Investigation on photothermal properties of water-based carbon black nanofluids

doi:10.11949/0438-1157.20250434

Abstract

Abstract:

Nanofluids have become a research focus in the field of solar thermal applications due to their excellent photothermal conversion performance. In this paper, a two-step method was used to prepare water-based carbon black nanofluids with mass fractions in the range of 0.001%—0.02%, and their stability was characterized. The photothermal conversion performance of water-based carbon black nanofluids with different mass fractions was tested under simulated sunlight and natural light irradiation. It was found that within a certain range, with the increase of carbon black mass fraction, the photothermal conversion efficiency of the nanofluid was significantly improved. The photothermal conversion efficiency of 0.009% nanofluid under natural light can reach 60.31%, reflecting excellent photothermal conversion performance. This study confirmed that water-based carbon black nanofluid was an excellent solar photothermal conversion medium, which can achieve efficient solar photothermal conversion.

Key words: nanofluid, carbon black, solar energy, photothermal conversion

摘要：

纳米流体由于其优异的光热转换性能，已成为太阳能热应用领域的研究重点。采用两步法制备了质量分数在0.001%~0.02%范围内的水基炭黑纳米流体，并对其稳定性进行了表征。在模拟太阳光和自然光照射下对不同质量分数的纳米流体进行光热转换性能测试，发现在一定范围内随着炭黑质量分数的增加，纳米流体光热转换效率显著提高，0.009%的纳米流体在自然光照射下光热转换效率可以达到60.31%，体现出优异的光热转换性能。本研究证实了水基炭黑纳米流体是一种优异的太阳能光热转换介质，可以实现太阳能光热高效转换。

关键词: 纳米流体, 炭黑, 太阳能, 光热转换

CLC Number:

TK 01⁺9

Kai LI, Huan WANG, Liyuan YIN, Lulu NIU, Yang LIU, Weimin YANG, Ying AN. Investigation on photothermal properties of water-based carbon black nanofluids[J]. CIESC Journal, 2025, 76(10): 5362-5371.

李凯, 王欢, 尹丽媛, 牛璐璐, 刘洋, 杨卫民, 安瑛. 水基炭黑纳米流体光热性能研究[J]. 化工学报, 2025, 76(10): 5362-5371.

Figures/Tables 15

Table 1 Different concentration nanofluids

炭黑浓度/%（质量分数）

胶原蛋白浓度/%（质量分数）

0.001

0.003

0.005

0.007

0.009

0.015

0.02

0.06

0.1

0.14

0.18

0.3

0.4

Fig.1 Preparation process of water-based carbon black nanofluids

Fig.2 Schematic diagram of the indoor photothermal experimental platform

Fig.3 Experimental setup for photothermal conversion under natural sunlight

Fig.4 SEM images of carbon black nanoparticles

Fig.5 TEM images of carbon black nanoparticles in nanofluid

Fig.6 Static test results of nanofluids at different concentrations

Fig.7 Zeta potential of nanofluid

Fig.8 Absorbance of nanofluids at 750 nm

Fig.9 (a) Transmittance and (b) extinction coefficient of different concentrations of deionized water and carbon black nanofluids

Fig.10 Relationship between extinction coefficient and carbon black concentration

Fig.11 Experimental results of indoor photothermal conversion

Fig.12 Temperature distribution curves of nanofluids at different heights and concentrations

Fig.13 Photothermal conversion efficiency of nanofluids at different heights and concentrations

Fig.14 Experimental results of outdoor photothermal conversion

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