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Biomass‐based photothermal materials for solar steam power generation have been a recent research hotspot. However, despite the many research advances that have been made, many challenges remain. For example, high temperature carbonization leads to the loss of hydrophilicity, the surface coating is easy to peel off, hydrothermal carbonization (HTC) does not guarantee the photothermal performance, and hydrothermal carbonization fluid (HTC‐F) is difficult to handle. Herein, a new material (H‐CS/MnO2) is prepared by co‐hydrothermal carbonization of cotton stalks (CS) and MnO2, and a stable and effective evaporation system is designed. While both ensure super hydrophilicity, the stable loading of MnO2 leads to an excellent photothermal performance. Experimental results show that H‐CS/MnO2 reaches 93.46% evaporation efficiency and the evaporation rate can reach 2.43 kg m−2 h−1 under 1 sun. Moreover, by means of recycling, not only the treatment of HTC solution is solved, but also the carbon dots are continuously enriched and exhibit certain photothermal effects during the recycling process. In addition, H‐CS/MnO2 exhibited excellent salt resistance and corrosion resistance. The obtained condensate heavy ion concentration removal rate reached more than 99.9%. Therefore, the H‐CS/MnO2 fabricated herein has the possibility of practical application in the future. [ABSTRACT FROM AUTHOR]

Objective: To understand the occupational stress and sub-health level of pharmaceutical marketers in Northeast China, and to analyze their influencing factors and the impact of occupational stress on sub-health., Methods: From October to December in 2016, we conducted a questionnaire survey about occupational stress and sub-health status of 698 women and 454 men pharmaceutical marketers aged from 22 to 58 years old in northeast China., Results: The rate of occupational stress was 86. 9%. The top 3 stressors with higher scores were the pressure brought about by the intensification of social competition(2. 90±1. 017), the higher standards of job assessment and the great efforts needed by individuals(2. 90±0. 959). The detection rate of sub-health was 82. 1%. There were statistically differences in the rate of sub-health detection among the groups of different genders(χ~2=4. 726, P=0. 030) and different business types(χ~2=7. 961, P=0. 047). There were statistically significant differences in the rate of different ages(χ~2=9. 534, P=0. 009), different marital status(χ~2=7. 010, P=0. 008), different working years(χ~2=18. 082, P<0. 001), and different stress groups(χ~2=152. 565, P<0. 001). Multivariate analysis showed that occupational stress is the key factor affecting sub-health. Mild stress(OR=0. 076, 95%CI 0. 040-0. 143)and moderate stress(OR=0. 348, 95%CI 0. 189-0. 641)are the protected factors of sub-health., Conclusion: The occupational stress rate and sub-health detection rate of medical marketers were both higher. Relieving the pressure of pharmaceutical marketers effectively can improve their sub-health status.