摘要：As one of the most appealing and attractive technologies, photocatalysis is widely used as a promising method to circumvent the environmental and energy problems. Due to its chemical stability and unique physicochemical, graphitic carbon nitride (g-C3N4) has become research hotspots in the community. However, g-C3N4 photocatalyst still suffers from many problems, resulting in unsatisfactory photocatalytic activity such as low specific surface area, high charge recombination and insufficient visible light utilization. Since 2009, g-C3N4-based heterostructures have attracted the attention of scientists worldwide for their greatly enhanced photocatalytic performance. Overall, this review summarizes the recent advances of g-C3N4-based nanocomposites modified with transition metal sulfide (TMS), including (1) preparation of pristine g-C3N4,(2) modification strategies of g-C3N4,(3) design principles of TMS-modified g-C3N4 heterostructured photocatalysts, and (4) applications in energy conversion. What is more, the characteristics and transfer mechanisms of each classification of the metal sulfide heterojunction system will be critically reviewed, spanning from the following categories:(1) Type I heterojunction,(2) Type II heterojunction,(3) p-n heterojunction,(4) Schottky junction and (5) Z-scheme heterojunction. Apart from that, the application of g-C3N4-based heterostructured photocatalysts in H2 evolution, CO2 reduction, N2 fixation and pollutant degradation will also be systematically presented. Last but not least, this review will conclude with invigorating perspectives, limitations and prospects for further advancing g-C3N4-based heterostructured photocatalysts toward practical benefits for a sustainable future.

摘要：Designing and fabricating highly efficient photocatalysts for water splitting is a promising strategy to address energy and environmental *** sulfide(CdS)has received significant interest as a photocatalyst for visible‐light‐induced hydrogen(H2)***,the severe photocorrosion,high overpotential,rapid charge recombination,and sluggish surface reaction kinetics drastically hinder its practical application in water ***,uniform zinc cadmium sulfide(Zn_(0.5)Cd_(0.5)S)nanoparticles were anchored on ultrathin Ni(OH)_(2)nanosheets via a facile solution‐phase approach to form an intimate two‐dimensional(2D)/zero‐dimensional(0D)*** visible light irradiation,the 7%Ni(OH)_(2)/Zn_(0.5)Cd_(0.5)S composite exhibited the highest H2 production rate of 6.87 mmol·h^(–1)·g^(–1)with an apparent quantum yield of 16.8%at 420 nm,which is almost 43 times higher than that of pristine Zn_(0.5)Cd_(0.5)S and considerably higher than that of the Pt/Zn_(0.5)Cd_(0.5)S *** high photoactivity of the 2D/0D Ni(OH)_(2)/Zn_(0.5)Cd_(0.5)S heterojunction can be ascribed to its unique and robust structure,wherein the ultrathin Ni(OH)_(2)nanosheets not only provide an excellent platform for the incorporation of Zn_(0.5)Cd_(0.5)S nanoparticles but also serve as an effective cocatalyst to promote photoinduced electron transfer and offer more active sites for photocatalytic H_(2) *** work paves the way toward the development of versatile,low‐cost,and highly efficient 2D/0D heterojunction photocatalysts for solar energy conversion.

摘要：利用差分吸收光谱法与输液监测系统的结合,研究水对光的吸收变化.事先将引起输液监测系统警报器响应的电压、电流设置在一定的范围内.将光分为2路,一路经过含有水的输液管;另一路经过未含有水的空输液管.利用光电转换器将经过输液管的光信号转换为电信号,传输到输液监测器中引发警报器响应.

摘要：根据目前水泥行业能耗偏高、污染严重的特点,针对水泥厂的能耗数据及排污数据设计出一套基于KingView的水泥厂节能减排监测及预警系统。系统通过采集水泥厂生产过程中的能耗数据和排污点排放量数据,并将数据通过串口传送至上位机。上位机采用KingView组态软件模拟水泥厂的各种工作情况,通过建立的4类数据库经数据处理,实时监测水泥厂各监测点排放量数据,当数值超出规定上限时,给出预警信号并提出合理优化建议。该系统设计可为监控值班人员提供可靠的能耗及排污量数据,同时为企业监测排污情况提供支撑。该系统的应用取得了良好的社会效益及经济效益,具有良好的应用前景。