TiO2基光催化在环境污染治理领域的研究进展（英文版）

　　The past 40 years have seen the emergence worldwide of a growing desire to take positive actions to restore and protect our environment from the degrading effects of all forms of pollution. Since this pollution is a direct or indirect consequence of waste， the seemingly idealistic demand for zero discharge can be construed as an unrealistic demand for zero waste. However， as long as waste exists， we can only attempt to abate the subsequent pollution by converting it to a less noxious form. In recent years， the international environment community， especially in China， has been increasingly concerned about the stresses imposed on the natural environment by many chemical and energy-generating processes. As a result， the whole world is witnessing an accelerated development and implementation of new green technologies which are called to provide ecologically responsible solutions for the much needed supply of drinking water and clean air.

　　Qijin Geng， Ph.D， Associate Professor of College of Chemistry-Chemical & Environmental Engineering， Weifang Universit）r. The membership in Chemistry Association of China.Add： College of Chemistry and Chemical Engineering， Weifang University， Shandong Province， 261061， P. R. ChinaQijin Geng was born in China in December， 1969. He gained his bachelor degree from College of Textile Chemical Engineering in Qingdao University in 1992. The master degree of applied chemistry was obtained in Jinan University in 2004 and Ph.D degree of chemical engineering at Qingdao University of Science and Technology， Shandong Province， P. R. China in 2011. The speciality is photocatalytic decomposition of waste water and gaseous pollutants， building materials， nano-sized material preparation， and multi-phase fluidization reaction engineering.

Foreword
1 Progress of Photocatalysis Science and Technology
Introduction
1．1 A briefoverview of photocatalysis
1．2 Photocatalytic reactor design and application in air and waste water treatments
1．2．1 Photon transferlimitations and overcoming measurements
1．2．2 Mass transfer limitations and overcoming measurements
1．2．3 Other engineering problems in reactor design
1．3 Future prospects
2 Fundamentals of Photocatalysis
Introduction
2．1 Photocatalysismechanism
2．1．1 Reductive mechanism
2．1．2 Oxidativemechanism
2．1．3 Combined redox mechanism
2．2 Photoelectrochemicalbasis of photocatalysis
2．3 Time scales for primary processes
2．4 Trapping of electrons and holes
2．5 Factors affecting electron transfer efficiency
2．6 Oxidizing species at the Ti02 surface
2．6．1 Role of molecular oxygen
2．6．2 Effect of crystal face
2．7 Relation between interfacial electron transfer rate constants and driving force
2．8 Summary
3 Heterogeneous Photocatalytic Degradation of Waste Water Contairung Phenolic Compounds
Introduction
3．1 Fundamentals of photocatalysis of phenols
3．1．1 Basic mechanism
3．1．2 Performance of phenol， chlorophenol and nitrophenol in photocatalysis
3．1．3 Phenol and its intermediates formed and detected
3．1．4 Pathways of phenol photodegradation
3．1．5 Kinetic model for phenol photodeUadation
3．2 Review of photocatalytic oxidation of phenolic compounds
3．3 Influencing factors on photocatalytic oxidation of phenolic compounds
3．3．1 Substituted group of phenolic compounds
3．3．2 Structure property and composition of photocatalyst
3．3．3 Lightintensity and wavelength
3．3．4 Initialconcentration of phenolic compounds
3．3．5 Photocatalystloading
3．3．6 Medium pH value
3．3．7 Co-existing substances
3．3．8 Oxidants/electron acceptor added
3．3．9 Calcination temperature of photocatalyst
3．3．10 Dopant on photocatalyst
3．4 Conclusion and outlooks
4 Heterogeneous Photocatalytic Degradation of Waste Water Containing Dyes
Introduction
4．1 Introduction of dyes
4．2 Experimental techniques applied in photocatalytic degradation of dye
4．3 Mechanisms and pathways of photocatalysis
4．3．1 Basic mechanism
4．3．2 Possiblepathways
4．3．3 Interaction mechanism between dye molecule and inorganic ion
4．3．4 Basic models of photocatalyses and pathways
4．4 Operational factors influencing on the photocatalytic degradation of dyes
4．4．1 Dyeconcentration
4．4．2 Catalystamount
4．4 ，3 pH value
4．4．4 Oxidizing agent
4．4．5 Light intensity and irradiation time
4．4．6 Dissolved oxygen
4．4．7 Doped photocatalyst
4．4．8 Dopant content
4．4．9 Calcination temperature of photocatalyst
4．4．10 Dye structure
4．4．11 Molecular size of the dyes
4．4．12 Inorganic ions added
4．5 Conclusions and prospect
5 Heterogeneous Photocatalytlic Removal of lnorganic Ions From Waste Water
Introduction
5．1 Fundamentals of As photocatalytic remova
5．1．1 States of inorganic and organic arse
5．1．2 Basic mechanisms of arsenic remova
5．2 Review of photooxidation of As(Ⅲ) and organic arsenic
5．2．1 Initial works and recent research advances
5．2．2 Modified photocatalyst to enhance arsenic removal
5．3 Influencing factors for photocatalytic oxidation of As
5．3．1 Co-existing solutes
5．3．2 pH value
5．3．3 Photocatalyst size
……
6 Heterogeneous Photocatalytic Degradation of Gaseous Pollutants