Home

Citation: Cai Shengmin, Lu Tan, Zhou Muoyie. THE INVESTIGATION ON INVERSION OF n-TYPE TO p-TYPE PHOTORESPONSES OF MAGNESIUM-DOPED IRON OXIDE ELECTRODE[J]. Acta Physico-Chimica Sinica, ;1987, 3(01): 1-3. doi: 10.3866/PKU.WHXB19870101 shu

THE INVESTIGATION ON INVERSION OF n-TYPE TO p-TYPE PHOTORESPONSES OF MAGNESIUM-DOPED IRON OXIDE ELECTRODE

1.
Department of Chemistry Peking University
Department of Chemistry Xiamen University

Received Date: 24 May 1986
Available Online: 15 February 1987

Electrodes were prepared with heating commercial pure iron chips buried in M powder and showe dboth n-and p-type photoresponses.The photoresponses were so weak that in fact they were totally buried inthe noise.Hence asignal averager was used. After 1000 cycles'summation the signal to noise ratio was greatly improved and we obtained a wave form series showing the conversion of n-type, p-type photoresponses for the first time.
Fig.1(a): E=0.261V. The absolute peak-to-peak photovoltagevalue (ΔV_(ph)) equals 13.4 mV and shows a typical n-type photoresponse. (b); E=-0.04 V, ΔV_(ph)=1.24 mV, still an -n-type response, but when light is chopped off, the electrode potential reaches its stable value much faster than in (a). (c): When E=-0.076 V, which is only 0.036 V more negative than in (b), in the latter 85% part of illuminating period, electrode potential tends to increase, demonstrating some p-type character. (d): As E=-0.09 V, the magnitude of p-type response almost equals that of n-type. (e): As E=-0.12 V, the main response belongs to p-type, and ΔV_(ph) is only 0.634 mV. This electrode potential is much more positive than the flat band potential of the undoped iron oxide electrode (E_(fb) is about -0.5 V). (f): E=-0.17 V. There is still a small n-type response at the beginning of every illuminating period, and the whole curve appears to be p-type responnse. (g): E=-0.36 V. Typical p-type response appears. ΔV_(ph)=2.05 mV. (h) and (i): E=-0.40 V and -0.45 V. ΔV_(ph) drop to 1.55 mV and 1.05 mV respectively. the above data were reproducible, no retardation of photoresponse was observed when potential was changed.
An XPS surface analysis was performed thereafter on the same electrode. A peak of Mg1S at 1305 eV(BE) is apparent. Huge amount of Mg exists on the surface layer. the relative atomic concentration (s compared with Fe) reaches 15-20 AT%. After Ar~+ etching, the amount of Mg decreases. Fig.2 is the result after 9 minutes′ Ar~+ etching. A possible explanation of these experimental facts based on model of energy band of semiconductors was given.
1. [1]
  Xiaomei Ning , Liang Zhan , Xiaosong Zhou , Jin Luo , Xunfu Zhou , Cuifen Luo . Preparation and Electro-Oxidation Performance of PtBi Supported on Carbon Cloth: A Recommended Comprehensive Chemical Experiment. University Chemistry, 2024, 39(11): 217-224. doi: 10.3866/PKU.DXHX202401085
2. [2]
  Tong Zhou , Jun Li , Zitian Wen , Yitian Chen , Hailing Li , Zhonghong Gao , Wenyun Wang , Fang Liu , Qing Feng , Zhen Li , Jinyi Yang , Min Liu , Wei Qi . Experiment Improvement of “Redox Reaction and Electrode Potential” Based on the New Medical Concept. University Chemistry, 2024, 39(8): 276-281. doi: 10.3866/PKU.DXHX202401005
3. [3]
  Ji-Quan Liu , Huilin Guo , Ying Yang , Xiaohui Guo . Calculation and Discussion of Electrode Potentials in Redox Reactions of Water. University Chemistry, 2024, 39(8): 351-358. doi: 10.3866/PKU.DXHX202401031
4. [4]
  Ping Song , Nan Zhang , Jie Wang , Rui Yan , Zhiqiang Wang , Yingxue Jin . Experimental Teaching Design on Synthesis and Antitumor Activity Study of Cu-Pyropheophorbide-a Methyl Ester. University Chemistry, 2024, 39(6): 278-286. doi: 10.3866/PKU.DXHX202310087
5. [5]
  Xin Zhou , Zhi Zhang , Yun Yang , Shuijin Yang . A Study on the Enhancement of Photocatalytic Performance in C/Bi/Bi₂MoO₆ Composites by Ferroelectric Polarization: A Recommended Comprehensive Chemical Experiment. University Chemistry, 2024, 39(4): 296-304. doi: 10.3866/PKU.DXHX202310008
6. [6]
  Yuanyin Cui , Jinfeng Zhang , Hailiang Chu , Lixian Sun , Kai Dai . Rational Design of Bismuth Based Photocatalysts for Solar Energy Conversion. Acta Physico-Chimica Sinica, 2024, 40(12): 2405016-. doi: 10.3866/PKU.WHXB202405016
7. [7]
  Ronghao Zhao , Yifan Liang , Mengyao Shi , Rongxiu Zhu , Dongju Zhang . Investigation into the Mechanism and Migratory Aptitude of Typical Pinacol Rearrangement Reactions: A Research-Oriented Computational Chemistry Experiment. University Chemistry, 2024, 39(4): 305-313. doi: 10.3866/PKU.DXHX202309101
8. [8]
  Sunting Xuan , Hang Shen , Xin Wang . Discussion on the Current Situation and Strategies for Academic Master’s Education in Chemistry. University Chemistry, 2024, 39(6): 37-41. doi: 10.3866/PKU.DXHX202401013
9. [9]
  Feiya Cao , Qixin Wang , Pu Li , Zhirong Xing , Ziyu Song , Heng Zhang , Zhibin Zhou , Wenfang Feng . Magnesium-Ion Conducting Electrolyte Based on Grignard Reaction: Synthesis and Properties. University Chemistry, 2024, 39(3): 359-368. doi: 10.3866/PKU.DXHX202308094
10. [10]
  Xiaosong PU , Hangkai WU , Taohong LI , Huijuan LI , Shouqing LIU , Yuanbo HUANG , Xuemei LI . Adsorption performance and removal mechanism of Cd(Ⅱ) in water by magnesium modified carbon foam. Chinese Journal of Inorganic Chemistry, 2024, 40(8): 1537-1548. doi: 10.11862/CJIC.20240030
11. [11]
  Fan Wu , Wenchang Tian , Jin Liu , Qiuting Zhang , YanHui Zhong , Zian Lin . Core-Shell Structured Covalent Organic Framework-Coated Silica Microspheres as Mixed-Mode Stationary Phase for High Performance Liquid Chromatography. University Chemistry, 2024, 39(11): 319-326. doi: 10.12461/PKU.DXHX202403031
12. [12]
  Di WU , Ruimeng SHI , Zhaoyang WANG , Yuehua SHI , Fan YANG , Leyong ZENG . Construction of pH/photothermal dual-responsive delivery nanosystem for combination therapy of drug-resistant bladder cancer cell. Chinese Journal of Inorganic Chemistry, 2024, 40(9): 1679-1688. doi: 10.11862/CJIC.20240135
13. [13]
  Jiaxin Su , Jiaqi Zhang , Shuming Chai , Yankun Wang , Sibo Wang , Yuanxing Fang . Optimizing Poly(heptazine imide) Photoanodes Using Binary Molten Salt Synthesis for Water Oxidation Reaction. Acta Physico-Chimica Sinica, 2024, 40(12): 2408012-. doi: 10.3866/PKU.WHXB202408012
14. [14]
  Baohua LÜ , Yuzhen LI . Anisotropic photoresponse of two-dimensional layered α-In₂Se₃(2H) ferroelectric materials. Chinese Journal of Inorganic Chemistry, 2024, 40(10): 1911-1918. doi: 10.11862/CJIC.20240105
15. [15]
  Xiaoxiao Huang , Zhi-Long He , Yangpeng Chen , Lei Li , Zhenyu Yang , Chunyang Zhai , Mingshan Zhu . Novel P-doping-tuned Pd nanoflowers/S,N-GQDs photo-electrocatalyst for high-efficient ethylene glycol oxidation. Chinese Chemical Letters, 2024, 35(6): 109271-. doi: 10.1016/j.cclet.2023.109271
16. [16]
  Kexin Dong , Chuqi Shen , Ruyu Yan , Yanping Liu , Chunqiang Zhuang , Shijie Li . Integration of Plasmonic Effect and S-Scheme Heterojunction into Ag/Ag₃PO₄/C₃N₅ Photocatalyst for Boosted Photocatalytic Levofloxacin Degradation. Acta Physico-Chimica Sinica, 2024, 40(10): 2310013-. doi: 10.3866/PKU.WHXB202310013
17. [17]
  Junli Liu . Practice and Exploration of Research-Oriented Classroom Teaching in the Integration of Science and Education: a Case Study on the Synthesis of Sub-Nanometer Metal Oxide Materials and Their Application in Battery Energy Storage. University Chemistry, 2024, 39(10): 249-254. doi: 10.12461/PKU.DXHX202404023
18. [18]
  Rong Tian , Yadi Yang , Naihao Lu . Comprehensive Experimental Design of Undergraduate Students Based on Interdisciplinarity: Study on the Effect of Quercetin on Chlorination Activity of Myeloperoxidase. University Chemistry, 2024, 39(8): 247-254. doi: 10.3866/PKU.DXHX202312064
19. [19]
  Zhenlin Zhou , Siyuan Chen , Yi Liu , Chengguo Hu , Faqiong Zhao . A New Program of Voltammetry Experiment Teaching Based on Laser-Scribed Graphene Electrode. University Chemistry, 2024, 39(2): 358-370. doi: 10.3866/PKU.DXHX202308049
20. [20]
  Meng Lin , Hanrui Chen , Congcong Xu . Preparation and Study of Photo-Enhanced Electrocatalytic Oxygen Evolution Performance of ZIF-67/Copper(I) Oxide Composite: A Recommended Comprehensive Physical Chemistry Experiment. University Chemistry, 2024, 39(4): 163-168. doi: 10.3866/PKU.DXHX202308117

Get Citation

PDF

XML

Metrics

PDF Downloads(1551)
Abstract views(2178)
HTML views(54)

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Address：Zhongguancun North First Street 2,100190 Beijing, PR China Tel: +86-010-82449177-888

DownLoad: Full-Size Img PowerPoint

Return