Graphitic carbon nitride(g-C_(3)N_(4))has been extensively doped with alkali metals to enlarge photocatalytic output,in which cesium(Cs)doping is predicted to be the most efficient.Nevertheless,the sluggish diffusion ...Graphitic carbon nitride(g-C_(3)N_(4))has been extensively doped with alkali metals to enlarge photocatalytic output,in which cesium(Cs)doping is predicted to be the most efficient.Nevertheless,the sluggish diffusion and doping kinetics of precursors with high melting points,along with imprecise regulation,have raised the debate on whether Cs doping could make sense.For this matter,we attempt to confirm the positive effects of Cs doping on multifunctional photocatalysis by first using cesium acetate with the character of easy manipulation.The optimized Csdoped g-C_(3)N_(4)(CCN)shows a 41.6-fold increase in visible-light-driven hydrogen evolution reaction(HER)compared to pure g-C_(3)N_(4) and impressive degradation capability,especially with 77%refractory tetracycline and almost 100%rhodamine B degradedwithin an hour.The penetration ofCs+is demonstrated to be a mode of interlayer doping,and Cs–N bonds(especially with sp^(2) pyridine N in C═N–C),along with robust chemical interaction and electron exchange,are fabricated.This atomic configuration triggers the broadened spectral response,the improved charge migration,and the activated photocatalytic capacity.Furthermore,we evaluate the CCN/cadmium sulfide hybrid as a Z-scheme configuration,promoting the visible HER yield to 9.02 mmol g^(−1) h^(−1),which is the highest ever reported among all CCN systems.This work adds to the rapidly expanding field of manipulation strategies and supports further development of mediating served for photocatalysis.展开更多
在Cesium中展示大体量集中的三维模型需要进行渲染性能优化。Cesium原生方法效果不稳定,同时会降低渲染效果。为了尽可能避免该问题,提出相机状态变化期间高性能渲染机制,在相机状态变化期间停止加载图元,且仅在此期间采用会降低渲染效...在Cesium中展示大体量集中的三维模型需要进行渲染性能优化。Cesium原生方法效果不稳定,同时会降低渲染效果。为了尽可能避免该问题,提出相机状态变化期间高性能渲染机制,在相机状态变化期间停止加载图元,且仅在此期间采用会降低渲染效果但可提升性能的参数设置与算法,保证模型加载期间的渲染效果。同时提出基于堆的三维瓦片绘制命令限制方法,通过该方法可直接限制绘制命令数量,降低GPU计算量。实验证明,相机状态变化期间高性能渲染机制可行。在该机制中提升最大屏幕空间误差(max screen space error,MSSE)以及限制绘制命令对提升渲染性能的效果均显著优于降低分辨率比例(resolution scale,RS)。而限制绘制命令对渲染性能提升的稳定性优于提升MSSE。展开更多
基金supported primarily by the National Natural Science Foundation of China(Contract No.21975245,51972300,62274155,and U20A20206)the National Key Research and Development Program of China(Grant No.2018YFE0204000)+2 种基金the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB43000000)the National Natural Science Foundation of China under Grant No.62175231.Prof.Kong Liu appreciates the support from the Youth Innovation Promotion Association,the Chinese Academy of Sciences(No.2020114)the Beijing Nova Program(No.2020117).
文摘Graphitic carbon nitride(g-C_(3)N_(4))has been extensively doped with alkali metals to enlarge photocatalytic output,in which cesium(Cs)doping is predicted to be the most efficient.Nevertheless,the sluggish diffusion and doping kinetics of precursors with high melting points,along with imprecise regulation,have raised the debate on whether Cs doping could make sense.For this matter,we attempt to confirm the positive effects of Cs doping on multifunctional photocatalysis by first using cesium acetate with the character of easy manipulation.The optimized Csdoped g-C_(3)N_(4)(CCN)shows a 41.6-fold increase in visible-light-driven hydrogen evolution reaction(HER)compared to pure g-C_(3)N_(4) and impressive degradation capability,especially with 77%refractory tetracycline and almost 100%rhodamine B degradedwithin an hour.The penetration ofCs+is demonstrated to be a mode of interlayer doping,and Cs–N bonds(especially with sp^(2) pyridine N in C═N–C),along with robust chemical interaction and electron exchange,are fabricated.This atomic configuration triggers the broadened spectral response,the improved charge migration,and the activated photocatalytic capacity.Furthermore,we evaluate the CCN/cadmium sulfide hybrid as a Z-scheme configuration,promoting the visible HER yield to 9.02 mmol g^(−1) h^(−1),which is the highest ever reported among all CCN systems.This work adds to the rapidly expanding field of manipulation strategies and supports further development of mediating served for photocatalysis.
文摘在Cesium中展示大体量集中的三维模型需要进行渲染性能优化。Cesium原生方法效果不稳定,同时会降低渲染效果。为了尽可能避免该问题,提出相机状态变化期间高性能渲染机制,在相机状态变化期间停止加载图元,且仅在此期间采用会降低渲染效果但可提升性能的参数设置与算法,保证模型加载期间的渲染效果。同时提出基于堆的三维瓦片绘制命令限制方法,通过该方法可直接限制绘制命令数量,降低GPU计算量。实验证明,相机状态变化期间高性能渲染机制可行。在该机制中提升最大屏幕空间误差(max screen space error,MSSE)以及限制绘制命令对提升渲染性能的效果均显著优于降低分辨率比例(resolution scale,RS)。而限制绘制命令对渲染性能提升的稳定性优于提升MSSE。
