XU XiaoYan, FENG Chen, LI YanXiao, CUI Cheng, SU WenHui, ZHAO HongMei & YU DaHai Department of Biochemical and Molecular Biology, China Medical University, Shenyang 110001, China | 2008 | Science China(Life Sciences)2008，51，9： | 1 |
| 13 | Kinetics and adsorption behavior of carboxymethyl starch on α -alumina in aqueous medium显示文摘 | Yanxiao Chen Shaoying Liu Gongying Wang | 2006 | Journal of Colloid And Interface Science2006，，2： | 1 |
| 14 | A kinetic investigation of cationic starch adsorption and flocculation in kaolin suspension 显示文摘 | Yanxiao Chen Shaoying Liua Gongying Wang | 2007 | Chemical Engineering Journal2007，133，13： | 1 |
| 15 | In vivo noninvasive detection of chlorophyll distribution in cucumber ( Cucumis sativus ) leaves by indices based on hyperspectral imaging显示文摘 | Zou Xiaobo Shi Jiyong Hao Limin Zhao Jiewen Mao Hanpin Chen Zhenwei Li Yanxiao Mel Holmes | 2011 | Analytica Chimica Acta2011，，1： | 1 |
| 16 | Synthesis and Physi- cochemical Properties of Graft Copolymer of Corn Starch and Acrylam- ide 显示文摘 | Chen Yanxiao Liu Shaoying Wang Gongying | 2006 | Polymer Composites2006，27，6： | 1 |
| 17 | Crystal-plane-dependent redox reaction on Cu surfaces显示文摘The dynamic redox process of surface oxide layers on metal surfaces is of great significance for understanding the active phase in catalytic reactions.We studied the formation of surface oxide layers on Cu(111)and Cu(110)in O2,as well as the subsequent reduction by CO using in situ scanning tunneling microscopy(STM)and X-ray photoelectron spectroscopy(XPS).By monitoring and comparing the oxidation process of Cu(111)and Cu(110)surfaces,we found a crystal-plane-dependent reaction mechanism,which also applies to the reduction of surface oxide layers on Cu surfaces.We found XPS Cu spectra cannot be used to identify the various surface oxide layer on Cu surfaces,suggesting their presence in catalytic reactions might have been overlooked.The combination of STM and XPS studies are thus advantageous in identifying surface oxide structures and pinpointing the active phases in the redox process,which paves the way for engineering the catalyst and reaction environment for optimized catalytic performances. | Yangsheng Li Hao Chen Weijia Wang Wugen Huang Yanxiao Ning Qingfei Liu Yi Cui Yong Han Zhi Liu Fan Yang Xinhe Bao | 2020 | Nano Research2020，13，6： | 0 |
| 18 | Teaching Chinese sign language with a smartphone显示文摘Background There is a large group of deaf-mutes worldwide, and sign language is a major communication tool in this community. It is necessary for deaf-mutes to be able to communicate with others who are capable of hearing, and hearing people also need to understand sign language, which produces a great demand for sign language tuition. Even though there have already been a large number of books written about sign language, it is inefficient to learn sign language through reading alone, and the same can be said on watching videos. To solve this problem, we developed a smartphone-based interactive Chinese sign language teaching system that facilitates sign language learning. Methods The system provides a learner with some learning modes and captures the learner's actions using the front camera of the smartphone. At present, the system provides a vocabulary set with 1000 frequently used words, and the learner can evaluate his/her sign action by subjective or objective comparison. In the mode of word recognition, the users can play any word within the vocabulary, and the system will return the top three retrieved candidates;thus, it can remind the learners what the sign is. Results This system provides interactive learning to enable a user to efficiently learn sign language. The system adopts an algorithm based on point cloud recognition to evaluate a user's sign and costs about 700ms of inference time for each sample, which meets the real-time requirements. Conclusion This interactive learning system decreases the communication barriers between deaf-mutes and hearing people. | Yanxiao ZHANG Yuecong MIN Xilin CHEN | 2021 | Virtual Reality & Intelligent Hardware2021，3，3： | 0 |
| 19 | Effect of current density on groundwater arsenite removal performance using air cathode electrocoagulation显示文摘Naturally occurring arsenic enrichment in groundwater poses a huge threat to human health.Air cathode electrocoagulation(ACEC)has recently been proposed to enhance As(Ⅲ)oxidation and lower energy consumption.In this study,ACEC,EC/O_(2) and EC/N_(2) were evaluated with different current densities from 1 to 8 mA/cm^(2) to investigate the effect on As(Ⅲ)removal in different redox environments.Current density had no appreciable effect on arsenic removal efficiency given the same charge in ACEC because the concentration ratio of Fe/H2O_(2) under different current densities remained stable.However,in EC/O_(2) and EC/N_(2),As(Ⅲ)removal was inhibited at higher current densities(4–8 mA/cm^(2)),likely because more Fe(Ⅱ)competed with As(Ⅲ)for the oxidant,leading to less effective oxidation of As(Ⅲ).In all EC systems,the$OH units generated per power consumption reached the highest value at the lowest current density.Compared with other EC systems,the ACEC system showed lower energy consumption at all current densities due to the low energy consumption of the electrode reaction and more free radical generation.A lower current density saved more energy at the expense of time,showing the trade-off relationship between energy consumption and removal time.The operation costs for As(Ⅲ)removal under optimal conditions were calculated as 0.028$/m^(3) for ACEC,0.030$/m^(3) for EC/O_(2),and 0.085$/m^(3) for EC/N_(2) | Yanxiao Si Fang Zhang Chen Hong Guanghe Li Haichuan Zhang Dun Liu | 2021 | Frontiers of Environmental Science & Engineering2021，15，6： | 0 |
| 20 | Operando surface science methodology reveals surface effect in charge storage electrodes显示文摘Surface and interface play critical roles in energy storage devices,calling for operando characterization techniques to probe the electrified surfaces/interfaces.In this work,surface science methodology,including electron spectroscopy and scanning probe microscopy,has been successfully applied to visualize electrochemical processes at operating electrode surfaces in an Al/graphite model battery.Intercalation of anions together with cations is directly observed in the surface region of a graphite electrode with tens of nanometers thickness,the concentration of which is one order higher than that in bulk.An intercalation pseudocapacitance mechanism and a double specific capacity in the electrode surface region are expected based on the super-dense intercalants and anion/cation co-intercalation,which are in sharp contrast to the battery-like mechanism in the electrode bulk.The distinct electrochemical mechanism at the electrode surface is verified by performance tests of real battery devices,showing that a surface-dominant,nanometer-thick graphite cathode outperforms a bulk-dominant,micrometer-thick graphite cathode.Our findings highlight the important surface effect of working electrodes in charge storage systems. | Chao Wang Yanxiao Ning Haibo Huang Shiwen Li Chuanhai Xiao Qi Chen Li Peng Shuainan Guo Yifan Li Conghui Liu Zhong-Shuai Wu Xianfeng Li Liwei Chen Chao Gao Chuan Wu Qiang Fu | 2021 | National Science Review2021，8，3： | 0 |
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