首页|(Oxy)nitride heterojunction-strengthened separation of photogenerated carriers in g-CsN4 towards enhanced photocatalytic H2 evolution
(Oxy)nitride heterojunction-strengthened separation of photogenerated carriers in g-CsN4 towards enhanced photocatalytic H2 evolution
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The metal-free graphitic carbon nitride(g-C3N4)with a series of merits like low cost,favorable stability,and controllable two-dimensional graphite-like structure,has been extensively studied for photocatalytic H2 evolution.Composite engineering is regarded as one of effective strategies to adjust the kinetics of photogenerated carriers in g-C3N4 for elevating its photocatalytic performance.Herein,the composite system of g-C3N4 with oxynitride LaTiO2N was elaborately constructed for improving photocatalytic H2-evolution performance.With systematical characterizations,the partial cover of g-CsN4 nanosheets on LaTiO2N(LaTiO2N@g-C3N4)was verified and promoted the sufficient contact between g-C3N4 and LaTiO2N,accompanied by the formation of the(oxy)nitride heterojunction.Benefited by the well-matched band structures for g-CsN4 and LaTiO2N,the(oxy)nitride heterojunction strengthened the separation of photogenerated carriers and therefore enhanced the photocatalytic performance of g-C3N4.This work gives more insight in composite engineering on g-C3N4,and also provides feasible guidelines for designing g-C3NU-based photocatalysts towards improving photocatalytic performance.
International Research Center for Renewable Energy(IRCRE),State Key Laboratory of Multiphase Flow in Power Engineering(MFPE),Xi'an Jiaotong University(XJTU),28 West Xianning Road,Xi'an 710049,China
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