http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
M. Raaja Rajeshwari,Asad Syed,Ali H. Bahkali,Abdallah M. Elgorban,M. Kalil Rahiman,Rajender S. Varma,S. Sudheer Khan 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.115 No.-
In this work, rGO-based ternary dual Z-scheme heterojunction (rGO/CuFe2O4/CdS/Bi2S3 QDs) was formulatedfor the effective photo-Fenton assisted photocatalytic degradation of a b-blocker, atenolol. The catalystwas synthesised via a simple co-precipitation/hydrothermal method and was characterized usingXRD, XPS, FT-IR, SEM, TEM, PL, EIS, ESR, Raman and DRS. It exhibited about 76.5% degradation of atenololin 360 min under visible light irradiation with a rate constant of 0.004 min1 wherein the mechanism ofenhanced activity was attributed to the formation of OH, h+ and photo-Fenton reaction; a possible mechanismwas drafted. The intermediates were determined using GC–MS analysis delineating a plausibledegradation pathway, the mineralization of atenolol being confirmed by TOC analysis. The catalyst wasreusable and highly stable up to six cycles of degradation, as affirmed via XRD and XPS analysis. Further, the toxicity of the catalyst has been studied using the root cells of Allium cepa, and the degradedproduct and intermediates were assessed deploying ECOSAR software. Thus, the proposed work haspotential which can be implemented in future for the large-scale purification of wastewater.
P.R. Sivaranjani,Asad Syed,Abdallah M. Elgorban,Ali H. Bahkali,R. Balakrishnaraja,Rajender S. Varma,S. Sudheer Khan 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.118 No.-
The current study offers the design of a novel photocatalyst for the effective removal of pharmaceuticalswherein the heterojunction was constructed with the objective of capturing maximum solar spectrumand to ensure effective separation of photogenerated charge carriers. The nano-heterojunction was fabricatedthrough ultrasonication-assisted co-precipitation method by the hierarchical deposition of a-Fe2O3 and b-La2S3 on cubic CoCr2O4 spinel. The fabricated nanomaterials were extensively characterizedby using XRD, Raman, FTIR, XPS, SEM, TEM, EDAX, PL, EIS, BET, and DRS. The photoluminescence and EISanalysis revealed the mitigated charge carrier recombination in CoCr2O4/a-Fe2O3/b-La2S3 (CFL) thatresulted in superior photodegradation of doxycycline (DOX) (92.83 %) under visible light irradiation. Mineralization percentage of 92.5 % was affirmed by TOC analysis. Further, the influence of pH, ions, concentrationof DOX and CFL dosage on the photodegradation process was studied. The active participationof the reactive species involved in the reaction were identified by scavenging assay and ESR. Finally, apossible photocatalytic mechanism of CFL for the degradation of DOX with underlying pathway is proposedwith the help of GC–MS/MS analysis. The study highlights the great promise of CFL photocatalystas well as the potential of n-n-p heterojunction for appliances in the photodegradation of organicpollutants.
M. Swedha,Abdulrahman A. Alatar,Mohammad K. Okla,Ibrahim A. Alaraidh,Asmaa Mohebaldin,Mohammed Aufy,Lija L. Raju,Ajith M. Thomas,Mostafa A. Abdel-Maksoud,S. Sudheer Khan 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.112 No.-
Visible light photocatalysis using nano heterostructures offers an eco-friendly alternative for the removalof organic molecules. Here, we reported an enhanced photocatalytic activity of g-C3N4/Ni3(VO4)2/ZnCr2O4, a dual Z-scheme nano-heterojunction for the photocatalytic removal of p-chlorophenol (p-CP)and 5-fluorouracil (5-FU). The nano heterojunction was fabricated by a facile co-precipitation method. Initially, the fabricated nanocomposites (NCs) were characterized for Physico-chemical and optoelectronicproperties, by XRD, XPS, SEM, TEM, UV–Visible DRS, BET, PL, and EIS. The fabricated g-C3N4/Ni3(VO4)2/ZnCr2O4 has shown excellent photocatalytic activity. The complete mineralization of both p-CP and 5-FU observed after 160 and 200 min of visible light irradiation respectively. The mineralizationof p-CP and 5-FU was confirmed by total organic carbon (TOC) estimation and the percentage of removalTOC for p-CP and 5-FU was 99.25% and 98.9% respectively. The stability of the particle was confirmed bysix cycles test. The reusable efficiency of the NCs was found to be 99.7% after six consequent cycles. Thestability of the NCs was confirmed by XRD and XPS analysis of reused photocatalyst. The scavengers assayand ESR analysis confirmed the major role of OH radicals in enhanced photocatalytic activity. The degradationpathway of p-CP and 5-FU was determined by GC–MS/MS and the possible toxicity of the intermediatecompounds was determined by the ECOSAR program, which shows the non-toxic nature ofthe end product on green algae, daphnia, and fish. The toxicity of the NCs was tested against Allium cepawhich further confirm the non-toxic nature of NCs. The study suggests that fabricated g-C3N4/Ni3(VO4)2/ZnCr2O4 NCs can be utilized for environmental remediation applications.