Structural Design Of Cellulosebased Triboelectric Nanogenerator And Its Application In The Environment

Using clean and sustainable random energy to solve the problem of pollution is an effective way to achieve sustainable development of energy.Since the invention of the triboelectric nanogenerator（TENG）,significant progress has been made in its application mechanism and self-powered system,making it a new way of collecting ambient random energy.Cellulose has excellent properties such as renewable,degradable,low cost,and good biocompatibility.It has great application potential in the field of TENG.However,the weak triboelectric polarity of cellulose materials limits its application.Therefore,it is an urgent scientific challenge to design a unique device to make cellulose-based TENGs have both stable electrical performance and good environmental applicability.In this work,a radial piston triboelectric nanogenerator（RP-TENG）reinforced cellulose fiber air filter（CFAF）was developed using cellulose nanofibrils as the triboelectric material to remove the Particulate Matter（PMx）.Compared with the others,the self-powered PMx removal system can not only convert the mechanical energy into electricity,but also pump the polluted air to the CFAF at the same time.The voltage of RP-TENG can reach 170 V.After charging,the removal efficiency of PM_2.5 was 83.78%,and the removal efficiency of PM₁₀ was 86.82%,which were 1.21 times and 1.27 times than uncharged ones,respectively.A crowned triboelectric nanogenerator（C-TENG）was developed for enhancing the photocatalytic antibiotic degradation efficiency.The C-TENG converts water wave energy into electricity,enhancing the separation efficiency of photogenerated electrons and holes.With the water wave acceleration is 5 m/s²,the removal efficiency of tetracycline is 95.89%within 80 min.An external electric field generates more superoxide radicals（·O₂^-）,hydroxyl radicals（·OH）,and holes（h⁺）,which play a very important role in improving the photocatalytic efficiency.This study not only provides a new and sustainable strategy for the field of cellulose nanofibril-based triboelectric nanogenerators to enhance the field of CFAF removal of PMx,but also provides an efficient,environmentally friendly and low-cost tetracycline degradation method for degrading antibiotic wastewater.The new approach broadens the application range of cellulose based triboelectric nanogenerators in the environmental field.