Janus三角纳米片和“三明治”三角纳米片消光特性的数值研究

doi:10.11949/0438-1157.20190532

摘要/Abstract

摘要：

基于离散偶极近似法(DDA)计算了不同组分的Janus三角纳米片和“三明治”三角纳米片的消光特性，两种纳米片在紫外-可见光波段均出现了明显的吸收峰。当纳米片较小时，消光特性主要以吸收为主，当纳米片逐渐增大，散射作用开始明显。当纳米片增大时，吸收峰向长波方向移动并且峰会变宽。二氧化硅与银的组合能在较宽的波段内激发表面等离激元效应，因此波峰比金银组合纳米片的波峰宽，但是吸收峰值较后者低。增加纳米片的层数，或者添加纳米片的组分，可以在一定范围内对纳米片的消光特性进行调节，从而提高太阳能光热转换效率。

关键词: 太阳能, 离散偶极近似, 消光特性, 光热转换特性, 纳米结构, 数值模拟

Abstract:

Direct absorption solar thermal collectors (DASC) explore the photo-thermal conversion characteristics of fluids to convert solar radiation into thermal energy. Plasmonic nanofluids have been used to improve the efficiency of DASC as working fluids, because of the localized surface plasmon resonance (LSPR) effect excited on the surface of metallic nanoparticles. Recently, Janus materials have witnessed fast development due to their diversified promising performances and practical applications. Compared with their spherical counterparts, Janus nanosheets have gained more concerns for their highly anisotropic shape. Herein, the discrete dipole approximation (DDA) is employed to calculate the extinction characteristics of Janus triangular nanosheets and sandwich-structured triangular nanosheets with different sizes. The results show that the LSPR of Janus nanosheets and sandwich-structured nanosheets can be improved by tuning the size. For Janus nanosheets, the thickness plays an important role on the resonance strength, whereas it has little effect on resonance frequency. On the contrary, the resonance strength and resonance frequency of sandwich-structured nanosheets can be influenced by the thickness evidently. Effective control of extinction characteristics can be achieved by varying the relative thickness of each layer of nanosheets, to adjust the extinction peak to the desired band. Optimizing the thickness of the Janus nanosheets and sandwich-structured nanosheets, or combining different sizes of nanosheets, will broaden the effective absorption band, thereby improve the photo-thermal conversion efficiency and the efficiency of direct absorption solar thermal collectors.

Key words: solar energy, discrete dipole approximation, extinction characteristics, photo-thermal conversion, nanostructure, numerical simulation

中图分类号:

TK 124

王甜蜜,唐桂华. Janus三角纳米片和“三明治”三角纳米片消光特性的数值研究[J]. 化工学报, 2019, 70(S2): 336-342.

Tianmi WANG,Guihua TANG. Plasmonic nanofluids based on Janus nanosheets and sandwich-structured nanosheets for solar energy harvest[J]. CIESC Journal, 2019, 70(S2): 336-342.

图/表 6

图1 Janus三角纳米片(a)和“三明治”三角纳米片(b)结构示意图

Fig.1 Structures of Janus triangular nanosheet (a) and sandwich-structured triangular nanosheet(b)

表1 Janus三角纳米片和“三明治”三角纳米片几何尺寸

Table 1 Geometric parameters of Janus triangular nanosheets and sandwich-structured triangular nanosheets

a _eff/nm	l/nm	h/nm	Janus三角纳米片层厚 /nm	“三明治”三角纳米片层厚 /nm
5	26.3	5.3	2.6	1.8
10	52.5	10.5	5.33	3.5
20	105.1	21.0	10.5	7.0
30	157.6	31.5	15.8	10.5
50	262.7	52.5	26.3	17.5
60	315.3	63.1	31.5	21.0
80	420. 4	84.1	42.0	28.0
100	525.5	105.1	52.5	35.0

图2 银、二氧化硅和金的介电函数

Fig.2 Dielectric function of silver, silica and gold

图3 银-二氧化硅Janus三角纳米片和银-金Janus三角纳米片的消光特性

Fig.3 Extinction characteristics of silver-silica Janus triangular nanosheets and silver-gold Janus triangular nanosheets

图4 银-二氧化硅-银“三明治”三角纳米片和银-金-银“三明治”三角纳米片的消光特性

Fig.4 Extinction characteristics of silver-silica-silver sandwich-structured triangular nanosheets and silver-gold-silver sandwich-structured triangular nanosheets

图5 二氧化硅-银-二氧化硅“三明治”三角纳米片的消光特性

Fig.5 Extinction characteristics of silica-silver-silica sandwich-structured triangular nanosheets

参考文献 30

1	Lund H , Mathiesen B V . Energy system analysis of 100% renewable energy systems—the case of Denmark in years 2030 and 2050 [J]. Energy, 2009, 34(5): 524-531.
2	Kalnæs S E , Jelle B P . Phase change materials and products for building applications: a state-of-the-art review and future research opportunities [J]. Energy and Buildings, 2015, 94: 150-176.
3	Lin Y , Alva G , Fang G . Review on thermal performances and applications of thermal energy storage systems with inorganic phase change materials [J]. Energy, 2018, 165: 685-708.
4	Thirugnanasambandam M , Iniyan S , Goic R . A review of solar thermal technologies [J]. Renewable and Sustainable Energy Reviews, 2010, 14(1): 312-322.
5	Wang J , O’Donnell J , Brandt A R . Potential solar energy use in the global petroleum sector [J]. Energy, 2017, 118: 884-892.
6	Li G , Shittu S , Diallo T M O , et al . A review of solar photovoltaic-thermoelectric hybrid system for electricity generation [J]. Energy, 2018, 158: 41-58.
7	Gorji T B , Ranjbar A A . Thermal and exergy optimization of a nanofluid-based direct absorption solar collector [J]. Renewable Energy, 2017, 106: 274-287.
8	Qin C , Kang K , Lee I , et al . Optimization of a direct absorption solar collector with blended plasmonic nanofluids [J]. Solar Energy, 2017, 150: 512-520.
9	Leong K Y , Ong H C , Amer N H , et al . An overview on current application of nanofluids in solar thermal collector and its challenges [J]. Renewable and Sustainable Energy Reviews, 2016, 53: 1092-1105.
10	Loni R , Asli-Ardeh E A , Ghobadian B , et al . Energy and exergy investigation of alumina/oil and silica/oil nanofluids in hemispherical cavity receiver: experimental study [J]. Energy, 2018, 164: 275-287.
11	Gorji T B , Ranjbar A A . A review on optical properties and application of nanofluids in direct absorption solar collectors (DASCs) [J]. Renewable and Sustainable Energy Reviews, 2017, 72: 10-32.
12	Minardi J E , Chuang H N . Performance of a “black” liquid flat-plate solar collector [J]. Solar Energy, 1975, 17(3): 179-183.
13	Liu X , Xuan Y . Full-spectrum volumetric solar thermal conversion via photonic nanofluids [J]. Nanoscale, 2017, 9(39): 14854-14860.
14	Green M A , Pillai S . Harnessing plasmonics for solar cells [J]. Nature Photonics, 2012, 6: 130-132.
15	Ma X C , Dai Y , Yu L , et al . Energy transfer in plasmonic photocatalytic composites [J]. Light: Science & Applications, 2016, 5: e16017.
16	Yang X , Yu H , Guo X , et al . Plasmon-exciton coupling of monolayer MoS₂-Ag nanoparticles hybrids for surface catalytic reaction [J]. Materials Today Energy, 2017, 5: 72-78.
17	An W , Wu J , Zhu T , et al . Experimental investigation of a concentrating PV/T collector with Cu₉S₅ nanofluid spectral splitting filter [J]. Applied Energy, 2016, 184: 197-206.
18	Hu J T , Odom T W , Lieber C M . Chemistry and physics in one dimension: synthesis and properties of nanowires and nano-tubes [J]. Accounts of Chemical Research, 1999, 32(5): 435-445.
19	Pan Z W , Dai Z R , Wang Z L . Nanobelts of semiconducting oxides [J].Science, 2001, 291: 1947-1949.
20	雷琴 . 利用DDA方法研究金属银及其核壳结构纳米粒子的光学性质[D]. 天津: 南开大学, 2014.
	Lei Q . Study on optical properties of metallic silver and its core-shell structure nanoparticles by DDA method [D]. Tianjin: Nankai University, 2014.
21	Xuan Y M , Duan H L , Li Q . Enhancement of solar energy absorption using a plasmonic nanofluid based on TiO₂/Ag composite nanoparticles [J]. RSC Advances, 2014, 4(31): 16206-16213.
22	Lv W , Phelan P E , Swaminathan R , et al . Multifunctional core-shell nanoparticle suspensions for efficient absorption [J]. Journal of Solar Energy Engineering, 2013, 135(2): 021004.
23	Wu Y , Zhou L , Du X , et al . Optical and thermal radiative properties of plasmonic nanofluids containing core–shell composite nanoparticles for efficient photothermal conversion [J]. International Journal of Heat and Mass Transfer, 2015, 82: 545-554.
24	Lai X . Recent advances in micro-/nano-structured hollow spheres for energy applications: from simple to complex systems [J]. Energy & Environmental Science, 2012, 5(2): 5604-5618.
25	Dong Z , Lai X , Halpert J E , et al . Accurate control of multishelled ZnO hollow microspheres for dye-sensitized solar cells with high efficiency [J]. Advanced Materials, 2012, 24(8): 1046-1049.
26	Lou X . Hollow micro/nanostructures: synthesis and applications [J]. Materials, 2008, 20(21): 3987-4019.
27	Grald E W , Kuehn T H . Performance analysis of a parabolic trough solar collector with a porous absorber receiver [J]. Solar Energy, 1989, 42(4): 281-292.
28	de Gennes P G . Soft matter [J]. Reviews of Modern Physics, 1992, 64(3): 645-648.
29	Du M , Tang G H . Plasmonic nanoﬂuids based on gold nanorods/nanoellipsoids/nanosheets for solar energy harvesting [J]. Solar Energy, 2016, 137: 393-400.
30	Rakić A D , Djurišić A B , Elazar J M , et al . Optical properties of metallic films for vertical-cavity optoelectronic devices [J]. Applied Optics, 1998, 37(22): 5271-5283.

[1]	宋嘉豪, 王文. 斯特林发动机与高温热管耦合运行特性研究[J]. 化工学报, 2023, 74(S1): 287-294.
[2]	张思雨, 殷勇高, 贾鹏琦, 叶威. 双U型地埋管群跨季节蓄热特性研究[J]. 化工学报, 2023, 74(S1): 295-301.
[3]	叶展羽, 山訸, 徐震原. 用于太阳能蒸发的折纸式蒸发器性能仿真[J]. 化工学报, 2023, 74(S1): 132-140.
[4]	张义飞, 刘舫辰, 张双星, 杜文静. 超临界二氧化碳用印刷电路板式换热器性能分析[J]. 化工学报, 2023, 74(S1): 183-190.
[5]	王志国, 薛孟, 董芋双, 张田震, 秦晓凯, 韩强. 基于裂隙粗糙性表征方法的地热岩体热流耦合数值模拟与分析[J]. 化工学报, 2023, 74(S1): 223-234.
[6]	齐聪, 丁子, 余杰, 汤茂清, 梁林. 基于选择吸收纳米薄膜的太阳能温差发电特性研究[J]. 化工学报, 2023, 74(9): 3921-3930.
[7]	何松, 刘乔迈, 谢广烁, 王斯民, 肖娟. 高浓度水煤浆管道气膜减阻两相流模拟及代理辅助优化[J]. 化工学报, 2023, 74(9): 3766-3774.
[8]	邢雷, 苗春雨, 蒋明虎, 赵立新, 李新亚. 井下微型气液旋流分离器优化设计与性能分析[J]. 化工学报, 2023, 74(8): 3394-3406.
[9]	韩晨, 司徒友珉, 朱斌, 许建良, 郭晓镭, 刘海峰. 协同处理废液的多喷嘴粉煤气化炉内反应流动研究[J]. 化工学报, 2023, 74(8): 3266-3278.
[10]	傅予, 刘兴翀, 王瀚雨, 李海敏, 倪亚飞, 邹文静, 雷月, 彭永姗. F₃EACl修饰层对钙钛矿太阳能电池性能提升的研究[J]. 化工学报, 2023, 74(8): 3554-3563.
[11]	程小松, 殷勇高, 车春文. 不同工质在溶液除湿真空再生系统中的性能对比[J]. 化工学报, 2023, 74(8): 3494-3501.
[12]	刘文竹, 云和明, 王宝雪, 胡明哲, 仲崇龙. 基于场协同和耗散的微通道拓扑优化研究[J]. 化工学报, 2023, 74(8): 3329-3341.
[13]	胡兴枝, 张皓焱, 庄境坤, 范雨晴, 张开银, 向军. 嵌有超小CeO₂纳米粒子的碳纳米纤维的制备及其吸波性能[J]. 化工学报, 2023, 74(8): 3584-3596.
[14]	洪瑞, 袁宝强, 杜文静. 垂直上升管内超临界二氧化碳传热恶化机理分析[J]. 化工学报, 2023, 74(8): 3309-3319.
[15]	黄可欣, 李彤, 李桉琦, 林梅. 加装旋转叶轮T型通道流场的模态分解[J]. 化工学报, 2023, 74(7): 2848-2857.