ACS ES&T engineering最新文献

{"title":"Phosphate Uptake over the Innovative La–Fe–CNT Membrane: Structure-Activity Correlation and Mechanism Investigation","authors":"Yi Yang, Xintong You, Shuo Tang, Ying Li, Minyi Liu, Ying Mei, Wei Shu","doi":"10.1021/acsestengg.4c00321","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00321","url":null,"abstract":"Eutrophication caused by excessive phosphorus pollution not only brings a series of environmental problems but also threatens biological safety. The adsorption method has been widely used for preventing eutrophication due to its high selectivity, environmental friendliness, easy operation, and cost-effectiveness. In this study, an easily separated magnetic lanthanum and iron-fabricated carbon nanotube (La–Fe–CNT) membrane was synthesized by a simple combined impregnation and vacuum filtration method for highly effective phosphate uptake. Characterization results show that metallic (hydr)oxide species were successfully fabricated on the CNT membrane, and phosphate was absorbed on it. The structure-activity correlation of La–Fe–CNT was quantitatively investigated by the Box–Behnken design model, and the following optimized conditions were obtained: a reaction temperature of 44 °C, synthesis time of 14.3 h, and La molar ratio of 0.53, with an adsorption capacity of 127 mg/g. La–Fe–CNT performs well over a wide pH range (142 mg/g at pH 2) with high stability (less than 2 mg/L metal leaching). Three interactions exist during the adsorption process, including electrostatic interactions, ligand exchange, and Lewis acid–base interactions. A kinetic study shows that the phosphate adsorption process is a physical-chemical process with combined intraparticle and surface film diffusion. The equilibrium phosphate adsorption capacity of La–Fe–CNT in the isotherm study is 120.2 mg/g, and the phosphate uptake process involves a complex process including both Langmuir and Freundlich adsorption. The adsorbent still retains nearly 70% of its original capacity after 5 cycles of operation, depicting its stability and sustainability for potential industrial applications.","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"202 1","pages":""},"PeriodicalIF":7.1,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chemolysis for Efficient and Sustainable Upcycling of Biodegradable Polyester Waste to Value-Added Products","authors":"Xin Gao, Huayi Shen, Chun-Ran Chang","doi":"10.1021/acsestengg.4c00376","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00376","url":null,"abstract":"It is well-known that conventional disposable plastics, such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PVC), and polystyrene (PS), are causing “white pollution” and becoming one of the greatest challenges to the natural environment worldwide. To overcome severe environmental pollution, policy makers have introduced a series of regulations to reduce and replace the utilization of conventional nonbiodegradable plastics, for instance, guiding plastic manufactories to produce biodegradable (or compostable) plastics instead of conventional nonbiodegradable plastics, banning markets from using or selling conventional nonbiodegradable plastics, and calling on citizens to use and even reuse biodegradable plastics for various applications (including shopping bags and boxes, catering materials, agricultural mulching film, medical devices, etc.). By far, the most common state-of-the-art biodegradable polyester plastics in markets are polylactic acid (PLA), polyhydroxyalkanoates (PHA), polybutylene adipate coterephthalate (PBAT), polyglycolic acid (PGA), polycaprolactone (PCL), polybutylene succinate (PBS), and polypropylene carbonate (PPC) (Figure 1). It is noteworthy that these novel polyesters usually contain sizable ester groups. On the basis of the different physical properties (e.g., melting point, stretchability, percentage of elongation, gas resistance, etc.) and chemical properties (e.g., molecular structures, molecular weights, oxygen and carbon contents, etc.) of these novel polyesters, their functionalities could be adopted in a wide range of industrial and consumer sectors. Figure 1. State-of-the-art emerging polyester plastics and their chemical structures, biological degradation process, and chemolytic valorizations. Theoretically, there should be no further concerns about the end life of biodegradable plastic waste because these types of polyesters are expected to be biologically and completely decomposed quickly into small molecules (e.g., water, carbon dioxide, and methane). However, practically, the realistic situation is that such biological degradation (biodegradation) of biodegradable plastics is strictly conditional, where suitable biodegradation factors must be reached, including temperature, humidity, quality and quantity of microorganisms, large-scale industrial or homemade composting plant, intrinsic degradation properties, etc. In other words, biological decomposition is not spontaneous. Therefore, the utilization of biodegradable plastics cannot guarantee that the plastic pollution issue can be readily and automatically resolved. Considering the fast-growing momentum of biodegradable polyester plastic utilization and the subsequent rapid increase in the amount of biodegradable plastic waste, the current implementation status of the treatment facilities for biodegradable plastics (i.e., industrial composting plant) still lags behind the growth in the use of biodegradable plasti","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"52 1","pages":""},"PeriodicalIF":7.1,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mass Transfer Mechanisms and Decolorization Kinetics of the Mixed Azo Dyes","authors":"Khalida Muda, Mohamad Ali Fulazzaky, Tiffany Messer, Ahmad Hanis Omar, Armstrong Ighodalo Omoregie","doi":"10.1021/acsestengg.4c00258","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00258","url":null,"abstract":"The treatment of dye-contaminated wastewater using granular sludge was evaluated to ensure an effective design process for biogranulation technology. The investigation of dye-contaminated wastewater treatment in a sequencing batch reactor (SBR) aimed to understand the decolorization of mixed azo dyes (MAD) mediated by aerobic granular sludge (AGS) and magnetic-activated carbon aerobic granular sludge (MACAGS). The applicability of Generalized Fulazzaky equations was expanded to predict the mechanisms and kinetics of global, external, and internal mass transfer. The performance of SBR in decolorizing MAD with AGS and MACAGS reached 65.04% and 82.32% efficiency, respectively, exhibiting an increased efficiency of 17.28% (82.32–65.04%) with the presence of magnetic-activated carbon (MAC) in the formation of AGS. A trend in the variation of the internal mass transfer factor was similar to that of the global mass transfer factor and was far higher than that of the external mass transfer factor, indicating that the rate-limiting step of MAD decolorization was dependent on the resistance of external mass transfer. An analysis of the decolorization efficiency based on the internal mass transfer factor provided new insights into the role of MAC in enhancing the SBR performance, contributing to the advanced treatment of dye-contaminated wastewater.","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"4 1","pages":""},"PeriodicalIF":7.1,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Anaerobic Acidogenesis Improvement and Fermentation-Type Regulation by Quorum Sensing","authors":"Shunan Zhao, Ge Song, Suo Liu, Jing Zhao, Kai Zhao, Shaoqing Zhu, Yufei Zeng, Ruiping Liu, Huijuan Liu, Jiuhui Qu","doi":"10.1021/acsestengg.4c00220","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00220","url":null,"abstract":"Anaerobic fermentation of organic wastewater is expected to produce short-chain fatty acids that are available as carbon sources for nitrogen and phosphorus removal in wastewater treatment. By long-term semicontinuous experiments, this study indicated that the introduction of exogenous <i>N</i>-acyl-homoserine lactone (AHL), a quorum sensing (QS) molecule, improved acidogenesis capacity and regulated fermentation type even at low pH. The product concentration increased from 13.5 gCOD/L in the control to 19.9 gCOD/L in the QS enhancement system. Moreover, the acidogenesis pathway related to acetyl-CoA, butyrate, and caproate production was also more highly expressed based on metagenomic sequencing accordingly. Notably, the introduction of exogenous AHL improved chain elongation (CE) during anaerobic fermentation and resulted in a 2.6-fold increase in caproate concentrations. Additionally, the abundance of caproate producers was also increased by 2.0–3.6 folds in the QS enhancement system. Metagenomic analysis results indicated that QS boosted the reverse β-oxidation pathways, and the higher acidogenesis pathway provided more lactate and butyrate available for CE. Importantly, QS enhancement upregulated genes associated with the detection of the typical acid stress signal. Concurrently, three typical acid stress resistance pathways, i.e., proton-consuming reactions, protons efflux, and extracellular polymeric substance production, were activated and highly expressed. Overall, this study proposes a novel strategy to improve microbial resistance to acidic conditions and to regulate the microbial community through QS enhancement and is potentially valuable to enhance resources and energy recovery by anaerobic fermentation.","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"3 1","pages":""},"PeriodicalIF":7.1,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fast Perfluorooctanoic Acid (PFOA) Removal with Honeycomb-like Nitrogen-Doped Carbon Nanosheets: Mechanisms for the Selective Adsorption of PFOA over Competing Contaminants/Water Matrix","authors":"Lingyu Chen, Kuanchang He, Wei Li, Dongmei Ma, Xiaodong Xin, Gang Wang, Qian Liu, Lihui Yang, Faliang Cheng, Sihao Lv, Defeng Xing","doi":"10.1021/acsestengg.4c00418","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00418","url":null,"abstract":"Carbon-based adsorbents have been recently identified as advanced materials for the efficient removal of perfluorooctanoic acid (PFOA); however, the fundamental understanding of the selective adsorption of PFOA over competing contaminants/water matrix is still lacking. Herein, a novel honeycomb-like nitrogen-doped carbon nanosheet (HL-NC@Ni-800) material was reported for the rapid adsorption of PFOA. The PFOA selective adsorption was attributed to (i) favorable steric hindrance that allowed rapid and stable PFOA adsorption, (ii) abundant adsorption sites provided by the honeycomb-like mesoporous structure, (iii) electrostatic attraction between the PFOA anion and nickel cation, (iv) hydrophobic effect between the PFOA tail and nitrogen functional groups, and (v) Lewis acid–base effect. Consequently, PFOA was efficiently removed from the competing contaminants such as 1,4-dioxane and sulfamethoxazole by 94.6 and 89.6%, respectively, as well as the water matrix such as inorganic anions by ∼84–94% and real high-salinity seawater by 75.6–78.4%. The calculated maximum adsorption capacities (<i>q</i>_m) of HL-NC@Ni-800 for PFOA soared to 184.89 mg·g^–1. In addition, the thermodynamically favorable adsorption of PFOA with different steric conformations on HL-NC@Ni-800 provided theoretical explanations for its high-efficiency adsorption performance toward PFOA. This study provides a novel strategy for the synthesis method of efficient adsorbents for PFOA and also elucidates the mechanistic understandings of PFOA selective adsorption over competing contaminants/water matrix, for guiding the design of more efficient adsorbents to treat PFOA-contaminated water.","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"44 1","pages":""},"PeriodicalIF":7.1,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fast Perfluorooctanoic Acid (PFOA) Removal with Honeycomb-like Nitrogen-Doped Carbon Nanosheets: Mechanisms for the Selective Adsorption of PFOA over Competing Contaminants/Water Matrix","authors":"Lingyu Chen,&nbsp;Kuanchang He,&nbsp;Wei Li*,&nbsp;Dongmei Ma,&nbsp;Xiaodong Xin,&nbsp;Gang Wang,&nbsp;Qian Liu,&nbsp;Lihui Yang,&nbsp;Faliang Cheng,&nbsp;Sihao Lv and Defeng Xing*,&nbsp;","doi":"10.1021/acsestengg.4c0041810.1021/acsestengg.4c00418","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00418https://doi.org/10.1021/acsestengg.4c00418","url":null,"abstract":"<p >Carbon-based adsorbents have been recently identified as advanced materials for the efficient removal of perfluorooctanoic acid (PFOA); however, the fundamental understanding of the selective adsorption of PFOA over competing contaminants/water matrix is still lacking. Herein, a novel honeycomb-like nitrogen-doped carbon nanosheet (HL-NC@Ni-800) material was reported for the rapid adsorption of PFOA. The PFOA selective adsorption was attributed to (i) favorable steric hindrance that allowed rapid and stable PFOA adsorption, (ii) abundant adsorption sites provided by the honeycomb-like mesoporous structure, (iii) electrostatic attraction between the PFOA anion and nickel cation, (iv) hydrophobic effect between the PFOA tail and nitrogen functional groups, and (v) Lewis acid–base effect. Consequently, PFOA was efficiently removed from the competing contaminants such as 1,4-dioxane and sulfamethoxazole by 94.6 and 89.6%, respectively, as well as the water matrix such as inorganic anions by ∼84–94% and real high-salinity seawater by 75.6–78.4%. The calculated maximum adsorption capacities (<i>q</i>_m) of HL-NC@Ni-800 for PFOA soared to 184.89 mg·g^–1. In addition, the thermodynamically favorable adsorption of PFOA with different steric conformations on HL-NC@Ni-800 provided theoretical explanations for its high-efficiency adsorption performance toward PFOA. This study provides a novel strategy for the synthesis method of efficient adsorbents for PFOA and also elucidates the mechanistic understandings of PFOA selective adsorption over competing contaminants/water matrix, for guiding the design of more efficient adsorbents to treat PFOA-contaminated water.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"4 12","pages":"3092–3104 3092–3104"},"PeriodicalIF":7.4,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flower-like Polymorphic MnOx Constructed by In Situ L–T Transition with Superior Performance in the Catalytic Ozonation of Dimethyl Sulfide under Humid Conditions","authors":"Feiyang He, Wenji Feng, Xinru Chen, Yunshuo Wu, Haiqiang Wang, Zhongbiao Wu","doi":"10.1021/acsestengg.4c00404","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00404","url":null,"abstract":"To improve the water resistance of manganese oxide (MnO_<i>x</i>) in the catalytic ozonation of dimethyl sulfide (DMS) under humid conditions, polymorphic MnO_<i>x</i> was synthesized based on δ-MnO₂ with reference to the in situ layer-to-tunnel (L–T) transition of minerals in a natural environment. The constructed polymorphic MnO_<i>x</i>(Mn–SH) possessed abundant α–δ (α(Mn)-O-δ(Mn)) interfaces and exhibited superior catalytic activity for the conversion of DMS, ensuring more than 91% of DMS removal under harsh conditions [relative humidity (RH) = 80%] and excellent stability after testing for 20 h (RH = 60–80%). In situ DRIFTS spectra and theoretical calculations demonstrated that α–δ interfaces facilitated the formation of active hydroxyl groups (−OH) through H₂O dissociation, which can participate in ozone (O₃) activation and avoid the deactivation caused by H₂O. Simultaneously, more Brønsted acid sites formed through H₂O dissociation, which promoted DMS adsorption and decomposition. This study gives an understanding of the role of α–δ interfaces in promoting activity for catalytic ozonation and provides a convenient strategy to construct polymorphic MnO_<i>x</i> with enhanced water resistance, which can be applied to existing MnO_<i>x</i> used for catalytic ozonation of sulfur-containing compounds from livestock farms and the petroleum industries.","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"403 1","pages":""},"PeriodicalIF":7.1,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flower-like Polymorphic MnOx Constructed by In Situ L–T Transition with Superior Performance in the Catalytic Ozonation of Dimethyl Sulfide under Humid Conditions","authors":"Feiyang He,&nbsp;Wenji Feng,&nbsp;Xinru Chen,&nbsp;Yunshuo Wu,&nbsp;Haiqiang Wang* and Zhongbiao Wu,&nbsp;","doi":"10.1021/acsestengg.4c0040410.1021/acsestengg.4c00404","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00404https://doi.org/10.1021/acsestengg.4c00404","url":null,"abstract":"<p >To improve the water resistance of manganese oxide (MnO_<i>x</i>) in the catalytic ozonation of dimethyl sulfide (DMS) under humid conditions, polymorphic MnO_<i>x</i> was synthesized based on δ-MnO₂ with reference to the in situ layer-to-tunnel (L–T) transition of minerals in a natural environment. The constructed polymorphic MnO_<i>x</i>(Mn–SH) possessed abundant α–δ (α(Mn)-O-δ(Mn)) interfaces and exhibited superior catalytic activity for the conversion of DMS, ensuring more than 91% of DMS removal under harsh conditions [relative humidity (RH) = 80%] and excellent stability after testing for 20 h (RH = 60–80%). In situ DRIFTS spectra and theoretical calculations demonstrated that α–δ interfaces facilitated the formation of active hydroxyl groups (−OH) through H₂O dissociation, which can participate in ozone (O₃) activation and avoid the deactivation caused by H₂O. Simultaneously, more Brønsted acid sites formed through H₂O dissociation, which promoted DMS adsorption and decomposition. This study gives an understanding of the role of α–δ interfaces in promoting activity for catalytic ozonation and provides a convenient strategy to construct polymorphic MnO_<i>x</i> with enhanced water resistance, which can be applied to existing MnO_<i>x</i> used for catalytic ozonation of sulfur-containing compounds from livestock farms and the petroleum industries.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"4 12","pages":"3010–3020 3010–3020"},"PeriodicalIF":7.4,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New Insights into the Persistent Shock Resistance of Anaerobic Granular Sludge Based on Quorum Sensing Regulation: A Novel Gene Regulatory Mechanism","authors":"Longyi Lv, Ziyin Wei, Chendi Feng, Jiarui Chen, Weiguang Li, Jiyong Bian, Zhijun Ren, Guangming Zhang","doi":"10.1021/acsestengg.4c00334","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00334","url":null,"abstract":"Anaerobic granular sludge (AnGS) is valuable for the treatment of high concentration organic wastewater but is hampered from further development by poor stability. Quorum sensing (QS) has been shown as an effective strategy to enhance the stability of AnGS, whereas the long-term resistance and underlying mechanisms remain uncertain. This work investigates the reinforcing effect of the QS on AnGS and the internal regulation mechanisms. The chemical oxygen demand (COD) removal was maintained at preshock level (90–93%) after multiple temperature shocks in the <i>N</i>-acyl-homoserine lactones (AHLs)-induced system. AHLs-mediated QS led to an increase in gene abundance of the four hydrophobic amino acids with protein (PN) increasing by 33.1%, which optimized the construction of the protective barrier of extracellular polymeric substances (EPS). AHLs also reshaped the functional microbial community and enhanced metabolic activities, promoting both the hydrogenotrophic and methanotrophic methanogenic pathways. In addition, the abundance of <i>Geobacter</i> and <i>Methanothrix</i> was increased by 4.4% and 2.3% under the stimulation of exogenous AHLs, which enhanced the direct interspecies electron transfer (DIET) pathway. This study provides a strategy for enhancing the stability of AnGS in the face of environmental shocks and gives a comprehensive theoretical foundation for exogenous AHLs-mediated QS regulation of anaerobic biological treatment.","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 1","pages":""},"PeriodicalIF":7.1,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Oxygen Vacancies-Mediated Z-Scheme Mechanism Promotes Synergistic Photoelectrocatalysis for Hydroxyl Radical and Singlet Oxygen-Cooperating on Selective Pollutant Degradation","authors":"Duoduo Fang,&nbsp;Di Luo,&nbsp;Han Xiao,&nbsp;Jiaxing Li,&nbsp;Lin Ma,&nbsp;Jiangzhi Zi and Zichao Lian*,&nbsp;","doi":"10.1021/acsestengg.4c0045310.1021/acsestengg.4c00453","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00453https://doi.org/10.1021/acsestengg.4c00453","url":null,"abstract":"<p >Achieving high effective degradation of organic pollutants in sewage having adverse effects on human health and ecosystems remains a major challenge. In this study, an oxygen vacancy (O_v)-mediated Z-scheme Co₃O₄/O_v-TiO₂ heterojunction was first reported for simultaneous selective photoelectrocatalytic pollutant degradation and hydrogen production under visible light irradiation. The optimized Co₃O₄/O_v-TiO₂ exhibited excellent photoelectrocatalytic performance in the degradation of the organic pollutants under visible light irradiation due to the formation of a Z-scheme heterojunction for the utilization of highly reductive photogenerated electrons and oxidative holes. The mechanistic investigation suggested that the synergistic effects of hydroxyl radical and singlet oxygen as the dominant reactive species facilitated the ring-open reactions of the rhodamine B for the mineralization processes. This work provides a deep understanding of designing Z-scheme heterojunction photoelectrocatalysts through defect engineering technologies for sewage treatment.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 1","pages":"77–85 77–85"},"PeriodicalIF":7.4,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143091762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}