Enhanced photocatalytic oxidation degradability for real cyanide wastewater by designing photocatalyst GO/TiO2/ZSM-5: Performance and mechanism research

Pan, Yubo; Zhang, Yali; Huang, Yaoguo; Jia, Yun; Chen, Linlin

doi:10.1016/j.cej.2021.131257

Cited by 75 publications

(16 citation statements)

References 49 publications

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“…In addition, the two major peaks in Figure S5d at 458.8 and 464.5 eV can be assigned to Ti 2p 3/2 and Ti 2p 1/2 , where the energy interval is 5.7 eV. 41 The above analysis confirms the chemical composition of Ni/TiO 2 /P-rGO/CS.…”

Section: ■ Results and Discussionsupporting

confidence: 67%

“…The high-resolution XPS in Figure S5b shows the C 1s spectral fitting, which can be divided into three segments: C−C (284.8 eV), C−O (286.3 eV), and C�O (288.69 eV), corresponding to the non-oxygenated sp 2 carbon in graphene, hydroxyl or epoxide, and carbonyl functional groups, respectively. 41 The O 1s spectrum can be divided into two peaks centered at 529.96 and 531.97 eV (Figure S5c), which are attributed to Ti−O bond and C−O bond, respectively. In addition, the two major peaks in Figure S5d at 458.8 and 464.5 eV can be assigned to Ti 2p 3/2 and Ti 2p 1/2 , where the energy interval is 5.7 eV.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The XPS survey spectrum, Figure S5a, shows the presence of Ti, O, and C elements. The high-resolution XPS in Figure S5b shows the C 1s spectral fitting, which can be divided into three segments: C–C (284.8 eV), C–O (286.3 eV), and CO (288.69 eV), corresponding to the non-oxygenated sp 2 carbon in graphene, hydroxyl or epoxide, and carbonyl functional groups, respectively . The O 1s spectrum can be divided into two peaks centered at 529.96 and 531.97 eV (Figure S5c), which are attributed to Ti–O bond and C–O bond, respectively.…”

Section: Results and Discussionmentioning

confidence: 99%

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Dual-Modulated Heterojunctions for Anti-Interference Sensing of Heavy Metals in Seawater

Pang

et al. 2022

Anal. Chem.

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Trace analyte detection in a complex environment such as in seawater is usually challenging for classic redox-based electrochemical sensors since the matrix effect of high salinity and various interfering species with similar redox properties can generate false positive/negative signals, thus impacting the sensitivity and specificity of the sensors. In this work, unlike redox-based approaches, we propose a novel sensing mode that relies on dual-modulated interfacial energy barriers of heterojunctions. By constructing the hierarchical structure of Ni/TiO2/porous-reduced graphene oxide/chitosan (CS), we introduce interfacial energy barriers of Schottky junctions into the electrochemical sensors for Cu2+. Most importantly, we found that two factors, light and the electrostatic interactions between the heterojunctions and Cu2+, can be coupled to regulate the height of the interfacial energy barrier and at last exponentially magnify the sensing signals in response to Cu2+. Since the electrostatic interaction is inert to redox, the proposed sensor is robust against most interfering species even in seawater. Illumination further enhances its sensitivity by 6.23 times and endows it a limit of detection of 0.22 nM. Such a dual-modulated sensing mode is also valid in other heterojunctions such as in the p–n junctions of Ni/NiO/MoS2/CS, demonstrating its potential in more universal applications.

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Section: ■ Results and Discussionsupporting

confidence: 67%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

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Dual-Modulated Heterojunctions for Anti-Interference Sensing of Heavy Metals in Seawater

Pang

et al. 2022

Anal. Chem.

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“…In the research, the main focus of the treatment approach was related to the kinetic behavior of the catalyst. Another study undertaken by Pan, et al [39] developed the utilization of GO/TiO2/ZSM-5 as a photocatalytic oxidation catchment. Moreover, in their research, some process characterization is performed using XPS instrumentation.…”

Section: Millionsmentioning

confidence: 99%

A Sustainable Decision Support System for Drinking Water Systems: Resiliency Improvement against Cyanide Contamination

et al. 2022

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Maintaining drinking water quality is considered important in building sustainable cities and societies. On the other hand, water insecurity is an obstacle to achieving sustainable development goals based on the issues of threatening human health and well-being and global peace. One of the dangers threatening water sources is cyanide contamination due to industrial wastewater leakage or sabotage. The present study investigates and provides potential strategies to remove cyanide contamination by chlorination. In this regard, the main novelty is to propose a sustainable decision support system for the dirking water system in a case study in Iran. First, three scenarios have been defined with low ([CN−] = 2.5 mg L−1), medium ([CN−] = 5 mg L−1), and high ([CN−] = 7.5 mg L−1) levels of contamination. Then, the optimal chlorine dosage has been suggested as 2.9 mg L−1, 4.7 mg L−1, and 6.1 mg L−1, respectively, for these three scenarios. In the next step, the residual cyanide was modelled with mathematical approaches, which revealed that the Gaussian distribution has the best performance accordingly. The main methodology was developing a hybrid approach based on the Gaussian model and the genetic algorithm. The outcomes of statistical evaluations illustrated that both injected chlorine and initial cyanide load have the greatest effects on residual cyanide ions. Finally, the proposed hybrid algorithm is characterized by the multilayer perceptron algorithm, which can forecast residual cyanide anion with a regression coefficient greater than 0.99 as a soft sensor. The output can demonstrate a strong positive relationship between residual cyanide- (RCN−) and injected chlorine. The main finding is that the proposed sustainable decision support system with our hybrid algorithm improves the resiliency levels of the considered drinking water system against cyanide treatments.

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“…Before the deposition of the TiO2 coating, the surface of the titanium plate had been etched with oxygen plasma for 3 min at 100 W of RF power. Subsequently, we employed plasma-enhanced chemical vapor to deposit TiO2 onto the titanium plate at a power level of 200 W, flow rate of oxygen = 40 mL/min, flow rate of Existing methods for degrading antibiotics mainly include the ozone oxidation method [6], Fenton oxidation method [7,8], catalytic wet oxidation method [9,10], photocatalytic oxidation method [11,12], and electrocatalytic oxidation [13,14] methods. Among them, the electrocatalytic oxidation method has received wide attention from scholars because of its excellent selectivity, high degradation efficiency, few byproducts, and operability under normal temperature and pressure [15][16][17][18].…”

Section: Electrode Preparationmentioning

confidence: 99%

Electrocatalytic Degradation of Levofloxacin, a Typical Antibiotic in Hospital Wastewater

Han

et al. 2021

Materials

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Presently, in the context of the novel coronavirus pneumonia epidemic, several antibiotics are overused in hospitals, causing heavy pressure on the hospital’s wastewater treatment process. Therefore, developing stable, safe, and efficient hospital wastewater treatment equipment is crucial. Herein, a bench-scale electrooxidation equipment for hospital wastewater was used to evaluate the removal effect of the main antibiotic levofloxacin (LVX) in hospital wastewater using response surface methodology (RSM). During the degradation process, the influence of the following five factors on total organic carbon (TOC) removal was discussed and the best reaction condition was obtained: current density, initial pH, flow rate, chloride ion concentration, and reaction time of 39.6 A/m2, 6.5, 50 mL/min, 4‰, and 120 min, respectively. The TOC removal could reach 41% after a reaction time of 120 min, which was consistent with the result predicted by the response surface (40.48%). Moreover, the morphology and properties of the electrode were analyzed. The degradation pathway of LVX was analyzed using high-performance liquid chromatography–mass spectrometry (LC–MS). Subsequently, the bench-scale electrooxidation equipment was changed into onboard-scale electrooxidation equipment, and the onboard-scale equipment was promoted to several hospitals in Dalian.

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Enhanced photocatalytic oxidation degradability for real cyanide wastewater by designing photocatalyst GO/TiO2/ZSM-5: Performance and mechanism research

Cited by 75 publications

References 49 publications

Dual-Modulated Heterojunctions for Anti-Interference Sensing of Heavy Metals in Seawater

Dual-Modulated Heterojunctions for Anti-Interference Sensing of Heavy Metals in Seawater

A Sustainable Decision Support System for Drinking Water Systems: Resiliency Improvement against Cyanide Contamination

Electrocatalytic Degradation of Levofloxacin, a Typical Antibiotic in Hospital Wastewater

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