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FINITE ELEMENT MODELING FOR CONCRETE RANDOM PARTICLE MODEL
YanHui Yin,HaiWen Wang 한국멀티미디어학회 2006 한국멀티미디어학회 국제학술대회 Vol.2006 No.-
How to select the reasonable aggregate based on the engineering need and the actual condition of the locality and perform effectually computational simulation base on the type of the aggregate is important. This paper generalize the affection of all kinds of parameters of the aggregate to the concrete function base on the importance of concrete aggregate and lots of engineering background. The geometrical representation and finite element mesh of concrete random particle model are all generated automatically in this paper.
Junfeng Yang,Yuyang Wu,Yanhui Dong,Hao Cui,Chenyang Shi,Hang Sun,Shengyan Yin 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.111 No.-
Herein, a ternary Bi@H-TiO2/B-C3N4 type II heterostructure is successfully designed and prepared viametal Bi as cocatalyst for photocatalytic H2 generation. As expected, under k > 300 nm light, the highestphotocatalytic hydrogen production rate (HPR) of Bi@H-TiO2/B-C3N4 is up to 223.08 lmol g1 h1. Excitingly, under visible light (k > 400 nm), the highest HPR of Bi@H-TiO2/B-C3N4 is increased to18.84 lmol g1 h1, which is about 67.3 times, 37.7 times and 6.8 times as high as that of H-TiO2, BC3N4and H-TiO2/B-C3N4 under the same conditions, respectively. Moreover, the electrochemical impedancespectroscopy and transient photocurrent tests manifest that the interface resistance of Bi@HTiO2/B-C3N4 composite decreases and the photocurrent density increases after loading metal Bi. Theseresults indicate that loading metal Bi as cocatalyst (providing more electron trapping sites) is beneficialto improve photocatalytic activity in the type II heterostructure composite. And the electron transferdirections (B-C3N4 ? H-TiO2 ? Bi or B-C3N4 ? Bi) are proved by ultraviolet photoelectron spectroscopytest. Therefore, the Bi@H-TiO2/B-C3N4 photocatalyst with strong visible light absorption is expected to bea promising candidate in photocatalytic fields under visible light.