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In this study, novel Z-scheme α-Fe2O3/CoFe2O4 hybrids were used as heterogeneous photo-Fenton-like catalysts to degrade tetracycline (TC) in water through a facile ultrasonic-heating method. The prepared composition, morphology, structure, photoelectric property, and catalytic performance of the samples were investigated. α-Fe2O3/CoFe2O4/H2O2 system degraded 82% of TC within 7 min, which was approximately 1.24 and 1.17 times higher than those of α-Fe2O3/H2O2 and CoFe2O4/H2O2 systems, respectively. Scavenging experiments accompanied by ESR measurements revealed that ⋅O2−, ⋅OH, and h+ are active species involved in the degradation of TC by α-Fe2O3/CoFe2O4/H2O2 system. In particular, ⋅OH and ⋅O2− played significant roles, with ⋅OH being the dominant active oxygen substance in the photo-Fenton-like catalytic process. Based on the experimental result, a possible synergetic effect mechanism comprising a Z-scheme heterostructure and dual Fe3+/Fe2+ in situ redox cycles for H2O2 activation was proposed. Hence, this work is an environmentally favorable photo-Fenton-like catalytic system, which will address the environmental issues arising from antibiotics and facilitate sustainable development. [ABSTRACT FROM AUTHOR]

Background: The association of hypertension and blood pressure control with fecundability among women is not yet elucidated. The purpose of this study was to evaluate the hypothesis that maternal preconception hypertension would be associated with reduced fecundability and that blood pressure control could reduce excess risk., Methods: Using the National Free Preconception Checkup Projects in Guangdong Province, China, 1422 couples whose female partners had been diagnosed with hypertension and 997 703 reference couples whose female partners were without hypertension were included in this prospective cohort study. Fecundability was measured by time to pregnancy (TTP) and infertility (TTP >12 months)., Results: Compared with women without hypertension, those with controlled hypertension (time ratio, 1.47 [95% CI, 1.24-1.73]) or uncontrolled hypertension (time ratio, 1.59 [95% CI, 1.34-1.90]) were associated with prolonged TTP and increased risk of infertility (relative risk, 1.19 [95% CI, 1.09-1.31]; relative risk, 1.24 [95% CI, 1.14-1.34]). However, using instrumental variable analyses, there was no significant association between blood pressure control and TTP (time ratio, 0.68 [95% CI, 0.34-1.36]; P =0.270) or infertility (relative risk, 0.97 [95% CI, 0.70-1.34]; P =0.849) among women with hypertension. These results were consistent in the propensity score matching and inverse probability of treatment weighting analyses., Conclusions: Maternal hypertension, with or without controlled blood pressure, was independently associated with prolonged TTP and an increased risk of infertility. These findings may provide insights for the implementation of preconception hypertension screening and the design of future trials.