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Enhanced activity of ZnS(111) by N/Cu co-doping:Accelerated degradation of organic pollutants under visible light

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Journal of Environmental Sciences 2023年第3期125卷 244-257页

作者： guofei jiang Benjie Zhu Junzhi Sun Fang Liu Yongqiang Wang Chaocheng Zhao College of Chemical Engineering China University of PetroleumQingdao 266580China State Key Laboratory of Petroleum Pollution Control Beijing 102206China State Key Laboratory of Heavy Oil Processing China University of PetroleumQingdao 266580China

High-efficiency photocatalysts are of great significance for the application of photocatalytic technology in water *** this study,N/Cu co-doped ZnS nanosphere photocatalys(N/Cu-ZnS) is synthesized by a hydrothermal method for the first *** doping,the tex ture of nanosphere becomes loose,the nanometer diameter is reduced,making the specific surface area of catalyst increased from 34.73 to 101.59 m^(2)/*** characterization results show that more ZnS (111) crystal planes are exposed by N/Cu co-doping;the calculations of density functional theory show that N/Cu co-doping can increase the catalytic activity of the ZnS (111) crystal plane,enhance the adsorption capacity of (111) crystal plane to O_(2)and promote the generation of·O_(2)-.The energy levels of the introduced impurities can be hybridized with the energy levels of S and Zn at the top of valence band and the bottom o conduction band,which makes the band gap narrower,thus enhancing the absorption o visible *** with pure ZnS,the degradation rates of 2,4-dichlorophenol (2,4-DCP and tetracycline (TC) by N/Cu-ZnS under visible light (>420 nm) are increased by 83.7 and51 times,*** this research,a promising photocatalyst for photocatalytic degra dation of organic pollutants in wastewater is provided.

关键词： Catalytic degradation of visible light N/Cu co-doping ZnS(111) 2,4-Dichlorophenol Tetracycline

Antibacterial and Corrosion Inhibition Properties of SA-ZnO@ODA-GO@PU Super-Hydrophobic Coating in Circulating Cooling Water System

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China Petroleum Processing & Petrochemical Technology 2022年第1期24卷 117-128页

作者： Liu Fang Kong Can Li Wei jiang guofei Wang Xueyao College of Chemical Engineering China University of PetroleumQingdao 266580 State Key Laboratory of Petroleum Pollution Control Beijing 102206

In order to solve the corrosion problem of circulating cooling water system,SA-ZnO@ODA-GO@PU super-hydrophobic coating was synthesized for pipeline *** hydrophobic modification,the contact angle(CA)of the coating was above 150°.The antibacterial ability of coating was essential for corrosion ***-ZnO@ODA-GO can seriously damage the cell structure,make the cell content outflow,increase the leakage rate of protein,and make the bacteria unable to reach logarithmic growth phase within 24 *** corrosion inhibition mechanism analysis of SA-ZnO@ODA-GO@PU coating indicated that the hydrophobic coating as a physical barrier can prevent the water molecules from entering the carbon steel and prevent the surface charge transfer.

关键词： SA-ZnO@ODA-GO@PU coating super-hydrophobic antibacterial corrosion inhibition

Corrosion Inhibition of the Bi-enzyme Doped Epoxy Resin for Q235 Carbon Steel in Circulating Cooling Water

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China Petroleum Processing & Petrochemical Technology 2021年第2期23卷 109-120页

作者： Liu Fang jiang guofei Zhao Xiaoxuan Li Wei Che Yangli College of Chemical Engineering China University of PetroleumQingdao 266580 State Key Laboratory of Petroleum Pollution Control Beijing 102206

Carboxyl-functionalized SBA-15(COOH/SBA-15)was prepared by a one-pot synthesis method and ***-SBA-15/LZM-LP,an immobilized bi-enzyme(lipase and lysozyme),was prepared using COOH/SBA-15 as a *** orthogonal experiments were used to optimize the immobilization conditions with the index of corrosion *** tests show that COOH-SBA-15/LZM-LP can significantly inhibit the corrosion of carbon steel in circulating cooling *** corrosion inhibition rate was higher than 93%when the amount of COOHSBA-15/LZM-LP was 0.2 g/*** inhibition mechanism was proposed and discussed from the perspective of carboxyl and ***,when COOH-SBA-15/LZM-LP was doped into epoxy resin,the corrosion resistance of epoxy coatings can be significantly improved,and the corrosion resistance only decreased by 0.23%after 720 h of soaking.

关键词： electrochemistry corrosion immobilized enzyme

Hydrophobic and Magnetic Reduced Graphene Oxide Nanocomposite for Emulsified Oil Removal

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China Petroleum Processing & Petrochemical Technology 2017年第3期19卷 48-58页

作者： Fan Fengtao Li Xufei Liu Fang jiang guofei Sui Linlin Zhao Chaocheng State Key Laboratory of Petroleum Pollution Control College of Chemical EngineeringChina University of Petroleum(East China)Qingdao 266580

Magnetic reduced graphene oxide(MRGO) nanocomposite was prepared by the chemical coprecipitation method and applied as adsorbent for removing emulsified oil from oily wastewater. SEM, TEM, XRD, FT-IR, VSM and other analytical methods were utilized to characterize the prepared MRGO. The adsorption performance of MRGO was evaluated under different initial adsorbate concentration, MRGO dosage, temperature, and pH value of the solution. The adsorption kinetics and isotherms were investigated. In addition, the MRGO repeatability was also tested. It was found that almost 65%of emulsified oil were removed by MRGO in the first 15 min. The MRGO adsorption capacity and efficiency for removal of adsorbate reached 335.85 mg/g and 92.52% within 60 min, respectively. The adsorption capacity reduced with an increasing MRGO dosage, while increased with the increase of emulsified oil concentration. The adsorption performance of MRGO in the alkaline environment was lower than that in the acidic environment. The adsorption data could well fit to the pseudosecondorder model. The Langmuir model could well describe the isotherm data. The MRGO adsorption capacity was still more than 236.1 mg/g at the sixth regeneration cycle.

关键词： magnetic reduced graphene oxide nanocomposites adsorption emulsified oil

Corrosion Inhibition by Co-Immobilized Lysozyme and Lipase in Circulating Cooling Water System

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China Petroleum Processing & Petrochemical Technology 2017年第2期19卷 21-32页

作者： Liu Fang Lü Yucui jiang guofei Chen Xiaorui Sun Juan Zhao Chaocheng State Key Laboratory of Petroleum Pollution Control Department of Environmental and Safety Engineering China University of Petroleum Qingdao 266580

The corrosion inhibition performance of co-immobilized lysozyme and lipase was investigated in a recirculating cooling water system. Four methods were carried out in co-immobilization, and the operating parameters were optimized by using the respond surface methodology(RSM). The corrosion inhibition performance of co-immobilized lipase and lysozyme was evaluated by weight loss measurements and electrochemical measurements. The results revealed that the optimal co-immobilization method should be the sequential immobilization of lysozyme and then lipase. The inhibition efficiency was 86.10% under the optimal co-immobilized conditions. Electrochemical data showed that co-immobilized lysozyme and lipase was a mixed-type inhibitor and the corrosion inhibition efficiency was 81%.

关键词： circulating cooling water co-immobilization lysozyme lipase corrosion inhibition

Combined Use of Co-immobilized Lysozyme and Lipase and Chemical Inhibitors in Circulating Cooling Water System

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China Petroleum Processing & Petrochemical Technology 2018年第4期20卷 82-90页

作者： jiang guofei Chen Xiaorui Lu Xin Liu Fang Wang Yongqiang Zhao Chaocheng Sun Juan College of Chemical Engineering China University of PetroleumQingdao 266580 State Key Laboratory of Petroleum Pollution Control Beijing 102206

In order to improve the stability and corrosion inhibition performance of bioenzyme, lipase and lsozyme were co-immobilized on the mesoporous molecular sieve MCM-41 by the adsorption method. Then the immobilized enzymes were combined with amino trimethylene phosphonic acid and polyaspartic acid to prevent corrosion caused by circulating cooling water. The weight-loss method and electrochemical techniques were used to evaluate the performance of composite inhibitors. The co-immobilized lysozyme and lipase achieved good inhibition effects. After they were combined with amino trimethylene phosphonic acid and polyaspartic acid, the corrosion inhibition properties were further improved. The inhibition efficiency was promoted to 94.4%. During the corrosion inhibition process, the immobilized enzymes played an important role. The addition of corrosion inhibitor could inhibit the anodic dissolution and cathodic hydrogen evolution process of carbon steel at the same time. The adsorption of co-immobilized lysozyme and lipase composite inhibitor on the steel surface was a joint action involving physical adsorption and chemical adsorption.

关键词： carbon steel electrochemical impedance spectroscopy potentiodynamic polarization co-immobilized lysozyme and lipase

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基于Q学习算法和BP神经网络的倒立摆控制

自动化学报 1998年第5期24卷 662-666页

作者：蒋国飞吴沧浦北京理工大学自动控制系

Ｑ学习是Ｗａｔｋｉｎｓ［１］提出的求解信息不完全马尔可夫决策问题的一种强化学习方法．将Ｑ学习算法和ＢＰ神经网络有效结合，实现了状态未离散化的倒立摆的无模型学习控制．仿真表明：该方法不仅能成功解决确定和随机倒立摆模型的... 详细信息

Ｑ学习是Ｗａｔｋｉｎｓ［１］提出的求解信息不完全马尔可夫决策问题的一种强化学习方法．将Ｑ学习算法和ＢＰ神经网络有效结合，实现了状态未离散化的倒立摆的无模型学习控制．仿真表明：该方法不仅能成功解决确定和随机倒立摆模型的平衡控制，而且和Ａｎｄｅｒｓｏｎ［２］的ＡＨＣ（ＡｄａｐｔｉｖｅＨｅｕｒｉｓｔｉｃＣｒｉｔｉｃ）等方法相比，具有更好的学习效果．

关键词： Q学习 BP网络学习控制倒立摆系统

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Q学习算法在库存控制中的应用

自动化学报 1999年第2期25卷 236-241页

作者：蒋国飞吴沧浦北京理工大学自动控制系

Ｑ学习算法是Ｗａｔｋｉｎｓ提出的求解信息不完全马尔可夫决策问题的一种强化学习方法．这里提出了一种新的探索策略，并将该策略和Ｑ学习算法有效结合来求解一类典型的有连续状态和决策空间的库存控制问题．仿真表明，该方法所求解的... 详细信息

Ｑ学习算法是Ｗａｔｋｉｎｓ提出的求解信息不完全马尔可夫决策问题的一种强化学习方法．这里提出了一种新的探索策略，并将该策略和Ｑ学习算法有效结合来求解一类典型的有连续状态和决策空间的库存控制问题．仿真表明，该方法所求解的控制策略和用值迭代法在模型已知的情况下所求得的最优策略非常逼近，从而证实了Ｑ学习算法在一些系统模型未知的工程控制问题中的应用潜力．

关键词：马尔可夫决策库存控制运筹学 Q学习算法

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Q学习算法中网格离散化方法的收敛性分析

控制理论与应用 1999年第2期16卷 194-198页

作者：蒋国飞高慧琪吴沧浦北京理工大学自动控制系北京100081

Q学习算法是Watkins[1] 提出的求解信息不完全马尔可夫决策问题的一种强化学习方法 .要用Q学习算法来求解有连续状态和决策空间的随机最优控制问题 ,则需要先离散化问题的状态和决策空间 .在本文中 ,我们证明了在满足一定的Lipschitz连... 详细信息

Q学习算法是Watkins[1] 提出的求解信息不完全马尔可夫决策问题的一种强化学习方法 .要用Q学习算法来求解有连续状态和决策空间的随机最优控制问题 ,则需要先离散化问题的状态和决策空间 .在本文中 ,我们证明了在满足一定的Lipschitz连续性和有关集合为紧集的条件下 ,随着网格密度的增加 ,空间离散化后Q学习算法求得的最优解依概率

关键词： Q学习算法网格离散化收敛性马尔可夫决策