Adsorption of bisphenolic xenoestrogens on graphene: A peculiar adsorbate concentration dependence on the conformation of graphene
Adsorption of bisphenolic xenoestrogens on graphene: A peculiar adsorbate concentration dependence on the conformation of graphene
复制标题
双酚类异雌激素在石墨烯上的吸附：独特的吸附物浓度依赖于石墨烯的构象
DOI：
10.1016/j.jece.2016.04.012
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发表时间：
2016-06
影响因子：
7.7
通讯作者：
Heqing Tang
中科院分区：
文献类型：
--
作者：
Xiaobo Wang;Lihua Zhu;Libin Wan;Heqing Tang
石墨烯用于去除微污染水中的低水平环境内分泌物，并研究了在0.0005至70 mg L−1的很宽范围内对低水平双酚的吸附。结果表明，在较宽的浓度范围内，吸附等温线可分为两个区域：低浓度区符合Freundlich模型（相关系数R2> 0.99），高浓度区符合Langmuir模型（相关系数R2> 0.99）。这是由于吸附引起的石墨烯形貌的变化，这在石墨烯表面上产生了不同的吸附位点。热力学参数ΔG0、Δ H0和Δ S0表明吸附是一个自发的、放热的、熵减小的过程。这些参数的绝对值往往随着双酚浓度的增加而降低，这表明在较低浓度下，石墨烯上的结合位点对双酚的吸附具有更强的亲和力。正如一些表征和监测实验所证实的，增加的双酚吸附减少了由皱纹形成的表面沟槽区域，并增加了平坦区域。石墨烯的高度和低度褶皱（或平坦）的表面状态解释了所观察到的两阶段吸附等温线。
Graphene was used to remove low-level environmental endocrines in micro-polluted water with the aid of an investigation about the adsorption of bisphenols at low levels in a very wide range from 0.0005 to 70 mg L−1. It was found that over the wide concentration range, the adsorption isotherms could be divided into two regions: they followed the Freundlich model in the lower concentration region (correlation coefficient R2> 0.99), but obeyed the Langmuir model in the higher concentration region (R2> 0.99). This was attributed to the adsorption-induced changes in the morphology of graphene, which created different adsorption sites on the surface of graphene. The obtained values of thermodynamic parameters ΔG0, ΔH0and ΔS0indicated that the adsorption was a spontaneous, exothermic and entropy-decreasing process. The absolute values of these parameters tended to be decreased with increasing bisphenol concentration, suggesting stronger affinity of the binding sites on graphene for the adsorption of the bisphenols at lower concentrations. As confirmed by some characterization and monitoring experiments, the increased bisphenol adsorption decreased the surface grooved regions formed by wrinkles and increased the flat regions. The highly and lowly-wrinkled (or flat) surface states of graphene accounted for the observed two-stage adsorption isotherms.
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DOI：
10.1016/j.scitotenv.2009.10.049
发表时间：
2010
期刊：
The Science of the total environment
影响因子：
--
作者：
Y. Yoon;J. Ryu;Jeill Oh;B. Choi;S. Snyder
通讯作者：
Y. Yoon;J. Ryu;Jeill Oh;B. Choi;S. Snyder
使用表面分子印迹二氧化钛增强光催化降解和选择性去除硝基酚
影响因子：
11.4
作者：
Shen, Xiantao;Zhu, Lihua;Tang, Heqing
通讯作者：
Tang, Heqing
影响因子：
15
作者：
Quintana, Mildred;Grzelczak, Marek;Prato, Maurizio
通讯作者：
Prato, Maurizio
影响因子：
3.3
作者：
Y. Takai;O. Tsutsumi;Y. Ikezuki;Y. Kamei;Y. Osuga;T. Yano;Y. Taketan
通讯作者：
Y. Takai;O. Tsutsumi;Y. Ikezuki;Y. Kamei;Y. Osuga;T. Yano;Y. Taketan
影响因子：
13.6
作者：
C. Weng;Yao-Tung Lin;Tai-Wei Tzeng
通讯作者：
C. Weng;Yao-Tung Lin;Tai-Wei Tzeng