The behavior of hydroxide and hydronium ions at the hexadecane-water interface studied with second harmonic generation and zeta potential measurements

Wei Gan; Wei Wu; Fangyuan Yang; Deping Hu; Hui Fang; Zhenggang Lan; Qunhui Yuan

doi:10.1039/c7sm00813a

The behavior of hydroxide and hydronium ions at the hexadecane-water interface studied with second harmonic generation and zeta potential measurements

Wei Gan^*
, Wei Wu
, Fangyuan Yang
, Deping Hu
, Hui Fang
, Zhenggang Lan
, Qunhui Yuan

^*Corresponding author for this work

Harbin Institute of Technology Shenzhen
Xinjiang Technical Institute of Physics and Chemistry
Chinese Academy of Sciences
Xinjiang Normal University
CAS - Qingdao Institute of Biomass Energy and Bioprocess Technology

Research output: Contribution to journal › Article › peer-review

38 Scopus citations

Abstract

By probing the electric potential at the hexadecane-water interface with second harmonic generation and the zeta potential at the surface of a hexadecane droplet in its emulsion, we show that hydronium ions don't have a specific affinity to the oil-water interface although hydroxide ions do. The observed apparent affinity of the hydronium ions to the hexadecane-water interface is more likely a result of the electro-static attraction effect. The adsorption free energy of the hydroxide ions at the oil-water interface was estimated to be -8.3 kcal mol^-1. This study provides more experimental evidence for understanding the behavior of hydronium and hydoxide ions at the oil-water interface.

Original language	English
Pages (from-to)	7962-7968
Number of pages	7
Journal	Soft Matter
Volume	13
Issue number	43
DOIs	https://doi.org/10.1039/c7sm00813a
State	Published - 2017
Externally published	Yes

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title = "The behavior of hydroxide and hydronium ions at the hexadecane-water interface studied with second harmonic generation and zeta potential measurements",

abstract = "By probing the electric potential at the hexadecane-water interface with second harmonic generation and the zeta potential at the surface of a hexadecane droplet in its emulsion, we show that hydronium ions don't have a specific affinity to the oil-water interface although hydroxide ions do. The observed apparent affinity of the hydronium ions to the hexadecane-water interface is more likely a result of the electro-static attraction effect. The adsorption free energy of the hydroxide ions at the oil-water interface was estimated to be -8.3 kcal mol-1. This study provides more experimental evidence for understanding the behavior of hydronium and hydoxide ions at the oil-water interface.",

author = "Wei Gan and Wei Wu and Fangyuan Yang and Deping Hu and Hui Fang and Zhenggang Lan and Qunhui Yuan",

note = "Publisher Copyright: {\textcopyright} 2017 The Royal Society of Chemistry.",

year = "2017",

doi = "10.1039/c7sm00813a",

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volume = "13",

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journal = "Soft Matter",

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T1 - The behavior of hydroxide and hydronium ions at the hexadecane-water interface studied with second harmonic generation and zeta potential measurements

AU - Gan, Wei

AU - Wu, Wei

AU - Yang, Fangyuan

AU - Hu, Deping

AU - Fang, Hui

AU - Lan, Zhenggang

AU - Yuan, Qunhui

PY - 2017

Y1 - 2017

N2 - By probing the electric potential at the hexadecane-water interface with second harmonic generation and the zeta potential at the surface of a hexadecane droplet in its emulsion, we show that hydronium ions don't have a specific affinity to the oil-water interface although hydroxide ions do. The observed apparent affinity of the hydronium ions to the hexadecane-water interface is more likely a result of the electro-static attraction effect. The adsorption free energy of the hydroxide ions at the oil-water interface was estimated to be -8.3 kcal mol-1. This study provides more experimental evidence for understanding the behavior of hydronium and hydoxide ions at the oil-water interface.

AB - By probing the electric potential at the hexadecane-water interface with second harmonic generation and the zeta potential at the surface of a hexadecane droplet in its emulsion, we show that hydronium ions don't have a specific affinity to the oil-water interface although hydroxide ions do. The observed apparent affinity of the hydronium ions to the hexadecane-water interface is more likely a result of the electro-static attraction effect. The adsorption free energy of the hydroxide ions at the oil-water interface was estimated to be -8.3 kcal mol-1. This study provides more experimental evidence for understanding the behavior of hydronium and hydoxide ions at the oil-water interface.

UR - https://www.scopus.com/pages/publications/85033432719

U2 - 10.1039/c7sm00813a

DO - 10.1039/c7sm00813a

M3 - 文章

C2 - 29043365

AN - SCOPUS:85033432719

SN - 1744-683X

VL - 13

SP - 7962

EP - 7968

JO - Soft Matter

JF - Soft Matter

IS - 43

ER -

The behavior of hydroxide and hydronium ions at the hexadecane-water interface studied with second harmonic generation and zeta potential measurements

Abstract

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