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2D-2D heterostructured composites Bi4O5Br2-SnS2 with boosted photocatalytic NOx abatement
Fei Chang,Zhixun Wei,Zhongyuan Zhao,Yingfei Qi,Deng-guo Liu 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.117 No.-
A desirable photocatalytic system ought to feature efficient NOx removal and retardance of toxic NO2 generation. In this investigation, a series of novel two-denominational (2D)-2D composites Bi4O5Br2-SnS2 (XBS) were successfully fabricated through a simple mechanical ball-milling route and characterized systematically. The coexistence of both expected components was confirmed. 2D morphologies of both componentswere stacked in face-to-face manner and thus formed heterojunction structures, verified by SEMand TEM patterns. The visible-light absorption was enhanced in composites caused by the shrinkage ofband gaps. With microstructural and optical merits, these binary composites showed reinforced photocatalyticabatement of NOx and attenuated generation of toxic NO2 under visible light, compared withbare Bi4O5Br2. Successive recycling catalytic experiments revealed the satisfactory reusability and structuralstability of achieved composites. Ultimately, a reasonable type-II model was deduced to describe themigration and transfer of interface carriers based on experimental and analytical results. Such workdesigned and provided various bismuth-based composites constructed by the simple mechanical ballmillingfor controlling and treating nitrogen oxides at ppb level in the atmospheric environment.
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Li Shengyun,Chen Song,Dong Shuanglin,Zhang Min,Deng Zhongyuan,Ni Xinzhi,Huang Jinyong,Li Xianchun 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.3
The enrichment of transposable elements (TEs) within allelochemical- and insecticide-metabolizing P450 alleles in Helicoverpa zea enables these P450s to gain TE-introduced adaptive variations otherwise not readily available to cope with the ever-changing and diverse xenobiotic stress factors in varying cropping systems. The critical role of each TE-inserted P450 allele depends on whether the inserted P450 allele is more adaptive than its TE-free counterpart or not. Previous study has reported a HzSINE1-inserted CYP321A2 allele in a laboratory strain of H. zea reared with xenobiotic-free artificial diets. Here we show that the HzSINE1-inserted CYP321A2 allele transcribes into two HzSINE1 sequence-containing mutant mRNA isoforms of different length that encode an identical C terminus-truncated and heme-binding region deleted non-functional P450. Nonetheless, HzSINE1 insertion does not disrupt the regulatory functional aspect of CYP321A2 since this allele is constitutively expressed and highly inducible by the allelochemicals xanthotoxin, quercetin and chlorogenic acid. Furthermore, while the HzSINE1-inserted CYP321A2 allele is fixed in the laboratory strain, the insertion is purged in the bifenthrin-resistant strain and the Georgia field population of H. zea. To sum up, the HzSINE1-inserted CYP321A2 allele represents an allelochemical-inducible non-functional P450 allele that is selected against in the field populations frequently encountering toxic plant allelochemicals and synthetic insecticides. However, such an insertion can reach fixation under the xenobiotic-free laboratory rearing conditions most likely due to random genetic drift across multiple generations.
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