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Dramatic Enhancement of CO2 Photoreduction by Biodegradable Light‐Management Paper
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2018-02-19 , DOI: 10.1002/aenm.201703136 Yangang Wang 1, 2, 3 , Tian Li 2 , Yonggang Yao 2 , Xi Li 1 , Xia Bai 1 , Chaochuang Yin 3 , Nicholas Williams 2 , Shifei Kang 3 , Lifeng Cui 3 , Liangbing Hu 2
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2018-02-19 , DOI: 10.1002/aenm.201703136 Yangang Wang 1, 2, 3 , Tian Li 2 , Yonggang Yao 2 , Xi Li 1 , Xia Bai 1 , Chaochuang Yin 3 , Nicholas Williams 2 , Shifei Kang 3 , Lifeng Cui 3 , Liangbing Hu 2
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Photocatalytic reduction of CO2 with H2O vapor is gaining increased interest because it is a promising “green chemistry” route for the direct conversion of CO2 to value‐added chemicals driven by solar energy. To increase the efficiency of photocatalytic conversion, most efforts are made by exploring various photocatalysts while little effort on advanced light management. For the first time, it is demonstrated that bio‐degradable transparent paper with excellent light diffusivity can effectively enhance the light utilization of photocatalytic reactions when attached on the device surface, and thus greatly increase the conversion efficiency. As a proof‐of‐concept, a graphitic carbon nitride (g‐C3N4) photocatalyst with transparent paper attached, exhibited 1.5 times higher photocatalytic activity than bare g‐C3N4 in the reduction of CO2 under visible light irradiation. The improved catalytic performance can be ascribed to the (1) refractive index matching and (2) enhanced light absorption via prolonged light traveling path in transparent paper, which decreases the light reflection at surface and traps the absorbed light inside, leading to an increased light absorption at the active layer of the device. The transparent paper with a controllable light management behavior has an unprecedented potential for applications in photocatalysis as a general method for improved light utilization.
中文翻译：
可生物降解的光管理纸极大地增强了二氧化碳的光还原
用H 2 O蒸气光催化还原CO 2引起了越来越多的兴趣，因为这是将CO 2直接转化为太阳能驱动的增值化学品的有前途的“绿色化学”途径。为了提高光催化转化的效率，大多数努力是通过探索各种光催化剂来进行的，而很少进行高级光管理方面的努力。首次证明，具有良好光扩散性的可生物降解的透明纸附着在设备表面时可以有效地提高光催化反应的光利用率，从而大大提高转换效率。作为概念验证，使用石墨氮化碳（g‐C 3 N 4）附有透明纸的光催化剂，在可见光照射下还原CO 2的光催化活性比裸g‐C 3 N 4高1.5倍。改进的催化性能可以归因于（1）折射率匹配和（2）通过延长透明纸中的光传播路径来增强光吸收，这减少了表面上的光反射并将光吸收到内部，从而导致光的增加器件有源层的吸收。具有可控的光管理行为的透明纸具有作为光催化改善光利用率的通用方法的空前潜力。
更新日期：2018-02-19
中文翻译：
可生物降解的光管理纸极大地增强了二氧化碳的光还原
用H 2 O蒸气光催化还原CO 2引起了越来越多的兴趣，因为这是将CO 2直接转化为太阳能驱动的增值化学品的有前途的“绿色化学”途径。为了提高光催化转化的效率，大多数努力是通过探索各种光催化剂来进行的，而很少进行高级光管理方面的努力。首次证明，具有良好光扩散性的可生物降解的透明纸附着在设备表面时可以有效地提高光催化反应的光利用率，从而大大提高转换效率。作为概念验证，使用石墨氮化碳（g‐C 3 N 4）附有透明纸的光催化剂，在可见光照射下还原CO 2的光催化活性比裸g‐C 3 N 4高1.5倍。改进的催化性能可以归因于（1）折射率匹配和（2）通过延长透明纸中的光传播路径来增强光吸收，这减少了表面上的光反射并将光吸收到内部，从而导致光的增加器件有源层的吸收。具有可控的光管理行为的透明纸具有作为光催化改善光利用率的通用方法的空前潜力。
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