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Featured researches published by Xianguo Tuo.


Nano-micro Letters | 2018

Heterostructured ZnFe2O4/Fe2TiO5/TiO2 Composite Nanotube Arrays with an Improved Photocatalysis Degradation Efficiency Under Simulated Sunlight Irradiation

Kun Xiong; Kunzhou Wang; Lin Chen; Xinqing Wang; Qingbo Fan; Jérémie Courtois; Yuliang Liu; Xianguo Tuo; Minhao Yan

AbstractTo improve the visible light absorption and photocatalytic activity of titanium dioxide nanotube arrays (TONTAs), ZnFe2O4 (ZFO) nanocrystals were perfused into pristine TONTA pipelines using a novel bias voltage-assisted perfusion method. ZFO nanocrystals were well anchored on the inner walls of the pristine TONTAs when the ZFO suspensions (0.025xa0mgxa0mL−1) were kept under a 60xa0V bias voltage for 1xa0h. After annealing at 750xa0°C for 2xa0h, the heterostructured ZFO/Fe2TiO5 (FTO)/TiO2 composite nanotube arrays were successfully obtained. Furthermore, Fe3+ was reduced to Fe2+ when solid solution reactions occurred at the interface of ZFO and the pristine TONTAs. Introducing ZFO significantly enhanced the visible light absorption of the ZFO/FTO/TONTAs relative to that of the annealed TONTAs. The coexistence of type I and staggered type II band alignment in the ZFO/FTO/TONTAs facilitated the separation of photogenerated electrons and holes, thereby improving the efficiency of the ZFO/FTO/TONTAs for photocatalytic degradation of methylene blue when irradiated with simulated sunlight.n


Journal of Hazardous Materials | 2018

(Ce-Al)-oxide pillared bentonite: A high affinity sorbent for plutonium

Yangchun Leng; Qintang Li; Qiang Tian; Xiaoyuan Chen; László Almásy; Yuliang Liu; Guangai Sun; Xianguo Tuo; Minhao Yan; Mark Julian Henderson

The ability of bentonite and montmorillonite pillared by Al-oxide and mixed (Ln-Al)-oxides (Lnu202f=u202fLa, Ce) to remove 239plutonium solution species from water is comparatively investigated at pH 7 and pH 4. Small-angle scattering and neutron contrast variation with H2O/D2O mixtures is used to verify the ingress of water in the calcined products after hydrophilicity was introduced by an NH3-H2O vapor treatment. The size and shape of the (La/Ce)-Al oxo-hydroxy pillaring cations (2u202fnm spheres) is determined by small-angle x-ray scattering from the pillaring solutions. Not all of the oxide pillars improved Pu uptake compared with sodium montmorillonite. At neutral and acidic pH only (Ce-Al)-oxide pillared clays showed the ability to remove Pu over the concentration range studied (1.35u202f×u202f10-8-8u202f×u202f10-8u202fmolu202fdm-3) with distribution coefficient (KD) values >104. XPS analysis of the (Ce-Al)-oxide pillared clays indicates the presence of Ce4+ as cerium dioxide. The progressive improvement in sorption performance in the order of pillar type Al2O3u202f<u202fLa2O3-Al2O3u202f<<u202fCeO2-Al2O3 reflects the increasing access of Pu solution species to the clay mineral layers by changes to the basal spacing and specific surface area, and also to the higher stability of the (Ce-Al)-oxide pillars.


Physics of Plasmas | 2017

Characteristics of a KA-band third-harmonic peniotron driven by a high-quality linear axis-encircling electron beam

Xiaoyun Zhao; Xianguo Tuo; Qing Ge; Ying Peng

We employ a high-quality linear axis-encircling electron beam generated by a Cuccia coupler to drive a Ka-band third-harmonic peniotron and develop a self-consistent nonlinear calculation code to numerically analyze the characteristics of the designed peniotron. It is demonstrated that through a Cuccia coupler, a 6u2009kV, 0.5u2009A pencil beam and an input microwave power of 16u2009kW at 10u2009GHz can generate a 37u2009kV, 0.5u2009A linear axis-encircling beam, and it is characterized by a very low velocity spread. Moreover, the electron beam guiding center deviation can be adjusted easily. Driven by such a beam, a 30u2009GHz, Ka-band third-harmonic peniotron is predicted to achieve a conversion efficiency of 51.0% and a microwave output power of 9.44u2009kW; the results are in good agreement with the Magic3D simulation. Using this code, we studied the factors influencing the peniotron performance, and it can provide some guidelines for the design of a Ka-band third-harmonic peniotron driven by a linear electron beam and can promote t...


Physics of Plasmas | 2017

Research on the high power cyclotron-wave rectifier

Xiaoyun Zhao; Xianguo Tuo; Qing Ge; Ying Peng

As a key component of a Wireless Power Transmission System, a cyclotron-wave rectifier, a high power microwave to DC converter, has received more attention from scholars. This paper comprehensively analyzes various limiting factors of the output voltage and current. The results show that high frequency breakdown, the external magnetic field, and engineering realization limit the output voltage, and the space charge force limits the beam current. On this basis, by using the equivalent circuit and particle simulation, we design a cyclotron-wave rectifier with high power. The simulation results demonstrate that working at 2.45u2009GHz, the rectifier can obtain an output voltage of 113u2009kV and an output power of 791u2009kW. These conclusions can provide guidance for designing and application of this device.


International Confernece Pacific Basin Nuclear Conference | 2016

Study on Effect of Density Heterogeneity for Nuclear Waste Drum Samples in Segmented Gamma Scanning Analysis

Honglong Zheng; Xianguo Tuo; Shuming Peng; Rui Shi; Chao Deng

With a segmented gamma scanning (SGS) equipment, the non-destructive transmission and emission measurement are experimented for eight radioactive waste samples with heterogeneous activity and matrix distribution. Radioactivity of both 137Cs and 60Co sources in those samples is calculated through a self-absorption correction method. The results show that the relative deviations between corrected and actual radioactivity of eight samples are all less than 5%. Then the effect of density heterogeneity for nuclear waste drum samples was studied, indicating that the SGS analyzed radioactivity will be deviated from its actual radioactivity along with different density of samples. With filling material density heterogeneity and average density of samples increasing, the relative deviations between corrected and actual radioactivity trend to increase gradually. The heterogeneity immediately determines the scale of relative deviations in SGS analysis. The density of samples, the energy and transmission ability of gamma ray are main factors of the deviation in SGS analysis.


Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2017

Colloidal assembly of magnetic nanoparticles and polyelectrolytes by arrested electrostatic interaction

Huailiang Li; Mark Julian Henderson; Kunzhou Wang; Xianguo Tuo; Yangchun Leng; Kun Xiong; Yuliang Liu; Yong Ren; Jérémie Courtois; Minhao Yan


Materials Chemistry and Physics | 2018

Thickness determination of ultrathin poly(acrylic acid) shell on γ-Fe2O3 nanocore via small-angle scattering

Huailiang Li; Kunzhou Wang; Xianguo Tuo; László Almásy; Qiang Tian; Guangai Sun; Mark Julian Henderson; Qintang Li; András Wacha; Jérémie Courtois; Minhao Yan


Journal of Nuclear Materials | 2018

Fabrication and chemical durability of hot-pressed Na-bearing fluorapatite-type Ca 8 Sm 1 Na 1 (PO 4 ) 6 F 2 ceramic for immobilization of trivalent minor actinide

Xiaonan Gao; Yi Huang; Yuancheng Teng; Minhao Yan; Haibin Zhang; Xianguo Tuo; Shuming Peng


Sensors and Actuators B-chemical | 2018

Ortho-hydroxyl-oriented tandem-responsive diacylhydrazones with super sensitivity for Al 3+ and subsequent potential recognition of Cu 2+

Hua Liang; Zongchen Li; Daqiang Wu; Ke Dai; Luyao Zhong; Yonggang Liu; Minhao Yan; Xianguo Tuo


Nuclear Science and Techniques | 2018

Determination of Gamma point source efficiency based on a back-propagation neural network

Honglong Zheng; Xianguo Tuo; Shu-Ming Peng; Rui Shi; Huailiang Li; Jing Lu; Jin-Fu Li

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Minhao Yan

Southwest University of Science and Technology

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Jérémie Courtois

Southwest University of Science and Technology

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Guangai Sun

China Academy of Engineering Physics

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Honglong Zheng

China Academy of Engineering Physics

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Huailiang Li

Southwest University of Science and Technology

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Kunzhou Wang

Southwest University of Science and Technology

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Mark Julian Henderson

Southwest University of Science and Technology

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Qiang Tian

Southwest University of Science and Technology

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Qintang Li

Southwest University of Science and Technology

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Rui Shi

Sichuan University of Science and Engineering

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