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A Highly Sensitive Electrochemical Sensor Based on β-cyclodextrin Functionalized Multi-Wall Carbon Nanotubes and Fe3O4 Nanoparticles for Rutin Detection
被引:8
作者:

Zhao, Wen-Jun
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Henan Univ, Sch Life Sci, Kaifeng 475000, Peoples R China Henan Univ, Sch Life Sci, Kaifeng 475000, Peoples R China

Xiao, Bao-Lin
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Henan Univ, Sch Life Sci, Kaifeng 475000, Peoples R China Henan Univ, Sch Life Sci, Kaifeng 475000, Peoples R China

Song, Xin-Yan
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机构:
Henan Univ, Sch Life Sci, Kaifeng 475000, Peoples R China Henan Univ, Sch Life Sci, Kaifeng 475000, Peoples R China

Meng, Xin
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机构:
Henan Univ, Sch Life Sci, Kaifeng 475000, Peoples R China Henan Univ, Sch Life Sci, Kaifeng 475000, Peoples R China

Ma, Xin-Xin
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机构:
Henan Univ, Sch Life Sci, Kaifeng 475000, Peoples R China Henan Univ, Sch Life Sci, Kaifeng 475000, Peoples R China

Li, Yang-Yang
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h-index: 0
机构:
Henan Univ, Sch Life Sci, Kaifeng 475000, Peoples R China Henan Univ, Sch Life Sci, Kaifeng 475000, Peoples R China

Hong, Jun
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h-index: 0
机构:
Henan Univ, Sch Life Sci, Kaifeng 475000, Peoples R China Henan Univ, Sch Life Sci, Kaifeng 475000, Peoples R China

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机构:
[1] Henan Univ, Sch Life Sci, Kaifeng 475000, Peoples R China
[2] Univ Tehran, Inst Biochem & Biophys, Tehran, Iran
基金:
中国国家自然科学基金;
美国国家科学基金会;
关键词:
COMPOSITE ELECTRODE;
GRAPHENE;
FLAVONOIDS;
ACID;
NANOCOMPOSITES;
EXTRACTION;
BIOSENSOR;
PEROXIDASE;
SEPARATION;
REMOVAL;
D O I:
10.1149/1945-7111/ac61bf
中图分类号:
O646 [电化学、电解、磁化学];
学科分类号:
081704 ;
摘要:
A functionalized nanocomposites composed of multi-wall carbon nanotubes (MWCNTs), Fe3O4 nanoparticles (Fe3O4) and beta-cyclodextrin (CD) was prepared. The MWCNTs-CD-Fe3O4 modified glassy carbon electrode (GCE) displayed good electrochemical response towards rutin (Ru). The detection linear range and the detection limit of the electrochemical sensor for Ru were 0.02-10 mu M and 16.4 nM, respectively. The results of actual sample detection were consistent with those of ultra-high performance liquid chromatography (UHPLC). The modified materials were also analyzed by UV-visible spectroscopy (UV-Vis)?transmission electrode microscope (TEM), and electrochemical impedance spectroscopy (EIS), respectively. The prepared nanocomposites integrate the excellent electric conductivity and electrocatalytic activity of MWCNTs and Fe3O4, as well as the disperse ability of CD, and may play a synergistic role in the electrochemical response of the modified electrode towards Ru. Moreover, the prepared sensor had good anti-interference ability and potential application in the actual content detection of drugs.
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页数:8
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[51]
A general quantitative pH sensor developed with dicyandiamide N-doped high quantum yield graphene quantum dots
[J].
Wu, Zhu Lian
;
Gao, Ming Xuan
;
Wang, Ting Ting
;
Wan, Xiao Yan
;
Zheng, Lin Ling
;
Huang, Cheng Zhi
.
NANOSCALE,
2014, 6 (07)
:3868-3874

Wu, Zhu Lian
论文数: 0 引用数: 0
h-index: 0
机构:
Southwest Univ, Key Lab Luminescent & Real Time Analyt Chem, Minist Educ, Coll Chem & Chem Engn, Chongqing 400715, Peoples R China Southwest Univ, Key Lab Luminescent & Real Time Analyt Chem, Minist Educ, Coll Chem & Chem Engn, Chongqing 400715, Peoples R China

Gao, Ming Xuan
论文数: 0 引用数: 0
h-index: 0
机构:
Southwest Univ, Key Lab Luminescent & Real Time Analyt Chem, Minist Educ, Coll Chem & Chem Engn, Chongqing 400715, Peoples R China Southwest Univ, Key Lab Luminescent & Real Time Analyt Chem, Minist Educ, Coll Chem & Chem Engn, Chongqing 400715, Peoples R China

Wang, Ting Ting
论文数: 0 引用数: 0
h-index: 0
机构:
Southwest Univ, Coll Pharmaceut Sci, Chongqing 400716, Peoples R China Southwest Univ, Key Lab Luminescent & Real Time Analyt Chem, Minist Educ, Coll Chem & Chem Engn, Chongqing 400715, Peoples R China

Wan, Xiao Yan
论文数: 0 引用数: 0
h-index: 0
机构:
Southwest Univ, Coll Pharmaceut Sci, Chongqing 400716, Peoples R China Southwest Univ, Key Lab Luminescent & Real Time Analyt Chem, Minist Educ, Coll Chem & Chem Engn, Chongqing 400715, Peoples R China

Zheng, Lin Ling
论文数: 0 引用数: 0
h-index: 0
机构:
Southwest Univ, Key Lab Luminescent & Real Time Analyt Chem, Minist Educ, Coll Chem & Chem Engn, Chongqing 400715, Peoples R China Southwest Univ, Key Lab Luminescent & Real Time Analyt Chem, Minist Educ, Coll Chem & Chem Engn, Chongqing 400715, Peoples R China

Huang, Cheng Zhi
论文数: 0 引用数: 0
h-index: 0
机构:
Southwest Univ, Key Lab Luminescent & Real Time Analyt Chem, Minist Educ, Coll Chem & Chem Engn, Chongqing 400715, Peoples R China
Southwest Univ, Coll Pharmaceut Sci, Chongqing 400716, Peoples R China Southwest Univ, Key Lab Luminescent & Real Time Analyt Chem, Minist Educ, Coll Chem & Chem Engn, Chongqing 400715, Peoples R China
[52]
Myricetin alleviated hepatic steatosis by acting on microRNA-146b/thyroid hormone receptor b pathway in high-fat diet fed C57BL/6J mice
[J].
Xia, Shu-Fang
;
Qiu, Yu-Yu
;
Chen, Li-Mei
;
Jiang, Yu-Yu
;
Huang, Wei
;
Xie, Zhen-Xing
;
Tang, Xue
;
Sun, Jin
.
FOOD & FUNCTION,
2019, 10 (03)
:1465-1477

Xia, Shu-Fang
论文数: 0 引用数: 0
h-index: 0
机构:
Jiangnan Univ, Wuxi Sch Med, Wuxi, Peoples R China Jiangnan Univ, Wuxi Sch Med, Wuxi, Peoples R China

Qiu, Yu-Yu
论文数: 0 引用数: 0
h-index: 0
机构:
Jiangnan Univ, Wuxi Sch Med, Wuxi, Peoples R China Jiangnan Univ, Wuxi Sch Med, Wuxi, Peoples R China

Chen, Li-Mei
论文数: 0 引用数: 0
h-index: 0
机构:
Jiangnan Univ, Wuxi Sch Med, Wuxi, Peoples R China Jiangnan Univ, Wuxi Sch Med, Wuxi, Peoples R China

Jiang, Yu-Yu
论文数: 0 引用数: 0
h-index: 0
机构:
Jiangnan Univ, Wuxi Sch Med, Wuxi, Peoples R China Jiangnan Univ, Wuxi Sch Med, Wuxi, Peoples R China

Huang, Wei
论文数: 0 引用数: 0
h-index: 0
机构:
Jiangnan Univ, Wuxi Sch Med, Wuxi, Peoples R China Jiangnan Univ, Wuxi Sch Med, Wuxi, Peoples R China

Xie, Zhen-Xing
论文数: 0 引用数: 0
h-index: 0
机构:
Henan Univ, Sch Basic Med, Kaifeng, Peoples R China Jiangnan Univ, Wuxi Sch Med, Wuxi, Peoples R China

Tang, Xue
论文数: 0 引用数: 0
h-index: 0
机构:
Jiangnan Univ, Sch Food Sci & Technol, State Key Lab Food Sci & Technol, Wuxi, Peoples R China Jiangnan Univ, Wuxi Sch Med, Wuxi, Peoples R China

Sun, Jin
论文数: 0 引用数: 0
h-index: 0
机构:
Jiangnan Univ, Sch Food Sci & Technol, State Key Lab Food Sci & Technol, Wuxi, Peoples R China Jiangnan Univ, Wuxi Sch Med, Wuxi, Peoples R China
[53]
Direct electron transfer of horseradish peroxidase on a functional nanocomplex modified glassy carbon electrode
[J].
Xiao, Bao-Lin
;
Hong, Jun
;
Gao, Yun-Fei
;
Yang, Tian
;
Moosavi-Movahedi, Ali Akbar
;
Ghourchian, Hedayatollah
.
BIO-MEDICAL MATERIALS AND ENGINEERING,
2014, 24 (01)
:1079-1084

Xiao, Bao-Lin
论文数: 0 引用数: 0
h-index: 0
机构:
Henan Univ, Sch Life Sci, Kaifeng 475000, Henan, Peoples R China Henan Univ, Sch Life Sci, Kaifeng 475000, Henan, Peoples R China

Hong, Jun
论文数: 0 引用数: 0
h-index: 0
机构:
Henan Univ, Sch Life Sci, Kaifeng 475000, Henan, Peoples R China Henan Univ, Sch Life Sci, Kaifeng 475000, Henan, Peoples R China

Gao, Yun-Fei
论文数: 0 引用数: 0
h-index: 0
机构:
Henan Univ, Sch Life Sci, Kaifeng 475000, Henan, Peoples R China Henan Univ, Sch Life Sci, Kaifeng 475000, Henan, Peoples R China

Yang, Tian
论文数: 0 引用数: 0
h-index: 0
机构:
Henan Univ, Sch Life Sci, Kaifeng 475000, Henan, Peoples R China Henan Univ, Sch Life Sci, Kaifeng 475000, Henan, Peoples R China

论文数: 引用数:
h-index:
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论文数: 引用数:
h-index:
机构:
[54]
A sensitive and reliable rutin electrochemical sensor based on palladium phthalocyanine-MWCNTs-Nafion nanocomposite
[J].
Xing, Ruimin
;
Yang, Haitang
;
Li, Shengnan
;
Yang, Jinghe
;
Zhao, Xiaoyu
;
Wang, Qinglong
;
Liu, Shanhu
;
Liu, Xiuhua
.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY,
2017, 21 (05)
:1219-1228

Xing, Ruimin
论文数: 0 引用数: 0
h-index: 0
机构:
Henan Univ, Inst Mol & Crystal Engn, Coll Chem & Chem Engn, Henan Key Lab Polyoxometalate Chem, Kaifeng, Peoples R China
Henan Univ, Inst Environm & Analyt Sci, Coll Chem & Chem Engn, Kaifeng 475004, Henan, Peoples R China Henan Univ, Inst Mol & Crystal Engn, Coll Chem & Chem Engn, Henan Key Lab Polyoxometalate Chem, Kaifeng, Peoples R China

Yang, Haitang
论文数: 0 引用数: 0
h-index: 0
机构:
Henan Univ, Inst Environm & Analyt Sci, Coll Chem & Chem Engn, Kaifeng 475004, Henan, Peoples R China Henan Univ, Inst Mol & Crystal Engn, Coll Chem & Chem Engn, Henan Key Lab Polyoxometalate Chem, Kaifeng, Peoples R China

Li, Shengnan
论文数: 0 引用数: 0
h-index: 0
机构:
Henan Univ, Inst Environm & Analyt Sci, Coll Chem & Chem Engn, Kaifeng 475004, Henan, Peoples R China Henan Univ, Inst Mol & Crystal Engn, Coll Chem & Chem Engn, Henan Key Lab Polyoxometalate Chem, Kaifeng, Peoples R China

Yang, Jinghe
论文数: 0 引用数: 0
h-index: 0
机构:
Henan Univ, Inst Mol & Crystal Engn, Coll Chem & Chem Engn, Henan Key Lab Polyoxometalate Chem, Kaifeng, Peoples R China Henan Univ, Inst Mol & Crystal Engn, Coll Chem & Chem Engn, Henan Key Lab Polyoxometalate Chem, Kaifeng, Peoples R China

Zhao, Xiaoyu
论文数: 0 引用数: 0
h-index: 0
机构:
Henan Univ, Inst Mol & Crystal Engn, Coll Chem & Chem Engn, Henan Key Lab Polyoxometalate Chem, Kaifeng, Peoples R China Henan Univ, Inst Mol & Crystal Engn, Coll Chem & Chem Engn, Henan Key Lab Polyoxometalate Chem, Kaifeng, Peoples R China

Wang, Qinglong
论文数: 0 引用数: 0
h-index: 0
机构:
Henan Univ, Inst Mol & Crystal Engn, Coll Chem & Chem Engn, Henan Key Lab Polyoxometalate Chem, Kaifeng, Peoples R China Henan Univ, Inst Mol & Crystal Engn, Coll Chem & Chem Engn, Henan Key Lab Polyoxometalate Chem, Kaifeng, Peoples R China

Liu, Shanhu
论文数: 0 引用数: 0
h-index: 0
机构:
Henan Univ, Inst Mol & Crystal Engn, Coll Chem & Chem Engn, Henan Key Lab Polyoxometalate Chem, Kaifeng, Peoples R China
Henan Univ, Inst Environm & Analyt Sci, Coll Chem & Chem Engn, Kaifeng 475004, Henan, Peoples R China Henan Univ, Inst Mol & Crystal Engn, Coll Chem & Chem Engn, Henan Key Lab Polyoxometalate Chem, Kaifeng, Peoples R China

Liu, Xiuhua
论文数: 0 引用数: 0
h-index: 0
机构:
Henan Univ, Inst Environm & Analyt Sci, Coll Chem & Chem Engn, Kaifeng 475004, Henan, Peoples R China Henan Univ, Inst Mol & Crystal Engn, Coll Chem & Chem Engn, Henan Key Lab Polyoxometalate Chem, Kaifeng, Peoples R China
[55]
Ordered mesoporous Co3O4 nanospheres / reduced graphene oxide composites for rutin detection
[J].
Zhang, Jiangjiang
;
Cui, Shiqiang
;
Ding, Yaping
;
Yang, Xinxin
;
Guo, Kai
;
Zhao, Jingtai
.
CERAMICS INTERNATIONAL,
2018, 44 (07)
:7858-7866

Zhang, Jiangjiang
论文数: 0 引用数: 0
h-index: 0
机构:
Shanghai Univ, Coll Sci, Sch Mat Sci & Engn, Shanghai 200444, Peoples R China Shanghai Univ, Coll Sci, Sch Mat Sci & Engn, Shanghai 200444, Peoples R China

Cui, Shiqiang
论文数: 0 引用数: 0
h-index: 0
机构:
Shenzhen Univ, Coll Optoelect Engn, Minist Educ & Guangdong Prov, Key Lab Optoelect Devices & Syst, Shenzhen 518060, Peoples R China Shanghai Univ, Coll Sci, Sch Mat Sci & Engn, Shanghai 200444, Peoples R China

Ding, Yaping
论文数: 0 引用数: 0
h-index: 0
机构:
Shanghai Univ, Coll Sci, Sch Mat Sci & Engn, Shanghai 200444, Peoples R China Shanghai Univ, Coll Sci, Sch Mat Sci & Engn, Shanghai 200444, Peoples R China

Yang, Xinxin
论文数: 0 引用数: 0
h-index: 0
机构:
Shanghai Univ, Coll Sci, Sch Mat Sci & Engn, Shanghai 200444, Peoples R China Shanghai Univ, Coll Sci, Sch Mat Sci & Engn, Shanghai 200444, Peoples R China

Guo, Kai
论文数: 0 引用数: 0
h-index: 0
机构:
Shanghai Univ, Coll Sci, Sch Mat Sci & Engn, Shanghai 200444, Peoples R China Shanghai Univ, Coll Sci, Sch Mat Sci & Engn, Shanghai 200444, Peoples R China

Zhao, Jingtai
论文数: 0 引用数: 0
h-index: 0
机构:
Shanghai Univ, Coll Sci, Sch Mat Sci & Engn, Shanghai 200444, Peoples R China
Shanghai Univ, State Key Lab Adv Special Steel, Shanghai 200444, Peoples R China Shanghai Univ, Coll Sci, Sch Mat Sci & Engn, Shanghai 200444, Peoples R China
[56]
Rapidly screening of α-glucosidase inhibitors from Dioscorea opposita Thunb. peel based on rGO@Fe3O4 nanocomposites microreactor
[J].
Zhang, Songsong
;
Qiu, Beibei
;
Zhu, Jinhua
;
Hu, Weiping
;
Ma, Fanyi
;
Khan, M. Z. H.
;
Liu, Xiuhua
.
JOURNAL OF ENZYME INHIBITION AND MEDICINAL CHEMISTRY,
2018, 33 (01)
:1335-1342

Zhang, Songsong
论文数: 0 引用数: 0
h-index: 0
机构:
Henan Univ, Coll Chem & Chem Engn, Kaifeng 475004, Peoples R China
Henan Univ, Key Lab Nat Med & Immune Engn Henan Prov, Kaifeng, Peoples R China Henan Univ, Coll Chem & Chem Engn, Kaifeng 475004, Peoples R China

Qiu, Beibei
论文数: 0 引用数: 0
h-index: 0
机构:
Henan Univ, Coll Chem & Chem Engn, Kaifeng 475004, Peoples R China
Henan Univ, Key Lab Nat Med & Immune Engn Henan Prov, Kaifeng, Peoples R China Henan Univ, Coll Chem & Chem Engn, Kaifeng 475004, Peoples R China

Zhu, Jinhua
论文数: 0 引用数: 0
h-index: 0
机构:
Henan Univ, Coll Chem & Chem Engn, Kaifeng 475004, Peoples R China
Henan Univ, Key Lab Nat Med & Immune Engn Henan Prov, Kaifeng, Peoples R China Henan Univ, Coll Chem & Chem Engn, Kaifeng 475004, Peoples R China

Hu, Weiping
论文数: 0 引用数: 0
h-index: 0
机构:
Henan Univ, Coll Chem & Chem Engn, Kaifeng 475004, Peoples R China
Henan Univ, Key Lab Nat Med & Immune Engn Henan Prov, Kaifeng, Peoples R China Henan Univ, Coll Chem & Chem Engn, Kaifeng 475004, Peoples R China

Ma, Fanyi
论文数: 0 引用数: 0
h-index: 0
机构:
Henan Univ, Coll Chem & Chem Engn, Kaifeng 475004, Peoples R China
Henan Univ, Key Lab Nat Med & Immune Engn Henan Prov, Kaifeng, Peoples R China Henan Univ, Coll Chem & Chem Engn, Kaifeng 475004, Peoples R China

Khan, M. Z. H.
论文数: 0 引用数: 0
h-index: 0
机构:
Henan Univ, Coll Chem & Chem Engn, Kaifeng 475004, Peoples R China
Henan Univ, Key Lab Nat Med & Immune Engn Henan Prov, Kaifeng, Peoples R China
Jessore Univ Sci & Technol, Dept Chem Engn, Jessore, Bangladesh Henan Univ, Coll Chem & Chem Engn, Kaifeng 475004, Peoples R China

Liu, Xiuhua
论文数: 0 引用数: 0
h-index: 0
机构:
Henan Univ, Coll Chem & Chem Engn, Kaifeng 475004, Peoples R China
Henan Univ, Key Lab Nat Med & Immune Engn Henan Prov, Kaifeng, Peoples R China Henan Univ, Coll Chem & Chem Engn, Kaifeng 475004, Peoples R China
[57]
A supersensitive sensor for rutin detection based on multi-walled carbon nanotubes and gold nanoparticles modified carbon paste electrodes
[J].
Zhou, Jing
;
Zhang, Kai
;
Liu, Jie
;
Song, Ge
;
Ye, Baoxian
.
ANALYTICAL METHODS,
2012, 4 (05)
:1350-1356

Zhou, Jing
论文数: 0 引用数: 0
h-index: 0
机构:
Zhengzhou Univ, Dept Chem, Zhengzhou 450052, Peoples R China Zhengzhou Univ, Dept Chem, Zhengzhou 450052, Peoples R China

Zhang, Kai
论文数: 0 引用数: 0
h-index: 0
机构:
Zhengzhou Univ, Dept Chem, Zhengzhou 450052, Peoples R China Zhengzhou Univ, Dept Chem, Zhengzhou 450052, Peoples R China

Liu, Jie
论文数: 0 引用数: 0
h-index: 0
机构:
Zhengzhou Univ, Dept Chem, Zhengzhou 450052, Peoples R China Zhengzhou Univ, Dept Chem, Zhengzhou 450052, Peoples R China

Song, Ge
论文数: 0 引用数: 0
h-index: 0
机构:
Zhengzhou Univ, Dept Chem, Zhengzhou 450052, Peoples R China Zhengzhou Univ, Dept Chem, Zhengzhou 450052, Peoples R China

Ye, Baoxian
论文数: 0 引用数: 0
h-index: 0
机构:
Zhengzhou Univ, Dept Chem, Zhengzhou 450052, Peoples R China Zhengzhou Univ, Dept Chem, Zhengzhou 450052, Peoples R China
[58]
An Electrochemical Sensor Based on Carbon Nano-Fragments and β-cyclodextrin Composite-Modified Glassy Carbon Electrode for the Determination of Rutin
[J].
Zhu, Xiaohua
;
Jiao, Qifang
;
Zuo, Xiaoxi
;
Xiao, Xin
;
Liang, Yong
;
Nan, Junmin
.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY,
2013, 160 (10)
:H699-H703

Zhu, Xiaohua
论文数: 0 引用数: 0
h-index: 0
机构:
S China Normal Univ, Sch Chem & Environm, Minist Educ, Key Lab Theoret Chem Environm, Guangzhou 510006, Guangdong, Peoples R China S China Normal Univ, Sch Chem & Environm, Minist Educ, Key Lab Theoret Chem Environm, Guangzhou 510006, Guangdong, Peoples R China

Jiao, Qifang
论文数: 0 引用数: 0
h-index: 0
机构:
S China Normal Univ, Sch Chem & Environm, Minist Educ, Key Lab Theoret Chem Environm, Guangzhou 510006, Guangdong, Peoples R China S China Normal Univ, Sch Chem & Environm, Minist Educ, Key Lab Theoret Chem Environm, Guangzhou 510006, Guangdong, Peoples R China

Zuo, Xiaoxi
论文数: 0 引用数: 0
h-index: 0
机构:
S China Normal Univ, Sch Chem & Environm, Minist Educ, Key Lab Theoret Chem Environm, Guangzhou 510006, Guangdong, Peoples R China S China Normal Univ, Sch Chem & Environm, Minist Educ, Key Lab Theoret Chem Environm, Guangzhou 510006, Guangdong, Peoples R China

Xiao, Xin
论文数: 0 引用数: 0
h-index: 0
机构:
S China Normal Univ, Sch Chem & Environm, Minist Educ, Key Lab Theoret Chem Environm, Guangzhou 510006, Guangdong, Peoples R China S China Normal Univ, Sch Chem & Environm, Minist Educ, Key Lab Theoret Chem Environm, Guangzhou 510006, Guangdong, Peoples R China

Liang, Yong
论文数: 0 引用数: 0
h-index: 0
机构:
S China Normal Univ, Sch Chem & Environm, Minist Educ, Key Lab Theoret Chem Environm, Guangzhou 510006, Guangdong, Peoples R China S China Normal Univ, Sch Chem & Environm, Minist Educ, Key Lab Theoret Chem Environm, Guangzhou 510006, Guangdong, Peoples R China

Nan, Junmin
论文数: 0 引用数: 0
h-index: 0
机构:
S China Normal Univ, Sch Chem & Environm, Minist Educ, Key Lab Theoret Chem Environm, Guangzhou 510006, Guangdong, Peoples R China S China Normal Univ, Sch Chem & Environm, Minist Educ, Key Lab Theoret Chem Environm, Guangzhou 510006, Guangdong, Peoples R China