Solar-driven desalination is a promising way to alleviate the freshwater shortage,while is facing challenges posed by low evaporation rates and severe salt accumulation.Herein,a high-performance twodimensional(2D) sol...Solar-driven desalination is a promising way to alleviate the freshwater shortage,while is facing challenges posed by low evaporation rates and severe salt accumulation.Herein,a high-performance twodimensional(2D) solar absorber with Co_(3)O_(4) nanoneedle arrays(Co_(3)O_(4)-NN) grown on the surface of reduced graphene oxide-coated pyrolyzed silk cloth(Co_(3)O_(4)-NN/rGO/PSC) was prepared,and a salt-free evaporator system was assembled based on the composite material and siphonage-the flowing water delivery.It is revealed that the evaporation enthalpy of water can be reduced over the 2D solar absorber grown with Co_(3)O_(4)-NN_T enabling an evaporation rate of up to 2.35 kg m^(-2) h^(-1) in DI water under one solar irradiation.The desalination process can be carried out continuously even with salt concentration up to 20 wt%,due to the timely removal of concentrated brine from the interface with the assistance of directed flowing water.Moreover,the 2D structure and the flowing water also provide an opportunity to convert waste solar heat into electricity in the evaporator based on the seebeck effect,ensuring simultaneous freshwater production and power generation.It is believed that this work provides insights into designing hybrid systems with high evaporation rate,salt resistance,and electricity generation.展开更多
Accelerating green innovation is crucial for achieving high-quality development in China.Despite this importance,empirical evidence on the harmonization techniques in the context of carbon-trading policies has been re...Accelerating green innovation is crucial for achieving high-quality development in China.Despite this importance,empirical evidence on the harmonization techniques in the context of carbon-trading policies has been remarkably thin.To address this gap,we employed the difference-in-difference(DID)and spatial difference-in-difference(S-DID)models using panel data from 2007 to 2017 for 30 Chinese provinces.Our findings reveal that the carbon-trading policy contributes significantly to the coordinated advancement of green technologies across Chinese provinces and exhibits a local siphoning effect.Specifically,the pilot areas of the policy have attracted talent from neighboring regions,which has fostered local cooperation and promoted coordinated innovation in green technologies within the region.展开更多
基金the financial support from the National Natural Science Foundation of China (Grant No. 52172038, 22179017)National Key Research and Development Program of China (Nos. 2022YFB4101600, 2022YFB4101601)。
文摘Solar-driven desalination is a promising way to alleviate the freshwater shortage,while is facing challenges posed by low evaporation rates and severe salt accumulation.Herein,a high-performance twodimensional(2D) solar absorber with Co_(3)O_(4) nanoneedle arrays(Co_(3)O_(4)-NN) grown on the surface of reduced graphene oxide-coated pyrolyzed silk cloth(Co_(3)O_(4)-NN/rGO/PSC) was prepared,and a salt-free evaporator system was assembled based on the composite material and siphonage-the flowing water delivery.It is revealed that the evaporation enthalpy of water can be reduced over the 2D solar absorber grown with Co_(3)O_(4)-NN_T enabling an evaporation rate of up to 2.35 kg m^(-2) h^(-1) in DI water under one solar irradiation.The desalination process can be carried out continuously even with salt concentration up to 20 wt%,due to the timely removal of concentrated brine from the interface with the assistance of directed flowing water.Moreover,the 2D structure and the flowing water also provide an opportunity to convert waste solar heat into electricity in the evaporator based on the seebeck effect,ensuring simultaneous freshwater production and power generation.It is believed that this work provides insights into designing hybrid systems with high evaporation rate,salt resistance,and electricity generation.
基金National Social Science Foundation of China(Grant No.:23BJL108).
文摘Accelerating green innovation is crucial for achieving high-quality development in China.Despite this importance,empirical evidence on the harmonization techniques in the context of carbon-trading policies has been remarkably thin.To address this gap,we employed the difference-in-difference(DID)and spatial difference-in-difference(S-DID)models using panel data from 2007 to 2017 for 30 Chinese provinces.Our findings reveal that the carbon-trading policy contributes significantly to the coordinated advancement of green technologies across Chinese provinces and exhibits a local siphoning effect.Specifically,the pilot areas of the policy have attracted talent from neighboring regions,which has fostered local cooperation and promoted coordinated innovation in green technologies within the region.
