Efficient interfacial charge transfer and robust interfacial interactions are crucial for achieving the superior spatial separation of carriers and developing efficient heterojunction photocatalysts.Herein,BiOBr/AgBr ...Efficient interfacial charge transfer and robust interfacial interactions are crucial for achieving the superior spatial separation of carriers and developing efficient heterojunction photocatalysts.Herein,BiOBr/AgBr S-scheme heterojunctions are synthesized via the co-sharing of Br atoms using an ion-exchange approach,which involves the in-situ growth of AgBr nanoparticles on the surfaces of BiOBr nanosheets.It is revealed that successful construction of a high-quality interface with strong interactions via Br atom bridge between BiOBr and AgBr,which provided a rapid migration channel for charge carriers.In addition,in-situ XPS,Kelvin probe force microscopy,and electron spin resonance evaluations confirmed the establishment of an S-scheme charge-transfer pathway in this tightly contacted heterojunction,which could efficiently prevent the recombination of photogenerated carriers while retaining carriers with a high redox capacity.Finally,the photocatalytic test confirmed that the BiOBr/AgBr heterojunction showed excellent photocatalytic performance and wide applicability thanks to the construction of high quality heterojunction.Overall,this work highlights the importance of rational designing of heterogeneous interfaces at the atomic level in photocatalysis,and contributes to rationally design BiOBr-based S-scheme heterojunctions photocatalytic materials with high quality atomic cosharing interfaces.展开更多
Millimeter-wave(mmWave)radar communication has emerged as an important technique for future wireless systems.However,the interference between the radar signal and communication data is the main issue that should be co...Millimeter-wave(mmWave)radar communication has emerged as an important technique for future wireless systems.However,the interference between the radar signal and communication data is the main issue that should be considered for the joint radar communication system.In this paper,a co-sharing waveform(CSW)is proposed to achieve communication and radar sensing simultaneously.To eliminate the co-interference between the communication and sensing signal,signal splitting and processing methods for communication data demodulation and radar signal processing are given respectively.Simulation results show that the bit error rate(BER)of CSW is close to that of the pure communication waveform.Moreover,the proposed CSW can achieve better performance than the existing waveforms in terms of range and velocity estimation.展开更多
基金supported by the National Natural Science Foundation of China (No. 12204207)the National Natural Science Foundation of China-Yunnan Joint Fund (No. U2102215)+1 种基金the National Natural Science Foundation of High and Foreign Experts Introduction Plan (No. G2022039008L)Yunnan XingDian Youth Talent Support Program (No. XDYC-QNRC-2022-0591)。
文摘Efficient interfacial charge transfer and robust interfacial interactions are crucial for achieving the superior spatial separation of carriers and developing efficient heterojunction photocatalysts.Herein,BiOBr/AgBr S-scheme heterojunctions are synthesized via the co-sharing of Br atoms using an ion-exchange approach,which involves the in-situ growth of AgBr nanoparticles on the surfaces of BiOBr nanosheets.It is revealed that successful construction of a high-quality interface with strong interactions via Br atom bridge between BiOBr and AgBr,which provided a rapid migration channel for charge carriers.In addition,in-situ XPS,Kelvin probe force microscopy,and electron spin resonance evaluations confirmed the establishment of an S-scheme charge-transfer pathway in this tightly contacted heterojunction,which could efficiently prevent the recombination of photogenerated carriers while retaining carriers with a high redox capacity.Finally,the photocatalytic test confirmed that the BiOBr/AgBr heterojunction showed excellent photocatalytic performance and wide applicability thanks to the construction of high quality heterojunction.Overall,this work highlights the importance of rational designing of heterogeneous interfaces at the atomic level in photocatalysis,and contributes to rationally design BiOBr-based S-scheme heterojunctions photocatalytic materials with high quality atomic cosharing interfaces.
基金supported by the National Natural Science Foundation of China(No.62171052 and No.61971054)the Fundamental Research Funds for the Central Universities(No.24820232023YQTD01).
文摘Millimeter-wave(mmWave)radar communication has emerged as an important technique for future wireless systems.However,the interference between the radar signal and communication data is the main issue that should be considered for the joint radar communication system.In this paper,a co-sharing waveform(CSW)is proposed to achieve communication and radar sensing simultaneously.To eliminate the co-interference between the communication and sensing signal,signal splitting and processing methods for communication data demodulation and radar signal processing are given respectively.Simulation results show that the bit error rate(BER)of CSW is close to that of the pure communication waveform.Moreover,the proposed CSW can achieve better performance than the existing waveforms in terms of range and velocity estimation.
